aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorOpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com>2020-09-21 12:06:46 +0000
committerGitHub <noreply@github.com>2020-09-21 12:06:46 +0000
commitdd4dc4b002e79c28cd824c59d8f6537d347868cf (patch)
tree938e1da3637fb32ef81b8be782f85792951b5cdb
parent852943516606f32ccc2406f41bcf3df42d7c622c (diff)
parent44d7270a34a0c3578d00858440f2adb53b83ef5e (diff)
downloadpodman-dd4dc4b002e79c28cd824c59d8f6537d347868cf.tar.gz
podman-dd4dc4b002e79c28cd824c59d8f6537d347868cf.tar.bz2
podman-dd4dc4b002e79c28cd824c59d8f6537d347868cf.zip
Merge pull request #7702 from Luap99/fix#7701
Fix incorrect parsing of create/run --volumes-from
-rw-r--r--cmd/podman/common/create.go2
-rw-r--r--docs/source/markdown/podman-create.1.md13
-rw-r--r--docs/source/markdown/podman-run.1.md14
-rw-r--r--pkg/specgen/generate/storage.go4
-rw-r--r--test/e2e/run_test.go70
5 files changed, 84 insertions, 19 deletions
diff --git a/cmd/podman/common/create.go b/cmd/podman/common/create.go
index cfbcf6140..7e3dc7fb4 100644
--- a/cmd/podman/common/create.go
+++ b/cmd/podman/common/create.go
@@ -509,7 +509,7 @@ func GetCreateFlags(cf *ContainerCLIOpts) *pflag.FlagSet {
"volume", "v", containerConfig.Volumes(),
"Bind mount a volume into the container",
)
- createFlags.StringSliceVar(
+ createFlags.StringArrayVar(
&cf.VolumesFrom,
"volumes-from", []string{},
"Mount volumes from the specified container(s)",
diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md
index 9049ffb9f..4a8b311f0 100644
--- a/docs/source/markdown/podman-create.1.md
+++ b/docs/source/markdown/podman-create.1.md
@@ -1070,11 +1070,11 @@ change propagation properties of source mount. Say `/` is source mount for
**--volumes-from**[=*CONTAINER*[:*OPTIONS*]]
-Mount volumes from the specified container(s).
-*OPTIONS* is a comma delimited list with the following available elements:
+Mount volumes from the specified container(s). Used to share volumes between
+containers. The *options* is a comma delimited list with the following available elements:
-* [rw|ro]
-* z
+* **rw**|**ro**
+* **z**
Mounts already mounted volumes from a source container onto another
container. You must supply the source's container-id or container-name.
@@ -1083,9 +1083,8 @@ the target container. You can share volumes even if the source container
is not running.
By default, Podman mounts the volumes in the same mode (read-write or
-read-only) as it is mounted in the source container. Optionally, you
-can change this by suffixing the container-id with either the `ro` or
-`rw` keyword.
+read-only) as it is mounted in the source container.
+You can change this by adding a `ro` or `rw` _option_.
Labeling systems like SELinux require that proper labels are placed on volume
content mounted into a container. Without a label, the security system might
diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md
index 1a7b36a5e..47aa8827f 100644
--- a/docs/source/markdown/podman-run.1.md
+++ b/docs/source/markdown/podman-run.1.md
@@ -1100,7 +1100,7 @@ will convert /foo into a shared mount point. Alternatively, one can directly
change propagation properties of source mount. Say, if _/_ is source mount for
_/foo_, then use **mount --make-shared /** to convert _/_ into a shared mount.
-**--volumes-from**[=*container-id*[:*options*]]
+**--volumes-from**[=*CONTAINER*[:*OPTIONS*]]
Mount volumes from the specified container(s). Used to share volumes between
containers. The *options* is a comma delimited list with the following available elements:
@@ -1108,19 +1108,23 @@ containers. The *options* is a comma delimited list with the following available
* **rw**|**ro**
* **z**
-You can share volumes even if the source container is not running.
+Mounts already mounted volumes from a source container onto another
+container. You must supply the source's container-id or container-name.
+To share a volume, use the --volumes-from option when running
+the target container. You can share volumes even if the source container
+is not running.
By default, Podman mounts the volumes in the same mode (read-write or
read-only) as it is mounted in the source container.
-You can change this by adding a **ro** or **rw** _option_.
+You can change this by adding a `ro` or `rw` _option_.
Labeling systems like SELinux require that proper labels are placed on volume
content mounted into a container. Without a label, the security system might
prevent the processes running inside the container from using the content. By
default, Podman does not change the labels set by the OS.
-To change a label in the container context, you can add **z** to the volume mount.
-This suffix tells Podman to relabel file objects on the shared volumes. The **z**
+To change a label in the container context, you can add `z` to the volume mount.
+This suffix tells Podman to relabel file objects on the shared volumes. The `z`
option tells Podman that two containers share the volume content. As a result,
podman labels the content with a shared content label. Shared volume labels allow
all containers to read/write content.
diff --git a/pkg/specgen/generate/storage.go b/pkg/specgen/generate/storage.go
index 7f55317ff..b225f79ee 100644
--- a/pkg/specgen/generate/storage.go
+++ b/pkg/specgen/generate/storage.go
@@ -195,9 +195,9 @@ func getVolumesFrom(volumesFrom []string, runtime *libpod.Runtime) (map[string]s
splitVol := strings.SplitN(volume, ":", 2)
if len(splitVol) == 2 {
splitOpts := strings.Split(splitVol[1], ",")
+ setRORW := false
+ setZ := false
for _, opt := range splitOpts {
- setRORW := false
- setZ := false
switch opt {
case "z":
if setZ {
diff --git a/test/e2e/run_test.go b/test/e2e/run_test.go
index cbfb6bf59..4376bf309 100644
--- a/test/e2e/run_test.go
+++ b/test/e2e/run_test.go
@@ -733,23 +733,85 @@ USER mail`
err := os.MkdirAll(vol, 0755)
Expect(err).To(BeNil())
- volFile := filepath.Join(vol, "test.txt")
+ filename := "test.txt"
+ volFile := filepath.Join(vol, filename)
data := "Testing --volumes-from!!!"
err = ioutil.WriteFile(volFile, []byte(data), 0755)
Expect(err).To(BeNil())
+ mountpoint := "/myvol/"
- session := podmanTest.Podman([]string{"create", "--volume", vol + ":/myvol", redis, "sh"})
+ session := podmanTest.Podman([]string{"create", "--volume", vol + ":" + mountpoint, ALPINE, "cat", mountpoint + filename})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
ctrID := session.OutputToString()
- session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID, ALPINE, "echo", "'testing read-write!' >> myvol/test.txt"})
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID, ALPINE, "cat", mountpoint + filename})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
+ Expect(session.OutputToString()).To(Equal(data))
- session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID + ":z", ALPINE, "ls"})
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID, ALPINE, "sh", "-c", "echo test >> " + mountpoint + filename})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
+
+ session = podmanTest.Podman([]string{"start", "--attach", ctrID})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+ Expect(session.OutputToString()).To(Equal(data + "test"))
+ })
+
+ It("podman run --volumes-from flag options", func() {
+ vol := filepath.Join(podmanTest.TempDir, "vol-test")
+ err := os.MkdirAll(vol, 0755)
+ Expect(err).To(BeNil())
+
+ filename := "test.txt"
+ volFile := filepath.Join(vol, filename)
+ data := "Testing --volumes-from!!!"
+ err = ioutil.WriteFile(volFile, []byte(data), 0755)
+ Expect(err).To(BeNil())
+ mountpoint := "/myvol/"
+
+ session := podmanTest.Podman([]string{"create", "--volume", vol + ":" + mountpoint, ALPINE, "cat", mountpoint + filename})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+ ctrID := session.OutputToString()
+
+ // check that the read only option works
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID + ":ro", ALPINE, "touch", mountpoint + "abc.txt"})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(1))
+ Expect(session.ErrorToString()).To(ContainSubstring("Read-only file system"))
+
+ // check that both z and ro options work
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID + ":ro,z", ALPINE, "cat", mountpoint + filename})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+ Expect(session.OutputToString()).To(Equal(data))
+
+ // check that multiple ro/rw are not working
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID + ":ro,rw", ALPINE, "cat", mountpoint + filename})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(125))
+ Expect(session.ErrorToString()).To(ContainSubstring("cannot set ro or rw options more than once"))
+
+ // check that multiple z options are not working
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID + ":z,z,ro", ALPINE, "cat", mountpoint + filename})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(125))
+ Expect(session.ErrorToString()).To(ContainSubstring("cannot set :z more than once in mount options"))
+
+ // create new read only volume
+ session = podmanTest.Podman([]string{"create", "--volume", vol + ":" + mountpoint + ":ro", ALPINE, "cat", mountpoint + filename})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(0))
+ ctrID = session.OutputToString()
+
+ // check if the original volume was mounted as read only that --volumes-from also mount it as read only
+ session = podmanTest.Podman([]string{"run", "--volumes-from", ctrID, ALPINE, "touch", mountpoint + "abc.txt"})
+ session.WaitWithDefaultTimeout()
+ Expect(session.ExitCode()).To(Equal(1))
+ Expect(session.ErrorToString()).To(ContainSubstring("Read-only file system"))
})
It("podman run --volumes-from flag with built-in volumes", func() {