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path: root/qa/qa/service/cluster_provider/gcloud.rb
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# frozen_string_literal: true

require 'active_support/inflector'

module QA
  module Service
    module ClusterProvider
      class Gcloud < Base
        def validate_dependencies
          find_executable('gcloud') || raise("You must first install `gcloud` executable to run these tests.")
        end

        def initialize(rbac:)
          super(rbac: rbac)
          @attempts = 0
          @available_regions = %w(
            asia-east1 asia-east2
            asia-northeast1 asia-south1
            asia-southeast1 australia-southeast1
            europe-west1 europe-west2 europe-west4
            northamerica-northeast1 southamerica-east1
            us-central1 us-east1 us-east4
            us-west1 us-west2
          )
        end

        def setup
          login_if_not_already_logged_in
          create_cluster
        end

        def teardown
          delete_cluster
        end

        # kas is hardcoded to staging since this test should only run in staging for now
        def install_kubernetes_agent(agent_token)
          install_helm

          shell <<~CMD.tr("\n", ' ')
            helm repo add gitlab https://charts.gitlab.io &&
            helm repo update &&
            helm upgrade --install test gitlab/gitlab-agent
              --namespace gitlab-agent
              --create-namespace
              --set image.tag=#{Runtime::Env.gitlab_agentk_version}
              --set config.token=#{agent_token}
              --set config.kasAddress=wss://kas.staging.gitlab.com
          CMD
        end

        private

        def install_helm
          shell <<~CMD.tr("\n", ' ')
            curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 &&
            chmod 700 get_helm.sh &&
            ./get_helm.sh
          CMD
        end

        def login_if_not_already_logged_in
          if Runtime::Env.has_gcloud_credentials?
            attempt_login_with_env_vars
          else
            account = `gcloud auth list --filter=status:ACTIVE --format="value(account)"`
            if account.empty?
              raise "Failed to login to gcloud. No credentials provided in environment and no credentials found locally."
            else
              QA::Runtime::Logger.debug("gcloud account found. Using: #{account} for creating K8s cluster.")
            end
          end
        end

        def attempt_login_with_env_vars
          QA::Runtime::Logger.debug("Logging in with GCLOUD_ACCOUNT_EMAIL and GCLOUD_ACCOUNT_KEY.")
          gcloud_account_key = Tempfile.new('gcloud-account-key')
          gcloud_account_key.write(Runtime::Env.gcloud_account_key)
          gcloud_account_key.close
          gcloud_account_email = Runtime::Env.gcloud_account_email
          shell("gcloud auth activate-service-account #{gcloud_account_email} --key-file #{gcloud_account_key.path}")
        ensure
          gcloud_account_key && gcloud_account_key.unlink
        end

        def auth_options
          "--enable-legacy-authorization" unless rbac
        end

        def create_cluster
          @region = get_region

          shell <<~CMD.tr("\n", ' ')
            gcloud container clusters
            create #{cluster_name}
            #{auth_options}
            --region #{@region}
            --disk-size 10GB
            --num-nodes #{Runtime::Env.gcloud_num_nodes}
            && gcloud container clusters
            get-credentials
            --region #{@region}
            #{cluster_name}
          CMD
        rescue QA::Service::Shellout::CommandError
          @attempts += 1

          retry unless @attempts > 1

          raise $!, "Tried and failed to provision the cluster #{@attempts} #{"time".pluralize(@attempts)}.", $!.backtrace
        end

        def delete_cluster
          shell <<~CMD.tr("\n", ' ')
            gcloud container clusters delete
              --region #{@region}
              #{cluster_name}
              --quiet --async
          CMD
        end

        def get_region
          Runtime::Env.gcloud_region || @available_regions.delete(@available_regions.sample)
        end
      end
    end
  end
end