Change Details

db1176 is in row A and there will be a switch maintenance with hard downtime When: Monday 13th Feb - 11AM UTC 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: db1176 NEW MASTER: db1164 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1176.eqiad.wmnet,F=/root/.my.cnf h=db1164.eqiad.wmnet,F=/root/.my.cnf ` [] Silence alerts on all hosts [x] Topology changes: move everything under db1164 `db-switchover --timeout=1 --only-slave-move db1176.eqiad.wmnet db1164.eqiad.wmnet` [] Disable puppet @db1164 and puppet @db1176 `sudo cumin 'db1176* or db1164*' 'disable-puppet "primary switchover T329259"'` [] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/888359 [] Run puppet on dbproxy1012 and dbproxy1014 and check the config `run-puppet-agent && cat /etc/haproxy/conf.d/db-master.cfg` [] Start the failover `!log Failover m1 from db1176 to db1164 - T329259` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1176 db1164 ``` [] 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 ``` [] kill connections on the old master (db1176) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [] Restart puppet on old and new masters (for heartbeat):db1164 and db1176 ` sudo cumin 'db1176* or db1164*' 'run-puppet-agent -e "primary switchover T329259"'` [] Check services affected (librenms, racktables, etherpad...) [] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1164 heartbeat -e "delete from heartbeat where file like 'db1176%';"` [] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/887885/ [] Create floating ticket for db1176 to be moved to m5: [] Update/resolve phabricator ticket about failover

db1176 is in row A and there will be a switch maintenance with hard downtime When: Monday 13th Feb - 11AM UTC 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: db1176 NEW MASTER: db1164 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1176.eqiad.wmnet,F=/root/.my.cnf h=db1164.eqiad.wmnet,F=/root/.my.cnf ` [x] Silence alerts on all hosts [x] Topology changes: move everything under db1164 `db-switchover --timeout=1 --only-slave-move db1176.eqiad.wmnet db1164.eqiad.wmnet` [x] Disable puppet @db1164 and puppet @db1176 `sudo cumin 'db1176* or db1164*' 'disable-puppet "primary switchover T329259"'` [x] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/888359 [] Run puppet on dbproxy1012 and dbproxy1014 and check the config `run-puppet-agent && cat /etc/haproxy/conf.d/db-master.cfg` [] Start the failover `!log Failover m1 from db1176 to db1164 - T329259` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1176 db1164 ``` [] 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 ``` [] kill connections on the old master (db1176) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [] Restart puppet on old and new masters (for heartbeat):db1164 and db1176 ` sudo cumin 'db1176* or db1164*' 'run-puppet-agent -e "primary switchover T329259"'` [] Check services affected (librenms, racktables, etherpad...) [] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1164 heartbeat -e "delete from heartbeat where file like 'db1176%';"` [] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/887885/ [] Create floating ticket for db1176 to be moved to m5: [] Update/resolve phabricator ticket about failover

db1176 is in row A and there will be a switch maintenance with hard downtime When: Monday 13th Feb - 11AM UTC 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: db1176 NEW MASTER: db1164 Check configuration differences between new and old master [x] `$ pt-config-diff h=db1176.eqiad.wmnet,F=/root/.my.cnf h=db1164.eqiad.wmnet,F=/root/.my.cnf ` [x] Silence alerts on all hosts [x] Topology changes: move everything under db1164 `db-switchover --timeout=1 --only-slave-move db1176.eqiad.wmnet db1164.eqiad.wmnet` [x] Disable puppet @db1164 and puppet @db1176 `sudo cumin 'db1176* or db1164*' 'disable-puppet "primary switchover T329259"'` [x] Merge gerrit: https://gerrit.wikimedia.org/r/c/operations/puppet/+/888359 [] Run puppet on dbproxy1012 and dbproxy1014 and check the config `run-puppet-agent && cat /etc/haproxy/conf.d/db-master.cfg` [] Start the failover `!log Failover m1 from db1176 to db1164 - T329259` ``` root@cumin1001:~/wmfmariadbpy/wmfmariadbpy# db-switchover --skip-slave-move db1176 db1164 ``` [] 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 ``` [] kill connections on the old master (db1176) ` pt-kill --print --kill --victims all --match-all F=/dev/null,S=/run/mysqld/mysqld.sock` [] Restart puppet on old and new masters (for heartbeat):db1164 and db1176 ` sudo cumin 'db1176* or db1164*' 'run-puppet-agent -e "primary switchover T329259"'` [] Check services affected (librenms, racktables, etherpad...) [] Clean orchestrator heartbeat to remove the old masters' one: `sudo db-mysql db1164 heartbeat -e "delete from heartbeat where file like 'db1176%';"` [] Merge backup ticket: https://gerrit.wikimedia.org/r/c/operations/puppet/+/887885/ [] Create floating ticket for db1176 to be moved to m5: [] Update/resolve phabricator ticket about failover