Carlos Goncalves 92473ce210 Make health checks resilient to DB outages ... Octavia is struggling with proper handling of DB connectivity issues bringing down all running loadbalancers. Octavia tries to failover amphorae and can fail in one of the following stages: 1. Octavia can't create new amphora because Nova isn't ready yet after DB outage. Nova-API throws 500, Octavia nukes amphora instance and won't try to recreate it again. 2. Octavia tries to recreate amphora instance but it gets stuck in PENDING_CREATE forever. 3. Octavia fails completely reporting DB connection issues, leaving some amphoras in error, some in pending_delete as bellow: It affects also HA deployments. This patch fixes that by wrapping the DB check for health, waiting for the connection to be re-established and sleeping off the full "heartbeat_timeout" interval. Story: 2003575 Task: 24871 Change-Id: I7b30cd31e1ce0cf9dab61484f4404f1c6ccddd5e		2018-09-11 12:21:22 -06:00
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notes	Make health checks resilient to DB outages	2018-09-11 12:21:22 -06:00
source	Imported Translations from Zanata	2018-08-10 06:55:15 +00:00