feat: update test image to ol9 (#877)

* feat: update test image to ol9

* use microdnf

* use docker-ce

* setup docker-ce repo

* update hashicorp repo

* update base image

* add comment

* add comment

* update graalvm b image

* restore graalvm-b test image

.cloudbuild/docker-ce.repo

@@ -0,0 +1,6 @@
+[docker-ce-stable]
+name=Docker CE Stable - $basearch
+baseurl=https://download.docker.com/linux/rhel/$releasever/$basearch/stable
+enabled=1
+gpgcheck=1
+gpgkey=https://download.docker.com/linux/rhel/gpg

.cloudbuild/graalvm-a.Dockerfile

@@ -12,10 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ghcr.io/graalvm/graalvm-community:21.0.2-ol7-20240116
+FROM ghcr.io/graalvm/graalvm-community:21.0.2-ol9-20240116
 
-RUN yum update -y && \
-    yum install -y wget unzip git && \
+# use microdnf, see https://github.com/graalvm/container/issues/10
+RUN microdnf update -y oraclelinux-release-el9 && \
+    microdnf install -y wget unzip git && \
     # Install maven
     wget -q https://archive.apache.org/dist/maven/maven-3/3.9.4/binaries/apache-maven-3.9.4-bin.zip -O /tmp/maven.zip && \
     unzip /tmp/maven.zip -d /tmp/maven && \
@@ -27,20 +28,22 @@ ENV PATH $PATH:/usr/local/lib/maven/bin
 
 # Install gcloud SDK
 COPY google-cloud-sdk.repo /etc/yum.repos.d/google-cloud-sdk.repo
-RUN yum install -y google-cloud-sdk
+RUN microdnf install -y google-cloud-sdk
 
 # Adding the package path to local
 ENV PATH $PATH:/usr/local/gcloud/google-cloud-sdk/bin
 
 # Install docker
-RUN yum install -y docker-engine docker-cli
+# See also https://docs.docker.com/engine/install/rhel/#set-up-the-repository
+COPY docker-ce.repo /etc/yum.repos.d/docker-ce.repo
+RUN microdnf install -y docker-ce docker-ce-cli
 
 # Install terraform
 # See also https://www.hashicorp.com/official-packaging-guide
 COPY hashicorp.repo /etc/yum.repos.d/hashicorp.repo
-RUN yum -y install terraform
+RUN microdnf -y install terraform
 
 # Install jq
-RUN yum -y install jq
+RUN microdnf -y install jq
 
 WORKDIR /workspace