Clone an EC11 System

clone-ec11-ha-system.md

These instructions are for an HA system specifically. To use for a Standalone, just replace the /var/opt/opscode/drbd/data path to /var/opt/opscode and ignore the stages for Secondary Backend and Frontends.

All commands as root

##On the Source EC 11.0.2 system

1. Shutdown the backend

    private-chef-ctl stop
   

2. Take a backup of the idle source Primary Backend

    tar -cvpf checkbackup-source.tar /etc/opscode /var/opt/opscode/drbd/data --exclude /etc/opscode/chef-server-running.js --exclude /etc/opscode/private-chef.rb
   

3. Copy the tar over to the destination Primary Backend

##Destination Primary Backend System

1. Shutdown all services but keepalived on the Primary backend

    for i in `private-chef-ctl status | awk '{print $2}' | cut -d ':' -f1,1 | grep -v keepalived`; do private-chef-ctl stop $i; done
   

2. Make a backup of the current system and save it somewhere safe

    tar -cvpf chefbackup-destination.tar /etc/opscode /var/opt/opscode/drbd/data
   

3. Delete all the current data

    rm -fr /var/opt/opscode/drbd/data
   

4. Extract the data from the source server. /etc/opscode/pivotal.pem should match source server, /etc/opscode/private-chef.rb should not.

    tar -xpf chefbackup-source.tar -C /
   

5. Startup

    private-chef-ctl start
   

6. Check for any issues in the database startup

    less /var/log/opscode/postgresql/9.2/current
   

##On the Destination Secondary Backend System

1. Copy the Primary Backend directory /etc/opscode here and overwrite all current stuff.

##On the Destination Frontends

1. Copy the Primary Backend directory /etc/opscode here and overwrite all current stuff. Reconfigure the systems. This should restart services.

    private-chef-ctl reconfigure
   

Please don't forget to copy the /etc/opscode directory from the current Primary Backend to the Secondary Backend in the Destination cluster. We didn't do that here, and it is needed for a failover to succeed.