Add an HA Server manager plugin to allow enabling and disabling a units active participation in an HA clustered service.
The manager will execute external scripts to disable a unit from active HA participation, validate health of the charmed service and re-enable the healthy charmed service in the HA-cluster.
This manager will depend on charms which surface the following:
- A set of health scripts at /var/lib/juju/units/$UNIT_NAME/health_checks.d/ which will return exit 0 on success and non-zero otherwise
- A script to disable the charmed service from active participation in the HA-cluster which returns 0 on success
- A script to enable the charmed service as an active participant in the HA-cluster which returns 0 on success
This is one step in a process for Openstack HA services managed by JUJU during a rolling upgrade.
1. HAServiceManager will disable the unit from the cluster via execution of charm's /var/lib/juju/units/$UNIT_NAME/remove_from_cluster script.
2. When package upgrades are done, HAServiceManager will validate the service is started and healthy via the charm's health scripts.
3. HAServiceManager will bring the unit back into the cluster with a call to the charm's /var/lib/juju/units/$UNIT_NAME/add_to_cluster script
If these scripts don't exist. Landscape-client will log a warning locally but process as if it has obtained successful return codes from the charm.
Hello Chad, or anyone else affected,
Accepted landscape-client into lucid-proposed. The package will build now and be available at http://
Please help us by testing this new package. See https:/
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