Module: Dapp::Kube::Dapp::Command::Deploy

Included in:
Dapp
Defined in:
lib/dapp/kube/dapp/command/deploy.rb

Instance Method Summary collapse

Instance Method Details

#kube_all_jobs_names ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 36

def kube_all_jobs_names
  kubernetes.job_list['items'].map { |i| i['metadata']['name'] }
end

#kube_create_helm_auto_purge_trigger_file(release_name) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 69

def kube_create_helm_auto_purge_trigger_file(release_name)
  FileUtils.mkdir_p File.dirname(kube_helm_auto_purge_trigger_file_path(release_name))
  FileUtils.touch kube_helm_auto_purge_trigger_file_path(release_name)
end

#kube_delete_helm_auto_purge_trigger_file(release_name) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 74

def kube_delete_helm_auto_purge_trigger_file(release_name)
  if File.exists? kube_helm_auto_purge_trigger_file_path(release_name)
    FileUtils.rm_rf kube_helm_auto_purge_trigger_file_path(release_name)
  end
end

#kube_delete_job!(job_name, all_pods_specs) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 40

def kube_delete_job!(job_name, all_pods_specs)
  job_spec = Kubernetes::Client::Resource::Pod.new kubernetes.job(job_name)

  job_pods_specs = all_pods_specs
    .select do |pod|
      Array(pod.metadata['ownerReferences']).any? do |owner_reference|
        owner_reference['uid'] == job_spec.metadata['uid']
      end
    end

  job_pods_specs.each do |job_pod_spec|
    kubernetes.delete_pod!(job_pod_spec.name)
  end

  # FIXME: https://kubernetes.io/docs/concepts/workloads/controllers/garbage-collection/
  # FIXME: orphanDependents deprecated, should be propagationPolicy=Orphan. But it does not work.
  # FIXME: Also, kubectl uses the same: https://github.com/kubernetes/kubernetes/blob/master/pkg/kubectl/delete.go#L388
  # FIXME: https://github.com/kubernetes/kubernetes/issues/46659
  kubernetes.delete_job!(job_name, orphanDependents: false)
  loop do
    break unless kubernetes.job?(job_name)
    sleep 1
  end
end

#kube_deploy ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 6

def kube_deploy
  helm_release do |release|
    do_deploy = proc do
      kube_run_deploy(release)
    end

    if dry_run?
      do_deploy.call
    else
      lock_helm_release &do_deploy
    end
  end
end

#kube_flush_hooks_jobs(release) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 20

def kube_flush_hooks_jobs(release)
  all_jobs_names = kube_all_jobs_names

  all_pods_specs = kubernetes.pod_list["items"]
    .map {|spec| Kubernetes::Client::Resource::Pod.new(spec)}

  release.hooks.values
    .reject { |job| ['0', 'false'].include? job.annotations["dapp/recreate"].to_s }
    .select { |job| all_jobs_names.include? job.name }
    .each do |job|
      log_process("Delete hook job `#{job.name}` (dapp/recreate)", short: true) do
        kube_delete_job!(job.name, all_pods_specs) unless dry_run?
      end
    end
end

#kube_helm_auto_purge_trigger_file_path(release_name) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 65

def kube_helm_auto_purge_trigger_file_path(release_name)
  File.join(self.class.home_dir, "helm", release_name, "auto_purge_failed_release_on_next_deploy")
end

#kube_run_deploy(release) ⇒ Object 



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# File 'lib/dapp/kube/dapp/command/deploy.rb', line 80

def kube_run_deploy(release)
  log_process("Deploy release #{release.name}") do
    helm_status_res = shellout("helm status #{release.name}")

    release_status = nil
    if helm_status_res.status.success?
      status_line = helm_status_res.stdout.lines.find {|l| l.start_with? "STATUS: "}
      release_status = status_line.partition(": ")[2].strip if status_line
    end

    release_exists = nil

    if not helm_status_res.status.success?
      # Helm release is not exists.
      release_exists = false

      # Create purge-trigger for the next run.
      kube_create_helm_auto_purge_trigger_file(release.name)
    elsif ["FAILED", "PENDING_INSTALL"].include? release_status
      release_exists = true

      if File.exists? kube_helm_auto_purge_trigger_file_path(release.name)
        log_process("Purge helm release #{release.name}") do
          shellout!("helm delete --purge #{release.name}")
        end

        # Purge-trigger file remains to exist
        release_exists = false
      end
    else
      if File.exists? kube_helm_auto_purge_trigger_file_path(release.name)
        log_warning "[WARN] Will not purge helm release #{release.name}: expected FAILED or PENDING_INSTALL release status, got #{release_status}"
      end

      release_exists = true
      kube_delete_helm_auto_purge_trigger_file(release.name)
    end

    kube_flush_hooks_jobs(release)

    watch_hooks_by_type = release.jobs.values
      .reduce({}) do |res, job|
        if job.annotations['dapp/watch-logs'].to_s == 'true'
          job.annotations['helm.sh/hook'].to_s.split(',').each do |hook_type|
            res[hook_type] ||= []
            res[hook_type] << job
          end
        end

        res
      end
      .tap do |res|
        res.values.each do |jobs|
          jobs.sort_by! {|job| job.annotations['helm.sh/hook-weight'].to_i}
        end
      end

    watch_hooks = if release_exists
      watch_hooks_by_type['pre-upgrade'].to_a + watch_hooks_by_type['post-upgrade'].to_a
    else
      watch_hooks_by_type['pre-install'].to_a + watch_hooks_by_type['post-install'].to_a
    end

    watch_hooks_thr = nil
    watch_hooks_condition_mutex = ::Mutex.new
    watch_hooks_condition = ::ConditionVariable.new
    deploy_has_began = false
    unless dry_run? and watch_hooks.any?
      watch_hooks_thr = Thread.new do
        watch_hooks_condition_mutex.synchronize do
          while not deploy_has_began do
            watch_hooks_condition.wait(watch_hooks_condition_mutex)
          end
        end

        begin
          watch_hooks.each do |job|
            Kubernetes::Manager::Job.new(self, job.name).watch_till_done!
          end # watch_hooks.each
        rescue Kubernetes::Error::Default => e
          # Default-ошибка -- это ошибка для пользователя которую перехватывает и
          # показывает bin/dapp, а затем dapp выходит с ошибкой.
          # Нельзя убивать родительский поток по Default-ошибке
          # из-за того, что в этот момент в нем вероятно работает helm,
          # а процесс деплоя в helm прерывать не стоит.
          # Поэтому перехватываем и просто отображаем произошедшую
          # ошибку для информации пользователю без завершения работы dapp.
          $stderr.puts(::Dapp::Dapp.paint_string(::Dapp::Helper::NetStatus.message(e), :warning))
          sentry_exception(e, extra: {"job-spec" => job.spec})
        end

      end # Thread
    end # unless

    deployment_managers = release.deployments.values
      .map {|deployment| Kubernetes::Manager::Deployment.new(self, deployment.name)}

    deployment_managers.each(&:before_deploy)

    log_process("#{release_exists ? "Upgrade" : "Install"} helm release #{release.name}") do
      watch_hooks_condition_mutex.synchronize do
        deploy_has_began = true
        # Фактически гарантируется лишь вывод сообщения log_process перед выводом из потока watch_thr
        watch_hooks_condition.signal
      end

      cmd_res = if release_exists
        release.upgrade_helm_release
      else
        release.install_helm_release
      end

      if cmd_res.error?
        if cmd_res.stderr.end_with? "has no deployed releases\n"
          log_warning "[WARN] Helm release #{release.name} is in improper state: #{cmd_res.stderr}"
          log_warning "[WARN] Helm release #{release.name} will be removed with `helm delete --purge` on the next run of `dapp kube deploy`"

          kube_create_helm_auto_purge_trigger_file(release.name)
        end

        raise ::Dapp::Error::Command, code: :kube_helm_failed, data: {output: (cmd_res.stdout + cmd_res.stderr).strip}
      else
        kube_delete_helm_auto_purge_trigger_file(release.name)

        watch_hooks_thr.join if !dry_run? && watch_hooks_thr && watch_hooks_thr.alive?
        log_info((cmd_res.stdout + cmd_res.stderr).strip)
      end
    end

    deployment_managers.each(&:after_deploy)

    unless dry_run?
      begin
        ::Timeout::timeout(self.options[:timeout] || 300) do
          deployment_managers.each {|deployment_manager| deployment_manager.watch_till_ready!}
        end
      rescue ::Timeout::Error
        raise ::Dapp::Error::Command, code: :kube_deploy_timeout
      end
    end
  end
end