September 2012 - Devel - oVirt List Archives

[Engine-devel] Splitting out the oVirt engine installer
by Derek Higgins 30 Oct '12

30 Oct '12

Hi All, First time poster here so let me know if this is better directed some where else I have been writing a installer for openstack and as a base for this I've split out the generic parts of your engine-setup utility[1]. In order to do this I've created a generic installer[2] that is basically all of the parts of the oVirt engine installer that I needed for my openstack installer[3] I'd now like to see if there is interest here to use this generic installer for oVirt. I may have stripped out some stuff from the installer that I should have left in, if that is the case I'm open to recreating this repository with anything generic I shouldn't have stripped out so that the original history is maintained. Would anybody here like to look into the work necessary to use this installer in oVirt? For openstack I've made exclusive use of the plugin functionality and I suspect most changes that would be needed for oVirt would be to move a lot of the code into a similar pattern. If you have any questions/comments just let me know, hopefully you will find this useful and other projects could make use of the great work you have done developing this setup utility Thanks, Derek. [1] https://github.com/derekhiggins/ovirt-engine/tree/master/packaging/fedora/s… [2] https://github.com/derekhiggins/installer [3] https://github.com/derekhiggins/os-installer

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[Engine-devel] AsyncTaskManager and the irsbroker
by Laszlo Hornyak 24 Oct '12

24 Oct '12

hi, I have just noticed that AsyncTaskManager is - almost all of the public methods are synchronized - and it is singleton - calling to VDS operations (line 291) Therefore this may be a performance bottleneck. Even when you want to create an asynchronous task or query a task's state, you may have to wait till a remote vdsm responds. Would it be ok to remove the synchronization from e.g. the query-like methods? Or the one initiating remote calls? Laszlo

2 1

[Engine-devel] RFE: Netwrok Main Tab
by Alona Kaplan 15 Oct '12

15 Oct '12

Hi all, Please review the wiki and add your comments. http://wiki.ovirt.org/wiki/Feature/NetworkMainTab RFE: https://bugzilla.redhat.com/858742 Thanks, Alona.

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[Engine-devel] libosinfo integration
by Roy Golan 11 Oct '12

11 Oct '12

Here's a draft wiki of the libosinfo integration with the engine http://wiki.ovirt.org/wiki/Libosinfo please share your comments on this thread and I'll update the wiki accordingly. Thanks, Roy

7 13

[Engine-devel] Frontend questions.
by snmishra＠linux.vnet.ibm.com 02 Oct '12

02 Oct '12

Hi, I am looking at adding support for novnc in ovirt. I have not worked on the frontend and thought of asking some questions to the list to save time. Currently, when a user selects to open console on a VM with VNC. They get a popup window with IP, port and password for VNC session. I plan to take this info to host and run the command - novnc_server --vnc IP:(port-5900) This command returns a URL, use this url to open a new browser window which will be a vnc session to the VM. My questions are - 1. How to run the novnc-server command on the host? 2. How to open a new URL for VNC session? Thanks Sharad Mishra

4 3

[Engine-devel] Running test suites on other OSs
by Allon Mureinik 30 Sep '12

30 Sep '12

Hi guys, After some on-and-off work over the last week (thanks Daniel!), as of this morning, engine's test suite runs successfully on a couple of non-fedora/rhel OSs[1]. The easier to get/build/test the code, the more likely we'll be to get more developers on board, so let's try and keep it this way. How to achieve this, in one sentence: "Assumption is the mother of all screw-ups" Some slightly more detailed pointers: 1. File separators: Remember File.separatorChar? good. 2. TimeZones: If your test implicitly assumes a time zone (i.e., has anything to do with date formatting, DST changes, etc.), set it explicitly - don't assume that everyone's env shares your timezone 3. org.junit.Assume is your friend Thanks, Allon [1] Don't ask, don't tell: http://gerrit.ovirt.org/#/c/8192/5

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[Engine-devel] [ATTENTION] Engine now uses PKCS#12 format to store private keys
by Alon Bar-Lev 30 Sep '12

30 Sep '12

Hello All, We committed a change in the method engine uses to store private keys. So far the engine used Java proprietary JKS format, this format enabled only Java applications to access the keys, and made it hard to manipulate them using external programs. >From now the engine is using the standard PKCS#12 format to store keys and associated certificate chain. PKCS#12 format is standard and supported by many applications, and it allowed simpler enrollment procedure. We also issue different certificate and key to be used as engine authentication (SSH, VDSM), and to be used for engine web interface (HTTPS). This change has two reasons: 1. Allow simpler migration to 3rd party certificate for the web interface. 2. Separate between different private key usages (signature and key exchange). engine-upgrade script has been modified to upgrade the environment to the new state. Please CC me for every issue you may experience. Regards, Alon.

1 0

[Engine-devel] Local build failing.
by snmishra＠linux.vnet.ibm.com 27 Sep '12

27 Sep '12

Hi, My local build is failing today. I cloned the ovirt-engine repo and ran 'mvn clean install". Failed with following error - Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project vdsbroker: Compilation failure [ERROR] /tmp/ovirt-engine/backend/manager/modules/vdsbroker/src/main/java/org/ovirt/engine/core/vdsbroker/VdsManager.java:[604,44] illegal start of expression I noticed that Jenkins build succeeded after this change was merged. -Sharad

4 3

[Engine-devel] Serial Execution of Async Tasks
by Allon Mureinik 27 Sep '12

27 Sep '12

Hi guys, As you may know the engine currently has the ability to fire an SPM task, and be asynchronously be "woken-up" when it ends. This is great, but we found the for the Live Storage Migration feature we need something a bit complex - the ability to have a series of async tasks in a single control flow. Here's my initial design for this, your comments and criticism would be welcome: http://wiki.ovirt.org/wiki/Features/Serial_Execution_of_Asynchronous_Tasks_… -Allon

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[Engine-devel] engine build AD/LDAP error
by Dead Horse 25 Sep '12

25 Sep '12

I have built ovirt-engine from the latest GIT master over the past few nights and am running into a MS AD/LDAP error. This same MS AD setup works fine with Released 3.1. Current nightly builds from jenkins are not building all the GWT permutations (Internet Explorer for example) so I have been attempting to re-build the engine so I can test using Internet Explorer. It would be nice if the nightly jenkins builds could be changed to do the build with all GWT permutations enabled. I am building in an FC17 environment with updates applied and current as of today. Accordingly maven3 and all build dependencies are installed from the FC17 repositories. I tried the latest nightly from Jenkins and it does not exhibit the below error. I am guessing I must not have the build recipe/env correct. The AD error I am running into looks like: 2012-09-24 16:15:44,037 ERROR [org.ovirt.engine.core.bll.adbroker.DirectorySearcher] (ajp--127.0.0.1-8702-4) Failed ldap search server LDAP:// someserver.foo.com:389 due to Kerberos error. Please check log for further details.. We should not try the next server 2012-09-24 16:15:44,039 ERROR [org.ovirt.engine.core.bll.adbroker.GSSAPIDirContextAuthenticationStrategy] (ajp--127.0.0.1-8702-2) Error from Kerberos: java.lang.NullPointerException at org.ovirt.engine.core.bll.adbroker.GSSAPICallbackHandler.handle(GSSAPICallbackHandler.java:47) at javax.security.auth.login.LoginContext$SecureCallbackHandler$1.run(LoginContext.java:969) at javax.security.auth.login.LoginContext$SecureCallbackHandler$1.run(LoginContext.java:966) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.login.LoginContext$SecureCallbackHandler.handle(LoginContext.java:965) at com.sun.security.auth.module.Krb5LoginModule.promptForPass(Krb5LoginModule.java:870) at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:715) at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:580) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at javax.security.auth.login.LoginContext.invoke(LoginContext.java:784) at javax.security.auth.login.LoginContext.access$000(LoginContext.java:203) at javax.security.auth.login.LoginContext$4.run(LoginContext.java:698) at javax.security.auth.login.LoginContext$4.run(LoginContext.java:696) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:695) at javax.security.auth.login.LoginContext.login(LoginContext.java:594) at org.ovirt.engine.core.bll.adbroker.GSSAPIDirContextAuthenticationStrategy.authenticateToKDC(GSSAPIDirContextAuthenticationStrategy.java:127) at org.ovirt.engine.core.bll.adbroker.GSSAPIDirContextAuthenticationStrategy.explicitAuth(GSSAPIDirContextAuthenticationStrategy.java:119) at org.ovirt.engine.core.bll.adbroker.GSSAPIDirContextAuthenticationStrategy.authenticate(GSSAPIDirContextAuthenticationStrategy.java:111) at org.ovirt.engine.core.bll.adbroker.GSSAPILdapTemplateWrapper.useAuthenticationStrategy(GSSAPILdapTemplateWrapper.java:86) at org.ovirt.engine.core.bll.adbroker.PrepareLdapConnectionTask.call(PrepareLdapConnectionTask.java:56) at org.ovirt.engine.core.bll.adbroker.DirectorySearcher.find(DirectorySearcher.java:103) at org.ovirt.engine.core.bll.adbroker.DirectorySearcher.FindAll(DirectorySearcher.java:48) at org.ovirt.engine.core.bll.adbroker.LdapSearchGroupsByQueryCommand.executeQuery(LdapSearchGroupsByQueryCommand.java:22) at org.ovirt.engine.core.bll.adbroker.LdapBrokerCommandBase.execute(LdapBrokerCommandBase.java:69) at org.ovirt.engine.core.bll.adbroker.LdapBrokerBase.RunAdAction(LdapBrokerBase.java:18) at org.ovirt.engine.core.bll.SearchQuery.adSearch(SearchQuery.java:194) at org.ovirt.engine.core.bll.SearchQuery.searchAdGroups(SearchQuery.java:172) at org.ovirt.engine.core.bll.SearchQuery.executeQueryCommand(SearchQuery.java:79) at org.ovirt.engine.core.bll.QueriesCommandBase.ExecuteCommand(QueriesCommandBase.java:71) at org.ovirt.engine.core.dal.VdcCommandBase.Execute(VdcCommandBase.java:41) at org.ovirt.engine.core.bll.Backend.runQueryImpl(Backend.java:384) at org.ovirt.engine.core.bll.Backend.RunQuery(Backend.java:367) at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:374) at org.ovirt.engine.core.utils.ThreadLocalSessionCleanerInterceptor.injectWebContextToThreadLocal(ThreadLocalSessionCleanerInterceptor.java:11) at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.jboss.as.ee.component.ManagedReferenceLifecycleMethodInterceptorFactory$ManagedReferenceLifecycleMethodInterceptor.processInvocation(ManagedReferenceLifecycleMethodInterceptorFactory.java:123) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:36) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ejb3.component.singleton.SingletonComponentInstanceAssociationInterceptor.processInvocation(SingletonComponentInstanceAssociationInterceptor.java:53) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInNoTx(CMTTxInterceptor.java:211) at org.jboss.as.ejb3.tx.CMTTxInterceptor.supports(CMTTxInterceptor.java:363) at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:194) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:165) at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:173) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:72) at org.ovirt.engine.core.common.interfaces.BackendLocal$$$view9.RunQuery(Unknown Source) at org.ovirt.engine.ui.frontend.server.gwt.GenericApiGWTServiceImpl.RunQuery(GenericApiGWTServiceImpl.java:51) at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.google.gwt.rpc.server.RPC.invokeAndStreamResponse(RPC.java:196) at com.google.gwt.rpc.server.RpcServlet.processCall(RpcServlet.java:161) at com.google.gwt.rpc.server.RpcServlet.processPost(RpcServlet.java:222) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:489) at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:466) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:505) at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:445) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) at java.lang.Thread.run(Thread.java:722) - DHC

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[Engine-devel] UI Plugins: PoC patch revision 5 is here
by Vojtech Szocs 21 Sep '12

21 Sep '12

------=_Part_2529172_1797931071.1348259851826 Content-Type: multipart/alternative; boundary="----=_Part_2529173_585113360.1348259851826" ------=_Part_2529173_585113360.1348259851826 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hi guys, it's been a while but here comes the latest revision of UI Plugins proof-of-concept patch (please find it attached). This revision was originally meant to focus solely on server-side components of the plugin infrastructure. However, I ended up implementing all the major concepts and ideas as discussed on engine-devel mailing list, impacting both client-side and server-side parts of the plugin infrastructure. As a result, UI plugin infrastructure should be pretty much complete now, so we can focus on specific plugin API features in upcoming PoC revisions. There's a whole bunch of changes and improvements in this revision, so I'll try to cover all the relevant parts step by step. If you have any comments, questions or ideas, please let me know! So here we go... (or if you just want to get the patch, find the link at the end of this message) 0. Added new Engine configuration values UI plugin data path is represented by ConfigValues.UIPluginDataPath enum option ("UIPluginDataPath" in vdc_options table), and resolved relative to ConfigValues.DataDir if possible. Following (default) values: * UIPluginDataPath = ui-plugins * DataDir = /usr/share/ovirt-engine result in UI plugin data path: /usr/share/ovirt-engine/ui-plugins UI plugin config path is represented by ConfigValues.UIPluginConfigPath enum option ("UIPluginConfigPath" in vdc_options table), and resolved relative to ConfigValues.ConfigDir if possible. Following (default) values: * UIPluginConfigPath = ui-plugins * ConfigDir = /etc/ovirt-engine result in UI plugin config path: /etc/ovirt-engine/ ui-plugins 1. Processing UI plugin data on the server PluginDataManager is the class responsible for reading, validating and caching UI plugin descriptor/configuration data on the server (Engine). It has two main responsibilities: * return a snapshot of currently valid plugin data ( getCurrentData method ) * reload plugin data from local file system if necessary ( reloadData method) The reloadData method doesn't modify "live" plugin data directly. Instead, it creates a local working copy of current plugin data, updates this copy as it reads/validates plugin descriptor and configuration files, and attempts to update "live" plugin data through conditional reference re-assignment (using java.util.concurrent.atomic.AtomicReference.compareAndSet method). In other words, reloadData method makes no attempts with regard to Java lock-based synchronization, in favor of dealing with "live" data through AtomicReference (reference that involves atomic volatile reads and writes): * In the best case, a thread will succeed in updating "live" data ( AtomicReference.compareAndSet == true), which means that "live" data remained unchanged since this thread acquired a reference of current plugin data. * In the worst case, a thread will NOT succeed in updating "live" data ( AtomicReference.compareAndSet == false), which means that "live" data was already changed by another thread since this thread acquired a reference of current plugin data. In my opinion, when dealing with external resources like the local file system, this is a good compromise between performance and up-to-date data. While we might not get "completely-up-to-date" data at the given point in time ( reloadData + getCurrentData ), we are guaranteed to get "recently-up-to-date" and consistent data. In other words, the requirement of "completely-up-to-date" data would involve synchronized statements that would hurt performance. In my (very humble) opinion, the benefit of having "completely-up-to-date" data , at the cost of reduced performance, is not really worth it, especially in our case when the user can just hit refresh (F5) to reload WebAdmin and its plugin data. Plugin descriptor files are expected to be placed in UI plugin data path , for example: /usr/share/ovirt-engine/ui-plugins/foo.json Following descriptor file attributes are implemented and recognized by the plugin infrastructure: * name : A name that uniquely identifies the plugin (required attribute). * url : URL of plugin host page that invokes the plugin code (required attribute). * config : Default configuration object associated with the plugin (optional attribute). * resourcePath : Path to plugin static resources, relative to UI plugin data path (optional attribute). This is used when serving plugin files through Engine PluginResourceServlet (more on this below). Plugin configuration files are expected to be placed in UI plugin config path, for example: /etc/engine/ui-plugins/foo-config.json Note that plugin configuration files follow the "<descriptorFileName>-config.json" convention. Following configuration file attributes are implemented and recognized by the plugin infrastructure: * config : Custom configuration object associated with the plugin (optional attribute). This overrides the default plugin descriptor configuration, if any. * enabled : Indicates whether the plugin should be loaded on WebAdmin startup (optional attribute). Default value is 'true'. * order : Defines the relative order in which the plugin will be loaded on WebAdmin startup (optional attribute). Default value is Integer.MAX_VALUE (lowest order). The concept of merging custom configuration ( config attribute in foo-config.json ), if any, on top of default configuration ( config attribute in foo.json ), if any, remains unchanged. This makes the plugin configuration quite flexible - in my opinion, the added complexity of handling/merging such configuration is definitely worth the effort. The enabled attribute is straight-forward, allowing users to turn the given plugin off, if necessary. In future, users should still be able to load such plugins through WebAdmin GUI. The order attribute controls the order in which plugins are loaded on WebAdmin startup. Since plugin resources are fetched asynchronously by the browser, this is basically a way of imposing some degree of determinism in the "generally-non-deterministic" plugin environment, which is helpful when troubleshooting problems with multiple plugins. This attribute is also helpful due to file listing methods in java.io.File giving no guarantees that files would be listed in any particular order (otherwise we could just go for the "NN-<descriptorFileName>.json" convention, with NN being the order number). 2. Modified behavior of WebadminDynamicHostingServlet WebadminDynamicHostingServlet is the servlet used to serve WebAdmin application host page (HTML page that bootstraps WebAdmin JavaScript code). In addition to its former behavior, as part of handling the given request, WebadminDynamicHostingServlet : * reloads descriptor/configuration data from local file system if necessary, and obtains a snapshot of currently valid plugin data ( PluginDataManager.reloadAndGetCurrentData ) * embeds all plugin meta-data, suitable for use in client-side plugin infrastructure , into WebAdmin host page as "pluginDefinitions" JavaScript a rray ( PluginDefinitions ) As a result, reloading UI plugin descriptor/configuration data is as simple as refreshing (F5) WebAdmin application in the browser (no need to restart Engine). 3. Added servlet for serving plugin static resources PluginResourceServlet is the servlet used to serve UI plugin static files (plugin host page, 3rd party JavaScript, etc.) from the local file system. For example, requesting URL: * http://<EngineManagerHost>:8700/webadmin/webadmin/plugin/foo/content/start.html will send the content of: * /usr/share/ovirt-engine/ui-plugins/<resourcePath>/ content/start.html to the client. As shown in the above example: * /webadmin/webadmin/plugin/ is the servlet root path for PluginResourceServlet * in the extra path beyond the servlet root path ( /foo/content/start.html ): * /foo represents the name of the plugin * /content/start.html represents the path to requested resource, relative to " UIPluginDataPath / < resourcePath >" Note that each plugin using PluginResourceServlet to serve its static files must declare non-empty resourcePath attribute in within the plugin descriptor. Also note that PluginResourceServlet , unlike WebadminDynamicHostingServlet , does NOT reload descriptor/configuration data from local file system as part of handling the given request. In other words, it's assumed that plugin data has already been (re)loaded when serving WebAdmin application host page, with subsequent requests to PluginResourceServlet reading the current plugin information. Until we solve the cross-origin issue in a clean way, PluginResourceServlet should be used to serve all plugin resources from local file system. 4. Plugin lifecycle improved to deal with misbehaving plugins PluginState enum has been modified to deal with plugins that allow uncaught exceptions to escape from plugin event handler functions (e.g. "UiInit"): * removed state INITIALIZED * added state INITIALIZING : The plugin is (currently) being initialized by calling UiInit event handler function. * added state IN_USE : Plugin's UiInit event handler function has completed successfully, we can now call other event handler functions as necessary. The plugin is in use now. * added state FAILED : An uncaught exception escaped while calling an event handler function, which indicates internal error within the plugin code. The plugin is removed from service. I've attached a simple state diagram that illustrates different states and transitions between them (green color is initial state, red color is end state). Uncaught exceptions in plugin event handler functions will be caught and handled by the plugin infrastructure. This prevents a misbehaving plugin from breaking WebAdmin application, since WebAdmin is the caller (initiator) of the function call. In such case, the plugin will be removed from service. Update on cross-origin issue (consequence of same-origin policy) In order for the plugin to access WebAdmin plugin API, plugin host page (e.g. start.html ) must be served from URL on same origin as Engine origin. Otherwise, plugin code running in the context of an iframe'd host page will fail to evaluate "parent.pluginApi" expression, with "parent" being top-level (WebAdmin) window, and "pluginApi" being the global plugin API object exposed by WebAdmin. This is why PluginResourceServlet , available on Engine origin, should be used to serve all plugin resources from local file system. There's only one issue that remains to be solved: cross-origin "plugin vs. remote service" communication, with "remote service" being anything other than Engine (REST API). In future, we'll address this with Apache reverse proxy configuration, so that users can configure Apache server (placed in front of Engine JBoss AS) to put arbitrary (local or remote non-Engine) services on same origin. However, this requires a change in current Apache configuration. Until then, users can manually edit the Engine Apache configuration file ( /etc/httpd/conf.d/ovirt-engine.conf ). I've attached some sample plugin files for you to experiment with. Instead of attaching actual patch file (92 kB) to this email, I've submitted the patch to oVirt Gerrit: http://gerrit.ovirt.org/8120 Let me know what you think! Cheers, Vojtech ------=_Part_2529173_585113360.1348259851826 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><style type=3D'text/css'>p { margin: 0; }</style></head><body><= div style=3D'font-family: times new roman,new york,times,serif; font-size: = 12pt; color: #000000'>Hi guys, it's been a while but here comes the= latest revision of UI Plugins proof-of-concept patch (please find it attac= hed). This revision was originally meant to focus solely on server-s= ide components of the plugin infrastructure. However, I ended up implementi= ng all the major concepts and ideas as discussed on engine-devel mailing li= st, impacting both client-side and server-side parts of the plugin infrastr= ucture. As a result, UI plugin infrastructure should be pretty much complet= e now, so we can focus on specific plugin API features in upcoming PoC rev= isions. There's a whole bunch of changes and improvements in this re= vision, so I'll try to cover all the relevant parts step by step. If you ha= ve any comments, questions or ideas, please let me know! So here we = go... (or if you just want to get the patch, find the link at the end of th= is message) <hr style=3D"width: 100%; height: 2px;"> 0. A= dded new Engine configuration values UI plugin data path is represented by ConfigValues.UIPlug= inDataPath enum option ("UIPluginDataPath" in vdc_options table), and resolved relative to ConfigValues.DataDir if possible. Following= (default) values: <ul><li>UIPluginD= ataPath =3D ui-plugins</li><li>D= ataDir =3D /usr/share/ovirt-engine </li></ul>result in UI plugin = data path: /usr/share/ovirt-engine/ui-p= lugins UI plugin = config path is represented by Co= nfigValues.UIPluginConfigPath enum option ("UIPluginConfigPath" in <= span style=3D"font-style: italic;">vdc_options table), and resolved = relative to ConfigValues.ConfigDir</spa= n> if possible. Following (default) values: <ul><li>UIPluginConfigPath =3D ui-plugins</li><li>ConfigDir =3D /etc/ovirt-engine</li></ul><= p>result in UI plugin config path: /etc= /ovirt-engine/ui-plugins<= /p> 1. Processing UI plugin data on t= he server PluginDataManager is the class responsible for reading= , validating and caching UI plugin descriptor/configuration data on the ser= ver (Engine). It has two main responsibilities: <ul><li>return a snapsho= t of currently valid plugin data (getCu= rrentData method) </li><li>reload plugin data from local file sys= tem if necessary (reloadData met= hod)</li></ul>The reloadData<= /span> method doesn't modify "live" plugin data directly. Instead, it creat= es a local working copy of current plugin data, updates this copy as it rea= ds/validates plugin descriptor and configuration files, and attempts to upd= ate "live" plugin data through conditional reference re-assignment (using <= span style=3D"font-style: italic;">java.util.concurrent.atomic.AtomicRefere= nce.compareAndSet method). In other words, reloadData method makes no attempts with= regard to Java lock-based synchronization, in favor of dealing with "live"= data through AtomicReference (r= eference that involves atomic volatile<= /span> reads and writes):<ul><li> In the best case, a thread will succe= ed in updating "live" data (AtomicRefer= ence.compareAndSet =3D=3D true), which means that "live" data remain= ed unchanged since this thread acquired a reference of current plugin data.= </li><li>In the worst case, a thread will NOT succeed in updating "live" da= ta (AtomicReference.compareAndSet</span= > =3D=3D false), which means that "live" data was already changed by anothe= r thread since this thread acquired a reference of current plugin data.</li= ></ul>In my opinion, when dealing with external resources like the local= file system, this is a good compromise between performance and up-to-date = data. While we might not get "completely-up-to-date" data at the given poin= t in time (reloadData + getCurrentData), we are guaranteed to ge= t "recently-up-to-date" and consistent data. In other words, the requiremen= t of "completely-up-to-date" data would involve synchronized statements that would hurt performance. In my = (very humble) opinion, the benefit of having "completely-up-to-date" data,= at the cost of reduced performance, is not really worth it, especially in = our case when the user can just hit refresh (F5) to reload WebAdmin and its= plugin data. Plugin descriptor files are expected to be placed in UI plugin d= ata path, for example: /usr/share/ovirt= -engine/ui-plugins/foo.json Following descriptor fi= le attributes are implemented and recognized by the plugin infrastructure:<= /p><ul><li>name: A name that uni= quely identifies the plugin (required attribute).</li><li>url: URL of plugin host page that invokes the plu= gin code (required attribute).</li><li>= config: Default configuration object associated with the plugin (opt= ional attribute).</li><li>resourcePath<= /span>: Path to plugin static resources, relative to UI plugin data path (o= ptional attribute). This is used when serving plugin files through Engine <= span style=3D"font-style: italic;">PluginResourceServlet (more on th= is below). </li></ul>Plugin configuration files are expected to be placed in UI plugin= config path, for example: /etc/engine/= ui-plugins/foo-config.json Note that plugin con= figuration files follow the "<descriptorFileName>-config.json" conven= tion. Following configuration file attributes are implemen= ted and recognized by the plugin infrastructure:<ul><li>config: Custom configuration object associated = with the plugin (optional attribute). This overrides the default plugin des= criptor configuration, if any.</li><li>= enabled: Indicates whether the plugin should be loaded on WebAdmin s= tartup (optional attribute). Default value is 'true'.</li><li>order: Defines the relative order in which = the plugin will be loaded on WebAdmin startup (optional attribute). Default= value is Integer.MAX_VALUE (low= est order).</li></ul>The concept of merging custom configuration (config attribute in foo-config.json), if any, on top of default config= uration (config attribute in <sp= an style=3D"font-style: italic;">foo.json), if any, remains unchange= d. This makes the plugin configuration quite flexible - in my opinion, the = added complexity of handling/merging such configuration is definitely worth= the effort. The e= nabled attribute is straight-forward, allowing users to turn the giv= en plugin off, if necessary. In future, users should still be able to load = such plugins through WebAdmin GUI. The order attribute controls the order in which plu= gins are loaded on WebAdmin startup. Since plugin resources are fetched asy= nchronously by the browser, this is basically a way of imposing some degree= of determinism in the "generally-non-deterministic" plugin environment, wh= ich is helpful when troubleshooting problems with multiple plugins. This at= tribute is also helpful due to file listing methods in java.io.File giving no guarantees that files would b= e listed in any particular order (otherwise we could just go for the "NN-&l= t;descriptorFileName>.json" convention, with NN being the order number).= 2. Modified behavior of Weba= dminDynamicHostingServlet WebadminDynamicHostingServlet is the s= ervlet used to serve WebAdmin application host page (HTML page that bootstr= aps WebAdmin JavaScript code). In addition to its former behavior, a= s part of handling the given request, W= ebadminDynamicHostingServlet: <ul><li>reloads descriptor/configuration data from local file syste= m if necessary, and obtains a snapshot of currently valid plugin data (<spa= n style=3D"font-style: italic;">PluginDataManager.reloadAndGetCurrentData</= span>)</li><li>embeds all plugin meta-data, suitable for use in client-side= plugin infrastructure, into WebAdmin host page as "pluginDefinitions" Java= Script array (PluginDefinitions)= </li></ul>As a result, reloading UI plugin descriptor/configuration dat= a is as simple as refreshing (F5) WebAdmin application in the browser (no n= eed to restart Engine). 3. Added = servlet for serving plugin static resources PluginResourceServlet</span= > is the servlet used to serve UI plugin static files (plugin host page, 3r= d party JavaScript, etc.) from the local file system. For example, r= equesting URL: <ul><li>http://<En= gineManagerHost>:8700/webadmin/webadmin/plugin/foo/content/start.html</s= pan></li></ul>will send the content of:<ul><li>/usr/share/ovirt-engine/ui-plugins/<resourcePath>/</sp= an>content/start.html</li></ul><= p>to the client. As shown in the above example:<ul><li= >/webadmin/webadmin/plugin/ is t= he servlet root path for PluginResource= Servlet </li><li>in the extra path beyond the servlet root path (= /foo/content/start.html):</li><ul><li>/foo represents the name of the plugin</li><li>/content/start.html represents the path to requ= ested resource, relative to "UIPluginDataPath / <resourcePath>" </= li></ul></ul>Note that each plugin using PluginResourceServlet to serve its static files must declare non-e= mpty resourcePath attribute in w= ithin the plugin descriptor. Also note that PluginResourceServlet, unlike WebadminDynamicHostingServlet, does NOT reload descriptor/= configuration data from local file system as part of handling the given req= uest. In other words, it's assumed that plugin data has already been (re)lo= aded when serving WebAdmin application host page, with subsequent requests = to PluginResourceServlet reading= the current plugin information. Until we solve the cross-origin iss= ue in a clean way, PluginResourceServle= t should be used to serve all plugin resources from local file syste= m. 4. Plugin lifecycle improved t= o deal with misbehaving plugins PluginState enum has been modified to deal with plugins that = allow uncaught exceptions to escape from plugin event handler functions (e.= g. "UiInit"): <ul><li>removed state = INITIALIZED</li><li>added state = INITIALIZING: The plugin is (currently) being initialized by calling= UiInit event handler function.</li><li>added state IN_USE: Plugin's UiInit event handler function has comp= leted successfully, we can now call other event handler functions as necess= ary. The plugin is in use now.</li><li>added state FAILED: An uncaught exception escaped while calling an e= vent handler function, which indicates internal error within the plugin cod= e. The plugin is removed from service. </li></ul>I've attached a simple = state diagram that illustrates different states and transitions between the= m (green color is initial state, red color is end state). Uncaught e= xceptions in plugin event handler functions will be caught and handled by t= he plugin infrastructure. This prevents a misbehaving plugin from breaking = WebAdmin application, since WebAdmin is the caller (initiator) of the funct= ion call. In such case, the plugin will be removed from service. <sp= an style=3D"font-weight: bold;">Update on cross-origin issue (consequence o= f same-origin policy) In order for the plugin to access WebAd= min plugin API, plugin host page (e.g. = start.html) must be served from URL on same origin as Engine origin.= Otherwise, plugin code running in the context of an iframe'd host page wil= l fail to evaluate "parent.pluginApi" expression, with "parent" being top-l= evel (WebAdmin) window, and "pluginApi" being the global plugin API object = exposed by WebAdmin. This is why PluginResourceServlet, available on Engine origin, should be used t= o serve all plugin resources from local file system. There's only on= e issue that remains to be solved: cross-origin "plugin vs. remote service"= communication, with "remote service" being anything other than Engine (RES= T API). In future, we'll address this with Apache reverse proxy configurati= on, so that users can configure Apache server (placed in front of Engine JB= oss AS) to put arbitrary (local or remote non-Engine) services on same orig= in. However, this requires a change in current Apache configuration. Until = then, users can manually edit the Engine Apache configuration file (/etc/httpd/conf.d/ovirt-engine.conf).<b= r> <hr style=3D"width: 100%; h= eight: 2px;"> I've attached some sample plugin files for you to experime= nt with. Instead of attaching actual patch file (92 kB) to this email, I've= submitted the patch to oVirt Gerrit: http://gerrit.ovirt.org/8120 L= et me know what you think! Cheers, Vojtech </div></body></= html> ------=_Part_2529173_585113360.1348259851826-- ------=_Part_2529172_1797931071.1348259851826 Content-Type: application/x-compressed-tar; name=ui-plugin-sample-files.tar.gz Content-Disposition: attachment; filename=ui-plugin-sample-files.tar.gz Content-Transfer-Encoding: base64 H4sIAOnHXFAAA+1abVMjNxLmq/0rFH8BUjZ+t684lipu2VRI7Qu1gdxdvlzJM7ItGI8mGo2BbO1/ z9PSzNgmgGEDzl6turZie0bqbvXT6n4kIkzQ3HphaUGGw777HPRWPnPZandanWG71+13Olutdrvb am+x/ks7RpKlhmvGtubp7ypI7x+37v3/qQjgL+KJjMXLpcHT8e/0ewOP/yZkCf9MNpIow9f0mVPh KfgPsPFb7d6g1/L4b0KyVH+V9b879PhvQgj/dMr1C5b/L6n/vZ7v/xuRBf4vxwKejn932PL9fyPy J/xfgAU8qf93B8AfLMD3/43IQ/iPlWqMZST+aiZYvPuPwx//Bf7DwaDr8d+EPIT/iOuN4j8YtLud vsO/3/H4b0Ieh3+gYiNi84V58IT930bv32p12t2W5/8bkbvP/1T5gflYTvYuUhX/RRsE8KDXuw// NnZ+vv9b3SHh3x72B9j/rWdZ4Rr5xvH/VK1Wmt9XK+x79hqhUDPmcM80N1LFTI0uRGAYT1MVSG5E yK6kmTIzFcwlC9tRCY3kEePGaDnKjNjdswrPpjJlai60lqFI7ZxQjHkWmWIuHgdaJkbpVbN1JseM 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1 0

[Engine-devel] Duplicities in tranlations
by David Jaša 20 Sep '12

20 Sep '12

Hi, given that my language is not yet included in language set in Zanata (why?), I've had a look at existing translation - and I noticed non-negligible number of duplicities in the translation: for example, just trio of "Create", "Delete" and "Edit Properties" was repeated six times on the first page of LocalizedEnums! This is a recipe for translater frutration at best and translation errors at worst. Can there be some guideline and effort to limit proliferation of new strings by reusing existing ones? David -- David Jaša, RHCE SPICE QE based in Brno GPG Key: 22C33E24 Fingerprint: 513A 060B D1B4 2A72 7F0D 0278 B125 CD00 22C3 3E24

2 1

Re: [Engine-devel] [Users] base url of ovirt
by Juan Hernandez 20 Sep '12

20 Sep '12

Copying engine-devel, as I think this is something we should discuss and maybe do. On 09/18/2012 10:50 PM, Jon Thomas wrote: > Is there some config in the engine to set up the web interface base url > so that instead of https://localhost.localdomain/ it is > https://localhost.localdomain/ovirt ? No, there is no such config. I think this should be the default, I mean, we should have this /ovirt prefix in all our URLs, to make coexistence with other users of the web server easy. -- Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta 3ºD, 28016 Madrid, Spain Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.

3 5

[Engine-devel] ovirt-cli 3.2.0.3 - important changes
by Michael Pasternak 20 Sep '12

20 Sep '12

Two commands renamed: -------------------- - "create" command renamed with "add" #855773. - "delete" command renamed with "remove" #855769. Changed authentication procedure: -------------------------------- - added username/password prompt/conf-file functionality (see [1] for more details). [1] http://wiki.ovirt.org/wiki/CLI#Connect * For complete list of changes, see change log. -- Michael Pasternak RedHat, ENG-Virtualization R&D

1 0

[Engine-devel] Upstream git repo hung
by Dhandapani 20 Sep '12

20 Sep '12

This is a multi-part message in MIME format. --------------050104080601090706000007 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I got, /fatal: The remote end hung up unexpectedly/ -- Regards, Dhandapani --------------050104080601090706000007 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> <tt>I got, </tt><tt>fatal: The remote end hung up unexpectedly</tt><tt> </tt><tt> </tt><tt>--</tt><tt> </tt><tt>Regards,</tt><tt> </tt><tt>Dhandapani</tt><tt> </tt> </body> </html> --------------050104080601090706000007--

4 7

[Engine-devel] gwt error with nightly engine builds and IE8/9
by Dead Horse 19 Sep '12

19 Sep '12

I have been seeing this issue with the latest nightly engine builds for quite a few weeks now with Internet Explorer Version 8 and 9. ERROR: Possible problem with your *.gwt.xml module file. The compile time user.agent value (gecko1_8) does not match the runtime user.agent value (ie9). Expect more errors. Is this a known issue? - DHC

2 1

[Engine-devel] upgrade scripts - Please keep keys ordered
by Yair Zaslavsky 16 Sep '12

16 Sep '12

At config_0000.sql (backend/manager/dbscripts/upgrade/pre_upgrade directory) at Alphabetic order. Kind regards, Yair

1 0

[Engine-devel] oVirt Workshop Europe 2012: Call For Participation
by workshop-pc＠ovirt.org 14 Sep '12

14 Sep '12

================================================================= oVirt Workshop Europe 2012: Call For Participation November 7-9, 2012 - Hotel Fira Palace - Barcelona, Spain (All submissions must be received before midnight Sep 14th, 2012) ================================================================= The oVirt Project is an open virtualization project for anyone who cares about Linux-based KVM virtualization. Providing a feature-rich server virtualization management system with advanced capabilities for hosts and guests, including high availability, live migration, storage management, system scheduler, and more. By open we mean open source & open governance, done right. During this workshop you’ll learn about the technical background and direction of the oVirt project. You’ll meet the developers, and have an opportunity to see and dive into the code right away. The workshop is open to all who want to use, get involved with, or learn about the comprehensive open virtualization management platform, oVirt. The sessions cover the technical projects details, governance, getting involved, usage, and much more. If you have any interest in an Open Virtualization Management platform, this workshop is for you! We are excited to announce that this oVirt Workshop will be held in conjunction with the KVM Forum. http://events.linuxfoundation.org/events/kvm-forum/ The KVM Forum and oVirt Workshop are co-located with the Linux Foundation's 2012 LinuxCon Europe in Barcelona, Spain. oVirt Workshop attendees will be able to attend KVM Forum sessions and are eligible to attend LinuxCon Europe for a discounted rate. http://events.linuxfoundation.org/events/kvm-forum/register We invite you to lead part of the discussion by submitting a speaking proposal for oVirt Workshop 2012. http://events.linuxfoundation.org/cfp Suggested topics: - community use case/stories - roadmaps - deep dives into features/areas - deep dives into code/debugging/tuning - integration and extensions - components: engine, vdsm, node, sdk/cli, reports, mom, guest agent, etc. - subjects: network, storage, vm life cycle, scheduling & sla, gluster, etc. - packaging, installation and distributions - community infrastructure and services SUBMISSION REQUIREMENTS Abstracts due: Sep 14th, 2012 Notification: Sep 28th, 2012 Please submit a short abstract (~150 words) describing your presentation proposal. In your submission please note how long your talk will take. Slots vary in length up to 45 minutes. Also include in your proposal the proposal type -- one of: - technical talk - end-user talk - birds of a feather (BOF) session Submit your proposal here: http://events.linuxfoundation.org/cfp You will receive a notification whether or not your presentation proposal was accepted by Sep 14th. END-USER COLLABORATION One of the big challenges as developers is to know what, where and how people actually use our software. We will reserve a few slots for end users talking about their deployment challenges and achievements. If you are using oVirt in production you are encouraged submit a speaking proposal. Simply mark it as an end-user collaboration proposal. As an end user, this is a unique opportunity to get your input to developers. BOF SESSION We will reserve some slots in the evening after the main conference tracks, for birds of a feather (BOF) sessions. These sessions will be less formal than presentation tracks and targetted for people who would like to discuss specific issues with other developers and/or users. If you are interested in getting developers and/or uses together to discuss a specific problem, please submit a BOF proposal. LIGHTNING TALKS In addition to submitted talks we will also have some room for lightning talks. These are short (5 minute) discussions to highlight new work or ideas that aren't complete enough to warrant a full presentation slot. Lightning talk submissions and scheduling will be handled on-site at oVirt Workshop. HOTEL / TRAVEL The oVirt Workshop Europe 2012 will be held in Barcelona, Spain at the Hotel Fira Palace. http://events.linuxfoundation.org/events/kvm-forum/hotel Thank you for your interest in oVirt. We're looking forward to your submissions and seeing you at the oVirt Workshop Europe 2012 in November! Thanks, your oVirt Workshop Europe 2012 Program Commitee Please contact us with any questions or comments. workshop-pc(a)ovirt.org

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[Engine-devel] [RFC] ovirt-engine - vdc_config default options
by Alon Bar-Lev 13 Sep '12

13 Sep '12

Hello All, I would like to discuss the method we use to manage default options. I believe it can be significantly simplified. Please read though and comment. Thank you, Alon Bar-Lev --- CURRENT STATE Most options are located in three different locations. Let's explain by example... The FenceQuietTimeBetweenOperationsInSec option. --- ConfigValues.java --- public enum ConfigValues { <snip> @Reloadable @TypeConverterAttribute(Integer.class) @DefaultValueAttribute("180") FenceQuietTimeBetweenOperationsInSec(30), <snip> } --- --- 0000_config.sql --- <snip> select fn_db_add_config_value('FenceQuietTimeBetweenOperationsInSec','180','general'); <snip> --- --- engine-config.properties --- <snip> FenceQuietTimeBetweenOperationsInSec.type=Integer FenceQuietTimeBetweenOperationsInSec.validValues=60..600 FenceQuietTimeBetweenOperationsInSec.description="Fence quiet time between operations (in seconds)" FenceQuietTimeBetweenOperationsInSec.alternateKey=Fence_Quiet_Time <snip> --- ConfigValues.java is the base, it defines all options and appropriate metadata as annotations. It defines the option name, type, default value, and if reloadable. 0000_config.sql adds all parameters into the database using their default value, we actually duplicate the parameter name and default value into the sql script. Please note that even if we do not add the parameter to the database the engine infrastructure will use the default value specify at ConfigValues. engine-config.properties is used as an interface to engine-config utility, a command-line utility that can manipulate engine options. engine-config manages only options that are specified in this property files. Property files specifies user friendly description, valid values, alias, but duplicate the option name and type that already specified in ConfigValues. engine-config will only manage options that exists in database. QUESTIONS 1. Why do we store default values in database? >From what I managed to gather, we store default values in database under the assumption that we need to keep defaults when we upgrade from one version to another. However, in most cases when upgrading an application the new defaults should apply as long as they were not overridden by user. Keeping old default as a new value is an exception that can be taken care of during the upgrade process for selected options. 2. Why do we keep properties file? In practice we could specify the metadata within the property files as annotations in ConfigValues.java. So why do we actually need the properties file? >From what I managed to gather, we use the property file as an interface to support personal, to allow adding/removing options exposed to the engine-config utility. An addition of option to the property file exposes it. SUGGESTED STATE Establish a single place to manage options. Do not store default values in database. Provide alternate method of exposing internal options to engine-config utility. --- ConfigValues.java --- public enum ConfigValues { <snip> @Reloadable @Public @TypeConverterAttribute(Integer.class) @Restriction.IntegerRange(60, 600) @DefaultValueAttribute("180") @Description("Fence quiet time between operations (in seconds)") FenceQuietTimeBetweenOperationsInSec(30), <snip> } --- BENEFITS No duplication of option name, type, default value, etc... between multiple files. One place to role them all. Simpler upgrade sequence, in most cases as we do want the new defaults to apply. METHOD 1. Add @Public annotation for ConfigValues, to expose options to engine-config instead of the properties file. 2. Add @Restrict annotation for ConfigValues, instead of validValues of properties file. 3. Add @Description annotation for ConfigValues, instead of description of properties file. 4. Add engine-config --internal parameter to allow get/set/list of none @Public option, instead of the need to update the properties file. 5. Modify enigne-config [set] to add option if does not exist in database and does not match default value. 6. Modify engine-config [set] to delete option if value matches default value. 7. Modify engine-config [get] to retrieve default from ConfigValues if value is missing from database. 8. Create upgrade script which deletes all options with value that matches the default from the database. IMPLICATIONS The option alias is removed. Can be added at later time if required using own @Alias annotation. Not sure it is actually required.

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[Engine-devel] Update on UI Plugins: PoC patch revision 4
by Vojtech Szocs 13 Sep '12

13 Sep '12

------=_Part_15477537_1702327251.1346339532819 Content-Type: multipart/alternative; boundary="----=_Part_15477538_89478576.1346339532819" ------=_Part_15477538_89478576.1346339532819 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hello everyone, as a follow-up to my last email on improving plugin API, here comes the latest revision of UI Plugins proof-of-concept patch (please find it attached). This patch is focused on improving JavaScript plugin API, along with important changes and improvements made to plugin infrastructure ( PluginManager ). Let's walk through the changes step by step. Improved plugin API, taking some inspiration from jQuery Following is a sample plugin code that uses new plugin API: var myPlugin = pluginApi('myPlugin'); // Obtain plugin API instance for 'myPlugin' var myPluginConfig = myPlugin.configObject(); // Obtain plugin-specific configuration // Register event handler functions to be invoked by WebAdmin // Note: all functions are optional, the plugin only defines functions for events it wants to handle myPlugin.register({ UiInit: function() { var testUrl = 'http://www.example.com/' + myPluginConfig.foo; // Assume plugin configuration has 'foo' attribute myPlugin.ui.addMainTab('Custom Tab', 'custom-tab', testUrl); // Invoke some operation using plugin API } }); myPlugin.ready(); // Event handler functions are registered, we are now ready to get initialized (UiInit) UI plugin life-cycle, enforced by plugin infrastructure The PluginState enumeration lists possible states of a plugin during its runtime: * DEFINED : This is the initial state for all plugins. Plugin meta-data has been read by PluginManager and the corresponding iframe element has been created for the plugin. Note that at this point, the iframe element is not attached to DOM yet. * LOADING : The iframe element for the plugin has been attached to DOM, which causes plugin host page (previously known as plugin source page) to be fetched asynchronously in the background. We are now waiting for plugin to report in as ready. In practice, due to JavaScript runtime being single-threaded, WebAdmin startup logic will continue to execute until the JavaScript runtime is "idle" (browser event loop returns), and at this point JavaScript plugin code gets invoked through the plugin host page. * READY : The plugin has indicated that it is ready for use. We assume the plugin has already registered its event handler object (object containing various event handler functions to be called by WebAdmin) at this point. We can now proceed with plugin initialization. * INITIALIZED : The plugin has been initialized by calling UiInit function on its event handler object. We can now call other event handler functions, the plugin is now initialized and in use. Note on plugin initialization: the UiInit function will be called just once during the lifetime of the plugin, after the plugin reports in as ready AND WebAdmin enters the state that allows plugins to be invoked (entering main section for logged-in users), and before other event handler functions are invoked by the plugin infrastructure. Plugin meta-data is now passed to client using different format Previously, plugin meta-data was embedded into WebAdmin host page as a simple JavaScript object, like so: var pluginDefinitions = { myPlugin: "<URL>", anotherPlugin: "<URL>" } Now, plugin meta-data is embedded into WebAdmin host page as a JavaScript array, like so: var pluginDefinitions = [ { name: "myPlugin", url: "<URL>", config: { "foo": 1, "bar": "whatever" } }, { name: "anotherPlugin", url: "<URL>" } ]; As you can see, pluginDefinitions is now an array of JavaScript objects, with each object representing plugin meta-data . The "name" and "url" attributes are mandatory (we need to check them when loading plugin descriptors). "config" is the plugin configuration (JSON) object, obtained by merging default plugin configuration (defined in plugin descriptor) with custom plugin configuration (defined in external plugin configuration file) . Note that the "config" attribute is optional. In terms of Java classes, pluginDefinitions is mapped to PluginDefinitions overlay type, and each meta-data object within the array is mapped to PluginMetaData overlay type. Note on using assert statements in client code : you might notice that I'm using a lot of assert statements in Plugin class. This is to ensure consistency and guard against corrupted state during development. In GWT, assert statements work in a different way than in standard Java VM. When debugging GWT application using Development Mode, assert statements are checked and throw assertion errors during runtime (they are displayed in Development Mode console). However, when compiling GWT application to JavaScript (Production Mode), assert statements are removed by GWT compiler, so they don't affect the application running in Production Mode. Let me know what you think guys. Cheers, Vojtech ------=_Part_15477538_89478576.1346339532819 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><style type=3D'text/css'>p { margin: 0; }</style></head><body><= div style=3D'font-family: times new roman,new york,times,serif; font-size: = 12pt; color: #000000'>Hello everyone, as a follow-up to my last emai= l on improving plugin API, here comes the latest revision of UI Plugins pro= of-of-concept patch (please find it attached). This patch is focused= on improving JavaScript plugin API, along with important changes and impro= vements made to plugin infrastructure (PluginManager). Let's walk = through the changes step by step. <hr style=3D"width: 100%; height: = 2px;"> Improved plugin API, taking some inspiration from jQuery<= /strong> Following is a sample plugin c= ode that uses new plugin API: var myPlugin =3D pluginApi('myPlugi= n'); // Obtain plugin API instance for 'myPlugin' var myPluginCon= fig =3D myPlugin.configObject(); // Obtain plugin-specific configuration</s= pan> // Register event handler functions to be invoked by WebAdmin</spa= n> // Note: all functions are optional, the plugin only defines function= s for events it wants to handle myPlugin.register({ &nb= sp; UiInit: function() {     var testUrl =3D 'http= ://www.example.com/' + myPluginConfig.foo; // Assume plugin configuration h= as 'foo' attribute     myPlugin.ui.addMainTab('Cus= tom Tab', 'custom-tab', testUrl); // Invoke some operation using plugin API=   } }); myPlugin.ready(); // Event han= dler functions are registered, we are now ready to get initialized (UiInit)= <hr style=3D"width: 100%; height: 2px;"> UI plugin life-cycle, enforced by plugin infrastructure</sp= an> The PluginState enumeration lists possible states of a plugin durin= g its runtime: <ul><li>DEFINED= : This is the initial state for all plugins. Plugin meta-data has been read= by PluginManager and the corres= ponding iframe element has been created for the plugin. Note that at this p= oint, the iframe element is not attached to DOM yet. </li><li>LOADING: The iframe element for the plu= gin has been attached to DOM, which causes plugin host page (previou= sly known as plugin source page) to be fetched asynchronously in the backgr= ound. We are now waiting for plugin to report in as ready. In practice, due= to JavaScript runtime being single-threaded, WebAdmin startup logic will c= ontinue to execute until the JavaScript runtime is "idle" (browser event lo= op returns), and at this point JavaScript plugin code gets invoked through = the plugin host page. </li><li>RE= ADY: The plugin has indicated that it is ready for use. We assume th= e plugin has already registered its event handler object (object containing= various event handler functions to be called by WebAdmin) at this point. W= e can now proceed with plugin initialization. </li><li>INITIALIZED: The plugin has been initialized= by calling UiInit function on i= ts event handler object. We can now call other event handler functions, the= plugin is now initialized and in use.</li></ul>Note on plugin initialization:</spa= n> the UiInit function will be c= alled just once during the lifetime of the plugin, after the plugin reports= in as ready AND WebAdmin enters the state that allows plugins to be invoke= d (entering main section for logged-in users), and before other event handl= er functions are invoked by the plugin infrastructure. <hr st= yle=3D"width: 100%; height: 2px;"> Plugi= n meta-data is now passed to client using different format <p= >Previously, plugin meta-data was embedded into WebAdmin host page as a sim= ple JavaScript object, like so: var pluginDefinitions =3D { m= yPlugin: "<URL>", anotherPlugin: "<URL>" } <p= >Now, plugin meta-data is embedded into WebAdmin host page as a JavaScript = array, like so: var pluginDefinitions =3D [  {= name: "myPlugin", url: "<URL>", config: { "foo": 1, "bar": "whatever= " } },  { name: "anotherPlugin", url: "<URL>" } ];</p= > As you can see, pluginDe= finitions is now an array of JavaScript objects, with each object re= presenting plugin meta-data. The "name" and "url" attributes are mandatory = (we need to check them when loading plugin descriptors). "config" is the pl= ugin configuration (JSON) object, obtained by merging default plugin config= uration (defined in plugin descriptor) with custom plugin configuration (de= fined in external plugin configuration file). Note that the "config" attrib= ute is optional. In terms of Java classes, pluginDefinitions is mapped to PluginDefinitions overlay type, and each me= ta-data object within the array is mapped to PluginMetaData overlay type. <hr style=3D"wi= dth: 100%; height: 2px;"> Note on using assert statements in client code:= you might notice that I'm using a lot of assert statements in Plugin class. This is to ensure consistency= and guard against corrupted state during development. In GWT, assert state= ments work in a different way than in standard Java VM. When debugging GWT = application using Development Mode, assert statements are checked and throw= assertion errors during runtime (they are displayed in Development Mode co= nsole). However, when compiling GWT application to JavaScript (Production M= ode), assert statements are removed by GWT compiler, so they don't affect t= he application running in Production Mode. Let me know= what you think guys. Cheers,Vojtech = </div></body></html> ------=_Part_15477538_89478576.1346339532819-- ------=_Part_15477537_1702327251.1346339532819 Content-Type: text/x-patch; name=WIP-UI-Plugins-PoC-revision-4.patch Content-Disposition: attachment; filename=WIP-UI-Plugins-PoC-revision-4.patch Content-Transfer-Encoding: base64 RnJvbSBlYjQ3NzlkYTZjODUxMmIwNjA3Mzk5ZTg4MzAwMWQxYmUwMzA1OGI4IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBWb2p0ZWNoIFN6b2NzIDx2c3pvY3NAcmVkaGF0LmNvbT4KRGF0 ZTogVGh1LCAxOSBKdWwgMjAxMiAxNDo0ODo0MCArMDIwMApTdWJqZWN0OiBbUEFUQ0hdIFdJUDog VUkgUGx1Z2lucyBQb0MsIHJldmlzaW9uIDQKCkNoYW5nZS1JZDogSWJiZjc2NTlmMDIzZDg5Mjlm YjBhODMwMzA2MTg1MWJiN2VlNTU1YmMKU2lnbmVkLW9mZi1ieTogVm9qdGVjaCBTem9jcyA8dnN6 b2NzQHJlZGhhdC5jb20+Ci0tLQogLi4uL3NlcnZlci9nd3QvR3d0RHluYW1pY0hvc3RQYWdlU2Vy dmxldC5qYXZhICAgICAgfCAgICAxICsKIC4uLi9zZXJ2ZXIvZ3d0L1BsdWdpblNvdXJjZVBhZ2VT ZXJ2bGV0LmphdmEgICAgICAgIHwgIDEwNiArKysrKysrCiAuLi4vc2VydmVyL2d3dC9XZWJhZG1p 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[Engine-devel] is gerrit.ovirt.org down? <eom>
by Shireesh Anjal 13 Sep '12

13 Sep '12

8 10

[Engine-devel] Fixed -Xmx could kill your JVM
by Juan Hernandez 12 Sep '12

12 Sep '12

Hello, I recently discovered that I made a mistake in the engine service script. The problem is that were running the JVM with the "-Xms option twice, like this: java -Xms1g -Xms1g ... That doesn't correctly limit the max amount of heap space. It has been fixed in a recent commit [1], so with the updated code the engine will run by default like this: java -Xms1g -Xmx1g ... With this change you could start to see OutOfMemory errors if your engine was using a lot of memory, if you are running stress tests, for example. In that case remember that you can adjust this changing the ENGINE_HEAP_MIN and ENGINE_HEAP_MAX parameters in /etc/sysconfig/ovirt-engine. For example, to use 2g instead of the default of 1g: ENGINE_HEAP_MIN=2g ENGINE_HEAP_MAX=2g The restart the engine. Let me know if you have issues. Regards, Juan Hernandez [1] http://gerrit.ovirt.org/7952 -- Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta 3ºD, 28016 Madrid, Spain Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.

4 4

[Engine-devel] network subnet
by Livnat Peer 12 Sep '12

12 Sep '12

Hi All, Today when a user wants to define a network subnet mask, he does it when he attaches the network to a host NIC. I was wondering if there is a reason not to define the network subnet on the logical network entity (Data center level). Thanks, Livnat

4 8

[Engine-devel] what does engine with cpuIdle?
by Laszlo Hornyak 12 Sep '12

12 Sep '12

hi, I am trying to change a behavior in vdsm. When you pass 100% load on a VM, it will stop reporting further load and will keep telling 100% until the load drops under 100% again in it's cpuIdle information. This is totally correct if you have only single-cpu VM's, but it is false when you have multiple vcpu's, I think the cpuIdle information should not be on a 0-100 scale, but on a 0-100*vcpus scale. So I submitted this patch to vdsm: http://gerrit.ovirt.org/#/c/7892/2 and Dan pointed out that some functionality may depend on the value in the 0-100 interval. For me it seems it is ignored and the load is calculated only from sysCpu + userCpu. Does anyone build on the cpuIdle value? Thanks, Laszlo

4 8

[Engine-devel] i18n status / availability of pot files for translators
by David Jaša 11 Sep '12

11 Sep '12

Hi, I was wondering about $SUBJ. When will translators be able to lay their hands on the initial .pot files, sometimes around 3.2 freeze? The only mention of translation I've seen is in release notes of 3.1 promising translations to be included in 3.2, so it would be quite nice to give translators some time to work on them... David -- David Jaša, RHCE SPICE QE based in Brno GPG Key: 22C33E24 Fingerprint: 513A 060B D1B4 2A72 7F0D 0278 B125 CD00 22C3 3E24

3 3