This will pick up the kernel fix for T261389.
As we're not changing the es5 master, just rebooting it, we can use a simplified version of the normal maintenance procedure.
Steps:
[ ] Downtime all es5 hosts: `sudo -H cookbook sre.hosts.downtime --minutes 30 -r "Schema change s3/codfw T259831" 'A:db-section-es5'`
[ ] Merge mediawiki-config CR to disable writes to es5 TODO
[ ] Deploy MW change from deploy1001: `cd /srv/mediawiki-staging/; git status; git fetch; git rebase; scap sync-file wmf-config/db-eqiad.php "Disable writes to es5 T268469"`
[ ] Check that es5 is read-only (only heartbeat update statements in mysqlbinlog)
[ ] Reboot es1024
[ ] Start mariadb: `systemctl start mariadb`
[ ] Restart prom exporter: `systemctl restart prometheus-mysqld-exporter`
[ ] Check that replication is working correctly: `sudo -H db-replication-tree es1024`
[ ] Revert MW change
[ ] Deploy MW revert from deploy1001: `cd /srv/mediawiki-staging/; git status; git fetch; git rebase; scap sync-file wmf-config/db-eqiad.php "Re-enable writes to es5 T268469"`
[ ] Check that icinga is all green