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https://github.com/containers/podman.git
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fc6dcd12b3
We added the concept of image volumes in 2.2.0, to support inspecting an image from within a container. However, this is a strictly read-only mount, with no modification allowed. By contrast, the new `image` volume driver creates a c/storage container as its underlying storage, so we have a read/write layer. This, in and of itself, is not especially interesting, but what it will enable in the future is. If we add a new command to allow these image volumes to be committed, we can now distribute volumes - and changes to them - via a standard OCI image registry (which is rather new and quite exciting). Future work in this area: - Add support for `podman volume push` (commit volume changes and push resulting image to OCI registry). - Add support for `podman volume pull` (currently, we require that the image a volume is created from be already pulled; it would be simpler if we had a dedicated command that did the pull and made a volume from it) - Add support for scratch images (make an empty image on demand to use as the base of the volume) - Add UOR support to `podman volume push` and `podman volume pull` to enable both with non-image volume drivers Signed-off-by: Matthew Heon <matthew.heon@pm.me>
220 lines
7.9 KiB
Go
220 lines
7.9 KiB
Go
package integration
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import (
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"fmt"
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"os"
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"path/filepath"
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. "github.com/containers/podman/v4/test/utils"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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. "github.com/onsi/gomega/gexec"
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)
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var _ = Describe("Podman volume create", func() {
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var (
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tempdir string
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err error
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podmanTest *PodmanTestIntegration
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)
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BeforeEach(func() {
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tempdir, err = CreateTempDirInTempDir()
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if err != nil {
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os.Exit(1)
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}
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podmanTest = PodmanTestCreate(tempdir)
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podmanTest.Setup()
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})
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AfterEach(func() {
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podmanTest.CleanupVolume()
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f := CurrentGinkgoTestDescription()
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processTestResult(f)
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})
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It("podman create volume", func() {
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session := podmanTest.Podman([]string{"volume", "create"})
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session.WaitWithDefaultTimeout()
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volName := session.OutputToString()
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Expect(session).Should(Exit(0))
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check := podmanTest.Podman([]string{"volume", "ls", "-q"})
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check.WaitWithDefaultTimeout()
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Expect(check.OutputToString()).To(ContainSubstring(volName))
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Expect(check.OutputToStringArray()).To(HaveLen(1))
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})
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It("podman create volume with name", func() {
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session := podmanTest.Podman([]string{"volume", "create", "myvol"})
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session.WaitWithDefaultTimeout()
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volName := session.OutputToString()
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Expect(session).Should(Exit(0))
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check := podmanTest.Podman([]string{"volume", "ls", "-q"})
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check.WaitWithDefaultTimeout()
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Expect(check.OutputToString()).To(ContainSubstring(volName))
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Expect(check.OutputToStringArray()).To(HaveLen(1))
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})
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It("podman create and export volume", func() {
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if podmanTest.RemoteTest {
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Skip("Volume export check does not work with a remote client")
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}
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session := podmanTest.Podman([]string{"volume", "create", "myvol"})
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session.WaitWithDefaultTimeout()
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volName := session.OutputToString()
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Expect(session).Should(Exit(0))
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session = podmanTest.Podman([]string{"run", "--volume", volName + ":/data", ALPINE, "sh", "-c", "echo hello >> " + "/data/test"})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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check := podmanTest.Podman([]string{"volume", "export", volName})
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check.WaitWithDefaultTimeout()
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Expect(check.OutputToString()).To(ContainSubstring("hello"))
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})
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It("podman create and import volume", func() {
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if podmanTest.RemoteTest {
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Skip("Volume export check does not work with a remote client")
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}
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session := podmanTest.Podman([]string{"volume", "create", "my_vol"})
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session.WaitWithDefaultTimeout()
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volName := session.OutputToString()
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Expect(session).Should(Exit(0))
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session = podmanTest.Podman([]string{"run", "--volume", volName + ":/data", ALPINE, "sh", "-c", "echo hello >> " + "/data/test"})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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helloTar := filepath.Join(podmanTest.TempDir, "hello.tar")
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session = podmanTest.Podman([]string{"volume", "export", volName, "--output", helloTar})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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session = podmanTest.Podman([]string{"volume", "create", "my_vol2"})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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session = podmanTest.Podman([]string{"volume", "import", "my_vol2", helloTar})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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Expect(session.OutputToString()).To(Equal(""), "output of volume import")
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session = podmanTest.Podman([]string{"run", "--volume", "my_vol2:/data", ALPINE, "cat", "/data/test"})
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session.WaitWithDefaultTimeout()
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Expect(session.OutputToString()).To(ContainSubstring("hello"))
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})
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It("podman import/export volume should fail", func() {
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// try import on volume or source which does not exists
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SkipIfRemote("Volume export check does not work with a remote client")
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session := podmanTest.Podman([]string{"volume", "import", "notfound", "notfound.tar"})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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Expect(session.ErrorToString()).To(ContainSubstring("open notfound.tar: no such file or directory"))
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session = podmanTest.Podman([]string{"volume", "import", "notfound", "-"})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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Expect(session.ErrorToString()).To(ContainSubstring("no such volume notfound"))
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session = podmanTest.Podman([]string{"volume", "export", "notfound"})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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Expect(session.ErrorToString()).To(ContainSubstring("no such volume notfound"))
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})
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It("podman create volume with bad volume option", func() {
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session := podmanTest.Podman([]string{"volume", "create", "--opt", "badOpt=bad"})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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})
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It("podman create volume with o=uid,gid", func() {
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volName := "testVol"
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uid := "3000"
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gid := "4000"
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session := podmanTest.Podman([]string{"volume", "create", "--opt", fmt.Sprintf("o=uid=%s,gid=%s", uid, gid), volName})
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session.WaitWithDefaultTimeout()
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Expect(session).Should(Exit(0))
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inspectUID := podmanTest.Podman([]string{"volume", "inspect", "--format", "{{ .UID }}", volName})
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inspectUID.WaitWithDefaultTimeout()
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Expect(inspectUID).Should(Exit(0))
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Expect(inspectUID.OutputToString()).To(Equal(uid))
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inspectGID := podmanTest.Podman([]string{"volume", "inspect", "--format", "{{ .GID }}", volName})
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inspectGID.WaitWithDefaultTimeout()
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Expect(inspectGID).Should(Exit(0))
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Expect(inspectGID.OutputToString()).To(Equal(gid))
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// options should contain `uid=3000,gid=4000:3000:4000`
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optionFormat := `{{ .Options.o }}:{{ .Options.UID }}:{{ .Options.GID }}`
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optionStrFormatExpect := fmt.Sprintf(`uid=%s,gid=%s:%s:%s`, uid, gid, uid, gid)
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inspectOpts := podmanTest.Podman([]string{"volume", "inspect", "--format", optionFormat, volName})
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inspectOpts.WaitWithDefaultTimeout()
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Expect(inspectOpts).Should(Exit(0))
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Expect(inspectOpts.OutputToString()).To(Equal(optionStrFormatExpect))
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})
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It("image-backed volume basic functionality", func() {
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podmanTest.AddImageToRWStore(fedoraMinimal)
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volName := "testvol"
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volCreate := podmanTest.Podman([]string{"volume", "create", "--driver", "image", "--opt", fmt.Sprintf("image=%s", fedoraMinimal), volName})
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volCreate.WaitWithDefaultTimeout()
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Expect(volCreate).Should(Exit(0))
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runCmd := podmanTest.Podman([]string{"run", "-v", fmt.Sprintf("%s:/test", volName), ALPINE, "cat", "/test/etc/redhat-release"})
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runCmd.WaitWithDefaultTimeout()
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Expect(runCmd).Should(Exit(0))
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Expect(runCmd.OutputToString()).To(ContainSubstring("Fedora"))
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rmCmd := podmanTest.Podman([]string{"rmi", "--force", fedoraMinimal})
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rmCmd.WaitWithDefaultTimeout()
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Expect(rmCmd).Should(Exit(0))
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psCmd := podmanTest.Podman([]string{"ps", "-aq"})
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psCmd.WaitWithDefaultTimeout()
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Expect(psCmd).Should(Exit(0))
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Expect(psCmd.OutputToString()).To(BeEmpty())
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volumesCmd := podmanTest.Podman([]string{"volume", "ls", "-q"})
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volumesCmd.WaitWithDefaultTimeout()
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Expect(volumesCmd).Should(Exit(0))
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Expect(volumesCmd.OutputToString()).To(Not(ContainSubstring(volName)))
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})
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It("image-backed volume force removal", func() {
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podmanTest.AddImageToRWStore(fedoraMinimal)
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volName := "testvol"
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volCreate := podmanTest.Podman([]string{"volume", "create", "--driver", "image", "--opt", fmt.Sprintf("image=%s", fedoraMinimal), volName})
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volCreate.WaitWithDefaultTimeout()
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Expect(volCreate).Should(Exit(0))
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runCmd := podmanTest.Podman([]string{"run", "-v", fmt.Sprintf("%s:/test", volName), ALPINE, "cat", "/test/etc/redhat-release"})
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runCmd.WaitWithDefaultTimeout()
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Expect(runCmd).Should(Exit(0))
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Expect(runCmd.OutputToString()).To(ContainSubstring("Fedora"))
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rmCmd := podmanTest.Podman([]string{"volume", "rm", "--force", volName})
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rmCmd.WaitWithDefaultTimeout()
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Expect(rmCmd).Should(Exit(0))
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psCmd := podmanTest.Podman([]string{"ps", "-aq"})
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psCmd.WaitWithDefaultTimeout()
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Expect(psCmd).Should(Exit(0))
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Expect(psCmd.OutputToString()).To(BeEmpty())
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volumesCmd := podmanTest.Podman([]string{"volume", "ls", "-q"})
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volumesCmd.WaitWithDefaultTimeout()
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Expect(volumesCmd).Should(Exit(0))
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Expect(volumesCmd.OutputToString()).To(Not(ContainSubstring(volName)))
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})
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})
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