Lingxian Kong a8285b564d Support Heat auto-healing notifier ...

The auto-healing notifier works together with loadbalancer_member_health
evaluator.

Presumably, the end user defines a Heat template which contains an
autoscaling group and all the members in the group are joined in an
Octavia load balancer in order to expose service to the outside, so that
when the stack scales up or scales down, Heat makes sure the new members
are joining the load balancer automatically and the old members are
removed.

However, this notifier deals with the situation that when some member
fails, the stack could be recovered by marking the given autoscaling
group member unhealthy, then update Heat stack in place.

Change-Id: I6e92d1fc2125e155bb5068ff2c14fa318b126442

2019-05-16 11:26:13 +12:00

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