Operating Kolla¶
Tools versioning¶
Kolla and Kolla Ansible use the x.y.z
semver
nomenclature for naming versions, with major version increasing with each
new series, e.g., Wallaby.
The tools are designed to, respectively, build and deploy Docker images of
OpenStack services of that series.
Users are advised to run the latest version of tools for the series they
target, preferably by installing directly from the relevant branch of the Git
repository, e.g.:
pip3 install --upgrade git+https://opendev.org/openstack/kolla-ansible@unmaintained/yoga
Version of deployed images¶
By default, Kolla Ansible will deploy or upgrade using the series name embedded
in the internal config (openstack_release
) and it is not recommended to
tweak this unless using a local registry and a custom versioning policy, e.g.,
when users want to control when services are upgraded and to which version,
possibly on a per-service basis (but this is an advanced use case scenario).
Upgrade procedure¶
Note
This procedure is for upgrading from series to series, not for doing updates
within a series.
Inside a series, it is usually sufficient to just update the
kolla-ansible
package, rebuild (if needed) and pull the images,
and run kolla-ansible deploy
again.
Please follow release notes to check if there are any issues to be aware of.
Note
If you have set enable_cells
to yes
then you should read the
upgrade notes in the Nova cells guide.
Kolla’s strategy for upgrades is to never make a mess and to follow consistent patterns during deployment such that upgrades from one environment to the next are simple to automate.
Kolla Ansible implements a single command operation for upgrading an existing deployment.
Limitations and Recommendations¶
Note
Please note that when the use_preconfigured_databases
flag is set to
"yes"
, you need to have the log_bin_trust_function_creators
set to
1
by your database administrator before performing the upgrade.
Note
If you have separate keys for nova and cinder, please be sure to set
ceph_nova_keyring: ceph.client.nova.keyring
and ceph_nova_user: nova
in /etc/kolla/globals.yml
Ubuntu Focal 20.04¶
The Victoria release adds support for Ubuntu Focal 20.04 as a host operating system. Ubuntu users upgrading from Ussuri should first upgrade OpenStack containers to Victoria, which uses the Ubuntu Focal 20.04 base container image. Hosts should then be upgraded to Ubuntu Focal 20.04.
Ubuntu Jammy 22.04¶
The Zed release adds support for Ubuntu Jammy 22.04 as a host operating system. Ubuntu Jammy 22.04 support has also been added to a Yoga stable release. Ubuntu Focal 20.04 users upgrading from Yoga should first upgrade OpenStack containers to Zed, which uses the Ubuntu Jammy 22.04 base container image. Hosts should then be upgraded to Ubuntu Jammy 22.04.
CentOS Stream 8¶
The Wallaby release adds support for CentOS Stream 8 as a host operating system. CentOS Stream 8 support will also be added to a Victoria stable release. CentOS Linux users upgrading from Victoria should first migrate hosts and container images from CentOS Linux to CentOS Stream before upgrading to Wallaby.
Preparation (the foreword)¶
Before preparing the upgrade plan and making any decisions, please read the release notes for the series you are targeting, especially the Upgrade notes that we publish for your convenience and awareness.
Before you begin, make a backup of your config. On the operator/deployment
node, copy the contents of the config directory (/etc/kolla
by default) to
a backup place (or use versioning tools, like git, to keep previous versions
of config in a safe place).
Preparation (the real deal)¶
First, upgrade the kolla-ansible
package:
pip3 install --upgrade git+https://opendev.org/openstack/kolla-ansible@unmaintained/yoga
Note
If you are running from Git repository, then just checkout the desired
branch and run pip3 install --upgrade
with the repository directory.
If upgrading to a Yoga release or later, install or upgrade Ansible Galaxy dependencies:
kolla-ansible install-deps
The inventory file for the deployment should be updated, as the newer sample
inventory files may have updated layout or other relevant changes.
The diff
tool (or similar) is your friend in this task.
If using a virtual environment, the sample inventories are in
/path/to/venv/share/kolla-ansible/ansible/inventory/
, else they are
most likely in
/usr/local/share/kolla-ansible/ansible/inventory/
.
Other files which may need manual updating are:
/etc/kolla/globals.yml
/etc/kolla/passwords.yml
For globals.yml
, it is best to follow the release notes (mentioned above).
For passwords.yml
, one needs to use kolla-mergepwd
and kolla-genpwd
tools.
kolla-mergepwd --old OLD_PASSWDS --new NEW_PASSWDS --final FINAL_PASSWDS
is used to merge passwords from old installation with newly generated
passwords. The workflow is:
Save old passwords from
/etc/kolla/passwords.yml
intopasswords.yml.old
.Generate new passwords via
kolla-genpwd
aspasswords.yml.new
.Merge
passwords.yml.old
andpasswords.yml.new
into/etc/kolla/passwords.yml
.
For example:
cp /etc/kolla/passwords.yml passwords.yml.old
cp kolla-ansible/etc/kolla/passwords.yml passwords.yml.new
kolla-genpwd -p passwords.yml.new
kolla-mergepwd --old passwords.yml.old --new passwords.yml.new --final /etc/kolla/passwords.yml
Note
kolla-mergepwd
, by default, keeps old, unused passwords intact.
To alter this behavior, and remove such entries, use the --clean
argument when invoking kolla-mergepwd
.
Run the command below to pull the new images on target hosts:
kolla-ansible pull
It is also recommended to run prechecks to identify potential configuration issues:
kolla-ansible prechecks
At a convenient time, the upgrade can now be run.
Perform the Upgrade¶
To perform the upgrade:
kolla-ansible upgrade
After this command is complete, the containers will have been recreated from the new images and all database schema upgrades and similar actions performed for you.
Tips and Tricks¶
Kolla Ansible CLI¶
When running the kolla-ansible
CLI, additional arguments may be passed to
ansible-playbook
via the EXTRA_OPTS
environment variable.
kolla-ansible -i INVENTORY deploy
is used to deploy and start all Kolla
containers.
kolla-ansible -i INVENTORY destroy
is used to clean up containers and
volumes in the cluster.
kolla-ansible -i INVENTORY mariadb_recovery
is used to recover a
completely stopped mariadb cluster.
kolla-ansible -i INVENTORY prechecks
is used to check if all requirements
are meet before deploy for each of the OpenStack services.
kolla-ansible -i INVENTORY post-deploy
is used to do post deploy on deploy
node to get the admin openrc file.
kolla-ansible -i INVENTORY pull
is used to pull all images for containers.
kolla-ansible -i INVENTORY reconfigure
is used to reconfigure OpenStack
service.
kolla-ansible -i INVENTORY upgrade
is used to upgrades existing OpenStack
Environment.
kolla-ansible -i INVENTORY check
is used to do post-deployment smoke
tests.
kolla-ansible -i INVENTORY stop
is used to stop running containers.
kolla-ansible -i INVENTORY deploy-containers
is used to check and if
necessary update containers, without generating configuration.
kolla-ansible -i INVENTORY prune-images
is used to prune orphaned Docker
images on hosts.
kolla-ansible -i INVENTORY1 -i INVENTORY2 ...
Multiple inventories can be
specified by passing the --inventory
or -i
command line option multiple
times. This can be useful to share configuration between multiple environments.
Any common configuration can be set in INVENTORY1
and INVENTORY2
can be
used to set environment specific details.
kolla-ansible -i INVENTORY gather-facts
is used to gather Ansible facts,
for example to populate a fact cache.
Note
In order to do smoke tests, requires kolla_enable_sanity_checks=yes
.
Using Hashicorp Vault for password storage¶
Hashicorp Vault can be used as an alternative to Ansible Vault for storing passwords generated by Kolla Ansible. To use Hashicorp Vault as the secrets store you will first need to generate the passwords, and then you can save them into an existing KV using the following command:
kolla-writepwd \
--passwords /etc/kolla/passwords.yml \
--vault-addr <VAULT_ADDRESS> \
--vault-token <VAULT_TOKEN>
Note
For a full list of kolla-writepwd
arguments, use the --help
argument when invoking kolla-writepwd
.
To read passwords from Hashicorp Vault and generate a passwords.yml:
mv kolla-ansible/etc/kolla/passwords.yml /etc/kolla/passwords.yml
kolla-readpwd \
--passwords /etc/kolla/passwords.yml \
--vault-addr <VAULT_ADDRESS> \
--vault-token <VAULT_TOKEN>
Tools¶
Kolla ships with several utilities intended to facilitate ease of operation.
tools/cleanup-containers
is used to remove deployed containers from the
system. This can be useful when you want to do a new clean deployment. It will
preserve the registry and the locally built images in the registry, but will
remove all running Kolla containers from the local Docker daemon. It also
removes the named volumes.
tools/cleanup-host
is used to remove remnants of network changes
triggered on the Docker host when the neutron-agents containers are launched.
This can be useful when you want to do a new clean deployment, particularly one
changing the network topology.
tools/cleanup-images --all
is used to remove all Docker images built by
Kolla from the local Docker cache.