CI: add AlmaLinux 8 VM for cgroup v1 testing

Fix issue 3942

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

hack/ci/init-fedora.sh

@@ -1,18 +0,0 @@
-#!/bin/bash
-set -eux -o pipefail
-# Ensure network-related modules to be loaded
-modprobe tap ip_tables iptable_nat ip6_tables ip6table_nat
-
-# The moby-engine package included in Fedora lacks support for rootless,
-# So we need to install docker-ce and docker-ce-rootless-extras from the upstream.
-curl -fsSL https://get.docker.com | sh
-dnf install -y golang-go make kubernetes-client podman docker-ce-rootless-extras
-systemctl enable --now docker
-
-# Configuration for rootless: https://kind.sigs.k8s.io/docs/user/rootless/
-mkdir -p "/etc/systemd/system/user@.service.d"
-cat <<EOF >"/etc/systemd/system/user@.service.d/delegate.conf"
-[Service]
-Delegate=yes
-EOF
-systemctl daemon-reload

hack/ci/init-vm.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+set -eux -o pipefail
+# Ensure network-related modules to be loaded
+modprobe tap ip_tables iptable_nat ip6_tables ip6table_nat
+
+# The moby-engine package included in Fedora lacks support for rootless,
+# So we need to install docker-ce and docker-ce-rootless-extras from the upstream.
+DNF_REPO=""
+INSTALL_PODMAN="1"
+if grep -q centos /etc/os-release; then
+	# Works with Rocky and Alma too
+	DNF_REPO="https://download.docker.com/linux/centos/docker-ce.repo"
+	if grep -q el8 /etc/os-release; then
+		# podman seems to conflict with docker-ce on EL8
+		INSTALL_PODMAN=""
+	fi
+elif grep -q fedora /etc/os-release; then
+	DNF_REPO="https://download.docker.com/linux/fedora/docker-ce.repo"
+else
+	echo >&2 "Unsupported OS"
+	exit 1
+fi
+DNF="dnf"
+if command -v dnf5 &>/dev/null; then
+	# DNF 5 (Fedora 41 or later)
+	DNF="dnf5"
+	"$DNF" config-manager addrepo --from-repofile="${DNF_REPO}"
+else
+	# DNF 4
+	"$DNF" config-manager --add-repo="${DNF_REPO}"
+fi
+"$DNF" install -y git golang make docker-ce docker-ce-rootless-extras
+systemctl enable --now docker
+if [ -n "${INSTALL_PODMAN}" ]; then
+	"$DNF" install -y podman
+fi
+
+# Install kubectl
+GOARCH="$(uname -m | sed -e 's/aarch64/arm64/' -e 's/x86_64/amd64/')"
+curl -L -o /usr/bin/kubectl "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/${GOARCH}/kubectl"
+chmod +x /usr/bin/kubectl
+
+# Configuration for rootless: https://kind.sigs.k8s.io/docs/user/rootless/
+mkdir -p "/etc/systemd/system/user@.service.d"
+cat <<EOF >"/etc/systemd/system/user@.service.d/delegate.conf"
+[Service]
+Delegate=yes
+EOF
+systemctl daemon-reload