[Engine-devel] minutes for sync up on Open Attestation integration with oVirt in 4/9

[Oved Ourfalli]

----- Original Message -----
> From: "Wei D Chen" <wei.d.chen at intel.com>
> To: "Doron Fediuck" <dfediuck at redhat.com>, "Ofri Masad" <omasad at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Monday, April 15, 2013 8:54:18 AM
> Subject: Re: [Engine-devel] minutes for sync up on Open Attestation integration with oVirt in 4/9
> 
> Hi Doron and Ofri,
> 
> Thanks for your reply, here is some other question.
> 
> ii.  When adding a host into the trusted cluster, the host will be attested
> via OAT service, only trusted hosted can be added.
> 
> Would you also kindly tell me if there is any mandatory logic check when
> adding a host into a cluster, so we can also put attestation logic with
> these mandatory check together? Some example or code location is better.
> Thanks a lot.
> 

I think there are two approaches, depending on the use case.
#1:
If the host trusted property is static, then you can narrow the tests to two locations:
* AddVdsCommand - (Vds = Host) - This command is triggered when a new host is added to the system. You can use the canDoAction method (which we have on all commands, and it determines whether an action can be run or not), and there, if cluster requires trusted hosts only, you can test whether this host is trusted or not.
* ChangeVdsClusterCommand - this command is used when you change the cluster of a host. So, if the target cluster requires tursted hosts, you can do a similar test in its canDoAction method.

#2:
If the host trusted property can change, then I'd suggest using the NonOperational property of a host.
We have a class called VdsUpdateRunTimeInfo that does periodic tests of hosts, deciding what's their status, according to specific flags.
The code there is quite complex, and would require refactoring at some point, but in the meantime you can use the MonitoringStrategy interface that is being used there, and implement a new monitoring strategy for Open Attestation.

There, in the processHardwareCapabilities, you can test that the host is trusted.

When creating the strategy, using the MonitoringStrategyFactory, you'll need to create the appropriate strategy.
Currently we support either virt strategy or gluster strategy or both. In your case you would need virt+attestation / gluster+attestation / virt+gluster+attestation, according to the services deployed on the cluster.


Does that make sense?
Doron and Ofri, what did you have in mind for this feature?

Regards,
Oved

> 
> Best Regards,
> Dave Chen
> 
> 
> -----Original Message-----
> From: Doron Fediuck [mailto:dfediuck at redhat.com]
> Sent: Wednesday, April 10, 2013 8:03 PM
> To: Ofri Masad
> Cc: Wei, Gang; Chen, Wei D; Cao, Buddy; Zhang, Lijuan
> Subject: Re: minutes for sync up on Open Attestation integration with oVirt
> in 4/9
> 
> 
> 
> ----- Original Message -----
> > From: "Ofri Masad" <omasad at redhat.com>
> > To: "Gang Wei" <gang.wei at intel.com>
> > Cc: "Wei D Chen" <wei.d.chen at intel.com>, "Buddy Cao"
> > <buddy.cao at intel.com>, "Lijuan Zhang" <lijuan.zhang at intel.com>, "Doron
> > Fediuck" <dfediuck at redhat.com>
> > Sent: Wednesday, April 10, 2013 2:23:57 PM
> > Subject: Re: minutes for sync up on Open Attestation integration with
> > oVirt in 4/9
> > 
> > Hi,
> > 
> > answers inside the mail body.
> > 
> > ----- Original Message -----
> > > From: "Doron Fediuck" <dfediuck at redhat.com>
> > > To: "Wei D Chen" <wei.d.chen at intel.com>
> > > Cc: "Gang Wei" <gang.wei at intel.com>, "Buddy Cao"
> > > <buddy.cao at intel.com>, "Lijuan Zhang" <lijuan.zhang at intel.com>,
> > > "Ofri Masad" <omasad at redhat.com>
> > > Sent: Wednesday, April 10, 2013 12:12:26 PM
> > > Subject: Re: minutes for sync up on Open Attestation integration
> > > with oVirt in 4/9
> > > 
> > > Hi Dave,
> > > Adding Ofri to answer your questions.
> > > 
> > > ----- Original Message -----
> > > > From: "Wei D Chen" <wei.d.chen at intel.com>
> > > > To: "Gang Wei" <gang.wei at intel.com>, "Doron Fediuck"
> > > > <dfediuck at redhat.com>,
> > > > "Buddy Cao" <buddy.cao at intel.com>, "Lijuan Zhang"
> > > > <lijuan.zhang at intel.com>
> > > > Sent: Wednesday, April 10, 2013 6:31:05 AM
> > > > Subject: RE: minutes for sync up on Open Attestation integration
> > > > with oVirt in 4/9
> > > > 
> > > > Hi Doron,
> > > > 
> > > > 
> > > > iii.    Then periodic trust check will be added into background process
> > > > for
> > > > all existing hosts, once becoming non-trusted, mark it as
> > > > non-operational.
> > > > 
> > > > -          [Dave] Would you give me some details about the “background
> > > > process” mentioned in our sync up meeting? What’s the process and
> > > > where is related code?
> > > > 
> > 
> > The use Quartz Job to scheduled background processes.
> > An example can be found in:
> > ovirt-engine/backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/Backend.java(Line:
> > 222)
> > 
> > This code calls a method that is located in:
> > ovirt-engine/backend/manager/modules/bll/src/main/java/org/ovirt/engin
> > e/core/bll/quota/QuotaManager.java
> > (Line: 1000)
> > the @OnTimerMethodAnnotation annotation and the unique job name
> > connects the two in runtime.
> > 
> > The job can query the attestation server for all the host and then set
> > untrusted hosts to Non-Operational.
> > the best way would be to call SetNonOperationalVdsCommand with a new
> > NonOperationalReason.
> > This command tries to migrate all VMs from the host and then set it
> > non operational.
> > (We need to think about non-migrational VMs - should we close those
> > VMs or keep the host running)
> > 
> 
> One more thing you may want to consider; If we get a positive response for a
> host which is currently non-operational, issue an activate command to try
> and make it operational again.
> Alternatively, you may decide not to handle it, assuming untrusted hosts can
> only be activated manually (see below Ofri's response on activating a host).
> 
> > > > 
> > > > iv.     If admin fixed the non-operational node and try to switch it to
> > > > operational mode again, a trust check will happen to gate the
> > > > switching.
> > > > 
> > > > -          [Dave] If there is a button provided from UI  for checking
> > > > the
> > > > logic? or we need add an extra-button for attestation check only?
> > > > 
> > 
> > In the UI we already have the "Activate" option. What still needs to
> > be added is the check with the attestation provider to make sure that
> > if the cluster is defined 'Trusted'. If so, only trusted host will
> > succeed in the activate command (and, of course, a proper Audit Log
> > error in case the host failed to activate due to trust issue.
> > 
> > the correct place to add this check would be in:
> > ovirt-engine/backend/manager/modules/vdsbroker/src/main/java/org/ovirt
> > /engine/core/vdsbroker/VdsManager.java:activate()
> > this is where the re-activation process begins.
> > 
> > > > 
> > > > Thanks very much.
> > > > 
> > > > 
> > > > 
> > > > Best Regards,
> > > > Dave Chen
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