21.10 (Draft version in progress)

Summary of changes


The 21.10 OpenStack Charms release includes updates for the charms described on the Charms page. As of this release, the project consists of <NUMBER-OF-STABLE-CHARMS> supported (stable) charms.

For the list of bugs resolved in this release refer to the 21.10 milestone in Launchpad.

For scheduling information of past and future releases see the Release schedule.

General charm information is published in the OpenStack Charm Guide (this guide) which ultimately supersedes Release Notes contents.


Always upgrade to the latest stable charms before making any major changes to your cloud and before filing bug reports. Refer to section Upgrading charms below for details.

New charm features

With each new feature, there is a corresponding example bundle in the form of a test bundle, and/or a section in the OpenStack Charms Deployment Guide, that details its usage. Test bundles are located in the src/tests/bundles directory of the relevant charm repository (see all charm repositories).

glance charm: external S3 compatible storage support

The glance charm has acquired some new configuration options:

  • s3-store-host

  • s3-store-access-key

  • s3-store-secret-key

  • s3-store-bucket

These options are used to set an external S3 compatible storage backend for Glance. S3 support in the charm is enabled only for Ussuri and later releases.

nova-compute charm: number of hosted VMs

The nova-compute charm has a new action: instance-count.

This action returns the number of VMs hosted on a nova-compute unit, whether they be running, suspended, or stopped.

ceilometer-agent charm: new polling configuration options

The ceilometer-agent charm has two new options: polling-interval and enable-all-pollsters.

These can be used to control the polling frequency and the set of meters collected by the compute polling agent. The meters that can be collected via enable-all-pollsters are listed in Compute meters documentation with ‘Pollster’ in the origin column.

cinder-purestorage charm: new configuration options

The cinder-purestorage charm has a number of new configuration options:

  • eradicate-on-delete

  • automatic-max-oversubscription

  • iscsi-cidr

  • use-chap

  • use-replication

  • replication-target-name

  • replication-target-address

  • replication-target-api-token

  • replication-type

  • replication-sync-uniform

  • replica-interval

  • replica-retention-short

  • replica-retention-per-day

  • replica-retention-long

  • replication-pgname

  • replication-pod

  • use-image-cache

  • image-volume-cache-max-size-gb

  • image-volume-cache-max-count

These options are used to enable and configure Cinder replication and Glance Image Cache for Cinder, along with a number of Pure Storage driver specific features.

Please refer to the cinder-purestorage charm documentation for a description of these configuration options.

neutron-api charm: FWaaS option

The neutron-api charm has a new configuration option: enable-fwaas.

This option controls the enablement of the Neutron FWaaS service. It defaults to ‘true’ to retain past behaviour but only takes effect for OpenStack releases older than Victoria. Setting it to ‘false’ will disable the service on all neutron-api units.

See deprecation notice neutron-api charm: FWaaS removal for background information.

ceph-mon charm: disk capacity alert threshold configuration

The ceph-mon charm has two new configuration options: monitor-data-available-warning and monitor-data-available-critical.

These options can be used to configure the thresholds at which the Ceph cluster goes into HEALTH_WARN and HEALTH_ERR states based on the available disk capacity.

ceph-radosgw charm: Beast HTTP frontend

The ceph-radosgw charm has a new configuration option: http-frontend.

With the availability of the Beast frontend the ceph-radosgw charm now supports the selection of what Ceph RADOS Gateway HTTP frontend to use. Starting with Ceph Octopus the default value (of option http-frontend) is ‘beast’, and for older releases ‘civetweb’ will continue to be used.

designate charm: new options for creating DNS records

The designate charm has some new configuration options:

  • default-ttl

  • default-soa-minimum

  • default-soa-refresh-min

  • default-soa-refresh-max

  • default-soa-retry

These options are used to define default settings for the creation of DNS records. They have no effect on existing records.

nova-compute charm: new options for neutron physnets NUMA affinity

The nova charm has some new configuration options:

  • neutron-physnets

  • neutron-tunnel

These options are used to define NUMA affinity for neutron physnets and tunneled networks.

ceph-osd charm: new action to display availability zones information

The ceph-osd charm has a new action: get-availability-zone.

This action returns availability zone information that contains CRUSH structure information. Specifically ‘rack’, ‘row’, etc.

manila charm: new relation nrpe-external-master to nrpe charm

The manila charm has a new relation to nrpe charm.

This relation adds nrpe checks for services managed by manila charm to be monitored with Nagios.

ceph-mon charm: new parameter for list-pools action

The ceph-mon charm’s list-pools action has a new format parameter that accepts the following values:

  • text - provides less information [default]

  • text-full - provides more information in json with indents

  • json - provides more information in json

The default text provides the same output as previous version.

neutron-gateway charm: new actions to display routers/networks/loadbalancers

The neutron-gateway charm has three new actions that enable listing neutron resources hosted on the unit.

  • show-routers - Lists neutron routers on the unit

  • show-dhcp-networks - Lists DHCP networks on the unit

  • show-loadbalancers - Lists LBaaS v2 loadbalancers on the unit

cinder charm: image volume caching

The cinder charm has the following new configuration options:

image-volume-cache-enabled image-volume-cache-max-size-gb image-volume-cache-max-count

These will allow the enablement of a Cinder image cache as well as set its maximum size and its maximum number of entries. These options are supported on OpenStack Ocata and newer.

ceph-mon charm: new action to display quorum status

The ceph-mon charm has a new action: get-quorum-status.

The get-quorum-status action returns some distilled info from ‘ceph quorum_status’, primarily for verification of which mon units are online.

New stable charms


New tech-preview charms

Ironic charms

The following tech-preview charms are available for the deployment of OpenStack Ironic:

  • ironic-api

  • ironic-conductor

  • neutron-api-plugin-ironic

Ironic provisions bare metal, as opposed to virtual, machines.

Preview charm features


Documentation updates

In the OpenStack Charms Deployment Guide (aka “deploy guide”):

  • A new page on OpenStack Ironic support has been added.

  • A new section on cloud operations has been started.

Informational notices

neutron-openvswitch charm: DHCP service restarts in DPDK environments

When DPDK is enabled and DHCP is running locally on a compute node, the neutron-dhcp-agent service now restarts during charm upgrades or when any configuration change that triggers the restart of the neutron-openvswitch agent.

Deprecation notices

Xenial Series

The Ubuntu ‘Xenial’ series will be removed from general gate testing following this release and maintenance will be limited to critical and high security fixes only. Users are strongly encouraged to upgrade their clouds to a newer platform.

Barbican SoftHSM2 Plugin

The barbican-softhsm test charm is now deprecated and will have no further releases. Support has ended for it. Please use barbican-vault instead.

neutron-api charm: FWaaS removal

The Firewall-as-a-Service (FWaaS) OpenStack project is retired and will not receive updates beyond v16.0.0. Consequently, the neutron-api charm will no longer make this service available starting with OpenStack Victoria.

See new charm feature neutron-api charm: FWaaS option resulting as a consequence of this.

Tempest charm

The tempest test charm is now deprecated and will have no further releases. Support has ended for it. Please use the tempest Python package instead.

Removed features


Removed charms


Issues discovered during this release cycle


Upgrading charms

Upgrading charms will making available new features and bug fixes. However, the latest stable charm revision should also be used prior to making any topological changes, application migrations, workload upgrades, or series upgrades. Bug reports should also be filed against the most recent revision.

Note that charm upgrades and OpenStack upgrades are functionally different. For instructions on performing the different upgrade types see Upgrades overview in the OpenStack Charms Deployment Guide.