cinder-backup from ceph with ipv6 is broken

[Jon Bernard]

When cinder is configured to use ipv6, a cinder-backup from a ceph volume will
fail to connect. This happens because cinder-backup calls to os-brick to
connect to the ceph cluster - which generates a temporary ceph.conf file in
/tmp. This file contains a list of monitor IP addresses and ports like:

mon_host =
    fd00:fd00:fd00:3000::14:6789,
    fd00:fd00:fd00:3000::17:6789,
    fd00:fd00:fd00:3000::1d:6789

For ipv6, the ip addresses must be enclosed in square brackets to prevent
confusion with the port number. The correct string should instead be:

mon_host =
    [fd00:fd00:fd00:3000::14]:6789,
    [fd00:fd00:fd00:3000::17]:6789,
    [fd00:fd00:fd00:3000::1d]:6789

The same change applied to ipv4 addresses works also, no regressions.

If you need a formal reference, see RFC 3986, Section 3.2.2.

[Jon Bernard (jbernard)]

https://review.openstack.org/#/c/396356/

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/os-brick 1.9.0 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/os-brick 1.6.2 release.