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Add emptyDir volume support to kube play

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When a kube yaml has a volume set as empty dir, podman
will create an anonymous volume with the empty dir name and
attach it to the containers running in the pod. When the pod
is removed, the empy dir volume created is also removed.

Add tests and docs for this as well.

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>
This commit is contained in:
Urvashi Mohnani
2022-07-24 19:44:41 -04:00
parent 57441b4c71
commit 98169c20dd
11 changed files with 98 additions and 15 deletions
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51
test/e2e/play_kube_test.go
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@@ -509,6 +509,9 @@ spec:
volumes:
{{ range . }}
- name: {{ .Name }}
{{- if (eq .VolumeType "EmptyDir") }}
emptyDir: {}
{{- end }}
{{- if (eq .VolumeType "HostPath") }}
hostPath:
path: {{ .HostPath.Path }}
@@ -1242,12 +1245,15 @@ type ConfigMap struct {
Optional bool
}
type EmptyDir struct{}
type Volume struct {
VolumeType string
Name string
HostPath
PersistentVolumeClaim
ConfigMap
EmptyDir
}
// getHostPathVolume takes a type and a location for a HostPath
@@ -1289,6 +1295,14 @@ func getConfigMapVolume(vName string, items []map[string]string, optional bool)
}
}
func getEmptyDirVolume() *Volume {
return &Volume{
VolumeType: "EmptyDir",
Name: defaultVolName,
EmptyDir: EmptyDir{},
}
}
type Env struct {
Name string
Value string
@@ -2762,6 +2776,43 @@ VOLUME %s`, ALPINE, hostPathDir+"/")
Expect(kube).Should(Exit(0))
})
It("podman play kube with emptyDir volume", func() {
podName := "test-pod"
ctrName1 := "vol-test-ctr"
ctrName2 := "vol-test-ctr-2"
ctr1 := getCtr(withVolumeMount("/test-emptydir", false), withImage(BB), withName(ctrName1))
ctr2 := getCtr(withVolumeMount("/test-emptydir-2", false), withImage(BB), withName(ctrName2))
pod := getPod(withPodName(podName), withVolume(getEmptyDirVolume()), withCtr(ctr1), withCtr(ctr2))
err = generateKubeYaml("pod", pod, kubeYaml)
Expect(err).To(BeNil())
kube := podmanTest.Podman([]string{"play", "kube", kubeYaml})
kube.WaitWithDefaultTimeout()
Expect(kube).Should(Exit(0))
emptyDirCheck1 := podmanTest.Podman([]string{"exec", podName + "-" + ctrName1, "ls", "/test-emptydir"})
emptyDirCheck1.WaitWithDefaultTimeout()
Expect(emptyDirCheck1).Should(Exit(0))
emptyDirCheck2 := podmanTest.Podman([]string{"exec", podName + "-" + ctrName2, "ls", "/test-emptydir-2"})
emptyDirCheck2.WaitWithDefaultTimeout()
Expect(emptyDirCheck2).Should(Exit(0))
volList1 := podmanTest.Podman([]string{"volume", "ls", "-q"})
volList1.WaitWithDefaultTimeout()
Expect(volList1).Should(Exit(0))
Expect(volList1.OutputToString()).To(Equal(defaultVolName))
remove := podmanTest.Podman([]string{"pod", "rm", "-f", podName})
remove.WaitWithDefaultTimeout()
Expect(remove).Should(Exit(0))
volList2 := podmanTest.Podman([]string{"volume", "ls", "-q"})
volList2.WaitWithDefaultTimeout()
Expect(volList2).Should(Exit(0))
Expect(volList2.OutputToString()).To(Equal(""))
})
It("podman play kube applies labels to pods", func() {
var numReplicas int32 = 5
expectedLabelKey := "key1"