Merge pull request #2122 from aojea/btrfs

podman: mount dev mapper for btrfs and zfs storage

pkg/cluster/internal/providers/podman/provision.go

@@ -161,6 +161,12 @@ func commonArgs(cfg *config.Cluster, networkName string) ([]string, error) {
 		args = append(args, "-e", fmt.Sprintf("%s=%s", key, val))
 	}
 
+	// handle Podman on Btrfs or ZFS same as we do with Docker
+	// https://github.com/kubernetes-sigs/kind/issues/1416#issuecomment-606514724
+	if mountDevMapper() {
+		args = append(args, "--volume", "/dev/mapper:/dev/mapper")
+	}
+
 	return args, nil
 }
 

pkg/cluster/internal/providers/podman/util.go

@@ -115,3 +115,19 @@ func deleteVolumes(names []string) error {
 	cmd := exec.Command("podman", args...)
 	return cmd.Run()
 }
+
+// mountDevMapper checks if the podman storage driver is Btrfs or ZFS
+func mountDevMapper() bool {
+	storage := ""
+	cmd := exec.Command("podman", "info", "-f",
+		`{{ index .Store.GraphStatus "Backing Filesystem"}}`)
+	lines, err := exec.OutputLines(cmd)
+	if err != nil {
+		return false
+	}
+
+	if len(lines) > 0 {
+		storage = strings.ToLower(strings.TrimSpace(lines[0]))
+	}
+	return storage == "btrfs" || storage == "zfs"
+}