Swift charms do not allow multi-region deployments

[Tytus Kurek]

Swift charms do not allow multi-region Swift deployments as described here:

https://docs.openstack.org/swift/pike/overview_global_cluster.html

For this to work changes have to be made in both swift-proxy and swift-storage charm. I have already created an initial version of the patches:

https://github.com/tytus-kurek/charm-swift-proxy/tree/1815879
https://github.com/tytus-kurek/charm-swift-storage/tree/1815879

I will submit them for a review once polished.

[Tytus Kurek (tkurek)]

I have created a blog post describing how to setup Swift Global Cluster with the patched charms:

https://tkurek.blogspot.com/2019/02/swift-global-cluster-multi-region.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/638406

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/638407

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/638406
Committed: https://git.openstack.org/cgit/openstack/charm-swift-storage/commit/?id=fc261a5adc62b04af178fac7a36b69f8589f55bf
Submitter: Zuul
Branch: master

commit fc261a5adc62b04af178fac7a36b69f8589f55bf
Author: Tytus Kurek <email address hidden>
Date: Thu Feb 21 12:04:00 2019 +0000

    Swift Global Cluster

    This patchset adds a support for Swift Global Cluster feature as
    described at:

    https://docs.openstack.org/swift/latest/overview_global_cluster.html

    It allows specifying 'region' config option as part of the deployment.
    Theregion is reflected later on in the Swift rings.

    Change-Id: I11b6c7802e5bfbd61b06e4d11c65804a165781b6
    Partial-Bug: 1815879
    Needed-By: I406445493e2226aa5ae40a09c9053ac8633a46e9

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/638407
Committed: https://git.openstack.org/cgit/openstack/charm-swift-proxy/commit/?id=44df5db97d59e9de3510553082d276fc3a1c3bbf
Submitter: Zuul
Branch: master

commit 44df5db97d59e9de3510553082d276fc3a1c3bbf
Author: Tytus Kurek <email address hidden>
Date: Thu Feb 21 12:08:44 2019 +0000

    Swift Global Cluster

    This patchset adds a support for Swift Global Cluster feature as
    described at:

    https://docs.openstack.org/swift/latest/overview_global_cluster.html

    It allows specifying affinity settings as parrt of the deployment.
    Moreover, the master - slave relation is introduced for the purpose of
    rings distribution across proxy nodes participating in the Swift Global
    Cluster.

    Change-Id: I406445493e2226aa5ae40a09c9053ac8633a46e9
    Closes-Bug: 1815879
    Depends-On: I11b6c7802e5bfbd61b06e4d11c65804a165781b6