remove_containers.rb

#!/usr/bin/env ruby

# Don't remove devops containers that might be databases
def database_container?(line)
  line.match?(/postgres/) || line.match?(/redis/)
end

# docker ps -f "before=containerId" | grep expression > /var/tmp/containers.txt
File.open('/var/tmp/containers.txt').each do |line|
  next if database_container?(line)
  name = line.split.last 
  puts "Removing #{name}"
  system("docker rm -f #{name}")
end