801c2e7829
In order to fix bug#1756928 the whole cluster buildup process needed to be redesigned. The assumptions about what is_bootstrapped and clustered meant and when to restart on configuration changed needed to be re-evaluated. The timing of restarts needed to be protected to avoid collisions. Only bootstrapped hosts should go in to the wsrep_cluster_address=gcomm:// setting. Adding or removing units should be handled gracefully. Starting with a single unit and expanding to a cluster must work. This change guarantees mysqld is restarted when the configuration file changes and meets all the above requirements. As a consequence of the redesign, the workload status now more accurately reflects the state of the unit. Charm-helpers sync to bring in distributed_wait fix. Closes-Bug: #1756308 Closes-Bug: #1756928 Change-Id: I0742e6889b32201806cec6a0b5835e11a8027567 |
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