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oVirt.js - API & implementation design summary
by Vojtech Szocs 17 Jun '14

17 Jun '14

Hello, this is a follow-up to my oVirt.js announcement email, I'd like to give you a quick summary of API & implementation design. In other words, I'll try to describe key decisions in oVirt.js API & implementation. 1, General design We're trying to follow best practices in JavaScript development, such as: - containing the whole SDK in a single global variable (because until ES6 we cannot truly avoid global variables) and using IIFE/closure for better information hiding - using ES5 "use strict" (Strict Mode) on function level (so that Strict Mode compliant environments will detect problems early) while not relying on semantical differences introduced by Strict Mode (main reason = IE9) 2, API design As presented in earlier "oVirt JavaScript SDK: Design Proposal" session, our main goals here are API usability and readability. (If you missed this session before, let me know and I'll forward you the slides.) - using fluent interface concept, for example: ovirt.api.datacenters.list().success(dcsListedCallback).run(); - separating the concept of resource (collection) vs. operation (operation = reusable RESTful method abstraction) - separating three logical namespaces: * ovirt.svc -- services used by API implementation Each service should be an object containing reusable methods. 1. existing services can be overridden to achieve SDK portability for given runtime environment. 2. existing services can be used and new services can be added by SDK extensions or clients. * ovirt.util -- utilities used by API implementation Unlike services, utilities are meant to assist with writing more efficient JavaScript code. * ovirt.api -- API as the main entry point to SDK functionality 3, Implementation design I've tried to catch up with my JavaScript knowledge recently, but I'm not an expert, I'm still learning things. Following are ideas which I took into practice within oVirt.js API implementation: - creating objects via mixins, each mixin is a function which gets some object ("that") and adds new properties to that object (augmentation) - simple dependency injection mechanism for mixins, with dependencies resolved against "ovirt.svc" namespace, for example: // Create new object, "spec" = information needed for object creation. function makeSomeObject (spec) { return mixins.mix(spec, [mixinOne, mixinTwo], // array of mixin functions ['depNameOne', 'depNameTwo'] // array of dependency names ); } // "that" = object to augment. // "spec" = information provided for object creation. // "my" = object containing shared secrets, for more details see [1] function mixinOne (that, spec, my) { // Augment "that" with "quack" method, utilize closure to capture // "spec.name" without exposing it to users of "that" object. that.quack = function () { console.log(spec.name + ' says quack!'); // Consume "depNameOne" service, resolved from ovirt.svc namespace that.doSomething = function () { my.depNameOne.whatever(); } } [1] JavaScript: The Good Parts (2008) by Douglas Crockford, chapter "Inheritance", section "Functional" - explanation of "my" object within functional constructor pattern We are NOT using "new" operator in JavaScript. We are also NOT relying on object's prototype chain. We are simply creating useful objects via mixins, which is in my opinion the most simple and flexible way. Regards, Vojtech

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oVirt Node Weekly Meeting Minutes -- 2014-06-17
by Fabian Deutsch 17 Jun '14

17 Jun '14

Minutes: http://ovirt.org/meetings/ovirt/2014/ovirt.2014-06-17-13.01.html Minutes (text): http://ovirt.org/meetings/ovirt/2014/ovirt.2014-06-17-13.01.txt Log: http://ovirt.org/meetings/ovirt/2014/ovirt.2014-06-17-13.01.log.html ================================= #ovirt: oVirt Node Weekly Meeting ================================= Meeting started by fabiand at 13:01:20 UTC. The full logs are available at http://ovirt.org/meetings/ovirt/2014/ovirt.2014-06-17-13.01.log.html . Meeting summary --------------- * Agenda (fabiand, 13:01:36) * Build Status (3.0.5) (fabiand, 13:01:55) * Feature Status (3.5) (fabiand, 13:02:01) * Feature Status (ovirt-node-3.1) (fabiand, 13:02:13) * Other Items (fabiand, 13:02:17) * Action Item Review (fabiand, 13:03:35) * LINK: http://resources.ovirt.org/meetings/ovirt/2014/ovirt.2014-06-10-13.01.txt (fabiand, 13:04:05) * fabiand to finish OVA builds and push (fabiand, 13:04:47) * ovirt-appliance is pushed (sources) (fabiand, 13:05:27) * LINK: http://gerrit.ovirt.org/gitweb?p=ovirt-appliance.git (fabiand, 13:06:02) * LINK: http://dummdida.tumblr.com/post/88944206100/say-hello-to-the-ovirt-engine-v… (fabiand, 13:07:35) * announced on devel(a)ovirt.org (fabiand, 13:07:44) * rbarry about to post the email (fabiand, 13:10:45) * fabiand did not yet build images for 3.4.2 and 3.5 b/c of a failing tool (fabiand, 13:11:41) * Build Status (3.0.5) (fabiand, 13:12:14) * 3.0.5 is ready, just needs to be published with 3.5 packages (fabiand, 13:12:30) * Feature Status (3.5) (fabiand, 13:12:56) * hosted-engine-plugin -- Merged awaits testing (fabiand, 13:13:09) * generic-registration -- Merged and needs testing, not enabled by default (fabiand, 13:15:08) * generic registration needs more discussion, which will hopefully take place on the devel@ ml (fabiand, 13:17:01) * Engine part of generic registration is merged. (fabiand, 13:18:09) * rbarry to also discuss how the migratoin to the genric-registration can take place (in the TUI, and AI) (fabiand, 13:26:21) * ovirt-appliance -- Pushed to gerrit and announced (fabiand, 13:26:46) * needs testing (fabiand, 13:26:49) * Feature Status (ovirt-node-3.1) (fabiand, 13:27:57) * Considering to release ovirt-node-3.1 with all 3.5 features plus some additional before 3.5 TestDays (fabiand, 13:29:59) * ACTION: Node team to review and merge pending patches (as long as the patch is in a good shape) (fabiand, 13:31:19) * Other Items (fabiand, 13:31:33) * Some patches in gerrit are pending and -1'ed - because they basically go into the blivet direction, but we also consider anaconda, they are on hold (fabiand, 13:33:33) Meeting ended at 13:34:56 UTC. Action Items ------------ * Node team to review and merge pending patches (as long as the patch is in a good shape) Action Items, by person ----------------------- * **UNASSIGNED** * Node team to review and merge pending patches (as long as the patch is in a good shape) People Present (lines said) --------------------------- * fabiand (125) * rbarry (21) * bkp (12) * ovirtbot (5) * doron (3) * doron_afk (1) Generated by `MeetBot`_ 0.1.4 .. _`MeetBot`: http://wiki.debian.org/MeetBot

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[oVirt 3.5 Localization Question #1] "Permissive"
by Yuko Katabami 17 Jun '14

17 Jun '14

This is a multi-part message in MIME format. --------------000200000508080200080403 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hello all, I am a Brisbane-based translator working on oVirt 3.5 localization project along with 5 other translators, each specialized in a different locale. Our localization cycle is just kicked off and I would like to post our questions to this mailing list, just as I did for 3.4. It would be greatly appreciated if you could help us by answering questions, so that we can ensure accuracy of our translations, based on the context. Here is our first question. *File:***LocalizedEnums* **Resource ID:*** SELinuxMode___PERMISSIVE* **Strings:*** Permissive *Question:* Could someone explain to us how this appears in the Admin Portal? (we currently do not have a demo environment and cannot check it on the screen). Translators usually leave SELinux modes untranslated as they appear in the command line in English, however this string starts with the uppercase letter "P". We just wonder if this is used as descriptive or it refers exactly the "permissive" mode as shown in the terminal. Kind regards, Yuko Katabami --------------000200000508080200080403 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 text="#000000" bgcolor="#FFFFFF"> Hello all, <div class="moz-signature"> I am a Brisbane-based translator working on oVirt 3.5 localization project along with 5 other translators, each specialized in a different locale. Our localization cycle is just kicked off and I would like to post our questions to this mailing list, just as I did for 3.4. It would be greatly appreciated if you could help us by answering questions, so that we can ensure accuracy of our translations, based on the context. Here is our first question. File: LocalizedEnums Resource ID: <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> SELinuxMode___PERMISSIVE Strings: <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> Permissive Question: Could someone explain to us how this appears in the Admin Portal? (we currently do not have a demo environment and cannot check it on the screen). Translators usually leave SELinux modes untranslated as they appear in the command line in English, however this string starts with the uppercase letter "P". We just wonder if this is used as descriptive or it refers exactly the "permissive" mode as shown in the terminal. Kind regards, Yuko Katabami </div> </body> </html> --------------000200000508080200080403--

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Announcing oVirt.js prototype
by Vojtech Szocs 17 Jun '14

17 Jun '14

------=_Part_23610907_1521630269.1403011303574 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hello everyone, in past few weeks, we've been working on JavaScript SDK for oVirt Engine. Today, I'm happy to announce the first prototype called oVirt.js :) Attached, there's an "sdk-testdrive" UI plugin which: - bundles oVirt.js prototype [ovirt.js] - contains test code for DataCenter object [plugin.js] To install this plugin, simply copy (or symlink) sdk-testdrive.json file and sdk-testdrive-resources directory under /usr/share/ovirt-engine/ui-plugins. Following is a quick recap of test code exercising oVirt.js. To add new DataCenter: // Obtain DataCenter resource collection. // Resource collection is a handle to work with RESTful objects. var dcColl = ovirt.api.datacenters; // Obtain "add DataCenter" operation. // Operation is a reusable, uhm, operation, backed by HTTP request. // You can run the same operation multiple times, if necessary. var addOp = dcColl.add({ name: 'test-dc', local: false }); // Register result handler and run the operation. addOp.success(dcAddedCallback).run(); // Example of operation result handler that receives a single resource. function dcAddedCallback (dc) { console.log('Added: ' + dc.data().name); } In dcAddedCallback function shown above, "dc" is a resource object, representing a handle to work with RESTful DataCenter object. It provides access to underlying resource data: var dcDataObj = dc.data(); // Get var dcName = dcDataObj.name; var dcDesc = dcDataObj.description; // Set multiple properties at once ... dc.data({ name: 'test-dc-updated', description: 'test' }); // ... or one by one dcDataObj.name = 'test-dc-updated'; dcDataObj.description = 'test'; It also gives access to nested collections (if any) and supported actions (if any): // Obtain Cluster resource collection for given DataCenter. var dcClusterColl = dc.clusters; oVirt.js is currently only 445 lines of code, yey :) we're not using any code generation at this point, we're simply relying on HATEOAS [1] principle of REST and dynamically augmenting resource objects with nested collections and supported actions, which are part of resource representation. [1] http://en.wikipedia.org/wiki/HATEOAS I feel we'll eventually come to a point where code generation can be useful, but for now, we're trying to keep things small and simple. oVirt.js currently uses Lo-Dash library [2] containing various utility functions. I think that Lo-Dash is great because it makes working with JavaScript a bit easier. [2] http://lodash.com/ Overall, oVirt.js will be self-contained, which means there will be no additional dependencies from JavaScript perspective. Using oVirt.js in HTML page will be as simple as this: <script src="ovirt.js"></script> This means that (build-time) dependencies such as Lo-Dash will be inlined into resulting oVirt.js build. We're also planning to provide minified version + Source Maps for better debugging. oVirt.js is planned to be usable NOT ONLY in web browsers. In fact, there's "ovirt.svc" namespace containing services used by oVirt.js API implementation. You (or any 3rd party extension) can override these services to achieve SDK portability for given runtime environment. In other words, I'd love to see oVirt.js used also with Node.js :) Finally, an important thing to mention - oVirt.js requires AT LEAST ECMAScript 5.1 compliant environment. All modern browsers support ES5, including IE9+. Unfortunately, IE9 doesn't support ES5 Strict Mode, but that's not that big of a deal. I'll send some more emails outlining implementation design and also how to manage source control & distribution of oVirt.js. 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[VDSM] [REVIEW] Profiling patches
by Nir Soffer 17 Jun '14

17 Jun '14

Hi all, I have few easy to review patches adding useful features to vdsm profiler. Please review: - http://gerrit.ovirt.org/27786 profile: Test profile decorator format - http://gerrit.ovirt.org/27787 profile: Support yappi builtins option - http://gerrit.ovirt.org/27816 profile: Support yappi clock types - http://gerrit.ovirt.org/27894 profile: Allow disabling threads when using the decorator Thanks, Nir

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Fwd: [libvirt] KVM Forum 2014 Call for Participation
by Brian Proffitt 16 Jun '14

16 Jun '14

----- Forwarded Message ----- From: "Paolo Bonzini" <pbonzini(a)redhat.com> To: "Libvirt" <libvir-list(a)redhat.com> Sent: Monday, June 16, 2014 12:08:22 PM Subject: [libvirt] KVM Forum 2014 Call for Participation ================================================================= KVM Forum 2014: Call For Participation October 14-16, 2014 - Congress Centre Düsseldorf - Düsseldorf, Germany (All submissions must be received before midnight July 27, 2014) ================================================================= KVM is an industry leading open source hypervisor that provides an ideal platform for datacenter virtualization, virtual desktop infrastructure, and cloud computing. Once again, it's time to bring together the community of developers and users that define the KVM ecosystem for our annual technical conference. We will discuss the current state of affairs and plan for the future of KVM, its surrounding infrastructure, and management tools. Mark your calendar and join us in advancing KVM. http://events.linuxfoundation.org/events/kvm-forum/ Once again we are colocated with the Linux Foundation's LinuxCon Europe, CloudOpen Europe, Embedded Linux Conference (ELC) Europe, and this year, the Linux Plumbers Conference. KVM Forum attendees will be able to attend LinuxCon + CloudOpen + ELC for a discounted rate. http://events.linuxfoundation.org/events/kvm-forum/attend/register We invite you to lead part of the discussion by submitting a speaking proposal for KVM Forum 2014. http://events.linuxfoundation.org/cfp Suggested topics: KVM/Kernel - Scaling and optimizations - Nested virtualization - Linux kernel performance improvements - Resource management (CPU, I/O, memory) - Hardening and security - VFIO: SR-IOV, GPU, platform device assignment - Architecture ports QEMU - Management interfaces: QOM and QMP - New devices, new boards, new architectures - Scaling and optimizations - Desktop virtualization and SPICE - Virtual GPU - virtio and vhost, including non-Linux or non-virtualized uses - Hardening and security - New storage features - Live migration and fault tolerance - High availability and continuous backup - Real-time guest support - Emulation and TCG - Firmware: ACPI, UEFI, coreboot, u-Boot, etc. - Testing Management and infrastructure - Managing KVM: Libvirt, OpenStack, oVirt, etc. - Storage: glusterfs, Ceph, etc. - Software defined networking: Open vSwitch, OpenDaylight, etc. - Network Function Virtualization - Security - Provisioning - Performance tuning =============== SUBMITTING YOUR PROPOSAL =============== Abstracts due: July 27, 2014 Please submit a short abstract (~150 words) describing your presentation proposal. Slots vary in length up to 45 minutes. Also include in your proposal the proposal type -- one of: - technical talk - end-user talk Submit your proposal here: http://events.linuxfoundation.org/cfp Please only use the categories "presentation" and "panel discussion" You will receive a notification whether or not your presentation proposal was accepted by Aug 20th. Speakers will receive a complimentary pass for the event. In the instance that your submission has multiple presenters, only the primary speaker for a proposal will receive a complementary event pass. For panel discussions, all panelists will receive a complimentary event pass. TECHNICAL TALKS A good technical talk should not just report on what has happened over the last year; it should present a concrete problem and how it impacts the user and/or developer community. Whenever applicable, it should focus on the work that needs to be done or the difficulties that haven't yet been solved. Summarizing recent developments is okay but it should not be more than a small portion of the overall talk. END-USER TALKS 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 KVM in production you are encouraged submit a speaking proposal. Simply mark it as an end-user talk. As an end user, this is a unique opportunity to get your input to developers. HANDS-ON / BOF SESSIONS We will reserve some time for people to get together and discuss strategic decisions as well as other topics that are best solved within smaller groups. This time can also be used for hands-on hacking sessions if you have concrete code problems to solve. These sessions will be announced during the event. If you are interested in organizing such a session, please add it to the list at http://www.linux-kvm.org/page/KVM_Forum_2014_BOF Let people you think might be interested know about it, and encourage them to add their names to the wiki page as well. Please try to add your ideas to the list before KVM Forum starts. PANEL DISCUSSIONS If you are proposing a panel discussion, please make sure that you list all of your potential panelists in your abstract. We will request full biographies if a panel is accepted. =============== HOTEL / TRAVEL =============== The KVM Forum 2014 will be held in Düsseldorf, Germany at Congress Centre Düsseldorf http://events.linuxfoundation.org/events/kvm-forum/attend/hotel-and-travel =============== IMPORTANT DATES =============== Notification: August 20, 2014 Schedule announced: August 29, 2014 Event dates: October 14-16, 2014 Thank you for your interest in KVM. We're looking forward to your submissions and seeing you at the KVM Forum 2014 in October! -your KVM Forum 2014 Program Committee Please contact us with any questions or comments. -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list

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Question/thoughts about our engine logging framework
by Yair Zaslavsky 16 Jun '14

16 Jun '14

Hi all, During my recent work on AAA, I was suggested by Juan Hernandez to use slf4j logging framework which serves as a facade for other logging frameworks (including java utils logging which is now used by jboss), log4j and others. I have accepted Juan's offer, and then when looking at our LogFactory class I have noticed we use commons logging. Several thoughts/questions - A. Why continue use our own wrapper as slf4j is already a facade. b. I think we should move cross java code to slf4j. What do you think on this point? Some reading material - http://javarevisited.blogspot.com.au/2013/08/why-use-sl4j-over-log4j-for-lo… http://stackoverflow.com/questions/3222895/what-is-the-issue-with-the-runti… Yair

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Say Hello to the oVirt Engine Virtual Appliance
by Fabian Deutsch 16 Jun '14

16 Jun '14

Hey, one of the things on the list for oVirt 3.5 was the oVirt Virtual Appliance. Huh, what’s that? You might ask. Well, imagine a cloud image with oVirt Engine 3.5 and it’s dependencies pre-installed, and a sane default answer file for ovirt-engine-setup. All of this delivered in an OVA file. The intention is to get you a running oVirt Engine without much hassle. Furthermore this appliance can be used in conjunction with - and is actually intended for - the Self Hosted Engine feature, and the upcoming oVirt Node Hosted Engine plugin. More informations and links about the appliance and how to build it can be found here: http://dummdida.tumblr.com/post/88944206100/say-hello-to-the-ovirt-engine-v… Testing it with hosted engine is the next step. Greetings fabian

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Call for Papers Deadline in One Week
by Brian Proffitt 15 Jun '14

15 Jun '14

Conference: Open World Forum 2014 Information: This year's program will show you how to take back control of your digital world, including IT/IS and (personal) data, whether you are a professional or not. Stop losing control and discover how Free and Open Source software may help you be more and more independent, whether technologically, legally or financially. Date: October 30-November 1, 2014 Location: Paris, France Website: http://openworldforum.org/ Call for Papers Deadline: June 22, 2014 Call for Papers URL: http://openworldforum.org/en/cfp/ -- Brian Proffitt oVirt Community Manager Project Atomic Community Lead Open Source and Standards, Red Hat - http://community.redhat.com Phone: +1 574 383 9BKP IRC: bkp @ OFTC

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Proposal: using Bootstrap CSS grids for layout
by Greg Sheremeta 13 Jun '14

13 Jun '14

Please review and discuss if you are interested. http://www.ovirt.org/Features/CSSGrids Thanks, Greg Greg Sheremeta Red Hat, Inc. Sr. Software Engineer, RHEV Cell: 919-807-1086 gshereme(a)redhat.com

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