openstack
/
charm-glance
Code Issues Proposed changes

Fix ceph relation, some drive-by template fixes 

Change-Id: Ib3a8fff7c202e2fc002371113e1301abda1e08bb
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Peter Matulis 2020-07-22 15:58:35 -04:00
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README.md
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# Overview # Overview
This charm provides the Glance image service for OpenStack. It is intended to The glance charm provides the Glance image service for OpenStack. It is
be used alongside the other OpenStack components. intended to be used alongside the other OpenStack components.
# Usage # Usage
Glance may be deployed in a number of ways. This charm focuses on 3 main Glance may be deployed in a number of ways. This charm focuses on 3 main
configurations. All require the existence of the other core OpenStack configurations. All require the existence of the other core OpenStack services
services deployed via Juju charms, specifically: mysql, keystone and deployed via Juju charms, specifically: mysql, keystone and
nova-cloud-controller. The following assumes these services have already nova-cloud-controller. The following assumes these services have already been
been deployed. deployed.
## Local Storage ## Local Storage
@ -23,9 +23,9 @@ to store image data:
## Swift backed storage ## Swift backed storage
Glance can also use Swift Object storage for image storage. Swift is often Glance can also use Swift Object storage for image storage. Swift is often
deployed as part of an OpenStack cloud and provides increased resilience and deployed as part of an OpenStack cloud and provides increased resilience and
scale when compared to using local disk storage. This configuration assumes scale when compared to using local disk storage. This configuration assumes
that you have already deployed Swift using the swift-proxy and swift-storage that you have already deployed Swift using the swift-proxy and swift-storage
charms: charms:
@ -40,21 +40,21 @@ This configuration can be used to support Glance in HA/Scale-out deployments.
## Ceph backed storage ## Ceph backed storage
In this configuration, Glance uses Ceph based object storage to provide In this configuration, Glance uses Ceph based object storage to provide
scalable, resilient storage of images. This configuration assumes that you scalable, resilient storage of images. This configuration assumes that you
have already deployed Ceph using the ceph charm: have already deployed Ceph using the ceph charm:
juju deploy glance juju deploy glance
juju add-relation glance keystone juju add-relation glance keystone
juju add-relation glance mysql juju add-relation glance mysql
juju add-relation glance nova-cloud-controller juju add-relation glance nova-cloud-controller
juju add-relation glance ceph juju add-relation glance ceph-mon
This configuration can also be used to support Glance in HA/Scale-out This configuration can also be used to support Glance in HA/Scale-out
deployments. deployments.
NOTE: Glance acts as a Ceph client in this case which requires IP (L3) > **Note**: Glance acts as a Ceph client in this case which requires IP (L3)
connectivity to ceph monitors and OSDs. For MAAS-based deployments this connectivity to Ceph monitors and OSDs. For MAAS-based deployments this can
can be addressed with network spaces (see the relevant section below). be addressed with network spaces (see section 'Network spaces' below).
## High availability ## High availability
@ -84,11 +84,13 @@ e.g.
juju add-relation glance ceilometer-agent juju add-relation glance ceilometer-agent
... ...
## Spaces ## Network spaces
This charm supports the use of Juju Spaces, allowing the charm to be bound to This charm supports the use of Juju [network spaces][juju-docs-spaces]. This
network space configurations managed directly by Juju. This is only supported feature optionally allows specific types of the application's network traffic
with Juju 2.0 and above. to be bound to subnets that the underlying hardware is connected to.
> **Note**: Spaces must be configured in the backing cloud prior to deployment.
API endpoints can be bound to distinct network spaces supporting the network API endpoints can be bound to distinct network spaces supporting the network
separation of public, internal and admin endpoints. separation of public, internal and admin endpoints.
@ -125,19 +127,16 @@ configuration:
ceph: ceph-access-space ceph: ceph-access-space
``` ```
NOTE: Spaces must be configured in the underlying provider prior to attempting > **Note**: Existing glance units configured with the `os-admin-network`,
to use them. `os-internal-network`, or `os-public-network` options will continue to honour
them. Furthermore, these options override any space bindings, if set.
NOTE: Existing deployments using os-*-network configuration options will ## Policy overrides
continue to function; these options are preferred over any network space
binding provided if set.
## Policy Overrides Policy overrides is an advanced feature that allows an operator to override the
default policy of an OpenStack service. The policies that the service supports,
Policy overrides is an **advanced** feature that allows an operator to override the defaults it implements in its code, and the defaults that a charm may
the default policy of an OpenStack service. The policies that the service include should all be clearly understood before proceeding.
supports, the defaults it implements in its code, and the defaults that a charm
may include should all be clearly understood before proceeding.
> **Caution**: It is possible to break the system (for tenants and other > **Caution**: It is possible to break the system (for tenants and other
services) if policies are incorrectly applied to the service. services) if policies are incorrectly applied to the service.
@ -152,14 +151,14 @@ Here are the essential commands (filenames are arbitrary):
juju attach-resource glance policyd-override=overrides.zip juju attach-resource glance policyd-override=overrides.zip
juju config glance use-policyd-override=true juju config glance use-policyd-override=true
See appendix [Policy Overrides][cdg-appendix-n] in the [OpenStack Charms See appendix [Policy overrides][cdg-appendix-n] in the [OpenStack Charms
Deployment Guide][cdg] for a thorough treatment of this feature. Deployment Guide][cdg] for a thorough treatment of this feature.
# Bugs # Bugs
Please report bugs on [Launchpad][lp-bugs-charm-glance]. Please report bugs on [Launchpad][lp-bugs-charm-glance].
For general charm questions refer to the OpenStack [Charm Guide][cg]. For general charm questions refer to the [OpenStack Charm Guide][cg].
<!-- LINKS --> <!-- LINKS -->
@ -169,3 +168,4 @@ For general charm questions refer to the OpenStack [Charm Guide][cg].
[lp-bugs-charm-glance]: https://bugs.launchpad.net/charm-glance/+filebug [lp-bugs-charm-glance]: https://bugs.launchpad.net/charm-glance/+filebug
[hacluster-charm]: https://jaas.ai/hacluster [hacluster-charm]: https://jaas.ai/hacluster
[cdg-ha-apps]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-ha.html#ha-applications [cdg-ha-apps]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-ha.html#ha-applications
[juju-docs-spaces]: https://juju.is/docs/spaces