Class: Docker::Compose::Session

Inherits:
Object
  • Object
show all
Defined in:
lib/docker/compose/session.rb

Overview

A Ruby OOP interface to a docker-compose session. A session is bound to a particular directory and docker-compose file (which are set at initialize time) and invokes whichever docker-compose command is resident in $PATH.

Run docker-compose commands by calling instance methods of this class and passing kwargs that are equivalent to the CLI options you would pass to the command-line tool.

Note that the Ruby command methods usually expose a subset of the options allowed by the docker-compose CLI, and that options are sometimes renamed for clarity, e.g. the “-d” flag always becomes the “detached:” kwarg.

Constant Summary collapse

ANSI =

A Regex that matches all ANSI escape sequences.

/\033\[([0-9];?)+[a-z]/

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(shell = Backticks::Runner.new(buffered: [:stderr], interactive: true), dir: Dir.pwd, file: 'docker-compose.yml') ⇒ Session 



27
28
29
30
31
32
 
# File 'lib/docker/compose/session.rb', line 27

def initialize(shell = Backticks::Runner.new(buffered: [:stderr], interactive: true),
               dir: Dir.pwd, file: 'docker-compose.yml')
  @shell = shell
  @dir = dir
  @file = file
end

Instance Attribute Details

#dir ⇒ Object (readonly)

Working directory (determines compose project name); default is Dir.pwd



22
23
24
 
# File 'lib/docker/compose/session.rb', line 22

def dir
  @dir
end

#file ⇒ Object (readonly)

Project file; default is ‘docker-compose.yml’



25
26
27
 
# File 'lib/docker/compose/session.rb', line 25

def file
  @file
end

Instance Method Details

#build(*services, force_rm: false, no_cache: false, pull: false) ⇒ Object 



204
205
206
207
208
209
 
# File 'lib/docker/compose/session.rb', line 204

def build(*services, force_rm: false, no_cache: false, pull: false)
  o = opts(force_rm: [force_rm, false],
           no_cache: [no_cache, false],
           pull: [pull, false])
  result = run!('build', o, services)
end

#config(*args) ⇒ Hash

Validate docker-compose file and return it as Hash

Raises:

  • (Error) —

    if command fails



37
38
39
40
 
# File 'lib/docker/compose/session.rb', line 37

def config(*args)
  config = run!('config', *args)
  YAML.load(config)
end

#down ⇒ Object

Take the stack down



91
92
93
 
# File 'lib/docker/compose/session.rb', line 91

def down
  run!('down')
end

#kill(*services, signal: 'KILL') ⇒ Object

Forcibly stop running services.

See Also:

  • for a list of acceptable signal names


152
153
154
155
 
# File 'lib/docker/compose/session.rb', line 152

def kill(*services, signal: 'KILL')
  o = opts(signal: [signal, 'KILL'])
  run!('kill', o, services)
end

#logs(*services) ⇒ true

Monitor the logs of one or more containers.

Raises:

  • (Error) —

    if command fails



46
47
48
49
 
# File 'lib/docker/compose/session.rb', line 46

def logs(*services)
  run!('logs', services)
  true
end

#pause(*services) ⇒ Object

Pause running services.



129
130
131
 
# File 'lib/docker/compose/session.rb', line 129

def pause(*services)
  run!('pause', *services)
end

#port(service, port, protocol: 'tcp', index: 1) ⇒ String?

Figure out which interface(s) and port a given service port has been published to.

NOTE: if Docker Compose is communicating with a remote Docker host, this method returns IP addresses from the point of view of that host and its interfaces. If you need to know the address as reachable from localhost, you probably want to use ‘Mapper`.

Raises:

  • (Error) —

    if command fails

See Also:



172
173
174
175
176
177
178
179
180
181
 
# File 'lib/docker/compose/session.rb', line 172

def port(service, port, protocol: 'tcp', index: 1)
  inter = @shell.interactive
  @shell.interactive = false

  o = opts(protocol: [protocol, 'tcp'], index: [index, 1])
  s = strip_ansi(run!('port', o, service, port).strip)
  (!s.empty? && s) || nil
ensure
  @shell.interactive = inter
end

#ps(*services) ⇒ Object 



51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/docker/compose/session.rb', line 51

def ps(*services)
  inter = @shell.interactive
  @shell.interactive = false

  lines = run!('ps', {q: true}, services).split(/[\r\n]+/)
  containers = Collection.new

  lines.each do |id|
    containers << docker_ps(strip_ansi(id))
  end

  containers
ensure
  @shell.interactive = inter
end

#pull(*services) ⇒ Object

Pull images of services



97
98
99
 
# File 'lib/docker/compose/session.rb', line 97

def pull(*services)
  run!('pull', *services)
end

#restart(*services, timeout: 10) ⇒ Object 



122
123
124
125
 
# File 'lib/docker/compose/session.rb', line 122

def restart(*services, timeout:10)
  o = opts(timeout: [timeout, 10])
  run!('restart', o, *services)
end

#rm(*services, force: false, volumes: false) ⇒ Object 



101
102
103
104
 
# File 'lib/docker/compose/session.rb', line 101

def rm(*services, force: false, volumes: false)
  o = opts(f: [force, false], v: [volumes, false])
  run!('rm', o, services)
end

#run(service, *cmd, detached: false, no_deps: false, env: [], rm: false) ⇒ Object

Idempotently run an arbitrary command with a service container.

Raises:

  • (Error) —

    if command fails



116
117
118
119
120
 
# File 'lib/docker/compose/session.rb', line 116

def run(service, *cmd, detached: false, no_deps: false, env: [], rm: false)
  o = opts(detached: [detached, false], no_deps: [no_deps, false], env: [env, []], rm: [rm, false])
  env_params = env.map { |v| { e: v } }
  run!('run', o, *env_params, service, cmd)
end

#run!(*args) ⇒ String

Run a docker-compose command without validating that the CLI parameters make sense. Prepend project and file options if suitable.

Raises:

  • (Error) —

    if command fails

See Also:

  • Docker::Compose::Shell#command


220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
 
# File 'lib/docker/compose/session.rb', line 220

def run!(*args)
  file_args = case @file
  when 'docker-compose.yml'
    []
  when Array
    # backticks sugar can't handle array values; build a list of hashes
    # IMPORTANT: preserve the order of the files so overrides work correctly
    file_args = @file.map { |filepath| { :file => filepath } }
  else
    # a single String (or Pathname, etc); use normal sugar to add it
    [{ file: @file.to_s }]
  end

  @shell.chdir = dir
  cmd = @shell.run('docker-compose', *file_args, *args).join
  status = cmd.status
  out = cmd.captured_output
  err = cmd.captured_error
  status.success? || fail(Error.new(args.first, status, out+err))
  out
end

#stop(*services, timeout: 10) ⇒ Object

Stop running services.

Raises:

  • (Error) —

    if command fails



143
144
145
146
 
# File 'lib/docker/compose/session.rb', line 143

def stop(*services, timeout: 10)
  o = opts(timeout: [timeout, 10])
  run!('stop', o, services)
end

#unpause(*services) ⇒ Object

Unpause running services.



135
136
137
 
# File 'lib/docker/compose/session.rb', line 135

def unpause(*services)
  run!('unpause', *services)
end

#up(*services, detached: false, timeout: 10, build: false, no_build: false, no_deps: false) ⇒ true

Idempotently up the given services in the project.

Raises:

  • (Error) —

    if command fails



79
80
81
82
83
84
85
86
87
88
 
# File 'lib/docker/compose/session.rb', line 79

def up(*services,
       detached: false, timeout: 10, build: false, no_build: false, no_deps: false)
  o = opts(d: [detached, false],
           timeout: [timeout, 10],
           build: [build, false],
           no_build: [no_build, false],
           no_deps: [no_deps, false])
  run!('up', o, services)
  true
end

#version(short: false) ⇒ String, Hash

Determine the installed version of docker-compose.

Raises:

  • (Error) —

    if command fails



188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
 
# File 'lib/docker/compose/session.rb', line 188

def version(short: false)
  o = opts(short: [short, false])
  result = run!('version', o, file: false, dir: false)

  if short
    result.strip
  else
    lines = result.split(/[\r\n]+/)
    lines.inject({}) do |h, line|
      kv = line.split(/: +/, 2)
      h[kv.first] = kv.last
      h
    end
  end
end