name: probe
on: [push]
jobs:
    probe:
        runs-on: ubuntu-latest
        steps:
            # actions/checkout v4.2.2, 2026-02-22
            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
            - run: |
                  set -x
                  id
                  pwd
                  cat /etc/hostname
                  docker version || true
                  docker info --format '{{.Driver}} {{.ServerVersion}}' || true
                  echo "--- mountinfo ---"
                  cat /proc/self/mountinfo
                  echo "--- inspect self by hostname ---"
                  docker inspect "$(cat /etc/hostname)" --format '{{json .Mounts}}' || true
                  echo "--- bind mount probe ---"
                  docker run --rm -v "$PWD:/work" -w /work alpine:3 ls -la /work | head -20 || true
                  echo "--- named volume probe ---"
                  VOL=$(docker inspect "$(cat /etc/hostname)" --format '{{range .Mounts}}{{if eq .Destination "/workspace"}}{{.Name}}{{end}}{{end}}' || true)
                  echo "VOL=$VOL"
                  docker run --rm -v "$VOL:/workspace" -w "$PWD" alpine:3 ls -la . | head -20 || true
                  echo "--- shm in docker run default ---"
                  docker run --rm alpine:3 df -h /dev/shm || true