ID: 15234
Title: Periodic service discovery: Vanished clustered services can now be removed
automatically
Component: Checks & agents
Level: 1
Class: Bug fix
Version: 2.2.0i1
Up to this Werk vanished clustered services could never be removed using the periodic
service discovery.
We have now added a configuration option that allows users to achieve just that, but
beware:
By default we keep a record of vanished services on the node if they are assigned to a
cluster.
When a clustered service switches from one node to another, it might not be seen on either
node for one check cycle.
Keeping clustered services indefinitely keeps us from loosing them in this case.
However this means that truly vanished clustered servces will never be removed from the
cluster.
If you choose to include clustered service in the removal operation, vanished services
will be removed from clusters, at the risk of loosing services due to the described race
condition.
If you have specific needs, you can always adapt the services according to your needs
manually using the service discovery page.
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