Jenkinsfile.docker-sync

#!/usr/bin/env groovy

/*
 * Copyright (C) 2021 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

final SYNC_IMAGES = [
  'busybox:latest': [
    job: null,
    target: 'starlord.inscloudgate.net/jenkins/busybox:latest',
  ],
  'docker/dockerfile:1.0-experimental': [
    job: null,
    target: 'starlord.inscloudgate.net/jenkins/dockerfile:1.0-experimental',
  ],
  'selenium/hub:4.6': [
    job: null,
    target: 'starlord.inscloudgate.net/jenkins/selenium-hub:4.6'
  ],
  'selenium/node-chrome:107.0': [
    job: null,
    target: 'starlord.inscloudgate.net/jenkins/selenium-node-chrome:107.0'
  ]
]

pipeline {
  agent { label 'canvas-docker' }

  options {
    ansiColor('xterm')
    timestamps()
  }

  stages {
    stage('Calculate Changed Images') {
      steps {
        script {
          SYNC_IMAGES.each { srcTag, config ->
            def dstJob = config['job']
            def dstTag = config['target']

            echo "ITERATE ${srcTag} AND ${dstTag}"

            sh """
              docker pull $srcTag
              docker pull $dstTag || true
            """

            def srcImageId = sh(script: "docker images --filter=reference=$srcTag --format '{{.ID}}'", returnStdout: true).trim() ?: 'unknown'
            def dstImageId = sh(script: "docker images --filter=reference=$dstTag --format '{{.ID}}'", returnStdout: true).trim() ?: 'unknown'

            if (srcImageId == dstImageId) {
              slackSend(
                channel: '#devx-alerts',
                color: 'good',
                message: "syncing image ${srcTag} (${srcImageId}) to ${dstTag} (${dstImageId}), no changes found"
              )
            } else {
              sh """
                docker tag $srcTag $dstTag
                docker push $dstTag
              """

              if (dstJob) {
                build(job: dstJob, parameters: [
                  string(name: 'GERRIT_REFSPEC', value: "${env.GERRIT_REFSPEC}"),
                ], propagate: false, wait: false)
              }

              slackSend(
                channel: '#devx-alerts',
                color: 'warning',
                message: "syncing image ${srcTag} (${srcImageId}) to ${dstTag} (${dstImageId}), changes found"
              )
            }

            echo "SRC ID $srcImageId"
            echo "DST ID $dstImageId"
          }
        }
      }
    }
  }
}