Running operating system updates

Support team members with root access on all servers can help with running operating system updates (apt-get update && apt-get dist-upgrade).

Using freepuppet, there are two ways to do this:

• Upgrade one or more servers serially:

  freepuppet-helper au:viewsic
  freepuppet-helper au:mosh
  

• Upgrade multiple servers simultaneously:
  • Ensure you have cluster ssh installed:

    apt-get install clusterssh
    

  • Use freepuppet helper. The following example will open a series of 12 simultaneous ssh connections to mosh servers. There will be one window to type a command that will be executed on all servers at the same time. Type: apt-get update followed by apt-get dist-upgrade. Once it is complete on all servers, type: exit. Once all connections are closed, it will open the next 12 until all mosh servers have been opened.

    freepuppet-helper ce:mosh
    

Whenever possible, run updates after 10:00 pm America/New_York during the working week or anytime on the weekend.