Images: Drop s390x. (#12138)

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

.github/workflows/images.yaml

@@ -189,7 +189,7 @@ jobs:
     if: |
       (github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.changes.outputs.nginx == 'true')
     env:
-      PLATFORMS: linux/amd64,linux/arm,linux/arm64,linux/s390x
+      PLATFORMS: linux/amd64,linux/arm,linux/arm64
     steps:
       - name: Checkout
         uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0

Makefile

@@ -240,8 +240,8 @@ ensure-buildx:
 show-version:
 	echo -n $(TAG)
 
-PLATFORMS ?= amd64 arm arm64 s390x
-BUILDX_PLATFORMS ?= linux/amd64,linux/arm,linux/arm64,linux/s390x
+PLATFORMS ?= amd64 arm arm64
+BUILDX_PLATFORMS ?= linux/amd64,linux/arm,linux/arm64
 
 .PHONY: release # Build a multi-arch docker image
 release: ensure-buildx clean

hack/init-buildx.sh

@@ -42,12 +42,11 @@ fi
 # We can skip setup if the current builder already has multi-arch
 # AND if it isn't the docker driver, which doesn't work
 current_builder="$(docker buildx inspect)"
-# linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
+# linux/amd64, linux/arm, linux/arm64
 if ! grep -q "^Driver: docker$"  <<<"${current_builder}" && \
      grep -q "linux/amd64" <<<"${current_builder}" && \
      grep -q "linux/arm"   <<<"${current_builder}" && \
-     grep -q "linux/arm64" <<<"${current_builder}" && \
-     grep -q "linux/s390x" <<<"${current_builder}"; then
+     grep -q "linux/arm64" <<<"${current_builder}"; then
   exit 0
 fi
 

images/Makefile

@@ -41,7 +41,7 @@ EXTRAARGS ?= $(shell cat $(NAME)/EXTRAARGS)
 export DOCKER_CLI_EXPERIMENTAL=enabled
 
 # build with buildx
-PLATFORMS?=linux/amd64,linux/arm,linux/arm64,linux/s390x
+PLATFORMS?=linux/amd64,linux/arm,linux/arm64
 OUTPUT=
 PROGRESS=plain
 

images/nginx/Makefile

@@ -32,7 +32,7 @@ IMAGE = $(REGISTRY)/nginx
 export DOCKER_CLI_EXPERIMENTAL=enabled
 
 # build with buildx
-PLATFORMS?=linux/amd64,linux/arm,linux/arm64,linux/s390x
+PLATFORMS?=linux/amd64,linux/arm,linux/arm64
 OUTPUT=
 PROGRESS=plain
 build: ensure-buildx