mirror of
https://github.com/containers/podman.git
synced 2025-10-18 03:33:32 +08:00
implement init containers in podman
this is the first pass at implementing init containers for podman pods. init containersare made popular by k8s as a way to run setup for pods before the pods standard containers run. unlike k8s, we support two styles of init containers: always and oneshot. always means the container stays in the pod and starts whenever a pod is started. this does not apply to pods restarting. oneshot means the container runs onetime when the pod starts and then is removed. Signed-off-by: Brent Baude <bbaude@redhat.com>
This commit is contained in:
Brent Baude
171
test/e2e/pod_initcontainers_test.go
Normal file
171
test/e2e/pod_initcontainers_test.go
Normal file
@ -0,0 +1,171 @@
|
||||
package integration
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"path/filepath"
|
||||
|
||||
"github.com/containers/podman/v3/libpod/define"
|
||||
. "github.com/containers/podman/v3/test/utils"
|
||||
. "github.com/onsi/ginkgo"
|
||||
. "github.com/onsi/gomega"
|
||||
. "github.com/onsi/gomega/gexec"
|
||||
)
|
||||
|
||||
var _ = Describe("Podman init containers", func() {
|
||||
var (
|
||||
tempdir string
|
||||
err error
|
||||
podmanTest *PodmanTestIntegration
|
||||
)
|
||||
|
||||
BeforeEach(func() {
|
||||
tempdir, err = CreateTempDirInTempDir()
|
||||
if err != nil {
|
||||
os.Exit(1)
|
||||
}
|
||||
podmanTest = PodmanTestCreate(tempdir)
|
||||
podmanTest.Setup()
|
||||
podmanTest.SeedImages()
|
||||
})
|
||||
|
||||
AfterEach(func() {
|
||||
podmanTest.Cleanup()
|
||||
f := CurrentGinkgoTestDescription()
|
||||
processTestResult(f)
|
||||
|
||||
})
|
||||
|
||||
It("podman create init container without --pod should fail", func() {
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "always", ALPINE, "top"})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(125))
|
||||
})
|
||||
|
||||
It("podman create init container with bad init type should fail", func() {
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "unknown", "--pod", "new:foobar", ALPINE, "top"})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(125))
|
||||
})
|
||||
|
||||
It("podman init containers should not degrade pod status", func() {
|
||||
// create a pod
|
||||
topPod := podmanTest.Podman([]string{"create", "-t", "--pod", "new:foobar", ALPINE, "top"})
|
||||
topPod.WaitWithDefaultTimeout()
|
||||
Expect(topPod).Should(Exit(0))
|
||||
// add an init container
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "always", "--pod", "foobar", ALPINE, "date"})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(0))
|
||||
// start a pod
|
||||
start := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
start.WaitWithDefaultTimeout()
|
||||
Expect(start).Should(Exit(0))
|
||||
|
||||
inspect := podmanTest.Podman([]string{"pod", "inspect", "foobar"})
|
||||
inspect.WaitWithDefaultTimeout()
|
||||
Expect(inspect).Should(Exit(0))
|
||||
data := inspect.InspectPodToJSON()
|
||||
Expect(data.State).To(Equal(define.PodStateRunning))
|
||||
})
|
||||
|
||||
It("podman create init container should fail in running pod", func() {
|
||||
// create a running pod
|
||||
topPod := podmanTest.Podman([]string{"run", "-dt", "--pod", "new:foobar", ALPINE, "top"})
|
||||
topPod.WaitWithDefaultTimeout()
|
||||
Expect(topPod).Should(Exit(0))
|
||||
// adding init-ctr to running pod should fail
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "always", "--pod", "foobar", ALPINE, "date"})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(125))
|
||||
})
|
||||
|
||||
It("podman make sure init container runs before pod containers", func() {
|
||||
filename := filepath.Join("/dev/shm", RandomString(12))
|
||||
content := RandomString(16)
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "always", "--pod", "new:foobar", ALPINE, "bin/sh", "-c", fmt.Sprintf("echo %s > %s", content, filename)})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(0))
|
||||
verify := podmanTest.Podman([]string{"create", "--pod", "foobar", "-t", ALPINE, "top"})
|
||||
verify.WaitWithDefaultTimeout()
|
||||
Expect(verify).Should(Exit(0))
|
||||
start := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
start.WaitWithDefaultTimeout()
|
||||
Expect(start).Should(Exit(0))
|
||||
checkLog := podmanTest.Podman([]string{"exec", "-it", verify.OutputToString(), "cat", filename})
|
||||
checkLog.WaitWithDefaultTimeout()
|
||||
Expect(checkLog).Should(Exit(0))
|
||||
Expect(checkLog.OutputToString()).To(Equal(content))
|
||||
})
|
||||
|
||||
It("podman make sure oneshot container is removed", func() {
|
||||
filename := filepath.Join("/dev/shm", RandomString(12))
|
||||
content := RandomString(16)
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "oneshot", "--pod", "new:foobar", ALPINE, "bin/sh", "-c", fmt.Sprintf("echo %s > %s", content, filename)})
|
||||
session.WaitWithDefaultTimeout()
|
||||
initContainerID := session.OutputToString()
|
||||
Expect(session).Should(Exit(0))
|
||||
verify := podmanTest.Podman([]string{"create", "--pod", "foobar", "-t", ALPINE, "top"})
|
||||
verify.WaitWithDefaultTimeout()
|
||||
Expect(verify).Should(Exit(0))
|
||||
start := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
start.WaitWithDefaultTimeout()
|
||||
Expect(start).Should(Exit(0))
|
||||
check := podmanTest.Podman([]string{"container", "exists", initContainerID})
|
||||
check.WaitWithDefaultTimeout()
|
||||
// Container was rm'd
|
||||
//Expect(check).Should(Exit(1))
|
||||
Expect(check.ExitCode()).To(Equal(1), "I dont understand why the other way does not work")
|
||||
// Lets double check with a stop and start
|
||||
stopPod := podmanTest.Podman([]string{"pod", "stop", "foobar"})
|
||||
stopPod.WaitWithDefaultTimeout()
|
||||
Expect(stopPod).Should(Exit(0))
|
||||
startPod := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
startPod.WaitWithDefaultTimeout()
|
||||
Expect(startPod).Should(Exit(0))
|
||||
|
||||
// Because no init was run, the file should not even exist
|
||||
doubleCheck := podmanTest.Podman([]string{"exec", "-it", verify.OutputToString(), "cat", filename})
|
||||
doubleCheck.WaitWithDefaultTimeout()
|
||||
Expect(doubleCheck).Should(Exit(1))
|
||||
|
||||
})
|
||||
|
||||
It("podman ensure always init containers always run", func() {
|
||||
filename := filepath.Join("/dev/shm", RandomString(12))
|
||||
|
||||
// Write the date to a file
|
||||
session := podmanTest.Podman([]string{"create", "--init-ctr", "always", "--pod", "new:foobar", ALPINE, "bin/sh", "-c", fmt.Sprintf("date > %s", filename)})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session).Should(Exit(0))
|
||||
verify := podmanTest.Podman([]string{"create", "--pod", "foobar", "-t", ALPINE, "top"})
|
||||
verify.WaitWithDefaultTimeout()
|
||||
Expect(verify).Should(Exit(0))
|
||||
start := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
start.WaitWithDefaultTimeout()
|
||||
Expect(start).Should(Exit(0))
|
||||
|
||||
// capture the date written
|
||||
checkLog := podmanTest.Podman([]string{"exec", "-it", verify.OutputToString(), "cat", filename})
|
||||
checkLog.WaitWithDefaultTimeout()
|
||||
firstResult := checkLog.OutputToString()
|
||||
Expect(checkLog).Should(Exit(0))
|
||||
|
||||
// Stop and start the pod
|
||||
stopPod := podmanTest.Podman([]string{"pod", "stop", "foobar"})
|
||||
stopPod.WaitWithDefaultTimeout()
|
||||
Expect(stopPod).Should(Exit(0))
|
||||
startPod := podmanTest.Podman([]string{"pod", "start", "foobar"})
|
||||
startPod.WaitWithDefaultTimeout()
|
||||
Expect(startPod).Should(Exit(0))
|
||||
|
||||
// Check the file again with exec
|
||||
secondCheckLog := podmanTest.Podman([]string{"exec", "-it", verify.OutputToString(), "cat", filename})
|
||||
secondCheckLog.WaitWithDefaultTimeout()
|
||||
Expect(secondCheckLog).Should(Exit(0))
|
||||
|
||||
// Dates should not match
|
||||
Expect(firstResult).ToNot(Equal(secondCheckLog.OutputToString()))
|
||||
})
|
||||
|
||||
})
|
||||
Reference in New Issue
Block a user