CI: add actuated-arm64-4cpu-12gb

See <https://actuated.dev/blog/arm-ci-cncf-ampere>.
Thanks to Alex Ellis, Ampere Computing, and Equinix.

Host information:
* CPU: aarch64 (ARMv8), 4 cores
* RAM: 10 GiB, no swap
* Kernel: 5.10.201
  * Lacks CONFIG_CHECKPOINT_RESTORE, CONFIG_BLK_CGROUP_IOCOST, etc.
* Cgroup: v2
* OS: Ubuntu 22.04
  * Lacks newuidmap, newgidmap, etc. (still apt-gettable)

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

.github/workflows/test.yml

@@ -23,7 +23,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04]
+        # actuated-arm64-4cpu-12gb is missing CONFIG_CHECKPOINT_RESTORE
+        os: [ubuntu-20.04, ubuntu-22.04, actuated-arm64-4cpu-12gb]
         go-version: [1.20.x, 1.21.x]
         rootless: ["rootless", ""]
         race: ["-race", ""]
@@ -40,19 +41,50 @@ jobs:
             criu: criu-dev
           - dmz: runc_nodmz
             os: ubuntu-20.04
+          - go-version: 1.20.x
+            os: actuated-arm64-4cpu-12gb
+          - race: "-race"
+            os: actuated-arm64-4cpu-12gb
+          - criu: criu-dev
+            os: actuated-arm64-4cpu-12gb
+          - dmz: runc_nodmz
+            os: actuated-arm64-4cpu-12gb
+
     runs-on: ${{ matrix.os }}
 
     steps:
 
     - name: checkout
       uses: actions/checkout@v4
 
+    - name: Show host info
+      run: |
+        set -x
+        # Sync `set -x` outputs with command ouputs
+        exec 2>&1
+        # Version
+        uname -a
+        cat /etc/os-release
+        # Hardware
+        cat /proc/cpuinfo
+        free -mt
+        # cgroup
+        ls -F /sys/fs/cgroup
+        cat /proc/self/cgroup
+        if [ -e /sys/fs/cgroup/cgroup.controllers ]; then
+          cat /sys/fs/cgroup/cgroup.controllers
+          cat /sys/fs/cgroup/cgroup.subtree_control
+          ls -F /sys/fs/cgroup$(grep -oP '0::\K.*' /proc/self/cgroup)
+        fi
+        # kernel config
+        script/check-config.sh
+
     - name: install deps
       if: matrix.criu == ''
       env:
         PREFIX: https://download.opensuse.org/repositories/devel:/tools:/criu/xUbuntu
       run: |
-        packages="libseccomp-dev sshfs"
+        packages="libseccomp-dev sshfs uidmap"
         if script/check-config.sh | grep -q "CONFIG_CHECKPOINT_RESTORE:\s*enabled"; then
           # criu repo
           REPO=${PREFIX}_$(echo ${{ matrix.os }} | sed 's/.*-//')
@@ -69,7 +101,7 @@ jobs:
       if: matrix.criu != ''
       run: |
         sudo apt -q update
-        sudo apt -q install -y libseccomp-dev sshfs \
+        sudo apt -q install -y libseccomp-dev sshfs uidmap \
           libcap-dev libnet1-dev libnl-3-dev \
           libprotobuf-c-dev libprotobuf-dev protobuf-c-compiler protobuf-compiler
         git clone https://github.com/checkpoint-restore/criu.git ~/criu

README.md

@@ -6,6 +6,7 @@
 [![gha/validate](https://github.com/opencontainers/runc/workflows/validate/badge.svg)](https://github.com/opencontainers/runc/actions?query=workflow%3Avalidate)
 [![gha/ci](https://github.com/opencontainers/runc/workflows/ci/badge.svg)](https://github.com/opencontainers/runc/actions?query=workflow%3Aci)
 [![CirrusCI](https://api.cirrus-ci.com/github/opencontainers/runc.svg)](https://cirrus-ci.com/github/opencontainers/runc)
+<a href="https://actuated.dev"><img alt="Arm CI sponsored by Actuated" src="https://docs.actuated.dev/images/actuated-badge.png" width="120px"></img></a>
 
 ## Introduction