add exec command

this command can run user commands inside container. This will help to e.g.
copy files inside container to special folder, which is mounted inside container
and host.

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

cmd/exec.go

@@ -0,0 +1,47 @@
+package cmd
+
+import (
+	"context"
+	"os"
+
+	"github.com/fromanirh/pack8s/internal/pkg/podman"
+	"github.com/spf13/cobra"
+)
+
+type execOptions struct {
+	command 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:  runCommand,
+		Args:  cobra.ExactArgs(1),
+	}
+
+	exec.Flags().StringVarP(&execOpt.command, "command", "x", "", "command which will be executed in container")
+
+	return exec
+}
+
+func runCommand(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, []string{execOpt.command}, os.Stdout)
+}

cmd/okd/run.go

@@ -34,6 +34,7 @@ type okdRunOptions struct {
 	sshWorkerPort  uint
 	background     bool
 	randomPorts    bool
+	volume         string
 }
 
 var okdRunOpts okdRunOptions
@@ -62,6 +63,7 @@ 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
 }
 
@@ -154,6 +156,7 @@ 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