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docker-inspect: Extend docker inspect to export image/container metadata related to graph driver

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Export image/container metadata stored in graph driver. Right now 3 fields
DeviceId, DeviceSize and DeviceName are being exported from devicemapper.
Other graph drivers can export fields as they see fit.

This data can be used to mount the thin device outside of docker and tools
can look into image/container and do some kind of inspection.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Vivek Goyal
2015-06-15 14:05:10 -04:00
parent 1157fcc4a4
commit 407a626be6
14 changed files with 353 additions and 205 deletions
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integration-cli/docker_cli_inspect_test.go
+67
View File
@@ -89,3 +89,70 @@ func (s *DockerSuite) TestInspectContainerFilterInt(c *check.C) {
c.Fatalf("Expected exitcode: %d for container: %s", exitCode, id)
}
}
func (s *DockerSuite) TestInspectImageGraphDriver(c *check.C) {
imageTest := "emptyfs"
name, err := inspectField(imageTest, "GraphDriver.Name")
c.Assert(err, check.IsNil)
if name != "devicemapper" && name != "overlay" && name != "vfs" && name != "zfs" && name != "btrfs" && name != "aufs" {
c.Fatalf("%v is not a valid graph driver name", name)
}
if name != "devicemapper" {
return
}
deviceId, err := inspectField(imageTest, "GraphDriver.Data.DeviceId")
c.Assert(err, check.IsNil)
_, err = strconv.Atoi(deviceId)
if err != nil {
c.Fatalf("failed to inspect DeviceId of the image: %s, %v", deviceId, err)
}
deviceSize, err := inspectField(imageTest, "GraphDriver.Data.DeviceSize")
c.Assert(err, check.IsNil)
_, err = strconv.ParseUint(deviceSize, 10, 64)
if err != nil {
c.Fatalf("failed to inspect DeviceSize of the image: %s, %v", deviceSize, err)
}
}
func (s *DockerSuite) TestInspectContainerGraphDriver(c *check.C) {
runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "true")
out, _, _, err := runCommandWithStdoutStderr(runCmd)
if err != nil {
c.Fatalf("failed to run container: %v, output: %q", err, out)
}
out = strings.TrimSpace(out)
name, err := inspectField(out, "GraphDriver.Name")
c.Assert(err, check.IsNil)
if name != "devicemapper" && name != "overlay" && name != "vfs" && name != "zfs" && name != "btrfs" && name != "aufs" {
c.Fatalf("%v is not a valid graph driver name", name)
}
if name != "devicemapper" {
return
}
deviceId, err := inspectField(out, "GraphDriver.Data.DeviceId")
c.Assert(err, check.IsNil)
_, err = strconv.Atoi(deviceId)
if err != nil {
c.Fatalf("failed to inspect DeviceId of the image: %s, %v", deviceId, err)
}
deviceSize, err := inspectField(out, "GraphDriver.Data.DeviceSize")
c.Assert(err, check.IsNil)
_, err = strconv.ParseUint(deviceSize, 10, 64)
if err != nil {
c.Fatalf("failed to inspect DeviceSize of the image: %s, %v", deviceSize, err)
}
}