[ovirt-users] Proper way to change and persist vdsm configuration options
Alon Bar-Lev
alonbl at redhat.com
Wed Aug 6 04:32:33 UTC 2014
----- Original Message -----
> From: "Trey Dockendorf" <treydock at gmail.com>
> To: "Alon Bar-Lev" <alonbl at redhat.com>
> Cc: "ybronhei" <ybronhei at redhat.com>, "users" <users at ovirt.org>, "Fabian Deutsch" <fabiand at redhat.com>, "Dan
> Kenigsberg" <danken at redhat.com>, "Itamar Heim" <iheim at redhat.com>, "Douglas Landgraf" <dougsland at redhat.com>, "Oved
> Ourfali" <ovedo at 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 at redhat.com> wrote:
> >
> >
> > ----- Original Message -----
> >> From: "Trey Dockendorf" <treydock at gmail.com>
> >> To: "Alon Bar-Lev" <alonbl at redhat.com>
> >> Cc: "ybronhei" <ybronhei at redhat.com>, "users" <users at ovirt.org>, "Fabian
> >> Deutsch" <fabiand at redhat.com>, "Dan
> >> Kenigsberg" <danken at redhat.com>, "Itamar Heim" <iheim at redhat.com>,
> >> "Douglas Landgraf" <dougsland at redhat.com>, "Oved
> >> Ourfali" <ovedo at 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 at redhat.com> wrote:
> >> >
> >> >
> >> > ----- Original Message -----
> >> >> From: "Trey Dockendorf" <treydock at gmail.com>
> >> >> To: "Alon Bar-Lev" <alonbl at redhat.com>
> >> >> Cc: "ybronhei" <ybronhei at redhat.com>, "users" <users at ovirt.org>,
> >> >> "Fabian
> >> >> Deutsch" <fabiand at redhat.com>, "Dan
> >> >> Kenigsberg" <danken at redhat.com>, "Itamar Heim" <iheim at redhat.com>,
> >> >> "Douglas Landgraf" <dougsland at 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 at 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 at redhat.com> wrote:
> >> >> >
> >> >> >
> >> >> > ----- Original Message -----
> >> >> >> From: "Trey Dockendorf" <treydock at gmail.com>
> >> >> >> To: "ybronhei" <ybronhei at redhat.com>
> >> >> >> Cc: "users" <users at ovirt.org>, "Fabian Deutsch"
> >> >> >> <fabiand at redhat.com>,
> >> >> >> "Dan
> >> >> >> Kenigsberg" <danken at redhat.com>, "Itamar
> >> >> >> Heim" <iheim at redhat.com>, "Douglas Landgraf" <dougsland at redhat.com>,
> >> >> >> "Alon
> >> >> >> Bar-Lev" <alonbl at 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 at 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 at 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 at ovirt.org
> >> >> >> >>>> http://lists.ovirt.org/mailman/listinfo/users
> >> >> >> >>>>
> >> >> >> >>>>
> >> >> >> >>>
> >> >> >> >>> --
> >> >> >> >>> Yaniv Bronhaim.
> >> >> >> >>>
> >> >> >> >>
> >> >> >> >
> >> >> >>
> >> >>
> >>
>
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