do not commit default volumes from container

when performing a container commit, we should not add the default list of volumes
for a container to the resulting image.  it will cause the resulting image to crash
when run subsequently.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #699
Approved by: mheon

cmd/podman/commit.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -120,7 +121,17 @@ func commitCmd(c *cli.Context) error {
 		Changes:       c.StringSlice("change"),
 		Author:        c.String("author"),
 	}
-	newImage, err := ctr.Commit(getContext(), reference, options)
+	var createArtifact createConfig
+	artifact, err := ctr.GetArtifact("create-config")
+	if err == nil {
+		if err := json.Unmarshal(artifact, &createArtifact); err != nil {
+			return err
+		}
+	}
+	mounts := getMounts(createArtifact.Volumes, true)
+	command := createArtifact.Command
+	entryPoint := createArtifact.Entrypoint
+	newImage, err := ctr.Commit(getContext(), reference, options, strings.Split(mounts, ","), command, entryPoint)
 	if err != nil {
 		return err
 	}

libpod/container_commit.go

@@ -26,7 +26,7 @@ type ContainerCommitOptions struct {
 
 // Commit commits the changes between a container and its image, creating a new
 // image
-func (c *Container) Commit(ctx context.Context, destImage string, options ContainerCommitOptions) (*image.Image, error) {
+func (c *Container) Commit(ctx context.Context, destImage string, options ContainerCommitOptions, mounts, command, entryPoint []string) (*image.Image, error) {
 	if !c.batched {
 		c.lock.Lock()
 		defer c.lock.Unlock()
@@ -74,11 +74,15 @@ func (c *Container) Commit(ctx context.Context, destImage string, options Contai
 	// add it to the resulting image.
 
 	// Entrypoint - always set this first or cmd will get wiped out
-	importBuilder.SetEntrypoint(c.Spec().Process.Args)
+	if len(entryPoint) > 0 {
+		importBuilder.SetEntrypoint(entryPoint)
+	}
+
 	// Cmd
-	// We cannot differentiate between cmd and entrypoint here
-	// so we assign args to both
-	importBuilder.SetCmd(c.Spec().Process.Args)
+	if len(command) > 0 {
+		importBuilder.SetCmd(command)
+	}
+
 	// Env
 	for _, e := range c.config.Spec.Process.Env {
 		splitEnv := strings.Split(e, "=")
@@ -96,8 +100,10 @@ func (c *Container) Commit(ctx context.Context, destImage string, options Contai
 	// User
 	importBuilder.SetUser(c.User())
 	// Volumes
-	for _, v := range c.config.Spec.Mounts {
-		importBuilder.AddVolume(v.Source)
+	for _, v := range mounts {
+		if v != "" {
+			importBuilder.AddVolume(v)
+		}
 	}
 	// Workdir
 	importBuilder.SetWorkDir(c.Spec().Process.Cwd)

test/e2e/commit_test.go

@@ -110,4 +110,26 @@ var _ = Describe("Podman commit", func() {
 		check.WaitWithDefaultTimeout()
 		Expect(check.ExitCode()).To(Equal(0))
 	})
+
+	It("podman commit with volume mounts", func() {
+		s := podmanTest.Podman([]string{"run", "--name", "test1", "-v", "/tmp:/foo", "alpine", "date"})
+		s.WaitWithDefaultTimeout()
+		Expect(s.ExitCode()).To(Equal(0))
+
+		c := podmanTest.Podman([]string{"commit", "test1", "newimage"})
+		c.WaitWithDefaultTimeout()
+		Expect(c.ExitCode()).To(Equal(0))
+
+		inspect := podmanTest.Podman([]string{"inspect", "newimage"})
+		inspect.WaitWithDefaultTimeout()
+		Expect(inspect.ExitCode()).To(Equal(0))
+		image := inspect.InspectImageJSON()
+		_, ok := image[0].ContainerConfig.Volumes["/tmp"]
+		Expect(ok).To(BeTrue())
+
+		r := podmanTest.Podman([]string{"run", "newimage"})
+		r.WaitWithDefaultTimeout()
+		Expect(r.ExitCode()).To(Equal(0))
+	})
+
 })