------=_NextPart_000_0035_01CDC7DA.D69C0700 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Great to see interests. Laszlo Hornyak wrote on 2012-11-21:

Hi,

Interesting technology. Some questions: - There will be 1 and only one attestation server installed per ovirt instance or per trusted pool?

By far, I expect 1 and only one attestation server installed per ovirt instance. Maybe different ovirt instances can also shall attestation server, if all hosts under differenct ovirt instances are accessible by the attestation server and are able to access the attestation server.

- Could engine cache the data it received from the attestation server, or does it have to query each time a trusted VM needs to be started?

The basic case is query each time a trusted VM needs to be started, the advance case is engine cache the data with some practical cache invalidation timing/policy. The cache feature might also be able to be implemented inside the attestation server. Thanks Jimmy

Thank you, Laszlo

----- Original Message -----

...

From: "Gang Wei" <gang.wei@intel.com> To: engine-devel@ovirt.org Sent: Tuesday, November 20, 2012 2:06:09 PM Subject: [Engine-devel] Trusted Compute Pools

Hi,

I am an engineer working in Intel Open Source Technology Center, interested in integrating Intel initiated OpenAttestation(OAT) project (https://github.com/OpenAttestation/OpenAttestation.git) into oVirt to provide a way for Administrator to deploy VMs on trusted hosts hardened with H/W-based security features, such as Intel TXT.

I made a draft feature page for this: http://wiki.ovirt.org/wiki/Trusted_compute_pools

My draft idea is to provide trust_level requirement while doing vm creation like below:

curl -v -u "vdcadmin@qa.lab.tlv.redhat.com" -H "Content-type: application/xml" -d '<vm><name>my_new_vm</name> <cluster id="99408929-82cf-4dc7-a532-9d998063fa95" /> <template id="00000000-0000-0000-0000-000000000000"/> <trust_level>trusted</trust_level></vm>' 'http://10.35.1.1/rhevm-api/vms' Then oVirt Engine should query attestation server built with OAT via RESTful API to get all trusted hosts and select one to create the VM.

Attestation server performs host verification through following steps: 1. Hosts boot with Intel TXT technology enabled 2. The hosts' BIOS, hypervisor and OS are measured 3. These measured data is sent to Attestation server when challenged by attestation server 4. Attestation server verifies those measurements against good/known database to determine hosts' trustworthiness

Hosts need to be installed with OAT host agent to report host integrity to attestation server.

By far, I am still in process of getting familiar with oVirt code and not get solid idea yet on how the oVirt Engine should be modified to support this feature.

Any kind of comments or suggestions will be highly appreciated.

Thanks Gang (Jimmy) Wei

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Thanks a lot for such a detailed reply with good questions & =
suggestions.
Some comments below.

Jimmy

Itamar Heim wrote on=A02012-11-30:
> On 11/20/2012 08:06 AM, Wei, Gang wrote:
>> Hi,
>>=20
>> I am an engineer working in Intel Open Source Technology Center,
>> interested in integrating Intel initiated OpenAttestation(OAT) =
project
>> (https://github.com/OpenAttestation/OpenAttestation.git) into oVirt =
to
>> provide a way for Administrator to deploy VMs on trusted hosts =
hardened
>> with H/W-based security features, such as Intel TXT.
>>=20
>> I made a draft feature page for this:
>> http://wiki.ovirt.org/wiki/Trusted_compute_pools
>>=20
>> My draft idea is to provide trust_level requirement while doing vm
creation
>> like below:
>>=20
>> curl -v -u "vdcadmin@qa.lab.tlv.redhat.com"
>>      -H "Content-type: application/xml"
>>      -d '<vm><name>my_new_vm</name>
>> <cluster id=3D"99408929-82cf-4dc7-a532-9d998063fa95" />
>> <template id=3D"00000000-0000-0000-0000-000000000000"/>
>> <trust_level>trusted</trust_level></vm>'
>>      'http://10.35.1.1/rhevm-api/vms'
>> Then oVirt Engine should query attestation server built with OAT via
RESTful
>> API to get all trusted hosts and select one to create the VM.
>>=20
>> Attestation server performs host verification through following =
steps:
>> 1. Hosts boot with Intel TXT technology enabled
>> 2. The hosts' BIOS, hypervisor and OS are measured
>=20
> a feature page on collecting bios info was just posted, please review =
it
> for your needs: =
http://wiki.ovirt.org/wiki/Features/Design/HostBiosInfo
>=20
>> 3. These measured data is sent to Attestation server when challenged =
by
>> attestation server
>=20
> does this has to be live or can be cached?

This has to be live.

>> 4. Attestation server verifies those measurements against good/known
>> database to determine hosts' trustworthiness
>=20
> btw, you can do a uiplugin which adds a subtab or a field to an =
existing
> subtab so when standing on an intel host, user would see attestation
> status of the host from the attestation service.

Good suggestion.

>> Hosts need to be installed with OAT host agent to report host =
integrity
to
>> attestation server.
>=20
> iiuc, this has nothing to do with vdsm, so this would be a plugin to =
the
> new ovirt-host-deploy host bootstrap script to install this rpm on =
hosts?

Yes, it has nothing to do with vdsm by far. I will look into how to =
update
ovirt-host-deploy host bootstrap script to install it.

>> By far, I am still in process of getting familiar with oVirt code and =
not
>> get solid idea yet on how the oVirt Engine should be modified to =
support
>> this feature.
>>=20
>> Any kind of comments or suggestions will be highly appreciated.
>=20
> several questions (apologies if covered in the feature page, i'm =
offline)
>=20
> 1. is the attestation server open source and intended to be
>     packaged/deployed together with engine, or assumption is it is an
>     external service engine only needs to integrate with?
>     same question on anything needed to be deployed on host side.

Attestation server is open source, but it is expected to be deployed as =
a
separate service outside of ovirt engine. Ovirt engine need to integrate
with it. Host side need to deploy a host agent for attestation.

> 2. depending on first question - amount of configuration needed for
>     secure communication with the attestation service.

Yes.

I will think about your suggested approaches below throughout and then =
come
back to you.

> 3. I see two main approaches to implementing such a feature in engine
>     (regardless of the bundling/packaging/deployment aspects mentioned
>     above)
> a. fully integrated
> - adding a field to vm scheme with this field.
> - adding a set of config options for attestation service url and
>    authentication info
> - adding to RunVm command a method to check attestation aspects.
>=20
> b. pluggable
> - this would be somewhat like the custom hooks in vdsm
> - you would add a custom property to vm for this field (no need for db
> scheme change, just a config change for this custom property. if the
> plugin is packaged with ovirt, it could be a predefined one, so user
> does not need to do anything. if the plugin is optional, then the =
plugin
> will configure this config key as well at deployment.
> - you can use a uiplugin to make this custom property appear as a main
> field in the vm dialog, but i think a custom property can be a good
> enough start. we have feature which are only implemented as custom
> properties (i.e., advanced options).
> - you will add an engine plugin to do the check (engine plugins do not
> exist yet).
>=20
> more notes/thoughts:
> - Gilad is looking into making the scheduler pluggable and will send =
his
> thoughts on this. this means you could extend the scheduler with the
> check you want to do.
> - you can add a cluster level policy on allowed values for this field =
at
> vm level, this should also be possible via cluster level custom
> properties and plugins (when we'll have them).
> - should engine call attestation service for each host each time, or =
can
> just load a cache every X minutes for all hosts?
>=20
> since there are several options for the final approach, i suggest you
> start with a POC based on the simplest option and check it is working,
> then hopefully the other tangents will converge or will revisit the =
best
> solution.
>=20
> a POC patch would be a branch in your repo or the gerrit, flagged as =
WIP
> (work in progress) so it can be reviewed/commented/tested, but not
> merged till we revisit best approach for the feature (which may be to
> merge it and enhance at a later time as well, pending the other =
factors)
>=20
> the POC should allow you to have a working solution based on private
> builds from the branch to test the integration.
>=20
> for a POC patch i suggest: 1. use vm custom level property as simpler
> for first phase then changing the db scheme. 2. use bare minimum =
engine
> config support for service location/authentication. 3. assume no =
plugins
> and just add the code to the relevant part in RunVM which filters the
> relevant hosts:
>=20
> relevant logic is in this class:
> =
./backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/Vds=

> S elector.java
>=20
> the getVdsToRunOn[1] method has a loop to filter irrelevant hosts, =
then
> to choose the best host.
> sounds like you need to add a hostValidator which will call the class
> actually communicating with the attestation service (or hopefully, =
will
> check against the cache this class maintains).
>=20
> hope this makes things a bit more clearer on the available options.
>=20
> Thanks,
>     Itamar
> [1] private Guid getVdsToRunOn(Iterable<VDS> vdss, boolean isMigrate) =
{
>          StringBuilder sb =3D new StringBuilder();
>          final List<VDS> readyToRun =3D new ArrayList<VDS>();
>          for (VDS curVds : vdss) {
>              if (validateHostIsReadyToRun(curVds, sb, isMigrate) =
=3D=3D
> ValidationResult.VALID) {
>                  readyToRun.add(curVds);
>              }
>          }
> ...
>      }

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------=_NextPart_000_007C_01CDD026.A9326800--

----- Original Message -----

From: "Gang Wei" <gang.wei@intel.com> To: "Itamar Heim" <iheim@redhat.com> Cc: engine-devel@ovirt.org, "James Rankin" <jrankin@redhat.com>, "Oved Ourfalli" <oourfali@redhat.com>, "Barak Azulay" <bazulay@redhat.com>, "Michal Skrivanek" <mskrivan@redhat.com>, "Buddy Cao" <buddy.cao@intel.com>, "Jeff Ruby" <jeff.ruby@intel.com>, "Gang Wei" <gang.wei@intel.com> Sent: Tuesday, December 11, 2012 1:35:59 PM Subject: RE: [Engine-devel] Trusted Compute Pools

...

for a POC patch i suggest: 1. use vm custom level property as simpler for first phase then changing

Itamar Heim wrote on 2012-11-30: the db scheme.

...

2. use bare minimum engine config support for service location/authentication.

A dummy question: where is the engine config file?

The engine configuration is in the database, in the vdc_options table. You can edit it manually. In an installed environment we also have the engine-config utility, which allows to modify existing configuration entries. Oved

Jimmy

...

3. assume no plugins and just add the code to the relevant part in RunVM which filters the relevant hosts:

----- Original Message -----

From: "Itamar Heim" <iheim@redhat.com> To: "Gang Wei" <gang.wei@intel.com> Cc: engine-devel@ovirt.org Sent: Friday, February 8, 2013 2:02:41 PM Subject: Re: [Engine-devel] Trusted Compute Pools

On 01/02/2013 10:25, Wei, Gang wrote:

...

Design page updated according to in process Patchset 2. http://wiki.ovirt.org/wiki/Trusted_compute_pools.

Hi Wei,

in general, looks good.

currently, user who creates the VM can choose the value for this field. i wonder if it should be limited to web admin, and not exposed to power users (user portal) another way to think about this is do you want to set it at cluster policy level, and/or if you want to give a specific permission which is required to edit this field (then users with this permission can override the cluster policy maybe. all this can wait of course, and is not blocking the patch for basic functionality to get community feedback (but may be worth documenting as "open question / future thoughts" in the wiki.

two other thoughts/question 1. may be worth allowing to override the setting for this field in run-once dialog. 2. currently, the dialog allows to choose "run on trusted node" aren't the various values in TrustLevel enum relevant here for the user?

(nit: should probably s/node/Host/)

Thanks, Itamar

Agree on the cluster level use-case. Actually it may be more effective to move attestation decision to cluster level in general, so you will have an attested-cluster. Otherwise, you may have issues during migration and load balancing which may fail other functionalities in the system. Think of a use case where you want to upgrade the current hosts. If you have a mixture of attested on non-attested hosts you may have to take down a trusted VM since there's no suitable host for it. This will be easy when working in attested-cluster where all VMs are free to migrate as needed based on capacity only. If you choose to keep attestation in VM-level, please explain how do you plan to handle the cases I mentioned (migration, etc). Additionally I'll be glad to see a more detailed design with reference to the various parts- RESTful API, Engine and UI. Thanks! Doron

...

Jimmy

Wei, Gang wrote on 2012-11-20:

...

Hi,

I am an engineer working in Intel Open Source Technology Center, interested in integrating Intel initiated OpenAttestation(OAT) project (https://github.com/OpenAttestation/OpenAttestation.git) into oVirt to provide a way for Administrator to deploy VMs on trusted hosts hardened with H/W-based security features, such as Intel TXT.

I made a draft feature page for this: http://wiki.ovirt.org/wiki/Trusted_compute_pools

My draft idea is to provide trust_level requirement while doing vm creation like below:

curl -v -u "vdcadmin@qa.lab.tlv.redhat.com" -H "Content-type: application/xml" -d '<vm><name>my_new_vm</name> <cluster id="99408929-82cf-4dc7-a532-9d998063fa95" /> <template id="00000000-0000-0000-0000-000000000000"/> <trust_level>trusted</trust_level></vm>' 'http://10.35.1.1/rhevm-api/vms' Then oVirt Engine should query attestation server built with OAT via RESTful API to get all trusted hosts and select one to create the VM.

Attestation server performs host verification through following steps: 1. Hosts boot with Intel TXT technology enabled 2. The hosts' BIOS, hypervisor and OS are measured 3. These measured data is sent to Attestation server when challenged by attestation server 4. Attestation server verifies those measurements against good/known database to determine hosts' trustworthiness

Hosts need to be installed with OAT host agent to report host integrity to attestation server.

By far, I am still in process of getting familiar with oVirt code and not get solid idea yet on how the oVirt Engine should be modified to support this feature.

Any kind of comments or suggestions will be highly appreciated.

Thanks Gang (Jimmy) Wei

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