Remove pack8s and document how to use kubevirtci with podman (kubevirt#610)

* Remove pack8s source code

Signed-off-by: Roman Mohr <[email protected]>

* Detect CRI for running gocli itself

Let the common script detect the working runtime client binary (docker
or podman) and use it to pull and run gocli.

Signed-off-by: Roman Mohr <[email protected]>

* Lift sudo requirement for podman

Expect podman socket to exist at `${HOME}/podman.sock`.

Signed-off-by: Roman Mohr <[email protected]>

* Add very minimal podman documentation

Signed-off-by: Roman Mohr <[email protected]>

* Reintroduce runtime selection variable

Allow exlicit selection of the runtime via an env variable and improve
the runtime detection for podman.

Signed-off-by: Roman Mohr <[email protected]>

Author: rmohr

PODMAN.md

@@ -0,0 +1,17 @@
+# Use kubevirtci with podman instead of docker
+
+Install podman 3.1+, then run it in docker compatible mode:
+
+```
+podman system service -t 0 unix:///${HOME}/podman.sock
+```
+
+After this command, you can use kubevirtci with the typical `make cluster-*`
+commands.
+
+This will use `fuse-overlayfs` as storage layer. If the performance is not
+satisfactory, consider running podman as root to use plain `overlayfs2`:
+
+```
+sudo podman system service -t 0 unix:///${HOME}/podman.sock
+```

README.md

@@ -10,6 +10,10 @@ See [K8S.md](K8S.md)
 
 See [KUBEVIRTCI_LOCAL_TESTING.md](KUBEVIRTCI_LOCAL_TESTING.md)
 
+## Using podman instead of docker
+
+See [PODMAN.md](PODMAN.md)
+
 ## Contributing
 
 Please see [CONTRIBUTING.md](CONTRIBUTING.md) for details on how to contribute. 

cluster-up/cluster/ephemeral-provider-common.sh

@@ -15,17 +15,34 @@ if [ -n "${KUBEVIRTCI_TAG}" ] && [ -n "${KUBEVIRTCI_GOCLI_CONTAINER}" ]; then
 fi
 
 if [ "${KUBEVIRTCI_RUNTIME}" = "podman" ]; then
-    _cli="pack8s"
+	_cri_bin=podman
+	_docker_socket="${HOME}/podman.sock"
+elif [ "${KUBEVIRTCI_RUNTIME}" = "docker" ]; then
+	_cri_bin=docker
+	_docker_socket="/var/run/docker.sock"
 else
-    _cli_container="${KUBEVIRTCI_GOCLI_CONTAINER:-quay.io/kubevirtci/gocli:${KUBEVIRTCI_TAG}}"
-    _cli="docker run --privileged --net=host --rm ${USE_TTY} -v /var/run/docker.sock:/var/run/docker.sock"
-    # gocli will try to mount /lib/modules to make it accessible to dnsmasq in
-    # in case it exists
-    if [ -d /lib/modules ]; then
-        _cli="${_cli} -v /lib/modules/:/lib/modules/"
-    fi
-    _cli="${_cli} ${_cli_container}"
+	if curl --unix-socket /${HOME}/podman.sock http://d/v3.0.0/libpod/info > /dev/null 2>&1 ; then
+		_cri_bin=podman
+		_docker_socket="${HOME}/podman.sock"
+		echo "selecting podman as container runtime"
+	elif docker ps >/dev/null; then
+		_cri_bin=docker
+		_docker_socket="/var/run/docker.sock"
+		echo "selecting docker as container runtime"
+	else
+		echo "no working container runtime found. Neither docker nor podman seems to work."
+		exit 1
+	fi
+fi
+
+_cli_container="${KUBEVIRTCI_GOCLI_CONTAINER:-quay.io/kubevirtci/gocli:${KUBEVIRTCI_TAG}}"
+_cli="${_cri_bin} run --privileged --net=host --rm ${USE_TTY} -v ${_docker_socket}:/var/run/docker.sock"
+# gocli will try to mount /lib/modules to make it accessible to dnsmasq in
+# in case it exists
+if [ -d /lib/modules ]; then
+    _cli="${_cli} -v /lib/modules/:/lib/modules/"
 fi
+_cli="${_cli} ${_cli_container}"
 
 function _main_ip() {
     echo 127.0.0.1