95 lines
3.7 KiB
ReStructuredText
95 lines
3.7 KiB
ReStructuredText
.. _operating-kolla:
|
|
|
|
===============
|
|
Operating Kolla
|
|
===============
|
|
|
|
Upgrading
|
|
=========
|
|
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 implements a one command operation for upgrading an existing deployment
|
|
consisting of a set of containers and configuration data to a new deployment.
|
|
|
|
Kolla uses the ``x.y.z`` semver nomenclature for naming versions. Kolla's
|
|
Liberty version is ``1.0.0`` and the Mitaka version is ``2.0.0``. The Kolla
|
|
community commits to release z-stream updates every 45 days that resolve
|
|
defects in the stable version in use and publish those images to the Docker Hub
|
|
registry. To prevent confusion, the Kolla community recommends using an alpha
|
|
identifier ``x.y.z.a`` where ``a`` represents any customization done on the
|
|
part of the operator. For example, if an operator intends to modify one of the
|
|
Docker files or the repos from the originals and build custom images for the
|
|
Liberty version, the operator should start with version 1.0.0.0 and increase
|
|
alpha for each release. Alpha tag usage is at discretion of the operator. The
|
|
alpha identifier could be a number as recommended or a string of the operator's
|
|
choosing.
|
|
|
|
If the alpha identifier is not used, Kolla will deploy or upgrade using the
|
|
version number information contained in the release. To customize the
|
|
version number uncomment openstack_version in globals.yml and specify
|
|
the version number desired.
|
|
|
|
For example, to deploy a custom built Liberty version built with the
|
|
``kolla-build --tag 1.0.0.0`` operation, change globals.yml::
|
|
|
|
openstack_version: 1.0.0.0
|
|
|
|
Then run the command to deploy::
|
|
|
|
kolla-ansible deploy
|
|
|
|
If using Liberty and a custom alpha number of 0, and upgrading to 1, change
|
|
globals.yml::
|
|
|
|
openstack_version: 1.0.0.1
|
|
|
|
Then run the command to upgrade::
|
|
|
|
kolla-ansible upgrade
|
|
|
|
.. note:: Varying degrees of success have been reported with upgrading
|
|
the libvirt container with a running virtual machine in it. The libvirt
|
|
upgrade still needs a bit more validation, but the Kolla community feels
|
|
confident this mechanism can be used with the correct Docker graph driver.
|
|
|
|
.. note:: The Kolla community recommends the btrfs or aufs graph drivers for
|
|
storing data as sometimes the LVM graph driver loses track of its reference
|
|
counting and results in an unremovable container.
|
|
|
|
.. note:: Because of system technical limitations, upgrade of a libvirt
|
|
container when using software emulation (``virt_driver=qemu`` in nova.conf),
|
|
does not work at all. This is acceptable because KVM is the recommended
|
|
virtualization driver to use with Nova.
|
|
|
|
Diagnostics
|
|
===========
|
|
TODO(all) fill this section out
|
|
|
|
Failure Recovery
|
|
================
|
|
TODO(all) fill this section out
|
|
|
|
Reconfiguration of an existing environment
|
|
==========================================
|
|
TODO(all) fill this section out
|
|
|
|
Tips and Tricks
|
|
===============
|
|
Kolla ships with several utilities intended to facilitate ease of operation.
|
|
|
|
``tools/cleanup-containers`` can be 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`` can be 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`` can be used to remove all Docker images built by Kolla
|
|
from the local Docker cache.
|