Class: Fly::Actions

Inherits:
Thor::Group
  • Object
show all
Includes:
Scanner, Thor::Actions, Thor::Base, Thor::Shell
Defined in:
lib/fly.io-rails/actions.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Scanner

#scan_rails_app

Constructor Details

#initialize(app = nil, options = {}) ⇒ Actions

Returns a new instance of Actions.



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# File 'lib/fly.io-rails/actions.rb', line 19

def initialize(app=nil, options={})
  # placate thor
  @options = {}
  @destination_stack = [Dir.pwd]

  # extract options
  app ? self.app = app : app = self.app
  regions = options[:region]&.flatten || []
  @avahi = options[:avahi]
  @litefs = options[:litefs]
  @nats = options[:nats]
  @nomad = options[:nomad]
  @passenger = options[:passenger]
  @serverless = options[:serverless]
  @eject = options[:eject]

  # prepare template variables
  @ruby_version = RUBY_VERSION
  @bundler_version = Bundler::VERSION
  @node = File.exist? 'node_modules'
  @yarn = File.exist? 'yarn.lock'
  @node_version = @node ? `node --version`.chomp.sub(/^v/, '') : '16.17.0'
  @yarn_version = @yarn ? `yarn --version`.chomp : 'latest'
  @org = Fly::Machines.org

  @set_stage = @nomad ? 'set' : 'set --stage'

  # determine region
  if !regions or regions.empty?
    @regions = JSON.parse(`flyctl regions list --json --app #{app}`)['Regions'].
      map {|region| region['Code']} rescue []
  else
    @regions = regions
  end

  @region = @regions.first || 'iad'
  @regions = [@region] if @regions.empty?

  # Process DSL
  @config = Fly::DSL::Config.new
  if File.exist? 'config/fly.rb'
    @config.instance_eval IO.read('config/fly.rb')
    @image = @config.image
  end

  # set additional variables based on application source
  scan_rails_app
  @redis = :internal if options[:redis]
  if File.exist? 'Procfile.fly'
    @redis = :internal if IO.read('Procfile.fly') =~ /^redis/
  end

  if options[:anycable] and not @anycable
    # read and remove original config
    original_config = YAML.load_file 'config/cable.yml'
    File.unlink 'config/cable.yml'

    # add and configure anycable-rails
    say_status :run, 'bundle add anycable-rails'
    Bundler.with_original_env do
      system 'bundle add anycable-rails'
      system 'bin/rails generate anycable:setup --skip-heroku --skip-procfile-dev --skip-jwt --devenv=skip'
    end

    # insert action_cable_meta_tag
    insert_into_file 'app/views/layouts/application.html.erb',
      "    <%= action_cable_meta_tag %>\n",
      after: "<%= csp_meta_tag %>\n"

    # copy production environment to original config
    anycable_config = YAML.load_file 'config/cable.yml'
    original_config['production'] = anycable_config['production']
    File.write 'config/cable.yml', YAML.dump(original_config)

    @anycable = true
  end

  @nginx = @passenger || (@anycable and not @deploy)

  # determine processes
  @procs = {web: 'bin/rails server'}
  @procs[:web] = "nginx -g 'daemon off;'" if @nginx
  @procs[:rails] = "bin/rails server -p 8081" if @nginx and not @passenger
  @procs[:worker] = 'bundle exec sidekiq' if @sidekiq
  @procs[:redis] = 'redis-server /etc/redis/redis.conf' if @redis == :internal
  @procs.merge! 'anycable-rpc': 'bundle exec anycable --rpc-host=0.0.0.0:50051',
    'anycable-go': 'env /usr/local/bin/anycable-go --port=8082 --host 0.0.0.0  --rpc_host=localhost:50051' if @anycable
end

Instance Attribute Details

#dockerfile ⇒ Object

Returns the value of attribute dockerfile.



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# File 'lib/fly.io-rails/actions.rb', line 17

def dockerfile
  @dockerfile
end

#ignorefile ⇒ Object

Returns the value of attribute ignorefile.



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# File 'lib/fly.io-rails/actions.rb', line 17

def ignorefile
  @ignorefile
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/fly.io-rails/actions.rb', line 17

def options
  @options
end

Instance Method Details

#app ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 108

def app
  return @app if @app
  self.app = TOML.load_file('fly.toml')['app']
end

#app=(app) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 123

def app=(app)
  @app = app
  @appName = @app.gsub('-', '_').camelcase(:lower)
end

#app_template(template_file, destination) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 118

def app_template template_file, destination
  app
  template template_file, destination
end

#bundle_gems ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 306

def bundle_gems
  if @anycable and not @gemfile.include? 'anycable-rails'
    cmd = 'bundle add anycable-rails'
    say_status :run, cmd
    Bundler.with_original_env { system cmd }
    exit $?.exitstatus unless $?.success?
  end

  if @postgresql and not @gemfile.include? 'pg'
    cmd = 'bundle add pg'
    say_status :run, cmd
    Bundler.with_original_env { system cmd }
    exit $?.exitstatus unless $?.success?
  end

  if @redis and not @gemfile.include? 'redis'
    cmd = 'bundle add redis'
    say_status :run, cmd
    Bundler.with_original_env { system cmd }
    exit $?.exitstatus unless $?.success?
  end
end

#create_postgres(app, org, region, vm_size, volume_size, cluster_size) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 281

def create_postgres(app, org, region, vm_size, volume_size, cluster_size)
   cmd = "flyctl postgres create --name #{app}-db --org #{org} --region #{region} --vm-size #{vm_size} --volume-size #{volume_size} --initial-cluster-size #{cluster_size}"
   cmd += ' --machines' unless @nomad
   say_status :run, cmd
   output = FlyIoRails::Utils.tee(cmd)
   output[%r{postgres://\S+}]
end

#create_redis(app, org, region, eviction) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 289

def create_redis(app, org, region, eviction)
  # see if redis is already defined
  name = `flyctl redis list`.lines[1..-2].map(&:split).
    find {|tokens| tokens[1] == org}&.first

  if name
    secret = `flyctl redis status #{name}`[%r{redis://\S+}]
    return secret if secret
  end

  # create a new redis
  cmd = "flyctl redis create --org #{org} --name #{app}-redis --region #{region} --no-replicas #{eviction} --plan #{@config.redis.plan}"
  say_status :run, cmd
  output = FlyIoRails::Utils.tee(cmd)
  output[%r{redis://[-\w:@.]+}]
end

#create_volume(app, region, size) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 265

def create_volume(app, region, size)
  name = "#{app.gsub('-', '_')}_volume"
  volumes = JSON.parse(`flyctl volumes list --json`)

  volume = volumes.find {|volume| volume['Name'] == name and volume['Region'] == region}
  unless volume
    cmd = "flyctl volumes create #{name} --app #{app} --region #{region} --size #{size}"
    say_status :run, cmd
    system cmd
    volumes = JSON.parse(`flyctl volumes list --json`)
    volume = volumes.find {|volume| volume['Name'] == name and volume['Region'] == region}
  end

  volume && volume['id']
end

#deploy(app, image) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 438

def deploy(app, image)
  launch(app)

  # default config
  config = {
    image: image,
    guest: {
      cpus: @config.machine.cpus,
      cpu_kind: @config.machine.cpu_kind,
      memory_mb: @config.machine.memory_mb
    },
    services: [
      {
        ports: [
          {port: 443, handlers: ["tls", "http"]},
          {port: 80, handlers: ["http"]}
        ],
        protocol: "tcp",
        internal_port: 8080
      } 
    ]
  }

  # start proxy, if necessary
  Fly::Machines::fly_api_hostname!

  # only run release step if there is a non-empty release task in fly.rake
  if release_task_defined?
    # build config for release machine, overriding server command
    release_config = config.dup
    release_config.delete :services
    release_config.delete :mounts
    release_config[:processes] = [{
      name: 'release',
      entrypoint: [],
      cmd: ['bin/rails', 'fly:release'],
      env: {},
      user: 'root'
    }]

    # perform release
    say_status :fly, 'bin/rails fly:release'
    event, exit_code, machine = release(app, region: @region, config: release_config)

    if exit_code != 0
      STDERR.puts 'Error performing release'
      STDERR.puts (exit_code ? {exit_code: exit_code} : event).inspect
      STDERR.puts "run 'flyctl logs --instance #{machine}' for more information"
      exit 1
    end
  end

  # stop previous instances - list will fail on first run
  stdout, stderr, status = Open3.capture3('fly machines list --json')
  existing_machines = []
  unless stdout.empty?
    JSON.parse(stdout).each do |list|
      existing_machines << list['name']
      next if list['id'] == machine or list['state'] == 'destroyed'
      cmd = "fly machines remove --force #{list['id']}"
      say_status :run, cmd
      system cmd
    end
  end

  # configure sqlite3 (can be overridden by fly.toml)
  if @sqlite3
    config[:mounts] = [
      { volume: @volume, path: '/mnt/volume' }
    ]

    config[:env] = {
      "DATABASE_URL" => "sqlite3:///mnt/volume/production.sqlite3"
    }

    if @litefs
      config[:env]['DATABASE_URL'] = "sqlite3:///data/production.sqlite3"
    end
  end

  # process toml overrides
  toml = (TOML.load_file('fly.toml') rescue {})
  config[:env] = toml['env'] if toml['env']
  config[:services] = toml['services'] if toml['services']
  if toml['mounts']
    mounts = toml['mounts']
    volume = JSON.parse(`flyctl volumes list --json`).
      find {|volume| volume['Name'] == mounts['source'] and volume['Region'] == @region}
    if volume
      config[:mounts] = [ { volume: volume['id'], path: mounts['destination'] } ]
    else
      STDERR.puts "volume #{mounts['source']} not found in region #{@region}"
      exit 1
    end
  end

  # start app
  machines = {}
  options = {region: @region, config: config}
  say_status :fly, "start #{app}"
  if not toml['processes'] or toml['processes'].empty?
    options[:name] = "#{app}-machine"
    taken = existing_machines.find {|name| name.start_with? options[:name]}
    options[:name] = taken == options[:name] ? "#{taken}-2" : taken.next if taken

    start = Fly::Machines.create_and_start_machine(app, options)
    machines['app'] = start[:id] 
  else
    config[:env] ||= {}
    config[:env]['NATS_SERVER'] = 'localhost'
    toml['processes'].each do |name, entrypoint|
      options[:name] = "#{app}-machine-#{name}"
      taken = existing_machines.find {|name| name.start_with? options[:name]}
      options[:name] = taken == options[:name] ? "#{taken}-2" : taken.next if taken

      config[:env]['SERVER_COMMAND'] = entrypoint
      start = Fly::Machines.create_and_start_machine(app, options)

      if start['error']
        STDERR.puts "ERROR: #{start['error']}"
        exit 1
      end

      machines[name] = start[:id] 

      config.delete :mounts
      config.delete :services

      if config[:env]['NATS_SERVER'] = 'localhost'
        config[:env]['NATS_SERVER'] = start[:private_ip] 
      end
    end
  end

  if machines.empty?
    STDERR.puts 'Error starting application'
    PP.pp start, STDERR
    exit 1
  end

  timeout = Time.now + 300
  while Time.now < timeout and not machines.empty?
    machines.each do |name, machine|
      status = Fly::Machines.wait_for_machine app, machine,
       timeout: 10, status: 'started'
      machines.delete name if status[:ok]
    end
  end

  unless machines.empty?
    STDERR.puts 'Timeout waiting for application to start'
  end
end

#generate_dockerfile ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 169

def generate_dockerfile
  if @eject or File.exist? 'Dockerfile'
    @dockerfile = 'Dockerfile'
  else
    tmpfile = Tempfile.new('Dockerfile')
    @dockerfile = tmpfile.path
    tmpfile.unlink
    at_exit { File.unlink @dockerfile }
  end

  if @eject or not File.exist? @dockerfile
    select_image
    app_template 'Dockerfile.erb', @dockerfile
  end
end

#generate_dockerignore ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 185

def generate_dockerignore
  if @eject or File.exist? '.dockerignore'
    @ignorefile = '.dockerignore'
  elsif File.exist? '.gitignore'
    @ignorefile = '.gitignore'
  else
    tmpfile = Tempfile.new('Dockerignore')
    @ignoreile = tmpfile.path
    tmpfile.unlink
    at_exit { Filee.unlink @ignorefile }
  end

  if @eject or not File.exist? @ignorefile
    app_template 'dockerignore.erb', @ignorefile
  end
end

#generate_fly_config ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 134

def generate_fly_config
  select_image
  app_template 'fly.rb.erb', 'config/fly.rb'
end

#generate_ipv4 ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 253

def generate_ipv4
  cmd = 'flyctl ips allocate-v4'
  say_status :run, cmd
  system cmd
end

#generate_ipv6 ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 259

def generate_ipv6
  cmd = 'flyctl ips allocate-v6'
  say_status :run, cmd
  system cmd
end

#generate_key ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 229

def generate_key
  credentials = nil
  if File.exist? 'config/credentials/production.key'
    credentials = 'config/credentials/production.key'
  elsif File.exist? 'config/master.key'
    credentials = 'config/master.key'
  end
  
  if credentials
    say_status :run, "flyctl secrets #{@set_stage} RAILS_MASTER_KEY from #{credentials}"
    system "flyctl secrets #{@set_stage} RAILS_MASTER_KEY=#{IO.read(credentials).chomp}"
    puts
  end
end

#generate_litefs ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 225

def generate_litefs
  app_template 'litefs.yml.erb', 'config/litefs.yml'
end

#generate_nginx_conf ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 202

def generate_nginx_conf
  return unless @passenger
  app_template 'nginx.conf.erb', 'config/nginx.conf'

  if @serverless
    app_template 'hook_detached_process.erb', 'config/hook_detached_process'
    FileUtils.chmod 'u+x', 'config/hook_detached_process'
  end
end

#generate_patches ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 244

def generate_patches
  if false # @redis_cable and not @anycable and @redis != :internal and
    not File.exist? 'config/initializers/action_cable.rb'

    app
    template 'patches/action_cable.rb', 'config/initializers/action_cable.rb'
  end
end

#generate_procfile ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 220

def generate_procfile
  return unless @procs.length > 1
  app_template 'Procfile.fly.erb', 'Procfile.fly'
end

#generate_raketask ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 216

def generate_raketask
  app_template 'fly.rake.erb', 'lib/tasks/fly.rake'
end

#generate_terraform ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 212

def generate_terraform
  app_template 'main.tf.erb', 'main.tf'
end

#generate_toml ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 130

def generate_toml
  app_template 'fly.toml.erb', 'fly.toml'
end

#launch(app) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 367

def launch(app)
  secrets = JSON.parse(`flyctl secrets list --json`).
    map {|secret| secret["Name"]}

  unless secrets.include? 'RAILS_MASTER_KEY'
    generate_key
  end

  if @sqlite3
    if @litefs
      @regions.each do |region|
        @volume = create_volume(app, region, @config.sqlite3.size) 
      end
    else
      @volume = create_volume(app, @region, @config.sqlite3.size) 
    end
  elsif @postgresql and not secrets.include? 'DATABASE_URL'
    unless (IO.read('config/fly.rb').include?('postgres') rescue true)
      source_paths.each do |path|
        template = File.join(path, 'fly.rb.erb')
        next unless File.exist? template
        insert = IO.read(template)[/<% if @postgresql -%>\n(.*?)<% end/m, 1]
        append_to_file 'config/fly.rb', insert if insert
        break
      end
    end

    secret = create_postgres(app, @org, @region,
      @config.postgres.vm_size,
      @config.postgres.volume_size,
      @config.postgres.initial_cluster_size)

    if secret
      cmd = "flyctl secrets #{@set_stage} DATABASE_URL=#{secret}"
      say_status :run, cmd
      system cmd
    end
  end

  if @redis and @redis != :internal and not secrets.include? 'REDIS_URL'
    # Set eviction policy to true if a cache provider, else false.
    eviction = @redis_cache ? '--enable-eviction' : '--disable-eviction'

    secret = create_redis(app, @org, @region, eviction)

    if secret
      cmd = "flyctl secrets #{@set_stage} REDIS_URL=#{secret}"
      say_status :run, cmd
      system cmd
    end
  end
end

#release(app, options) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 329

def release(app, options)
  start = Fly::Machines.create_and_start_machine(app, options)
  machine = start[:id]

  if not machine
    STDERR.puts 'Error starting release machine'
    PP.pp start, STDERR
    exit 1
  end

  status = Fly::Machines.wait_for_machine app, machine,
    timeout: 60, state: 'started'

  # wait for release to copmlete
  5.times do
    status = Fly::Machines.wait_for_machine app, machine,
      instance_id: start[:instance_id], timeout: 60, state: 'stopped'
    break if status[:ok]
  end

  if status and status[:ok]
    event = nil
    300.times do
      status = Fly::Machines.get_a_machine app, start[:id]
      event = status[:events]&.first
      break if event[:type] == 'exit'
      sleep 0.2
    end

    exit_code = event&.dig(:request, :MonitorEvent, :exit_event, :exit_code)
    Fly::Machines.delete_machine app, machine if machine
    exit_code ||= 0 if event&.dig(:request, :MonitorEvent, :exit_event, :signal) == -1
    return event, exit_code, machine
  else
    return status, nil, nil
  end
end

#release_task_defined? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fly.io-rails/actions.rb', line 420

def release_task_defined?
  if File.exist? 'lib/tasks/fly.rake'
    Rake.load_rakefile 'lib/tasks/fly.rake'
  else
    Tempfile.create ['fly', '.rake'] do |file|
      IO.write file.path, render('fly.rake.erb')
      Rake.load_rakefile file.path
    end
  end

  if Rake::Task.task_defined? 'fly:release'
    task = Rake::Task['fly:release']
    not (task.actions.empty? and task.prereqs.empty?)
  else
    false
  end
end

#render(template) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 113

def render template
  template = ERB.new(IO.read(File.expand_path(template, source_paths.last)), trim_mode: '-')
  template.result(binding).chomp
end

#select_image ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 139

def select_image
  return @image if @image and @image.include? ":#{@ruby_version}-"

  tags = []

  debian_releases = %w(stretch buster bullseye bookworm) 
          
  Net::HTTP.start('quay.io', 443, use_ssl: true) do |http|
    (1..).each do |page|
      request = Net::HTTP::Get.new "/api/v1/repository/evl.ms/fullstaq-ruby/tag/?page=#{page}&limit=100"
      response = http.request request
      body = JSON.parse(response.body)
      tags += body['tags'].map {|tag| tag['name']}.grep /jemalloc-\w+-slim/
      break unless body['has_additional']
    end
  end 
      
  ruby_releases = tags.group_by {|tag| tag.split('-').first}.
    map do |release, tags|
      [release, tags.max_by {|tag| debian_releases.find_index(tag[/jemalloc-(\w+)-slim/, 1]) || -1}]
    end.sort.to_h

  unless ruby_releases[@ruby_version]
    @ruby_version = ruby_releases.keys.find {|release| release >= @ruby_version} ||
      ruby_releases.keys.last
  end

  @image = 'quay.io/evl.ms/fullstaq-ruby:' + ruby_releases[@ruby_version]
end

#terraform(app, image) ⇒ Object 



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# File 'lib/fly.io-rails/actions.rb', line 592

def terraform(app, image) 
  # find first machine using the image ref in terraform config file
  machine = Fly::HCL.parse(IO.read('main.tf')).
    map {|block| block.dig(:resource, 'fly_machine')}.compact.
    find {|machine| machine.values.first[:image] == 'var.image_ref'}
  if not machine
    STDERR.puts 'unable to find fly_machine with image = var.image_ref in main.rf'
    exit 1
  end

  # extract HCL configuration for the machine
  config = machine.values.first

  # delete HCL specific configuration items
  %i(services for_each region app name depends_on).each do |key|
     config.delete key
  end

  # move machine configuration into guest object
  config[:guest] = {
    cpus: config.delete(:cpus),
    memory_mb: config.delete(:memorymb),
    cpu_kind: config.delete(:cputype)
  }

  # release machines should have no services or mounts
  config.delete :services
  config.delete :mounts

  # override start command
  config[:env] ||= {}
  config[:env]['SERVER_COMMAND'] = 'bin/rails fly:release'

  # fill in image
  config[:image] = image

  # start proxy, if necessary
  endpoint = Fly::Machines::fly_api_hostname!

  # perform release, if necessary
  if release_task_defined?
    say_status :fly, config[:env]['SERVER_COMMAND']
    event, exit_code, machine = release(app, region: @region, config: config)
  else
    exit_code = 0
  end

  if exit_code == 0
    # use terraform apply to deploy
    ENV['FLY_API_TOKEN'] = `flyctl auth token`.chomp
    ENV['FLY_HTTP_ENDPOINT'] = endpoint if endpoint
    system "terraform apply -auto-approve -var=\"image_ref=#{image}\""
  else
    STDERR.puts 'Error performing release'
    STDERR.puts (exit_code ? {exit_code: exit_code} : event).inspect
    STDERR.puts "run 'flyctl logs --instance #{machine}' for more information"
    exit 1
  end
end