Try switching from CentOS to Almalinux

.github/workflows/docker-publish.yml

@@ -45,7 +45,7 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           pull: true
 
-  centos-build:
+  rhel-compat-build:
     runs-on: ${{ matrix.runner }}
     strategy:
       fail-fast: false
@@ -66,7 +66,7 @@ jobs:
           images: ${{ env.REGISTRY_IMAGE }}
           flavor: |
             latest=false
-            prefix=centos-9-
+            prefix=rhelcompat-9-
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -82,7 +82,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
-          file: centos.Dockerfile
+          file: rhel-compat.Dockerfile
           labels: ${{ steps.meta.outputs.labels }}
           outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
           pull: true
@@ -101,10 +101,10 @@ jobs:
           if-no-files-found: error
           retention-days: 1
 
-  centos-push:
+  rhel-compat-push:
     runs-on: ubuntu-latest
     needs:
-      - centos-build
+      - rhel-compat-build
     steps:
       - name: Download x64 digest
         uses: actions/download-artifact@v4
@@ -127,7 +127,7 @@ jobs:
           images: ${{ env.REGISTRY_IMAGE }}
           flavor: |
             latest=false
-            prefix=centos-9-
+            prefix=rhelcompat-9-
 
       - name: Login to Docker Hub
         uses: docker/login-action@v3

README.md

@@ -1,7 +1,7 @@
 # Images built:
 
 - `gocddev/gocd-dev-build:dind-<github_tag>`
-- `gocddev/gocd-dev-build:centos-9-<github_tag>`
+- `gocddev/gocd-dev-build:rhelcompat-9-<github_tag>`
 - `gocddev/gocd-dev-build:ubuntu-24-04-<github_tag>`
 - `gocddev/gocd-dev-build:windows2025-<github_tag>`
 
@@ -10,7 +10,7 @@ To build a new version of the images, push a new version tag to this repository.
 # Build an image locally
 
 - ```docker build . --pull -t gocddev/gocd-dev-build:dind-SNAPSHOT -f dind.Dockerfile```
-- ```docker build . --pull -t gocddev/gocd-dev-build:centos-9-SNAPSHOT -f centos.Dockerfile```
+- ```docker build . --pull -t gocddev/gocd-dev-build:rhelcompat-9-SNAPSHOT -f rhel-compat.Dockerfile```
 - ```docker build . --pull -t gocddev/gocd-dev-build:ubuntu-24-04-SNAPSHOT -f ubuntu.Dockerfile```
 - ```docker build . --pull -t gocddev/gocd-dev-build:windows2025-SNAPSHOT -f windowsservercore.Dockerfile```
 

provision/provision-centos.sh → provision/provision-rhel-compat.sh

@@ -22,7 +22,7 @@ ANT_VERSION=1.10.15 # https://ant.apache.org/bindownload.cgi
 P4_VERSION=24.1 # https://cdist2.perforce.com/perforce/
 P4D_VERSION=24.1
 
-CENTOS_MAJOR_VERSION=$(rpm -qa \*-release | grep -Ei "oracle|redhat|centos" | cut -d"-" -f4 | cut -d"." -f1)
+RHEL_COMPAT_MAJOR_VERSION=$(rpm -qa \*-release | grep -Ei "oracle|redhat|centos|alma|rocky" | cut -d"-" -f4 | cut -d"." -f1)
 # import functions
 source "$(dirname $0)/provision-common.sh"
 
@@ -92,7 +92,7 @@ function provision() {
 }
 
 function setup_epel() {
-  try dnf -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-${CENTOS_MAJOR_VERSION}.noarch.rpm
+  try dnf -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-${RHEL_COMPAT_MAJOR_VERSION}.noarch.rpm
 }
 
 function setup_external_repos() {
@@ -169,7 +169,7 @@ function install_awscli_mimetypes() {
 }
 
 function setup_postgres_repo() {
-  try dnf -y install https://download.postgresql.org/pub/repos/yum/reporpms/EL-$CENTOS_MAJOR_VERSION-$(arch)/pgdg-redhat-repo-latest.noarch.rpm
+  try dnf -y install https://download.postgresql.org/pub/repos/yum/reporpms/EL-$RHEL_COMPAT_MAJOR_VERSION-$(arch)/pgdg-redhat-repo-latest.noarch.rpm
 }
 
 function install_postgresql() {
@@ -243,7 +243,7 @@ function build_gocd() {
 }
 
 function install_docker() {
-  try dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
+  try dnf config-manager --add-repo https://download.docker.com/linux/rhel/docker-ce.repo
   try dnf -y install docker-ce containerd.io docker-buildx-plugin
   try usermod -a -G docker ${PRIMARY_USER}
 }

centos.Dockerfile → rhel-compat.Dockerfile

@@ -1,12 +1,12 @@
-FROM quay.io/centos/centos:stream9
+FROM almalinux:9-minimal
 LABEL org.opencontainers.image.authors="GoCD Team <[email protected]>"
 
 ARG BUILDARCH
 ARG TARGETARCH
 
 COPY provision /usr/local/src/provision/
 
-RUN /usr/local/src/provision/provision-centos.sh
+RUN /usr/local/src/provision/provision-rhel-compat.sh
 
 ENTRYPOINT ["/usr/bin/tini", "--"]