Class: DockerSync::SyncStrategy::Rsync

Inherits:
Object
  • Object
show all
Includes:
Thor::Shell
Defined in:
lib/docker-sync/sync_strategy/rsync.rb

Instance Method Summary collapse

Constructor Details

#initialize(sync_name, options) ⇒ Rsync

Returns a new instance of Rsync.


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 13

def initialize(sync_name, options)
  @sync_name = sync_name
  @options = options
  # if a custom image is set, apply it
  if @options.key?('image')
    @docker_image = @options['image']
  else
    @docker_image = 'eugenmayer/rsync'
  end

  begin
    Dependencies::Rsync.ensure!
  rescue StandardError => e
    say_status 'error', "#{@sync_name} has been configured to sync with rsync, but no rsync or fswatch binary available", :red
    say_status 'error', e.message, :red
    exit 1
  end
end

Instance Method Details

#cleanObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 168

def clean
  reset_container
end

#get_container_nameObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 89

def get_container_name
  return "#{@sync_name}"
end

#get_docker_envObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 150

def get_docker_env
  env_mapping = []
  env_mapping << "-e VOLUME=#{@options['dest']}"
  env_mapping << "-e TZ=$(basename $(dirname `readlink /etc/localtime`))/$(basename `readlink /etc/localtime`)"
  env_mapping << "-e ALLOW=#{@options['sync_host_allow']}" if @options['sync_host_allow']
  env_mapping.join(' ')
end

#get_group_mappingObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 141

def get_group_mapping
  group_mapping = ''
  if @options.key?('sync_groupid')
    raise 'for now, rsync does no longer support groupid, but for nearly all cases sync_userid should be enough'
    #group_mapping = "#{group_mapping} -e GROUP_ID=#{@options['sync_groupid']}"
  end
  return group_mapping
end

#get_user_mappingObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 133

def get_user_mapping
  user_mapping = ''
  if @options.key?('sync_userid')
    user_mapping = "#{user_mapping} -e OWNER_UID=#{@options['sync_userid']}"
  end
  return user_mapping
end

#get_volume_nameObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 93

def get_volume_name
  return @sync_name
end

#health_checkObject

sleep until rsync –dry-run succeeds in connecting to the daemon on the configured IP and port.


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 75

def health_check
  health_check_cmd = "rsync --dry-run rsync://#{@options['sync_host_ip']}:#{@options['sync_host_port']}:: 2> /dev/null"

  retry_counter = 0
  
  health_check_status = `#{health_check_cmd}`
  while health_check_status == '' && retry_counter < 10 do
    say_status 'ok', "waiting for rsync daemon on rsync://#{@options['sync_host_ip']}:#{@options['sync_host_port']}", :white if @options['verbose']
    retry_counter += 1
    health_check_status = `#{health_check_cmd}`
    sleep 1
  end
end

#reset_containerObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 162

def reset_container
  stop_container
  `docker ps -a | grep #{get_container_name} && docker rm #{get_container_name}`
  `docker volume ls -q | grep #{get_volume_name} && docker volume rm #{get_volume_name}`
end

#runObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 32

def run
  start_container
  sync
end

#start_containerObject

starts a rsync docker container listening on the specific port this container exposes a named volume and is on one side used as the rsync-endpoint for the local rsync command, on the other side the volume is mounted into the app-container to share the code / content


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 100

def start_container
  say_status 'ok', "Starting rsync for sync #{@sync_name}", :white

  container_name = get_container_name
  volume_name = get_volume_name
  running = `docker ps --filter 'status=running' --filter 'name=#{container_name}' --format "{{.Names}}" | grep '^#{container_name}$'`
  if running == '' # container is yet not running
    say_status 'ok', "#{container_name} container not running", :white if @options['verbose']
    exists = `docker ps --filter "status=exited" --filter "name=#{container_name}" --format "{{.Names}}" | grep '^#{container_name}$'`
    if exists == '' # container has yet not been created
      say_status 'ok', "creating #{container_name} container", :white if @options['verbose']

      user_mapping = get_user_mapping
      group_mapping = get_group_mapping
      docker_env = get_docker_env

      cmd = "docker run -p '#{@options['sync_host_port']}:873' -v #{volume_name}:#{@options['dest']} #{user_mapping} #{group_mapping} #{docker_env} --name #{container_name} -d #{@docker_image}"
    else # container already created, just start / reuse it
      say_status 'ok', "starting #{container_name} container", :white if @options['verbose']
      cmd = "docker start #{container_name}"
    end
    say_status 'command', cmd, :white if @options['verbose']
    `#{cmd}` || raise('Start failed')
  else
    say_status 'ok', "#{container_name} container still running", :blue if @options['verbose']
  end
  say_status 'ok', "#{container_name}: starting initial sync of #{@options['src']}", :white if @options['verbose']

  health_check
  sync
  say_status 'success', 'Rsync server started', :green
end

#stopObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 172

def stop
  say_status 'ok', "Stopping sync container #{get_container_name}"
  begin
    stop_container
  rescue StandardError => e
    say_status 'error', "Stopping failed of #{get_container_name}:", :red
    puts e.message
  end
end

#stop_containerObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 158

def stop_container
  `docker ps | grep #{get_container_name} && docker stop #{get_container_name}`
end

#syncObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 37

def sync
  args = sync_options
  cmd = 'rsync ' + args.join(' ')

  say_status 'command', cmd, :white if @options['verbose']

  out = `#{cmd}`
  if $?.exitstatus > 0
    say_status 'error', "Error starting sync, exit code #{$?.exitstatus}", :red
    say_status 'message', out
  else
    TerminalNotifier.notify(
      "Synced #{@options['src']}", :title => @sync_name
    ) if @options['notify_terminal']
    say_status 'ok', "Synced #{@options['src']}", :white
    if @options['verbose']
      say_status 'output', out
    end
  end
end

#sync_optionsObject


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# File 'lib/docker-sync/sync_strategy/rsync.rb', line 58

def sync_options
  args = []
  unless @options['sync_excludes'].nil?
    args = @options['sync_excludes'].map { |pattern| "--exclude='#{pattern}'" } + args
  end
  args.push('-ap')
  args.push(@options['sync_args']) if @options.key?('sync_args')
  # we do not need to user usermap/groupmap since we started our container the way that it also maps user/group like we defined
  # in the config - see start_container
  #args.push("--usermap='*:#{@options['sync_user']}'") if @options.key?('sync_user')
  #args.push("--groupmap='*:#{@options['sync_group']}'") if @options.key?('sync_group')
  args.push("'#{@options['src']}'")
  args.push("rsync://#{@options['sync_host_ip']}:#{@options['sync_host_port']}/volume")
  return args
end