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 



211
212
213
214
215
216
217
218
219
220
221
222
 
# File 'lib/engineyard-serverside/deploy.rb', line 211

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 



93
94
95
 
# File 'lib/engineyard-serverside/deploy.rb', line 93

def bundle
  install_dependencies
end

#cached_deploy ⇒ Object 



21
22
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
 
# File 'lib/engineyard-serverside/deploy.rb', line 21

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
    symlink_configs
    setup_sqlite3_if_necessary
    run_with_callbacks(:compile_assets) # defined in RailsAssetSupport
    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 



398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
 
# File 'lib/engineyard-serverside/deploy.rb', line 398

def callback(what)
  @callbacks_reached ||= true

  if paths.deploy_hook(what).exist?
    shell.status "Running deploy hook: deploy/#{what}.rb"
    run Escape.shell_command(base_callback_command_for(what)) do |server, cmd|
      per_instance_args = []
      per_instance_args << '--current-roles' << server.roles.to_a.join(' ')
      per_instance_args << '--current-name'  << server.name.to_s if server.name
      per_instance_args << '--config'        << config.to_json
      cmd << " " << Escape.shell_command(per_instance_args)
    end
  elsif paths.executable_deploy_hook(what).executable?
    shell.status "Running deploy hook: deploy/#{what}"
    run [About.hook_executor, what.to_s].join(' ') do |server, cmd|
      cmd = hook_env_vars(server).reject{|k,v| v.nil?}.map{|k,v|
        "#{k}=#{Escape.shell_command([v])}"
      }.join(' ') + ' ' + config.framework_envs + ' ' + cmd
    end
  elsif paths.executable_deploy_hook(what).exist?
    shell.warning "Skipping possible deploy hook deploy/#{what} because it is not executable."
  end
end

#check_dependencies ⇒ Object 



85
86
87
 
# File 'lib/engineyard-serverside/deploy.rb', line 85

def check_dependencies
  dependency_manager.check
end

#check_repository ⇒ Object 



81
82
83
 
# File 'lib/engineyard-serverside/deploy.rb', line 81

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.



203
204
205
206
207
208
209
 
# File 'lib/engineyard-serverside/deploy.rb', line 203

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



189
190
191
192
193
194
195
196
197
 
# File 'lib/engineyard-serverside/deploy.rb', line 189

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

#copy_repository_cache ⇒ Object

task



274
275
276
277
278
279
 
# File 'lib/engineyard-serverside/deploy.rb', line 274

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 



281
282
283
 
# File 'lib/engineyard-serverside/deploy.rb', line 281

def create_revision_file
  run create_revision_file_command
end

#create_revision_file_command ⇒ Object 



69
70
71
 
# File 'lib/engineyard-serverside/deploy.rb', line 69

def create_revision_file_command
  source.create_revision_file_command(paths.active_revision)
end

#deploy ⇒ Object

default task



15
16
17
18
19
 
# File 'lib/engineyard-serverside/deploy.rb', line 15

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

#disable_maintenance_page ⇒ Object 



113
114
115
 
# File 'lib/engineyard-serverside/deploy.rb', line 113

def disable_maintenance_page
  maintenance.conditionally_disable
end

#enable_maintenance_page ⇒ Object 



109
110
111
 
# File 'lib/engineyard-serverside/deploy.rb', line 109

def enable_maintenance_page
  maintenance.conditionally_enable
end

#ensure_git_ssh_wrapper ⇒ Object 



153
154
155
 
# File 'lib/engineyard-serverside/deploy.rb', line 153

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

#ensure_ownership(*targets) ⇒ Object 



383
384
385
 
# File 'lib/engineyard-serverside/deploy.rb', line 383

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 



65
66
67
 
# File 'lib/engineyard-serverside/deploy.rb', line 65

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.)



172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/engineyard-serverside/deploy.rb', line 172

def generate_ssh_wrapper
  path = paths.ssh_wrapper
  <<-SCRIPT
mkdir -p #{path.dirname}
[ -x #{path} ] || cat > #{path} <<'SSH'
#!/bin/sh
unset SSH_AUTH_SOCK

# Filter command mangling by git when using `GIT_SSH` and the string `plink`
command=$(echo "$*" | sed -e "s/^-batch //")
ssh -o CheckHostIP=no -o StrictHostKeyChecking=no -o PasswordAuthentication=no -o LogLevel=INFO -o IdentityFile=#{paths.deploy_key} -o IdentitiesOnly=yes ${command}
SSH
chmod 0700 #{path}
  SCRIPT
end

#install_dependencies ⇒ Object 



97
98
99
 
# File 'lib/engineyard-serverside/deploy.rb', line 97

def install_dependencies
  dependency_manager.install
end

#migrate ⇒ Object

task



254
255
256
257
258
259
260
261
262
 
# File 'lib/engineyard-serverside/deploy.rb', line 254

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



391
392
393
394
395
396
 
# File 'lib/engineyard-serverside/deploy.rb', line 391

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 



264
265
266
267
268
269
270
271
 
# File 'lib/engineyard-serverside/deploy.rb', line 264

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



124
125
126
127
128
129
 
# File 'lib/engineyard-serverside/deploy.rb', line 124

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) 


89
90
91
 
# File 'lib/engineyard-serverside/deploy.rb', line 89

def rails_application?
  dependency_manager.rails_version
end

#restart ⇒ Object

task



132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
 
# File 'lib/engineyard-serverside/deploy.rb', line 132

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 



149
150
151
 
# File 'lib/engineyard-serverside/deploy.rb', line 149

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

#restart_with_maintenance_page ⇒ Object 



101
102
103
104
105
106
107
 
# File 'lib/engineyard-serverside/deploy.rb', line 101

def restart_with_maintenance_page
  load_ey_yml
  require_custom_tasks
  enable_maintenance_page
  restart
  disable_maintenance_page
end

#rollback ⇒ Object

task



226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
 
# File 'lib/engineyard-serverside/deploy.rb', line 226

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 



117
118
119
120
121
 
# File 'lib/engineyard-serverside/deploy.rb', line 117

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

#setup_services ⇒ Object 



285
286
287
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
 
# File 'lib/engineyard-serverside/deploy.rb', line 285

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 <<-WARNING
External services configuration not updated. Using previous version.
Deploy again if your services configuration appears incomplete or out of date.
#{e}
      WARNING
    end
  end

  if services = config.configured_services
    shell.status "Services configured: #{services.join(', ')}"
    dependency_manager.show_ey_config_instructions
  end
end

#setup_sqlite3_if_necessary ⇒ Object 



314
315
316
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
 
# File 'lib/engineyard-serverside/deploy.rb', line 314

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 <<-WRAP
cat > #{paths.shared_config}/database.sqlite3.yml<<'YML'
#{config.framework_env}:
  adapter: sqlite3
  database: #{paths.shared}/databases/#{config.framework_env}.sqlite3
  pool: 5
  timeout: 5000
YML
    WRAP

    shell.substatus "Symlink database.yml"
    run "ln -nfs #{paths.shared_config}/database.sqlite3.yml #{paths.active_release_config}/database.yml"
  end
end

#short_log_message(revision) ⇒ Object 



73
74
75
 
# File 'lib/engineyard-serverside/deploy.rb', line 73

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

#source ⇒ Object 



422
423
424
425
 
# File 'lib/engineyard-serverside/deploy.rb', line 422

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

#ssh_executable ⇒ Object

create ssh wrapper on all servers



158
159
160
161
162
163
164
165
 
# File 'lib/engineyard-serverside/deploy.rb', line 158

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



371
372
373
374
375
376
377
378
379
380
381
 
# File 'lib/engineyard-serverside/deploy.rb', line 371

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 



344
345
346
347
348
349
350
 
# File 'lib/engineyard-serverside/deploy.rb', line 344

def symlink_configs
  shell.status "Preparing shared resources for release."
  symlink_tasks.each do |what, cmd|
    shell.substatus what
    run(cmd)
  end
end

#symlink_tasks ⇒ Object 



352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
 
# File 'lib/engineyard-serverside/deploy.rb', line 352

def symlink_tasks
  [
    ["Set group write permissions",           "chmod -R g+w #{paths.active_release}"],
    ["Remove public/system if symlinked",     "if [ -L \"#{paths.public_system}\" ]; then rm -rf #{paths.public_system}; fi"],
    ["Remove symlinked shared directories",   "rm -rf #{paths.active_log} #{paths.active_release}/tmp/pids"],
    ["Create tmp directory",                  "mkdir -p #{paths.active_release}/tmp"],
    ["Create public directory",               "mkdir -p #{paths.public}"],
    ["Create config directory",               "mkdir -p #{paths.active_release_config}"],
    ["Symlink shared log directory",          "ln -nfs #{paths.shared_log} #{paths.active_log}"],
    ["Symlink public system directory",       "if [ ! -e \"#{paths.public_system}\" ]; then ln -ns #{paths.shared_system} #{paths.public_system}; fi"],
    ["Symlink shared pids directory",         "ln -nfs #{paths.shared}/pids #{paths.active_release}/tmp/pids"],
    ["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) 


77
78
79
 
# File 'lib/engineyard-serverside/deploy.rb', line 77

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

#update_repository_cache ⇒ Object 



61
62
63
 
# File 'lib/engineyard-serverside/deploy.rb', line 61

def update_repository_cache
  source.update_repository_cache
end