Web Site Migration

In advance

• Do initial rsync of /store/rails [can repeat as needed]

On the day

• Switch site to read only mode using new master
  • Includes move of gpx-import role
• Update DNS to point at new site
• Stop chef and gpx-import on old server
• Do final rsync of /store/rails
• Move gpx-import role to new site
• Run chef on old and new gpx import servers
• Stop chef on all database servers
• Stop postgres on the master database
• Switch roles for old and new master in chef
• Run chef on new master and wait for run to complete
  • Check postgres is up in master mode
• Run chef on other database servers and wait for run to complete
  • Check postgres is up and connected to master
• Switch site to read/write mode