CI: add nerdctl

Signed-off-by: Akihiro Suda <[email protected]>

.github/workflows/main.yaml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        engine: [docker, podman]
+        engine: [docker, nerdctl, podman]
     env:
       CONTAINER_ENGINE: "${{ matrix.engine }}"
     steps:
@@ -37,6 +37,12 @@ jobs:
           sudo rm -rf /var/run/docker*
           dockerd-rootless-setuptool.sh install
           docker info
+      - name: Set up Rootless nerdctl
+        if: ${{ matrix.engine == 'nerdctl' }}
+        run: |
+          set -eux -o pipefail
+          sudo ./init-host/init-host.root.d/install-nerdctl.sh
+          nerdctl info
       - name: Set up Rootless Podman
         if: ${{ matrix.engine == 'podman' }}
         run: |
@@ -69,6 +75,8 @@ jobs:
         include:
           - lxc-image: ubuntu:22.04
             engine: docker
+          - lxc-image: ubuntu:22.04
+            engine: nerdctl
           - lxc-image: images:fedora/39/cloud
             engine: podman
     env:

init-host/init-host.root.sh

@@ -57,9 +57,9 @@ case "${CONTAINER_ENGINE}" in
 	fi
 	systemctl disable --now docker
 	;;
-"podman")
-	if ! command -v podman >/dev/null 2>&1; then
-		"${script_dir}"/init-host.root.d/install-podman.sh
+"podman" | "nerdctl")
+	if ! command -v "${CONTAINER_ENGINE}" >/dev/null 2>&1; then
+		"${script_dir}"/init-host.root.d/install-"${CONTAINER_ENGINE}".sh
 	fi
 	;;
 *)

init-host/init-host.rootless.sh

@@ -11,6 +11,11 @@ case "${CONTAINER_ENGINE}" in
 "docker")
 	dockerd-rootless-setuptool.sh install
 	;;
+"nerdctl")
+	containerd-rootless-setuptool.sh install
+	containerd-rootless-setuptool.sh install-buildkit-containerd
+	containerd-rootless-setuptool.sh install-bypass4netnsd
+	;;
 "podman")
 	systemctl --user enable --now podman-restart
 	;;