add exec command

this command can run user commands inside container. This feature will be used
in kubevirtci to copy file within container into speacial folder which is mounted at
the same time in container and host. With this we can copy files from container to host,
without any hacks.

Signed-off-by: Karel Šimon <ksimon@redhat.com>

cmd/exec.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"context"
+	"os"
+
+	"github.com/fromanirh/pack8s/internal/pkg/podman"
+	"github.com/spf13/cobra"
+)
+
+type execOptions struct {
+	commands []string
+}
+
+var execOpt execOptions
+
+// NewExecCommand runs given command inside container
+func NewExecCommand() *cobra.Command {
+	exec := &cobra.Command{
+		Use:   "exec",
+		Short: "exec runs given command in container",
+		RunE:  execCommand,
+	}
+
+	exec.Flags().StringArrayVar(&execOpt.commands, "commands", []string{}, "commands which will be executed in container")
+
+	return exec
+}
+
+func execCommand(cmd *cobra.Command, args []string) error {
+	containerID := args[0]
+
+	podmanSocket, err := cmd.Flags().GetString("podman-socket")
+	if err != nil {
+		return err
+	}
+
+	ctx := context.Background()
+
+	hnd, err := podman.NewHandle(ctx, podmanSocket)
+	if err != nil {
+		return err
+	}
+
+	return hnd.Exec(containerID, execOpt.commands, os.Stdout)
+}

cmd/okd/run.go

@@ -35,6 +35,7 @@ type okdRunOptions struct {
 	sshWorkerPort  uint
 	background     bool
 	randomPorts    bool
+	volume         string
 }
 
 var okdRunOpts okdRunOptions
@@ -64,6 +65,7 @@ func NewRunCommand() *cobra.Command {
 	run.Flags().UintVar(&okdRunOpts.sshWorkerPort, "ssh-worker-port", 0, "port on localhost to ssh to worker node")
 	run.Flags().BoolVar(&okdRunOpts.background, "background", false, "go to background after nodes are up")
 	run.Flags().BoolVar(&okdRunOpts.randomPorts, "random-ports", true, "expose all ports on random localhost ports")
+	run.Flags().StringVar(&okdRunOpts.volume, "volume", "", "Bind mount a volume into the container")
 	return run
 }
 
@@ -157,6 +159,7 @@ func run(cmd *cobra.Command, args []string) (err error) {
 		Privileged: &okdRunOpts.privileged,
 		Publish:    &clusterPorts,
 		PublishAll: &okdRunOpts.randomPorts,
+		Volume:     &[]string{okdRunOpts.volume},
 	})
 	if err != nil {
 		return err

cmd/root.go

@@ -34,6 +34,7 @@ func NewRootCommand() *cobra.Command {
 		NewSSHCommand(),
 		NewShowCommand(),
 		NewPruneVolumesCommand(),
+		NewExecCommand(),
 	)
 
 	return root