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<title>openstack/kolla-ansible.git/doc/source/reference/compute/libvirt-guide.rst, branch stable/2024.1</title>
<subtitle>Unnamed repository; edit this file 'description' to name the repository.
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<id>https://git.platform-os.org/openstack/kolla-ansible.git/atom?h=stable%2F2024.1</id>
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<link rel='alternate' type='text/html' href='https://git.platform-os.org/openstack/kolla-ansible.git/'/>
<updated>2023-02-03T09:55:29+00:00</updated>
<entry>
<title>docs: fix information about libvirt SASL auth</title>
<updated>2023-02-03T09:55:29+00:00</updated>
<author>
<name>Pierre Riteau</name>
<email>pierre@stackhpc.com</email>
</author>
<published>2023-02-03T09:55:29+00:00</published>
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<id>urn:sha1:cbf6ce640a10414492a10584be1b537c6a510257</id>
<content type='text'>
Change-Id: I0ff303a2fad2edbcedbe88486b272d2efa765d8d
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</entry>
<entry>
<title>docs: Fix reference to Libvirt TLS</title>
<updated>2022-12-06T10:39:23+00:00</updated>
<author>
<name>Pierre Riteau</name>
<email>pierre@stackhpc.com</email>
</author>
<published>2022-12-06T10:39:23+00:00</published>
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<id>urn:sha1:ce28cbc0d8bd907982212f4963b3a3e48215f688</id>
<content type='text'>
Change-Id: I2df1eff4e9eda42127db5b0bfed4f84b6955c763
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</entry>
<entry>
<title>Adds a wrapper script to run ovs-vsctl commands in the container</title>
<updated>2022-11-15T10:16:02+00:00</updated>
<author>
<name>Will Szumski</name>
<email>will@stackhpc.com</email>
</author>
<published>2022-11-03T15:53:32+00:00</published>
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<id>urn:sha1:a82443481e17edecda728f8698f8b401ec910546</id>
<content type='text'>
Libvirt needs to be able to plug ports into openvswitch bridges.
It does this using the ovs-vsctl command, which it searches for
in $PATH[1, 2]. This change will optionally install a wrapper
script that executes the ovs-vsctl commands in the context of the
openvswitchd container. This is useful when running libvirt on the
host whilst still running openvswitch in a container. The advantage
of this method over install the packages on the host is that it
ensures client compatability with the daemon. The default is set
to false as the wrapper could overwrite ovs-vsctl installed on the
host.

[1] https://github.com/libvirt/libvirt/blob/ee51ab86c2e52b6ff1b17a4c7ad11439fd610c9e/src/util/virnetdevopenvswitch.c#L59
[2] https://github.com/libvirt/libvirt/blob/a89b17c2a75cfbaeb9e430f88e0f8a7475eb4f54/docs/kbase/internals/command.rst#id3

Closes-Bug: #1995409
Change-Id: Iaa6bfb012ae847f5f6aa0a1fc1c27970ac265f93
</content>
</entry>
<entry>
<title>Merge "docs: add information about development libvirt TLS certs"</title>
<updated>2022-05-30T13:36:36+00:00</updated>
<author>
<name>Zuul</name>
<email>zuul@review.opendev.org</email>
</author>
<published>2022-05-30T13:36:36+00:00</published>
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<id>urn:sha1:28b4c5d35c2891e338a2f54ef11144d59f64dcf3</id>
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</entry>
<entry>
<title>libvirt: add nova-libvirt-cleanup command</title>
<updated>2022-03-21T11:54:54+00:00</updated>
<author>
<name>Mark Goddard</name>
<email>mark@stackhpc.com</email>
</author>
<published>2022-02-14T11:56:50+00:00</published>
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<id>urn:sha1:80b311bef73ee8469055ae6f0b6083991a61b02a</id>
<content type='text'>
Change Ia1239069ccee39416b20959cbabad962c56693cf added support for
running a libvirt daemon on the host, rather than using the nova_libvirt
container. It did not cover migration of existing hosts from using a
container to using a host daemon.

This change adds a kolla-ansible nova-libvirt-cleanup command which may
be used to clean up the nova_libvirt container, volumes and related
items on hosts, once it has been disabled.

The playbook assumes that compute hosts have been emptied of VMs before
it runs. A future extension could support migration of existing VMs, but
this is currently out of scope.

Change-Id: I46854ed7eaf1d5b5e3ccd8531c963427848bdc99
</content>
</entry>
<entry>
<title>libvirt: make it possible to run libvirt on the host</title>
<updated>2022-03-21T11:54:31+00:00</updated>
<author>
<name>Mark Goddard</name>
<email>mark@stackhpc.com</email>
</author>
<published>2022-01-19T13:21:17+00:00</published>
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<id>urn:sha1:4e41acd8f0ccc8dee432f72cfafcca16d01a11b7</id>
<content type='text'>
In some cases it may be desirable to run the libvirt daemon on the host.
For example, when mixing host and container OS distributions or
versions.

This change makes it possible to disable the nova_libvirt container, by
setting enable_nova_libvirt_container to false. The default values of
some Docker mounts and other paths have been updated to point to default
host directories rather than Docker volumes when using a host libvirt
daemon.

This change does not handle migration of existing systems from using
a nova_libvirt container to libvirt on the host.

Depends-On: https://review.opendev.org/c/openstack/ansible-collection-kolla/+/830504

Change-Id: Ia1239069ccee39416b20959cbabad962c56693cf
</content>
</entry>
<entry>
<title>libvirt: support SASL authentication</title>
<updated>2022-03-10T16:57:16+00:00</updated>
<author>
<name>Mark Goddard</name>
<email>mark@stackhpc.com</email>
</author>
<published>2022-03-04T17:57:24+00:00</published>
<link rel='alternate' type='text/html' href='https://git.platform-os.org/openstack/kolla-ansible.git/commit/?id=d2d4b53d47df3b1a250c21404a8ec140873d4ce5'/>
<id>urn:sha1:d2d4b53d47df3b1a250c21404a8ec140873d4ce5</id>
<content type='text'>
In Kolla Ansible OpenStack deployments, by default, libvirt is
configured to allow read-write access via an unauthenticated,
unencrypted TCP connection, using the internal API network.  This is to
facilitate migration between hosts.

By default, Kolla Ansible does not use encryption for services on the
internal network (and did not support it until Ussuri). However, most
other services on the internal network are at least authenticated
(usually via passwords), ensuring that they cannot be used by anyone
with access to the network, unless they have credentials.

The main issue here is the lack of authentication. Any client with
access to the internal network is able to connect to the libvirt TCP
port and make arbitrary changes to the hypervisor. This could include
starting a VM, modifying an existing VM, etc. Given the flexibility of
the domain options, it could be seen as equivalent to having root access
to the hypervisor.

Kolla Ansible supports libvirt TLS [1] since the Train release, using
client and server certificates for mutual authentication and encryption.
However, this feature is not enabled by default, and requires
certificates to be generated for each compute host.

This change adds support for libvirt SASL authentication, and enables it
by default. This provides base level of security. Deployments requiring
further security should use libvirt TLS.

[1] https://docs.openstack.org/kolla-ansible/latest/reference/compute/libvirt-guide.html#libvirt-tls

Depends-On: https://review.opendev.org/c/openstack/kolla/+/833021
Closes-Bug: #1964013
Change-Id: Ia91ceeb609e4cdb144433122b443028c0278b71e
</content>
</entry>
<entry>
<title>docs: add information about development libvirt TLS certs</title>
<updated>2022-02-11T09:57:20+00:00</updated>
<author>
<name>Mark Goddard</name>
<email>mark@stackhpc.com</email>
</author>
<published>2022-02-10T17:22:42+00:00</published>
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<id>urn:sha1:f853b323fa90c8f25e29f65bb329571041b58523</id>
<content type='text'>
Adds docs for I1bde9fa018f66037aec82dc74c61ad1f477a7c12.

Change-Id: I88a07bb3bfeb0c98bea9dbe8674033208ec3fb9f
</content>
</entry>
<entry>
<title>Docs: improve Nova documentation</title>
<updated>2019-10-08T08:30:35+00:00</updated>
<author>
<name>Mark Goddard</name>
<email>mark@stackhpc.com</email>
</author>
<published>2019-10-07T09:47:13+00:00</published>
<link rel='alternate' type='text/html' href='https://git.platform-os.org/openstack/kolla-ansible.git/commit/?id=e91186c66c00fb3aba9c0650754e1fb681ed02e5'/>
<id>urn:sha1:e91186c66c00fb3aba9c0650754e1fb681ed02e5</id>
<content type='text'>
Adds a top-level guide for Nova, with links off to the various virt
driver guides.

Generalises the libvirt TLS guide into a libvirt guide, and adds info on
hardware virtualisation and qemu vs. kvm.

Adds information on configuring consoles.

Change-Id: I36beaaee313bdbc4bcf8cc15c41dda245a5a81ba
</content>
</entry>
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