tripleo-heat-templates/container_config_scripts
Damien Ciabrini cb55cc8ce5 Serialize shutdown of pacemaker nodes
When running minor update in a composable HA, different
roles could run ansible tasks concurrently. However,
there is currently a race when pacemaker nodes are
stopped in parallel [1,2], that could cause nodes to
incorrectly stop themselves once they reconnect to the
cluster.

To prevent concurrent shutdown, use a cluster-wide lock
to signals that one node is about to shutdown, and block
the others until the node disconnects from the cluster.

Tested the minor update in a composable HA environment:
  . when run with "openstack update run", every role
    is updated sequentially, and the shutdown lock
    doesn't interfere.
  . when running multiple ansible tasks in parallel
    "openstack update run --limit role<X>", pacemaker
    nodes are correctly stopped sequentially thanks
    to the shutdown lock.
  . when updating an existing overcloud, the new
    locking script used in the review is correctly
    injected on the overcloud, thanks to [3].

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1791841
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1872404
[3] I2ac6bb98e1d4183327e888240fc8d5a70e0d6fcb

Closes-Bug: #1904193
Change-Id: I0e041c6a95a7f53019967f9263df2326b1408c6f
2020-12-24 14:06:32 +01:00
..
monitoring Return details in output of container health check 2020-10-14 11:57:56 +02:00
tests Skip Trilio dirs when setting ownership in /var/lib/nova 2020-10-23 16:55:13 +00:00
__init__.py Rename docker_config_scripts to container_config_scripts 2019-03-06 09:05:50 -05:00
nova_statedir_ownership.py fix nova_statedir_ownership 2020-11-20 16:05:21 +01:00
nova_wait_for_api_service.py Change optparse to argparse 2020-01-21 04:17:09 +00:00
nova_wait_for_compute_service.py Change optparse to argparse 2020-01-21 04:17:09 +00:00
pacemaker_mutex_restart_bundle.sh Rolling certificate update for HA services 2020-07-30 16:51:48 +02:00
pacemaker_mutex_shutdown.sh Serialize shutdown of pacemaker nodes 2020-12-24 14:06:32 +01:00
pacemaker_resource_lock.sh Serialize shutdown of pacemaker nodes 2020-12-24 14:06:32 +01:00
pacemaker_restart_bundle.sh Fix pcs restart in composable HA 2020-08-19 16:21:15 +02:00
pacemaker_wait_bundle.sh HA: reorder init_bundle and restart_bundle for improved updates 2020-01-23 16:09:36 +01:00
placement_wait_for_service.py Stop to use the __future__ module. 2020-07-02 15:27:27 +00:00
pyshim.sh Fix typos 2020-09-16 15:45:12 +05:30
wait-port-and-run.sh Ensure redis_tls_proxy starts after all redis instances 2020-07-07 05:36:43 +00:00