I likely won't automate this yet, as a lot of what's coming in 3.5 seems to obsolete many things I was doing previously via Puppet. In particular the Foreman integration and the ability to add custom iptables rules to engine-config. Previous posts on the list made is seem like modifying "IPTables" could potentially make upgrades less reliable. Created a gist of a working series of commands based on Alon's example using the Host Deploy Protocol [1]. https://gist.github.com/treydock/570a776b5c160bca7c9c Curious , where is the public key used by the ovirt-engine stored? The one that is available using command=get-ssh-trust. Is there a way to query it from the engine? I'm thinking if it would be possible to create a custom Facter face that stores the value of that public key so easier to re-use and access for deployment. Thanks, - Trey [1] - http://www.ovirt.org/Features/HostDeployProtocol On Tue, Aug 5, 2014 at 11:32 PM, Alon Bar-Lev <alonbl@redhat.com> wrote:
----- Original Message -----
From: "Trey Dockendorf" <treydock@gmail.com> To: "Alon Bar-Lev" <alonbl@redhat.com> Cc: "ybronhei" <ybronhei@redhat.com>, "users" <users@ovirt.org>, "Fabian Deutsch" <fabiand@redhat.com>, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com>, "Douglas Landgraf" <dougsland@redhat.com>, "Oved Ourfali" <ovedo@redhat.com> Sent: Tuesday, August 5, 2014 11:27:45 PM Subject: Re: [ovirt-users] Proper way to change and persist vdsm configuration options
Thanks for clarifying, makes sense now.
The public key trust needed for registration, is that the same key that would be used when adding host via UI?
yes.
you can download it via: $ curl 'http://engine/ovirt-engine/services/pki-resource?resource=engine-certificate&format=OPENSSH-PUBKEY' $ curl 'http://engine/ovirt-engine/services/host-register?version=1&command=get-ssh-trust'
probably better to use https and verify CA certificate fingerprint if you do that from host.
Any examples of how to use the HostDeployProtocol [1]? I like the idea of using registration but haven't the slightest idea how to implement what's described in the docs [1]. I do recall seeing an article posted (searching email and can't find) that had a nice walk-through of how to use the oVirt API using browser tools. I'm unsure if this HostDeployProtocol would be done that way or via some other method.
there are two apis, the formal rest-api that is exposed by the engine and can be accessed using any rest api tool or ovirt-engine-cli, ovirt-engine-sdk-java, ovirt-engine-sdk-python wrappers. I sent you a minimal example in previous message.
and the host-deploy protocol[1], which should have been exposed in the rest-api, but for some reason I cannot understand it was not included in the public interface of the engine.
the advantage of using the rest-api is that you can achieve full cycle using the protocol, the add host cycle is what you seek.
the host-deploy protocol just register the host, but the sysadmin needs to approve the host via the ui (or via the rest api) before it is usable.
Thanks, - Trey
[1] http://www.ovirt.org/Features/HostDeployProtocol
On Tue, Aug 5, 2014 at 3:01 PM, Alon Bar-Lev <alonbl@redhat.com> wrote:
----- Original Message -----
From: "Trey Dockendorf" <treydock@gmail.com> To: "Alon Bar-Lev" <alonbl@redhat.com> Cc: "ybronhei" <ybronhei@redhat.com>, "users" <users@ovirt.org>, "Fabian Deutsch" <fabiand@redhat.com>, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com>, "Douglas Landgraf" <dougsland@redhat.com>, "Oved Ourfali" <ovedo@redhat.com> Sent: Tuesday, August 5, 2014 10:45:12 PM Subject: Re: [ovirt-users] Proper way to change and persist vdsm configuration options
Excellent, so installing 'ovirt-host-deploy' on each node then configuring the /etc/ovirt-host-deploy.conf.d files seems very automate-able, will see how it works in practice.
you do not need to install the ovirt-host-deploy, just create the files.
Regarding the actual host registration and getting the host added to ovirt-engine, are there other methods besides the API and the sdk? Would it be possible to configure the necessary ovirt-host-deploy.conf.d files then execute "ovirt-host-deploy"? I notice that running 'ovirt-host-deploy' wants to make whatever host executes it a ovir hypervisor but haven't yet run it all the way through as no server to test with at this time. There seems to be no "--help" or similar command line argument.
you should not run host-deploy directly, but via the engine's process, either registration or add host as I replied previously.
when base system is ready, you issue add host via api of engine or via ui, the other alternative is to register the host host the host-deploy protocol, and approve the host via api of engine or via ui.
I'm sure this will all be more clear once I attempt the steps and run through the motions. Will try to find a system to test on so I'm ready once our new servers arrive.
Thanks, - Trey
On Tue, Aug 5, 2014 at 2:23 PM, Alon Bar-Lev <alonbl@redhat.com> wrote:
----- Original Message -----
From: "Trey Dockendorf" <treydock@gmail.com> To: "Alon Bar-Lev" <alonbl@redhat.com> Cc: "ybronhei" <ybronhei@redhat.com>, "users" <users@ovirt.org>, "Fabian Deutsch" <fabiand@redhat.com>, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com>, "Douglas Landgraf" <dougsland@redhat.com> Sent: Tuesday, August 5, 2014 10:01:14 PM Subject: Re: [ovirt-users] Proper way to change and persist vdsm configuration options
Ah, thank you for the input! Just so I'm not spending time implementing the wrong changes, let me confirm I understand your comments.
1) Deploy host with Foreman 2) Apply Puppet catalog including ovirt Puppet module 3) Initiate host-deploy via rest API
In the ovirt module the following takes place:
2a) Add yum repos 2b) Manage /etc/ovirt-host-deploy.conf.d/40-xxx.conf
you can have any # of files with any prefix :))
For #2b I have a few questions
* The name of the ".conf" file is simply for sorting and labeling/organization, it has not functional impact on what those overrides apply to?
right.
* That file is managed on the ovirt-engine server, not the actual nodes?
currently on the host, in future we will provide a method to add this to engine database[1]
[1] http://gerrit.ovirt.org/#/c/27064/
* Is there any way to apply overrides to specific hosts? For example if I have some hosts that require a config and others that don't, how would I separate those *.conf files? This is more theoretical as right now my setup is common across all nodes.
the poppet module can put whatever required on each host.
For #3...the implementation of API calls from within Puppet is a challenge and one I can't tackle yet, but definitely will make it a goal for the future. In the mean time, what's the "manual" way to initiate host-deploy? Is there a CLI command that would have the same result as an API call or is the recommended way to perform the API call manually (ie curl)?
well, you can register host using the following protocol[1], but it is difficult to do this securely, what you actually need is to establish ssh trust for root with engine key then register.
you can also use the register command using curl by something like (I have not checked): https://admin%40internal:password@engine/ovirt-engine/api/hosts --- <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <host> <name>host1</name> <address>dns</address> <ssh> <authentication_method>publickey</authentication_method> </ssh> <cluster id="cluster-uuid"/> </host> ---
you can also use the ovirt-engine-sdk-python package: --- import ovirtsdk.api import ovirtsdk.xml
sdk = ovirtsdk.api.API( url='https://host/ovirt-engine/api', username='admin@internal', password='password', insecure=True, ) sdk.hosts.add( ovirtsdk.xml.params.Host( name='host1', address='host1', cluster=engine_api.clusters.get( 'cluster' ), ssh=self._ovirtsdk_xml.params.SSH( authentication_method='publickey', ), ) ) ---
[1] http://www.ovirt.org/Features/HostDeployProtocol
Thanks! - Trey
On Tue, Aug 5, 2014 at 1:45 PM, Alon Bar-Lev <alonbl@redhat.com> wrote: > > > ----- Original Message ----- >> From: "Trey Dockendorf" <treydock@gmail.com> >> To: "ybronhei" <ybronhei@redhat.com> >> Cc: "users" <users@ovirt.org>, "Fabian Deutsch" >> <fabiand@redhat.com>, >> "Dan >> Kenigsberg" <danken@redhat.com>, "Itamar >> Heim" <iheim@redhat.com>, "Douglas Landgraf" <dougsland@redhat.com>, >> "Alon >> Bar-Lev" <alonbl@redhat.com> >> Sent: Tuesday, August 5, 2014 9:36:24 PM >> Subject: Re: [ovirt-users] Proper way to change and persist vdsm >> configuration options >> >> On Tue, Aug 5, 2014 at 12:32 PM, ybronhei <ybronhei@redhat.com> >> wrote: >> > Hey, >> > >> > Just noticed something that I forgot about.. >> > before filing new BZ, see in ovirt-host-deploy README.environment >> > [1] >> > the >> > section: >> > VDSM/configOverride(bool) [True] >> > Override vdsm configuration file. >> > >> > changing it to false will keep your vdsm.conf file as is after >> > deploying >> > the >> > host again (what happens after node upgrade) >> > >> > [1] >> > https://github.com/oVirt/ovirt-host-deploy/blob/master/README.environment >> > >> > please check if that what you meant.. >> > >> > Thanks, >> > Yaniv Bronhaim. >> > >> >> I was unaware of that package. I will check that out as that seems >> to >> be what I am looking for. >> >> I have not filed this in BZ and will hold off pending >> ovirt-host-deploy. If you feel a BZ is still necessary then please >> do >> file one and I would be happy to provide input if it would help. >> >> Right now this is my workflow. >> >> 1. Foreman provisions bare-metal server with CentOS 6.5 >> 2. Once provisioned and system rebooted Puppet applies puppet-ovirt >> [1] module that adds the necessary yum repos > > and should stop here.. > >> , and installs packages. >> Part of my Puppet deployment is basic things like sudo management >> (vdsm's sudo is account for), sssd configuration, and other aspects >> that are needed by every system in my infrastructure. Part of the >> ovirt::node Puppet class is managing vdsm.conf, and in my case that >> means ensuring iSER is enabled for iSCSI over IB. > > you can create a file /etc/ovirt-host-deploy.conf.d/40-xxx.conf > --- > VDSM_CONFIG/section/key=str:content > --- > > this will create a proper vdsm.conf when host-deploy is initiated. > > you should now use the rest api to initiate host-deploy. > >> 3. Once host is online and has had the full Puppet catalog applied I >> log into ovirt-engine web interface and add those host (pulling it's >> data via the Foreman provider). > > right, but you should let this process install packages and manage > configuration. > >> What I've noticed is that after step #3, after a host is added by >> ovirt-engine, the vdsm.conf file is reset to default and I have to >> reapply Puppet before it can be used as the one of my Data Storage >> Domains requires iSER (not available over TCP). > > right, see above. > >> What would be the workflow using ovirt-host-deploy? Thus far I've >> had >> to piece together my workflow based on the documentation and filling >> in blanks where possible since I do require customizations to >> vdsm.conf and the documented workflow of adding a host via web UI >> does >> not allow for such customization. >> >> Thanks, >> - Trey >> >> [1] - https://github.com/treydock/puppet-ovirt (README not fully >> updated as still working out how to use Puppet with oVirt) >> >> > >> > On 08/05/2014 08:12 AM, Trey Dockendorf wrote: >> >> >> >> I'll file BZ. As far as I can recall this has been an issue >> >> since >> >> 3.3.x >> >> as >> >> I have been using Puppet to modify values and have had to rerun >> >> Puppet >> >> after installing a node via GUI and when performing update from >> >> GUI. >> >> Given >> >> that it has occurred when VDSM version didn't change on the node >> >> it >> >> seems >> >> likely to be something being done by Python code that bootstraps >> >> a >> >> node >> >> and >> >> performs the other tasks. I won't have any systems available to >> >> test >> >> with >> >> for a few days. New hardware specifically for our oVirt >> >> deployment >> >> is >> >> on >> >> order so should be able to more thoroughly debug and capture logs >> >> at >> >> that >> >> time. >> >> >> >> Would using vdsm-reg be a better solution for adding new nodes? >> >> I >> >> only >> >> tried using vdsm-reg once and it went very poorly...lots of >> >> missing >> >> dependencies not pulled in from yum install I had to install >> >> manually >> >> via >> >> yum. Then the node was auto added to newest cluster with no >> >> ability >> >> to >> >> change the cluster. Be happy to debug that too if there's some >> >> docs >> >> that >> >> outline the expected behavior. >> >> >> >> Using vdsm-reg or something similar seems like a better fit for >> >> puppet >> >> deployed nodes, as opposed to requiring GUI steps to add the >> >> node. >> >> >> >> Thanks >> >> - Trey >> >> On Aug 4, 2014 5:53 AM, "ybronhei" <ybronhei@redhat.com> wrote: >> >> >> >>> On 07/31/2014 01:28 AM, Trey Dockendorf wrote: >> >>> >> >>>> I'm running ovirt nodes that are stock CentOS 6.5 systems with >> >>>> VDSM >> >>>> installed. I am using iSER to do iSCSI over RDMA and to make >> >>>> that >> >>>> work I have to modify /etc/vdsm/vdsm.conf to include the >> >>>> following: >> >>>> >> >>>> [irs] >> >>>> iscsi_default_ifaces = iser,default >> >>>> >> >>>> I've noticed that any time I upgrade a node from the engine web >> >>>> interface that changes to vdsm.conf are wiped out. I don't >> >>>> know >> >>>> if >> >>>> this is being done by the configuration code or by the vdsm >> >>>> package. >> >>>> Is there a more reliable way to ensure changes to vdsm.conf are >> >>>> NOT >> >>>> removed automatically? >> >>>> >> >>> >> >>> Hey, >> >>> >> >>> vdsm.conf shouldn't wiped out and shouldn't changed at all >> >>> during >> >>> upgrade. >> >>> other related conf files (such as libvirtd.conf) might be >> >>> overrided >> >>> to >> >>> keep >> >>> defaults configurations for vdsm. but vdsm.conf should persist >> >>> with >> >>> user's >> >>> modification. from my check, regular yum upgrade doesn't touch >> >>> vdsm.conf >> >>> >> >>> Douglas can you verify that with node upgrade? might be specific >> >>> to >> >>> that >> >>> flow.. >> >>> >> >>> Trey, can file a bugzilla on that and describe your steps there? >> >>> >> >>> Thanks >> >>> >> >>> Yaniv Bronhaim, >> >>> >> >>>> >> >>>> Thanks, >> >>>> - Trey >> >>>> _______________________________________________ >> >>>> Users mailing list >> >>>> Users@ovirt.org >> >>>> http://lists.ovirt.org/mailman/listinfo/users >> >>>> >> >>>> >> >>> >> >>> -- >> >>> Yaniv Bronhaim. >> >>> >> >> >> > >>