Database Upgrade

• Take site offline
• Stop chef on all database servers
• Stop postgres on master
• Stop postgres on slaves
• Ugrade master
  • sudo pg_upgradecluster -v <new-version> -m upgrade -k <old-version> main
• Update cookbooks/db/attributes/default.rb in chef to new version
• Run chef on master, wait for run to complete and check postgres is up and working
• Stop chef on master
• Stop postgres on master
• Sync tablespaces to slaves
  • cd /var/lib/postgresql
  • sudo rsync --verbose --archive --delete --hard-links --size-only --no-inc-recursive --no-inc-recursive --copy-dirlinks --keep-dirlinks <old-version> <new-version> root@slave:/var/lib/postgresql
  • cd /store/postgresql
  • sudo rsync --verbose --archive --delete --hard-links --size-only --no-inc-recursive --no-inc-recursive --copy-dirlinks --keep-dirlinks openstreetmap root@slave:/store/postgresql
  • sudo rsync --verbose --archive --delete --hard-links --size-only --no-inc-recursive --no-inc-recursive --copy-dirlinks --keep-dirlinks ssd root@slave:/store/postgresql
• Start postgres on master and check postgres is up and working
• Run chef on slaves, wait for run to complete and check postgres is up and working
• Drop old cluster sudo pg_dropcluster <old-version> main on each machine
• Bring site online