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node: device-plugins: e2e: Refactor parse log to return string and error

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Rather than only returning a string forcing us to log failure with
`framework.Fail`, we return a string and error to handle error cases
more conventionally. This enables us to use the `parseLog` function
inside `Eventually` and `Consistently` blocks, or in general to delegate
the error processing and enable better composability.

Signed-off-by: Swati Sehgal <swsehgal@redhat.com>
Co-authored-by: Francesco Romani <fromani@redhat.com>
This commit is contained in:
Swati Sehgal 2023-03-13 10:24:11 +05:30 committed by Francesco Romani
parent 8f15859afc
commit 0aa6a5726a
1 changed files with 21 additions and 13 deletions
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34
test/e2e_node/device_plugin_test.go
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@ -161,7 +161,8 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
deviceIDRE := "stub devices: (Dev-[0-9]+)"
devID1 := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")))
v1alphaPodResources, err = getV1alpha1NodeDevices(ctx)
@ -221,16 +222,18 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
deviceIDRE := "stub devices: (Dev-[0-9]+)"
devID1 := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")))
pod1, err := e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
pod1, err = e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
ensurePodContainerRestart(ctx, f, pod1.Name, pod1.Name)
ginkgo.By("Confirming that device assignment persists even after container restart")
devIDAfterRestart := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devIDAfterRestart, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
framework.ExpectEqual(devIDAfterRestart, devID1)
ginkgo.By("Restarting Kubelet")
@ -242,7 +245,8 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
ginkgo.By("Validating that assignment is kept")
ensurePodContainerRestart(ctx, f, pod1.Name, pod1.Name)
ginkgo.By("Confirming that after a kubelet restart, fake-device assignment is kept")
devIDRestart1 := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devIDRestart1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
framework.ExpectEqual(devIDRestart1, devID1)
})
@ -250,10 +254,12 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
deviceIDRE := "stub devices: (Dev-[0-9]+)"
devID1 := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")))
pod1, err := e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
pod1, err = e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
ginkgo.By("Restarting Kubelet")
@ -275,7 +281,8 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
ginkgo.By("Confirming that after a kubelet and pod restart, fake-device assignment is kept")
ensurePodContainerRestart(ctx, f, pod1.Name, pod1.Name)
devIDRestart1 := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
devIDRestart1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
framework.ExpectEqual(devIDRestart1, devID1)
ginkgo.By("Waiting for resource to become available on the local node after re-registration")
@ -290,7 +297,8 @@ func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
pod2 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
ginkgo.By("Checking that pod got a different fake device")
devID2 := parseLog(ctx, f, pod2.Name, pod2.Name, deviceIDRE)
devID2, err := parseLog(ctx, f, pod2.Name, pod2.Name, deviceIDRE)
framework.ExpectNoError(err, "getting logs for pod %q", pod2.Name)
gomega.Expect(devID1).To(gomega.Not(gomega.Equal(devID2)))
})
@ -342,18 +350,18 @@ func ensurePodContainerRestart(ctx context.Context, f *framework.Framework, podN
}
// parseLog returns the matching string for the specified regular expression parsed from the container logs.
func parseLog(ctx context.Context, f *framework.Framework, podName string, contName string, re string) string {
func parseLog(ctx context.Context, f *framework.Framework, podName string, contName string, re string) (string, error) {
logs, err := e2epod.GetPodLogs(ctx, f.ClientSet, f.Namespace.Name, podName, contName)
if err != nil {
framework.Failf("GetPodLogs for pod %q failed: %v", podName, err)
return "", err
}
framework.Logf("got pod logs: %v", logs)
regex := regexp.MustCompile(re)
matches := regex.FindStringSubmatch(logs)
if len(matches) < 2 {
return ""
return "", fmt.Errorf("unexpected match in logs: %q", logs)
}
return matches[1]
return matches[1], nil
}