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authorDaniel J Walsh <dwalsh@redhat.com>2021-05-13 08:45:29 -0400
committerDaniel J Walsh <dwalsh@redhat.com>2021-05-19 07:55:48 -0400
commitbc0e12a047cce2cc717320257545663073383f48 (patch)
treeca6e4710bd3b6894c736b33f45199bd9519f012d /test/e2e/cp_test.go
parent18efc5a3a78ba7352e42517ba251212833b4583d (diff)
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Fix problem copying files when container is in host pid namespace
When attempting to copy files into and out of running containers within the host pidnamespace, the code was attempting to join the host pidns again, and getting an error. This was causing the podman cp command to fail. Since we are already in the host pid namespace, we should not be attempting to join. This PR adds a check to see if the container is in NOT host pid namespace, and only then attempts to join. Fixes: https://github.com/containers/podman/issues/9985 Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Diffstat (limited to 'test/e2e/cp_test.go')
-rw-r--r--test/e2e/cp_test.go44
1 files changed, 44 insertions, 0 deletions
diff --git a/test/e2e/cp_test.go b/test/e2e/cp_test.go
index c0fb3f887..be4901833 100644
--- a/test/e2e/cp_test.go
+++ b/test/e2e/cp_test.go
@@ -91,6 +91,50 @@ var _ = Describe("Podman cp", func() {
Expect(roundtripContent).To(Equal(originalContent))
})
+ // Copy a file to the container, then back to the host in --pid=host
+ It("podman cp --pid=host file", func() {
+ SkipIfRootlessCgroupsV1("Not supported for rootless + CGroupsV1")
+ srcFile, err := ioutil.TempFile("", "")
+ Expect(err).To(BeNil())
+ defer srcFile.Close()
+ defer os.Remove(srcFile.Name())
+
+ originalContent := []byte("podman cp file test")
+ err = ioutil.WriteFile(srcFile.Name(), originalContent, 0644)
+ Expect(err).To(BeNil())
+
+ // Create a container. NOTE that container mustn't be running for copying.
+ session := podmanTest.Podman([]string{"create", "--pid=host", ALPINE, "top"})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+ name := session.OutputToString()
+
+ session = podmanTest.Podman([]string{"start", name})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+
+ // The file will now be created (and written to).
+ session = podmanTest.Podman([]string{"cp", srcFile.Name(), name + ":foo"})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+
+ // Copy FROM the container.
+
+ destFile, err := ioutil.TempFile("", "")
+ Expect(err).To(BeNil())
+ defer destFile.Close()
+ defer os.Remove(destFile.Name())
+
+ session = podmanTest.Podman([]string{"cp", name + ":foo", destFile.Name()})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+
+ // Now make sure the content matches.
+ roundtripContent, err := ioutil.ReadFile(destFile.Name())
+ Expect(err).To(BeNil())
+ Expect(roundtripContent).To(Equal(originalContent))
+ })
+
// Create a symlink in the container, use it as a copy destination and
// make sure that the link and the resolved path are accessible and
// give the right content.