merge: docker-image: add support for x86

See merge request !3

docker-image.yml

@@ -10,6 +10,11 @@ stages:
   script:
     - docker build -t $CI_PROJECT_NAME:latest-$ARCH .
 
+.build_with_arch:
+  stage: build
+  script:
+    - docker build --build-arg ARCH=$DOCKER_ARCH/ -t $CI_PROJECT_NAME:latest-$ARCH .
+
 build-s390x:
   extends: .build
   variables:
@@ -26,6 +31,18 @@ build-x86_64:
     - docker-alpine
     - x86_64
 
+build-x86:
+  extends: .build_with_arch
+  image:
+    name: alpinelinux/docker-cli:latest-x86
+    entrypoint: ["linux32", "sh", "-c"]
+  variables:
+    ARCH: x86
+    DOCKER_ARCH: i386
+  tags:
+    - docker-alpine
+    - x86
+
 .upload:
   stage: upload
   only:
@@ -59,6 +76,16 @@ upload-x86_64:
     - docker-alpine
     - x86_64
 
+upload-x86:
+  extends: .build
+  image: alpinelinux/docker-cli:latest-x86
+  extends: .upload
+  variables:
+    ARCH: x86
+  tags:
+    - docker-alpine
+    - x86
+
 create-manifest:
   stage: manifest
   variables:
@@ -76,10 +103,12 @@ create-manifest:
       $DOCKER_NAMESPACE/$CI_PROJECT_NAME:latest-
       s390x
       x86_64
+      x86
     - >
       if [ -n "$CI_COMMIT_TAG" ]; then
       docker-push-manifest $DOCKER_NAMESPACE/$CI_PROJECT_NAME:$CI_COMMIT_TAG
       $DOCKER_NAMESPACE/$CI_PROJECT_NAME:$CI_COMMIT_TAG-
       s390x
       x86_64;
+      x86
       fi