Change Details

db1195 needs to be rebooted. Let's promote db1176 to master When: Thursday 26th Jan Impact: Read only for a few seconds on the services below: Services running on m1: * bacula * cas (and cas staging) * backups * etherpad * librenms * pki * rt Switchover steps: OLD MASTER: db1195 NEW MASTER: db1176 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1195.eqiad.wmnet,F=/root/.my.cnf h=db1176.eqiad.wmnet,F=/root/.my.cnf ` [x] Silence alerts on all hosts [x] Topology changes: move everything under db1176 `db-switchover --timeout=1 --only-slave-move db1195.eqiad.wmnet db1176.eqiad.wmnet` [x] Disable puppet @db1176 and puppet @db1195 `sudo cumin 'db1195* or db1176*' 'disable-puppet "primary switchover T327800"'` [x] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883703 [x] Run puppet on dbproxy1012 and dbproxy1014 and check the config `puppet agent -tv && cat /etc/haproxy/conf.d/db-master.cfg` [x] Start the failover `!log Failover m1 from db1195 to db1176 - T327800` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1195 db1176 ``` [x] Reload haproxies ``` dbproxy1012: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio dbproxy1014: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio ``` [x] kill connections on the old master (db1195) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [x] Restart puppet on old and new masters (for heartbeat):db1164 and db1195 ` sudo cumin 'db1195* or db1176*' 'run-puppet-agent -e "primary switchover T327800"'` [x] Check services affected (librenms, racktables, etherpad...) [x] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1176 heartbeat -e "delete from heartbeat where file like 'db1195%';"` [x] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883705/ [] Create floating ticket for db1195 to be moved to m2: [] Update/resolve phabricator ticket about failover

db1195 needs to be rebooted. Let's promote db1176 to master When: Thursday 26th Jan Impact: Read only for a few seconds on the services below: Services running on m1: * bacula * cas (and cas staging) * backups * etherpad * librenms * pki * rt Switchover steps: OLD MASTER: db1195 NEW MASTER: db1176 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1195.eqiad.wmnet,F=/root/.my.cnf h=db1176.eqiad.wmnet,F=/root/.my.cnf ` [x] Silence alerts on all hosts [x] Topology changes: move everything under db1176 `db-switchover --timeout=1 --only-slave-move db1195.eqiad.wmnet db1176.eqiad.wmnet` [x] Disable puppet @db1176 and puppet @db1195 `sudo cumin 'db1195* or db1176*' 'disable-puppet "primary switchover T327800"'` [x] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883703 [x] Run puppet on dbproxy1012 and dbproxy1014 and check the config `puppet agent -tv && cat /etc/haproxy/conf.d/db-master.cfg` [x] Start the failover `!log Failover m1 from db1195 to db1176 - T327800` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1195 db1176 ``` [x] Reload haproxies ``` dbproxy1012: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio dbproxy1014: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio ``` [x] kill connections on the old master (db1195) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [x] Restart puppet on old and new masters (for heartbeat):db1164 and db1195 ` sudo cumin 'db1195* or db1176*' 'run-puppet-agent -e "primary switchover T327800"'` [x] Check services affected (librenms, racktables, etherpad...) [x] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1176 heartbeat -e "delete from heartbeat where file like 'db1195%';"` [x] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883705/ [x] Create floating ticket for db1195 to be moved to m2: T327995 [x] Update/resolve phabricator ticket about failover

db1195 needs to be rebooted. Let's promote db1176 to master When: Thursday 26th Jan Impact: Read only for a few seconds on the services below: Services running on m1: * bacula * cas (and cas staging) * backups * etherpad * librenms * pki * rt Switchover steps: OLD MASTER: db1195 NEW MASTER: db1176 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1195.eqiad.wmnet,F=/root/.my.cnf h=db1176.eqiad.wmnet,F=/root/.my.cnf ` [x] Silence alerts on all hosts [x] Topology changes: move everything under db1176 `db-switchover --timeout=1 --only-slave-move db1195.eqiad.wmnet db1176.eqiad.wmnet` [x] Disable puppet @db1176 and puppet @db1195 `sudo cumin 'db1195* or db1176*' 'disable-puppet "primary switchover T327800"'` [x] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883703 [x] Run puppet on dbproxy1012 and dbproxy1014 and check the config `puppet agent -tv && cat /etc/haproxy/conf.d/db-master.cfg` [x] Start the failover `!log Failover m1 from db1195 to db1176 - T327800` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1195 db1176 ``` [x] Reload haproxies ``` dbproxy1012: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio dbproxy1014: systemctl reload haproxy && echo "show stat" | socat /run/haproxy/haproxy.sock stdio ``` [x] kill connections on the old master (db1195) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [x] Restart puppet on old and new masters (for heartbeat):db1164 and db1195 ` sudo cumin 'db1195* or db1176*' 'run-puppet-agent -e "primary switchover T327800"'` [x] Check services affected (librenms, racktables, etherpad...) [x] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1176 heartbeat -e "delete from heartbeat where file like 'db1195%';"` [x] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/883705/ [x] Create floating ticket for db1195 to be moved to m2: [T327995 [x] Update/resolve phabricator ticket about failover