Class: EY::Serverside::DeployBase

Inherits:
Task
  • Object
show all
Includes:
EY::Serverside::DependencyManager::LegacyHelpers
Defined in:
lib/engineyard-serverside/deploy.rb

Direct Known Subclasses

Deploy

Instance Attribute Summary

Attributes inherited from Task

#config, #servers, #shell

Instance Method Summary collapse

Methods inherited from Task

#initialize, #load_ey_yml, #paths, #require_custom_tasks, #roles, #run, #sudo

Constructor Details

This class inherits a constructor from EY::Serverside::Task

Instance Method Details

#abort_on_bad_paths_in_release_directory ⇒ Object 



214
215
216
217
218
219
220
221
222
223
224
225
 
# File 'lib/engineyard-serverside/deploy.rb', line 214

def abort_on_bad_paths_in_release_directory
  shell.substatus "Checking for disruptive files in #{paths.releases}"

  bad_paths = paths.all_releases.reject do |path|
    path.basename.to_s =~ /^[\d]+$/
  end

  if bad_paths.any?
    shell.fatal "Bad paths found in #{paths.releases}:\n\t#{bad_paths.join("\n\t")}\nStoring files in this directory will disrupt latest_release, diff detection, rollback, and possibly other features."
    raise
  end
end

#bundle ⇒ Object 



96
97
98
 
# File 'lib/engineyard-serverside/deploy.rb', line 96

def bundle
  install_dependencies
end

#cached_deploy ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/engineyard-serverside/deploy.rb', line 23

def cached_deploy
  shell.status "Deploying app from cached copy at #{Time.now.asctime}"
  load_ey_yml
  require_custom_tasks
  push_code

  shell.status "Starting full deploy"

  new_release do
    callback(:before_deploy)
    check_repository
    create_revision_file
    run_with_callbacks(:bundle)
    setup_services
    configure_platform
    symlink_configs
    setup_sqlite3_if_necessary
    run_with_callbacks(:compile_assets)
    enable_maintenance_page
    run_with_callbacks(:migrate)
    callback(:before_symlink)
    # We don't use run_with_callbacks for symlink because we need
    # to clean up manually if it fails.
    symlink
  end

  callback(:after_symlink)
  run_with_callbacks(:restart)
  disable_maintenance_page

  cleanup_old_releases
  gc_repository_cache
  callback(:after_deploy)
  shell.status "Finished deploy at #{Time.now.asctime}"
rescue Exception => e
  shell.status "Finished failing to deploy at #{Time.now.asctime}"
  shell.error "Exception during deploy: #{e.inspect}\n#{e.backtrace}"
  puts_deploy_failure
  raise
end

#callback(what) ⇒ Object 



454
455
456
457
 
# File 'lib/engineyard-serverside/deploy.rb', line 454

def callback(what)
  @callbacks_reached ||= true
  Callbacks::Distributor.distribute(self, what)
end

#check_dependencies ⇒ Object 



88
89
90
 
# File 'lib/engineyard-serverside/deploy.rb', line 88

def check_dependencies
  dependency_manager.check
end

#check_repository ⇒ Object 



84
85
86
 
# File 'lib/engineyard-serverside/deploy.rb', line 84

def check_repository
  check_dependencies
end

#clean_release_directory(dir, count) ⇒ Object

Remove all but the most-recent count releases from the specified release directory. IMPORTANT: This expects the release directory naming convention to be something with a sensible lexical order. Violate that at your peril.



206
207
208
209
210
211
212
 
# File 'lib/engineyard-serverside/deploy.rb', line 206

def clean_release_directory(dir, count)
  @cleanup_failed = true
  ordinal = count.succ.to_s
  shell.status "Cleaning release directory: #{dir}"
  sudo "ls -r #{dir} | tail -n +#{ordinal} | xargs -I@ rm -rf #{dir}/@"
  @cleanup_failed = false
end

#cleanup_old_releases ⇒ Object

task



192
193
194
195
196
197
198
199
200
 
# File 'lib/engineyard-serverside/deploy.rb', line 192

def cleanup_old_releases
  count = config.keep_releases.to_i
  if count < 1
    shell.error "Refusing to delete all releases! keep_releases must be >= 1 (got #{count})"
    count = EY::Serverside::Deploy::Configuration::DEFAULT_KEEP_RELEASES
    shell.warning "Running instead with default value for keep_releases: #{count}"
  end
  clean_release_directory(paths.releases, count)
end

#configure_command ⇒ Object 



351
352
353
354
355
356
357
358
359
360
 
# File 'lib/engineyard-serverside/deploy.rb', line 351

def configure_command
  ENV['EY_SERVERSIDE_CONFIGURE_COMMAND'] || begin
    configure_script = "/engineyard/bin/app_#{config.app}_configure"
    return "if [ -x \"\#{configure_script}\" ] || which \"\#{configure_script}\" >/dev/null 2>&1; then\n  EY_DEPLOY_APP='\#{config.app}' EY_DEPLOY_RELEASE_PATH='\#{paths.active_release.to_s}' \#{configure_script};\nfi\n    CONFIGURE\n  end\nend\n"

#configure_platform ⇒ Object 



347
348
349
 
# File 'lib/engineyard-serverside/deploy.rb', line 347

def configure_platform
  run configure_command
end

#copy_repository_cache ⇒ Object

task



277
278
279
280
281
282
 
# File 'lib/engineyard-serverside/deploy.rb', line 277

def copy_repository_cache
  paths.new_release!
  shell.status "Copying to #{paths.active_release}"
  exclusions = Array(config.copy_exclude).map { |e| %|--exclude="#{e}"| }.join(' ')
  run("mkdir -p #{paths.active_release} #{paths.shared_config} && rsync -aq #{exclusions} #{paths.repository_cache}/ #{paths.active_release}")
end

#create_revision_file ⇒ Object 



284
285
286
 
# File 'lib/engineyard-serverside/deploy.rb', line 284

def create_revision_file
  run create_revision_file_command
end

#create_revision_file_command ⇒ Object 



72
73
74
 
# File 'lib/engineyard-serverside/deploy.rb', line 72

def create_revision_file_command
  source.create_revision_file_command(paths.active_revision)
end

#deploy ⇒ Object

default task



17
18
19
20
21
 
# File 'lib/engineyard-serverside/deploy.rb', line 17

def deploy
  shell.status "Starting deploy at #{shell.start_time.asctime}"
  update_repository_cache
  cached_deploy
end

#disable_maintenance_page ⇒ Object 



116
117
118
 
# File 'lib/engineyard-serverside/deploy.rb', line 116

def disable_maintenance_page
  maintenance.conditionally_disable
end

#enable_maintenance_page ⇒ Object 



112
113
114
 
# File 'lib/engineyard-serverside/deploy.rb', line 112

def enable_maintenance_page
  maintenance.conditionally_enable
end

#ensure_git_ssh_wrapper ⇒ Object 



156
157
158
 
# File 'lib/engineyard-serverside/deploy.rb', line 156

def ensure_git_ssh_wrapper
  ENV['GIT_SSH'] = ssh_executable.to_s
end

#ensure_ownership(*targets) ⇒ Object 



439
440
441
 
# File 'lib/engineyard-serverside/deploy.rb', line 439

def ensure_ownership(*targets)
  sudo %|find #{targets.join(' ')} \\( -not -user #{config.user} -or -not -group #{config.group} \\) -exec chown #{config.user}:#{config.group} "{}" +|
end

#gc_repository_cache ⇒ Object 



68
69
70
 
# File 'lib/engineyard-serverside/deploy.rb', line 68

def gc_repository_cache
  source.gc_repository_cache if config.gc?
end

#generate_ssh_wrapper ⇒ Object

We specify ‘IdentitiesOnly’ to avoid failures on systems with > 5 private keys available. We set UserKnownHostsFile to /dev/null because StrickHostKeyChecking no doesn’t ignore existing entries in known_hosts; we want to actively ignore all such. Learned this at lists.mindrot.org/pipermail/openssh-unix-dev/2009-February/027271.html (Thanks Jim L.)



175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
 
# File 'lib/engineyard-serverside/deploy.rb', line 175

def generate_ssh_wrapper
  path = paths.ssh_wrapper
  "mkdir -p \#{path.dirname}\n[ -x \#{path} ] || cat > \#{path} <<'SSH'\n#!/bin/sh\nunset SSH_AUTH_SOCK\n\n# Filter command mangling by git when using `GIT_SSH` and the string `plink`\ncommand=$(echo \"$*\" | sed -e \"s/^-batch //\")\nssh -o CheckHostIP=no -o StrictHostKeyChecking=no -o PasswordAuthentication=no -o LogLevel=INFO -o IdentityFile=\#{paths.deploy_key} -o IdentitiesOnly=yes ${command}\nSSH\nchmod 0700 \#{path}\n  SCRIPT\nend\n"

#install_dependencies ⇒ Object 



100
101
102
 
# File 'lib/engineyard-serverside/deploy.rb', line 100

def install_dependencies
  dependency_manager.install
end

#migrate ⇒ Object

task



257
258
259
260
261
262
263
264
265
 
# File 'lib/engineyard-serverside/deploy.rb', line 257

def migrate
  return unless config.migrate?
  @migrations_reached = true
  cmd = "cd #{paths.active_release} && PATH=#{paths.binstubs}:$PATH #{config.framework_envs} #{config.migration_command}"
  roles :app_master, :solo do
    shell.status "Migrating: #{cmd}"
    run(cmd)
  end
end

#move_symlink(source, link, name) ⇒ Object

Move a symlink as atomically as we can.

mv -T renames ‘next’ to ‘current’ instead of moving ‘next’ to current/next’ mv -T isn’t available on OS X and maybe elsewhere, so fallback to rm && ln



447
448
449
450
451
452
 
# File 'lib/engineyard-serverside/deploy.rb', line 447

def move_symlink(source, link, name)
  next_link = link.dirname.join(name)
  mv_t  = "ln -nfs #{source} #{next_link} && mv -T #{next_link} #{link} >/dev/null 2>&1"
  rm_ln = "rm -rf #{next_link} #{link} && ln -nfs #{source} #{link}"
  "((#{mv_t}) || (#{rm_ln}))"
end

#new_release(&block) ⇒ Object 



267
268
269
270
271
272
273
274
 
# File 'lib/engineyard-serverside/deploy.rb', line 267

def new_release(&block)
  copy_repository_cache
  with_failed_release_cleanup do
    shell.status "Ensuring proper ownership."
    ensure_ownership(paths.active_release)
    block.call
  end
end

#push_code ⇒ Object

task



127
128
129
130
131
132
 
# File 'lib/engineyard-serverside/deploy.rb', line 127

def push_code
  shell.status "Pushing code to all servers"
  servers.remote.run_for_each do |server|
    server.sync_directory_command(paths.repository_cache)
  end
end

#rails_application? ⇒ Boolean

Returns:

  • (Boolean) 


92
93
94
 
# File 'lib/engineyard-serverside/deploy.rb', line 92

def rails_application?
  dependency_manager.rails_version
end

#restart ⇒ Object

task



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
 
# File 'lib/engineyard-serverside/deploy.rb', line 135

def restart
  @restart_failed = true
  if config.restart_groups.to_i > 1
    shell.status "Restarting app servers in #{config.restart_groups.to_i} groups"
  else
    shell.status "Restarting app servers"
  end

  servers.roles(:app_master, :app, :solo).in_groups(config.restart_groups.to_i) do |group|
    shell.substatus "Restarting #{group.size} server#{group.size == 1 ? '' : 's'}"
    group.run(restart_command)
  end

  shell.status "Finished restarting app servers"
  @restart_failed = false
end

#restart_command ⇒ Object 



152
153
154
 
# File 'lib/engineyard-serverside/deploy.rb', line 152

def restart_command
  %{LANG="en_US.UTF-8" /engineyard/bin/app_#{config.app} deploy}
end

#restart_with_maintenance_page ⇒ Object 



104
105
106
107
108
109
110
 
# File 'lib/engineyard-serverside/deploy.rb', line 104

def restart_with_maintenance_page
  load_ey_yml
  require_custom_tasks
  enable_maintenance_page
  restart
  disable_maintenance_page
end

#rollback ⇒ Object

task



229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
 
# File 'lib/engineyard-serverside/deploy.rb', line 229

def rollback
  if config.rollback_paths!
    begin
      load_ey_yml
      require_custom_tasks
      rolled_back_release = paths.latest_release
      shell.status "Rolling back to previous release: #{short_log_message(config.active_revision)}"
      abort_on_bad_paths_in_release_directory
      run_with_callbacks(:symlink)
      sudo "rm -rf #{rolled_back_release}"
      bundle
      shell.status "Restarting with previous release."
      enable_maintenance_page
      run_with_callbacks(:restart)
      disable_maintenance_page
      shell.status "Finished rollback at #{Time.now.asctime}"
    rescue Exception
      shell.status "Failed to rollback at #{Time.now.asctime}"
      puts_deploy_failure
      raise
    end
  else
    shell.fatal "Already at oldest release, nothing to roll back to."
    exit(1)
  end
end

#run_with_callbacks(task) ⇒ Object 



120
121
122
123
124
 
# File 'lib/engineyard-serverside/deploy.rb', line 120

def run_with_callbacks(task)
  callback("before_#{task}")
  send(task)
  callback("after_#{task}")
end

#setup_services ⇒ Object 



288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
 
# File 'lib/engineyard-serverside/deploy.rb', line 288

def setup_services
  shell.status "Setting up external services."
  previously_configured_services = config.configured_services

  begin
    sudo(config.services_check_command)
  rescue EY::Serverside::RemoteFailure
    shell.info "Could not setup services. Upgrade your environment to get services configuration."
    return
  end

  begin
    sudo(config.services_setup_command)
  rescue EY::Serverside::RemoteFailure => e
    if previously_configured_services
      shell.warning "External services configuration not updated. Using previous version.\nDeploy again if your services configuration appears incomplete or out of date.\n\#{e}\n      WARNING\n    end\n  end\n\n  if services = config.configured_services\n    shell.status \"Services configured: \#{services.join(', ')}\"\n    dependency_manager.show_ey_config_instructions\n  end\nend\n"

#setup_shared_tmp ⇒ Object 



376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
 
# File 'lib/engineyard-serverside/deploy.rb', line 376

def setup_shared_tmp
  if config.shared_tmp?
    shell.substatus "Creating and symlinking shared tmp directory if empty"
    run "if [ -e \"\#{paths.active_tmp}\" ] && [ ! \"$(ls \#{paths.active_tmp} 2>&1)\" ]; then\n  rm -rf \#{paths.active_tmp};\nfi;\nif [ ! -e \"\#{paths.active_tmp}\" ]; then\n  mkdir -p \#{paths.shared_tmp} && ln -nfs \#{paths.shared_tmp} \#{paths.active_tmp};\nfi\n    SETUP_TMP\n\n    unless paths.active_tmp.symlink?\n      note = \"This application's repository has tmp/ with contents committed.\\n\"\n      if config.precompile_assets?\n        note << \"Asset precompile speed can be increased by sharing tmp across releases.\\n\"\n      end\n      note << <<-NOTICE\nEnable shared tmp with the follow git command (if applicable):\n\n  $ git rm -r tmp/* && echo '*' > tmp/.gitignore\n\nOr, disable this feature via ey.yml configuration as follows:\n\ndefaults:\n  shared_tmp: false\n      NOTICE\n      shell.notice note\n    end\n  else\n    shell.substatus \"Prepare shared pids directory\"\n    run \"rm -rf \#{paths.active_tmp}/pids\"\n  end\nend\n"

#setup_sqlite3_if_necessary ⇒ Object 



317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
 
# File 'lib/engineyard-serverside/deploy.rb', line 317

def setup_sqlite3_if_necessary
  if dependency_manager.uses_sqlite3?
    shell.status "Setting up SQLite3 Database for compatibility with application's chosen adapter"
    shell.warning "SQLite3 cannot persist across servers. Please upgrade to a supported database."

    shell.substatus "Create databases directory if needed"
    run "mkdir -p #{paths.shared}/databases"

    shell.substatus "Create SQLite database if needed"
    run "touch #{paths.shared}/databases/#{config.framework_env}.sqlite3"

    shell.substatus "Create config directory if needed"
    run "mkdir -p #{paths.active_release_config}"

    shell.substatus "Generating SQLite config"
    run "cat > \#{paths.shared_config}/database.sqlite3.yml<<'YML'\n\#{config.framework_env}:\n  adapter: sqlite3\n  database: \#{paths.shared}/databases/\#{config.framework_env}.sqlite3\n  pool: 5\n  timeout: 5000\nYML\n    WRAP\n\n    shell.substatus \"Symlink database.yml\"\n    run \"ln -nfs \#{paths.shared_config}/database.sqlite3.yml \#{paths.active_release_config}/database.yml\"\n  end\nend\n"

#short_log_message(revision) ⇒ Object 



76
77
78
 
# File 'lib/engineyard-serverside/deploy.rb', line 76

def short_log_message(revision)
  source.short_log_message(revision)
end

#source ⇒ Object 



459
460
461
462
 
# File 'lib/engineyard-serverside/deploy.rb', line 459

def source
  ensure_git_ssh_wrapper
  @source ||= config.source(shell)
end

#ssh_executable ⇒ Object

create ssh wrapper on all servers



161
162
163
164
165
166
167
168
 
# File 'lib/engineyard-serverside/deploy.rb', line 161

def ssh_executable
  @ssh_executable ||= begin
                        roles :app_master, :app, :solo, :util do
                          run(generate_ssh_wrapper)
                        end
                        paths.ssh_wrapper
                      end
end

#symlink ⇒ Object

task



427
428
429
430
431
432
433
434
435
436
437
 
# File 'lib/engineyard-serverside/deploy.rb', line 427

def symlink
  shell.status "Symlinking code."
  run move_symlink(paths.active_release, paths.current, "deploying")
  ensure_ownership(paths.current)
  @symlink_changed = true
rescue Exception
  sudo move_symlink(paths.previous_release(paths.active_release), paths.current, "reverting")
  ensure_ownership(paths.current)
  @symlink_changed = false
  raise
end

#symlink_configs ⇒ Object 



362
363
364
365
366
367
368
369
370
371
372
373
374
 
# File 'lib/engineyard-serverside/deploy.rb', line 362

def symlink_configs
  shell.status "Preparing shared resources for release."

  shell.substatus "Set group write permissions"
  run "chmod -R g+w #{paths.active_release}"

  setup_shared_tmp

  symlink_tasks.each do |what, cmd|
    shell.substatus what
    run(cmd)
  end
end

#symlink_tasks ⇒ Object 



411
412
413
414
415
416
417
418
419
420
421
422
423
424
 
# File 'lib/engineyard-serverside/deploy.rb', line 411

def symlink_tasks
  [
    ["Symlink shared pids directory",         "ln -nfs #{paths.shared}/pids #{paths.active_tmp}/pids"],
    ["Symlink shared log directory",          "rm -rf #{paths.active_log} && ln -nfs #{paths.shared_log} #{paths.active_log}"],
    ["Remove public/system if symlinked",     "if [ -L \"#{paths.public_system}\" ]; then rm -rf #{paths.public_system}; fi"],
    ["Create public directory",               "mkdir -p #{paths.public}"],
    ["Symlink public system directory",       "if [ ! -e \"#{paths.public_system}\" ]; then ln -ns #{paths.shared_system} #{paths.public_system}; fi"],
    ["Create config directory",               "mkdir -p #{paths.active_release_config}"],
    ["Symlink other shared config files",     "find #{paths.shared_config} -maxdepth 1 -type f -not -name 'database.yml' -exec ln -s {} #{paths.active_release_config} \\;"],
    ["Symlink database.yml if needed",        "if [ -f \"#{paths.shared_config}/database.yml\" ]; then ln -nfs #{paths.shared_config}/database.yml #{paths.active_release_config}/database.yml; fi"],
    ["Symlink newrelic.yml if needed",        "if [ -f \"#{paths.shared_config}/newrelic.yml\" ]; then ln -nfs #{paths.shared_config}/newrelic.yml #{paths.active_release_config}/newrelic.yml; fi"],
    ["Symlink mongrel_cluster.yml if needed", "if [ -f \"#{paths.shared_config}/mongrel_cluster.yml\" ]; then ln -nfs #{paths.shared_config}/mongrel_cluster.yml #{paths.active_release_config}/mongrel_cluster.yml; fi"],
  ]
end

#unchanged_diff_between_revisions?(previous_revision, active_revision, asset_dependencies) ⇒ Boolean

Returns:

  • (Boolean) 


80
81
82
 
# File 'lib/engineyard-serverside/deploy.rb', line 80

def unchanged_diff_between_revisions?(previous_revision, active_revision, asset_dependencies)
  source.same?(previous_revision, active_revision, asset_dependencies)
end

#update_repository_cache ⇒ Object 



64
65
66
 
# File 'lib/engineyard-serverside/deploy.rb', line 64

def update_repository_cache
  source.update_repository_cache
end