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.



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# 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

#clean ⇒ Object 



168
169
170
 
# File 'lib/docker-sync/sync_strategy/rsync.rb', line 168

def clean
  reset_container
end

#get_container_name ⇒ Object 



89
90
91
 
# File 'lib/docker-sync/sync_strategy/rsync.rb', line 89

def get_container_name
  return "#{@sync_name}"
end

#get_docker_env ⇒ Object 



150
151
152
153
154
155
156
 
# 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_mapping ⇒ Object 



141
142
143
144
145
146
147
148
 
# 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_mapping ⇒ Object 



133
134
135
136
137
138
139
 
# 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_name ⇒ Object 



93
94
95
 
# File 'lib/docker-sync/sync_strategy/rsync.rb', line 93

def get_volume_name
  return @sync_name
end

#health_check ⇒ Object

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



75
76
77
78
79
80
81
82
83
84
85
86
87
 
# 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_container ⇒ Object 



162
163
164
165
166
 
# 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

#run ⇒ Object 



32
33
34
35
 
# File 'lib/docker-sync/sync_strategy/rsync.rb', line 32

def run
  start_container
  sync
end

#start_container ⇒ Object

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



100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
 
# 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

#stop ⇒ Object 



172
173
174
175
176
177
178
179
180
 
# 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_container ⇒ Object 



158
159
160
 
# 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

#sync ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# 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_options ⇒ Object 



58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
 
# 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