volumes: Add volume import to allow importing contents on tar into volume

Following feature makes sure that users can load contents of external
tarball into the podman volumes.

Signed-off-by: flouthoc <flouthoc.git@gmail.com>

2 files changed, 60 insertions, 0 deletions

diff --git a/test/e2e/volume_create_test.go b/test/e2e/volume_create_test.go
index d9c805f46..3be1486d8 100644
--- a/test/e2e/volume_create_test.go
+++ b/test/e2e/volume_create_test.go
@@ -79,6 +79,50 @@ var _ = Describe("Podman volume create", func() {
 		Expect(check.OutputToString()).To(ContainSubstring("hello"))
 	})
 
+	It("podman create and import volume", func() {
+		if podmanTest.RemoteTest {
+			Skip("Volume export check does not work with a remote client")
+		}
+
+		session := podmanTest.Podman([]string{"volume", "create", "my_vol"})
+		session.WaitWithDefaultTimeout()
+		volName := session.OutputToString()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"run", "--volume", volName + ":/data", ALPINE, "sh", "-c", "echo hello >> " + "/data/test"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"volume", "export", volName, "--output=hello.tar"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"volume", "create", "my_vol2"})
+		session.WaitWithDefaultTimeout()
+		volName = session.OutputToString()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"volume", "import", "my_vol2", "hello.tar"})
+		session.WaitWithDefaultTimeout()
+		volName = session.OutputToString()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"run", "--volume", "my_vol2:/data", ALPINE, "cat", "/data/test"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.OutputToString()).To(ContainSubstring("hello"))
+	})
+
+	It("podman import volume should fail", func() {
+		// try import on volume or source which does not exists
+		if podmanTest.RemoteTest {
+			Skip("Volume export check does not work with a remote client")
+		}
+
+		session := podmanTest.Podman([]string{"volume", "import", "notfound", "notfound.tar"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).To(ExitWithError())
+	})
+
 	It("podman create volume with bad volume option", func() {
 		session := podmanTest.Podman([]string{"volume", "create", "--opt", "badOpt=bad"})
 		session.WaitWithDefaultTimeout()
diff --git a/test/system/160-volumes.bats b/test/system/160-volumes.bats
index 9a852db89..f6dc3f0af 100644
--- a/test/system/160-volumes.bats
+++ b/test/system/160-volumes.bats
@@ -186,6 +186,22 @@ EOF
 }
 
 
+# Podman volume import test
+@test "podman volume import test" {
+    skip_if_remote "volumes import is not applicable on podman-remote"
+    run_podman volume create my_vol
+    run_podman run --rm -v my_vol:/data $IMAGE sh -c "echo hello >> /data/test"
+    run_podman volume create my_vol2
+    run_podman volume export my_vol --output=hello.tar
+    # we want to use `run_podman volume export my_vol` but run_podman is wrapping EOF
+    cat hello.tar | run_podman volume import my_vol2 -
+    run_podman run --rm -v my_vol2:/data $IMAGE sh -c "cat /data/test"
+    is "$output" "hello" "output from second container"
+    run_podman volume rm my_vol
+    run_podman volume rm my_vol2
+}
+
+
 # Confirm that container sees the correct id
 @test "podman volume with --userns=keep-id" {
     is_rootless || skip "only meaningful when run rootless"