tools: Build arm32 build images on aarch64 (#4132)

* tools: Build arm32 build images on aarch64

* Override ansible_architecture variable with armv7l

Author: Haroon-Khel

Jenkinsfile

@@ -37,10 +37,10 @@ pipeline {
                 }
                 stage('Ubuntu16.04 armv7l') {
                     agent {
-                        label "docker&&linux&&armv7l"
+                        label "docker&&linux&&aarch64"
                     }
                     steps {
-                        dockerBuild('armv7l', 'ubuntu1604', 'Dockerfile.Ubuntu1604')
+                        dockerBuildArm32('armv7l', 'ubuntu1604', 'Dockerfile.Ubuntu1604')
                     }
                 }
                 stage('Ubuntu20.04 riscv64') {
@@ -81,7 +81,22 @@ pipeline {
             }
         }
     } 
-} 
+}
+
+def dockerBuildArm32(architecture, distro, dockerfile) {
+    git poll: false, url: 'https://github.com/adoptium/infrastructure.git'
+    def git_sha = "${env.GIT_COMMIT.trim()}"
+    def ansible_arch = "armv7l"
+    docker.withRegistry('https://index.docker.io/v1/', 'dockerhub') {
+        sh """
+            docker buildx build --platform linux/arm/v7 \
+            --build-arg git_sha=$git_sha --build-arg ansible_arch=$ansible_arch \
+            -f ansible/docker/$dockerfile \
+            -t adoptopenjdk/${distro}_build_image:linux-$architecture \ 
+            --push .
+        """
+    }
+}
 
 def dockerBuild(architecture, distro, dockerfile) {
     git poll: false, url: 'https://github.com/adoptium/infrastructure.git'

ansible/docker/Dockerfile.Ubuntu1604

@@ -1,6 +1,7 @@
 FROM ubuntu:16.04
 
 ARG git_sha
+ARG ansible_arch
 ARG user=jenkins
 
 RUN apt-get update
@@ -22,7 +23,7 @@ RUN echo "localhost ansible_connection=local" > /ansible/hosts
 
 RUN set -eux; \
  cd /ansible; \
- ansible-playbook -i hosts ansible/playbooks/AdoptOpenJDK_Unix_Playbook/main.yml -e "git_sha=$git_sha" --skip-tags="debug,hosts_file,hostname,adoptopenjdk,jenkins,nagios,superuser,docker,swap_file,crontab,nvidia_cuda_toolkit,ntp_time"
+ ansible-playbook -i hosts ansible/playbooks/AdoptOpenJDK_Unix_Playbook/main.yml -e "git_sha=$git_sha ansible_architecture=$ansible_arch" --skip-tags="debug,hosts_file,hostname,adoptopenjdk,jenkins,nagios,superuser,docker,swap_file,crontab,nvidia_cuda_toolkit,ntp_time"
 
 RUN rm -rf /ansible