This patchset aims to add HA Clustering support for Postgres. HA Clustering
provides automatic failover in the event of the database going down in addition
to keeping replicas of the database for rebuilding in the event of a node
going down. To achieve this clustering we use
[Patroni](https://github.com/zalando/patroni) which offers HA clustering
support for Postgres.
Patroni is a daemon that runs in the background and keeps track of which
node in your cluster is currently the leader node and routes all traffic
on the Postgresql endpoint to that node. If the leader node goes down,
Patroni holds an election to chose a new leader and updates the endpoint
to route traffic accordingly. All communication between nodes is done by
a Patroni created endpoint, seperate from the externally facing Postgres
endpoint.
Note that, although the postgresql helm chart can be upgraded from
non-patroni to patroni clustering, the previous `postgresql`
endpoints object (which is not directly managed by helm) must be
deleted via an out-of-band mechanism so that it may be replaced by the
patroni-managed endpoints. If Postgres itself is leveraged for the
deployment process, this must be done with careful timing. Note that
the old endpoints had a port named "db", and the new endpoints has
a port named "postgresql".
- Picking up patchset: https://review.openstack.org/#/c/591663
Co-authored-by: Tony Sorrentino <as1413@att.com>
Co-authored-by: Randeep Jalli <rj2083@att.com>
Co-authored-by: Pete Birley <pete@port.direct>
Co-authored-by: Matt McEuen <mm9745@att.com>
Change-Id: I721b745017dc1ea7ae05dfd9f8d5dd08d0965985
* Postgresql lack the feature of creating databases if not exist
* Add a function to workaround in the restore script.
Change-Id: If451204e3cec573a0dbfe91549a47ee569799a22
* backup script for postgresql
* restore script for postgresql
* cronjob to control backup automation for postgresql
* add parameters to values.yaml
Change-Id: I5eaa82e824c9f361aa667c431cd93058391f2e60
- Make the default to run the postgres database as the uid 999 which
the default image maps to the 'postgres' user
- If the database is already initialized, before starting postgres
set the 'postgres' database user password to match the declared
intended password
Change-Id: I7b0ea7a86246b098f38ef4c03dd157731f61e066
This moves the postgresql chart to openstack-helm-infra as part of
the effort to move charts to the appropriate repositories
Change-Id: I25c026e5d4c4abe4dd0805047051281911632739
Story: 2002204
Task: 21729
