Class: Cronicle::Driver

Inherits:
Object
  • Object
show all
Defined in:
lib/cronicle/driver.rb

Constant Summary collapse

CRON_DIRS = 
%w(/var/spool/cron/crontabs /var/spool/cron)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(hosts, options = nil) ⇒ Driver

Returns a new instance of Driver.



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# File 'lib/cronicle/driver.rb', line 6

def initialize(hosts, options = nil)
  @hosts = hosts
  @options = options
end

Instance Attribute Details

#hosts ⇒ Object (readonly)

Returns the value of attribute hosts.



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# File 'lib/cronicle/driver.rb', line 4

def hosts
  @hosts
end

Instance Method Details

#create_job(user, name, job) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 85

def create_job(user, name, job)
  execute do
    if job[:bundle]
      mkgemfile(user, name, job[:bundle])
      bundle(user, name)
    end
  end

  create_or_update_job(user, name, job)
end

#create_or_update_job(user, name, job, script = nil) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 112

def create_or_update_job(user, name, job, script = nil)
  execute do
    log_opts = {:host => host.hostname, :user => user, :job => name}
    log_opts[:color] = script ? :green : :cyan
    log_msg = (script ? 'Update' : 'Create') + " job: schedule=#{job[:schedule].inspect}"

    if host.options[:verbose]
      content_orig = script ? script[:content] : ''
      log_msg << "\n" << Cronicle::Utils.diff(content_orig, job[:content])
    end

    log_for_cronicle(:info, log_msg, log_opts)

    unless host.options[:dry_run]
      mktemp(user) do |temp_dir, user_temp_dir|
        libexec_script = script_path(user, name)

        upload_script(temp_dir, name, job[:content]) do |temp_script|
          temp_entry = temp_script + '.entry'
          sudo(:execute, :mkdir, '-p', user_libexec_dir(user))
          sudo(:execute, :cp, temp_script, libexec_script)
          sudo(:execute, :touch, user_crontab(user))
          delete_cron_entry(user, name)
          add_cron_entry(user, name, job[:schedule], user_temp_dir, job[:bundle])
        end
      end
    end
  end
end

#delete_job(scripts_by_user, target_name = nil) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 142

def delete_job(scripts_by_user, target_name = nil)
  execute do
    scripts_by_user.each do |user, scripts|
      scripts.each do |name, script|
        next if target_name && target_name != name

        log_opts = {:color => :red, :host => host.hostname, :user => user, :job => name}
        log_msg = "Delete job: schedule=#{script[:schedule].inspect}"
        log_msg << "\n" << Cronicle::Utils.diff(script[:content], '') if host.options[:verbose]
        log_for_cronicle(:info, log_msg, log_opts)

        unless host.options[:dry_run]
          delete_cron_entry(user, name)
          sudo(:execute, :rm, '-f', script[:path], :raise_on_non_zero_exit => false)
          sudo(:execute, :rm, '-rf', gemfile_dir(user, name), :raise_on_non_zero_exit => false)
        end
      end
    end
  end
end

#execute(&block) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 11

def execute(&block)
  coordinator = SSHKit::Coordinator.new(@hosts)
  hosts = coordinator.hosts

  hosts.each do |host|
    host.instance_variable_set(:@options, @options)
  end

  runner_opts = @options[:runner_options] || {}
  runner = SSHKit::Runner::Group.new(hosts, runner_opts, &block)
  runner.group_size = @options[:concurrency]
  runner.execute
end

#execute_job(user, jobs) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 37

def execute_job(user, jobs)
  execute do
    mktemp do |temp_dir|
      jobs.each do |name, job|
        log_opts = {:color => :cyan, :host => host.hostname, :user => user, :job => name}
        log_msg = 'Execute job'

        if host.options[:dry_run]
          if host.options[:verbose]
            content = job[:content].each_line.map {|l| ' ' + l }.join
            log_msg << "\n" << content.chomp << "\n"
          end

          log_for_cronicle(:info, log_msg, log_opts)
          next
        else
          log_for_cronicle(:info, log_msg, log_opts)
        end

        upload_script(temp_dir, name, job[:content]) do |temp_script|
          host_user_job = {:host => host.hostname, :user => user, :job => name}

          sniffer = proc do |obj|
            out = obj.kind_of?(SSHKit::Command) ? obj.stdout : obj.to_s

            out.each_line do |line|
              log_for_cronicle(:info, line, host_user_job)
            end
          end

          exec_opts = {:user => user, :raise_on_non_zero_exit => false, :sniffer => sniffer}

          if job[:bundle]
            mkgemfile(user, name, job[:bundle], temp_dir)
            bundle(user, name, temp_dir)

            with_bundle(user, name, temp_dir) do
              sudo(:_execute, bundler_path, :exec, temp_script, exec_opts)
            end
          else
            sudo(:_execute, temp_script, exec_opts)
          end
        end
      end
    end
  end
end

#export_crontab ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 25

def export_crontab
  crontabs_by_host = {}
  libexec_by_host = {}

  execute do
    crontabs_by_host[host.hostname] = fetch_crontabs
    libexec_by_host[host.hostname] = fetch_libexec_scripts
  end

  [crontabs_by_host, libexec_by_host]
end

#test_sudo ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 163

def test_sudo
  ok = false

  execute do
    ok = sudo(:execute, :echo, :raise_on_non_zero_exit => false)

    unless ok
      log_for_cronicle(:error, 'incorrect sudo password', :color => :red, :host => host.hostname)
    end
  end

  ok
end

#update_job(user, name, job, script) ⇒ Object 



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# File 'lib/cronicle/driver.rb', line 96

def update_job(user, name, job, script)
  job_content = job[:content].chomp
  script_content = script[:content].chomp

  execute do
    if job[:bundle]
      mkgemfile(user, name, job[:bundle])
      bundle(user, name)
    end
  end

  if [:schedule, :content].any? {|k| job[k].chomp != script[k].chomp }
    create_or_update_job(user, name, job, script)
  end
end