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Add Kubernetes cluster validation (kubernetes-sigs#679)
* Implement validate kube cluster objects * Add validate kube cluster in validate cluster command * Pass namespace and add more conditions to fail validate pods * Add header to validate pods file * Refactor validate pods to write test easier * Add unit test for validate pods * Remove cluster name from validate pods in validate command handler * Update bazel file for cluster validation * Refactor to collect pod failures and fail at the end * Remove unecessary prints and pass kube-system with metav1 * Print all pod failures when found * Cleanup and remove unnecessary test * Add test to cover looping functionality with N pods * Add validate components into the validation workflow
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| Copyright 2019 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package validation | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "strings" | ||
|
|
||
| corev1 "k8s.io/api/core/v1" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
|
||
| type validationError struct { | ||
| name string | ||
| message string | ||
| } | ||
|
|
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| func ValidatePods(ctx context.Context, w io.Writer, c client.Client, namespace string) error { | ||
| fmt.Fprintf(w, "Validating pods in namespace %q\n", namespace) | ||
|
|
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| pods, err := getPods(ctx, c, namespace) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if err := validatePods(w, pods, namespace); err != nil { | ||
| return err | ||
| } | ||
|
|
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| components, err := getComponents(ctx, c) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return validateComponents(w, components) | ||
| } | ||
|
|
||
| func getPods(ctx context.Context, c client.Client, namespace string) (*corev1.PodList, error) { | ||
| pods := &corev1.PodList{} | ||
| if err := c.List(ctx, client.InNamespace(namespace), pods); err != nil { | ||
| return nil, fmt.Errorf("failed to get pods in namespace %q: %v", namespace, err) | ||
| } | ||
| return pods, nil | ||
| } | ||
|
|
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| func validatePods(w io.Writer, pods *corev1.PodList, namespace string) error { | ||
| if len(pods.Items) == 0 { | ||
| fmt.Fprintf(w, "FAIL\n") | ||
| fmt.Fprintf(w, "\tpods in namespace %q not exist.\n", namespace) | ||
| return fmt.Errorf("pods in namespace %q not exist", namespace) | ||
| } | ||
|
|
||
| var failures []*validationError | ||
| for _, pod := range pods.Items { | ||
| if pod.Status.Phase == corev1.PodSucceeded { | ||
| continue | ||
| } | ||
|
|
||
| if pod.Status.Phase == corev1.PodPending || | ||
| pod.Status.Phase == corev1.PodFailed || | ||
| pod.Status.Phase == corev1.PodUnknown { | ||
| failures = append(failures, &validationError{ | ||
| name: fmt.Sprintf("%q/%q", pod.Namespace, pod.Name), | ||
| message: fmt.Sprintf("Pod %q in namespace %q is %s.", pod.Name, pod.Namespace, pod.Status.Phase), | ||
| }) | ||
| continue | ||
| } | ||
|
|
||
| var notready []string | ||
| for _, container := range pod.Status.ContainerStatuses { | ||
| if !container.Ready { | ||
| notready = append(notready, container.Name) | ||
| } | ||
| } | ||
| if len(notready) != 0 { | ||
| failures = append(failures, &validationError{ | ||
| name: fmt.Sprintf("%q/%q", pod.Namespace, pod.Name), | ||
| message: fmt.Sprintf("Pod %q in namespace %q is not ready (%s).", pod.Name, pod.Namespace, strings.Join(notready, ",")), | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| if len(failures) != 0 { | ||
| fmt.Fprintf(w, "FAIL\n") | ||
| for _, failure := range failures { | ||
| fmt.Fprintf(w, "\t[%v]: %s\n", failure.name, failure.message) | ||
| } | ||
| return fmt.Errorf("pod failures in namespace %q found", namespace) | ||
| } | ||
|
|
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| fmt.Fprintf(w, "PASS\n") | ||
| return nil | ||
| } | ||
|
|
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| func getComponents(ctx context.Context, c client.Client) (*corev1.ComponentStatusList, error) { | ||
| components := &corev1.ComponentStatusList{} | ||
| if err := c.List(ctx, &client.ListOptions{}, components); err != nil { | ||
| return nil, err | ||
| } | ||
| return components, nil | ||
| } | ||
|
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| func validateComponents(w io.Writer, components *corev1.ComponentStatusList) error { | ||
| if len(components.Items) == 0 { | ||
| fmt.Fprintf(w, "FAIL\n") | ||
| fmt.Fprintf(w, "\tcomponents not exist.\n") | ||
| return fmt.Errorf("components not exist") | ||
| } | ||
|
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| var failures []*validationError | ||
| for _, component := range components.Items { | ||
| for _, condition := range component.Conditions { | ||
| if condition.Status != corev1.ConditionTrue { | ||
| failures = append(failures, &validationError{ | ||
| name: fmt.Sprintf("%q", component.Name), | ||
| message: fmt.Sprintf("Component %q is not healthy", component.Name), | ||
| }) | ||
| } | ||
| } | ||
| } | ||
|
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| if len(failures) != 0 { | ||
| fmt.Fprintf(w, "FAIL\n") | ||
| for _, failure := range failures { | ||
| fmt.Fprintf(w, "\t[%v]: %s\n", failure.name, failure.message) | ||
| } | ||
| return fmt.Errorf("component failures found") | ||
| } | ||
|
|
||
| fmt.Fprintf(w, "PASS\n") | ||
| return nil | ||
| } |
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