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Move deployment status-checking logic to library package
Signed-off-by: Andrew Obuchowicz <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| // | ||
| // Copyright (c) 2019-2022 Red Hat, Inc. | ||
| // 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 check | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| dw "github.com/devfile/api/v2/pkg/apis/workspaces/v1alpha2" | ||
| "github.com/devfile/devworkspace-operator/pkg/common" | ||
| "github.com/devfile/devworkspace-operator/pkg/config" | ||
| "github.com/devfile/devworkspace-operator/pkg/infrastructure" | ||
| "github.com/devfile/devworkspace-operator/pkg/provision/sync" | ||
| appsv1 "k8s.io/api/apps/v1" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/fields" | ||
| k8sclient "sigs.k8s.io/controller-runtime/pkg/client" | ||
| runtimeClient "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
|
||
| var containerFailureStateReasons = []string{ | ||
| "CrashLoopBackOff", | ||
| "ImagePullBackOff", | ||
| "CreateContainerError", | ||
| "RunContainerError", | ||
| } | ||
|
|
||
| // unrecoverablePodEventReasons contains Kubernetes events that should fail workspace startup | ||
| // if they occur related to a workspace pod. Events are stored as a map with event names as keys | ||
| // and values representing the threshold of how many times we can see an event before it is considered | ||
| // unrecoverable. | ||
| var unrecoverablePodEventReasons = map[string]int32{ | ||
| "FailedPostStartHook": 1, | ||
| "FailedMount": 3, | ||
| "FailedScheduling": 1, | ||
| "FailedCreate": 1, | ||
| "ReplicaSetCreateError": 1, | ||
| } | ||
|
|
||
| var unrecoverableDeploymentConditionReasons = []string{ | ||
| "FailedCreate", | ||
| } | ||
|
|
||
| func CheckDeploymentStatus(deployment *appsv1.Deployment) (ready bool) { | ||
| return deployment.Status.ReadyReplicas > 0 | ||
| } | ||
|
|
||
| func CheckDeploymentConditions(deployment *appsv1.Deployment) (healthy bool, errorMsg string) { | ||
| conditions := deployment.Status.Conditions | ||
| for _, condition := range conditions { | ||
| for _, unrecoverableReason := range unrecoverableDeploymentConditionReasons { | ||
| if condition.Reason == unrecoverableReason { | ||
| return false, fmt.Sprintf("Detected unrecoverable deployment condition: %s %s", condition.Reason, condition.Message) | ||
| } | ||
| } | ||
| } | ||
| return true, "" | ||
| } | ||
|
|
||
| // checkPodsState checks if workspace-related pods are in an unrecoverable state. A pod is considered to be unrecoverable | ||
| // if it has a container with one of the containerFailureStateReasons states, or if an unrecoverable event (with reason | ||
| // matching unrecoverablePodEventReasons) has the pod as the involved object. | ||
| // Returns optional message with detected unrecoverable state details | ||
| // error if any happens during check | ||
| func CheckPodsState(workspace *dw.DevWorkspace, namespace string, labelSelector k8sclient.MatchingLabels, | ||
| clusterAPI sync.ClusterAPI) (stateMsg string, checkFailure error) { | ||
| podList, err := GetPods(namespace, labelSelector, clusterAPI.Client) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| for _, pod := range podList.Items { | ||
| for _, containerStatus := range pod.Status.ContainerStatuses { | ||
| if !CheckContainerStatusForFailure(&containerStatus) { | ||
| return fmt.Sprintf("Container %s has state %s", containerStatus.Name, containerStatus.State.Waiting.Reason), nil | ||
| } | ||
| } | ||
| for _, initContainerStatus := range pod.Status.InitContainerStatuses { | ||
| if !CheckContainerStatusForFailure(&initContainerStatus) { | ||
| return fmt.Sprintf("Init Container %s has state %s", initContainerStatus.Name, initContainerStatus.State.Waiting.Reason), nil | ||
| } | ||
| } | ||
| if msg, err := CheckPodEvents(&pod, workspace.Status.DevWorkspaceId, clusterAPI); err != nil || msg != "" { | ||
| return msg, err | ||
| } | ||
| } | ||
| return "", nil | ||
| } | ||
|
|
||
| func CheckPodEvents(pod *corev1.Pod, workspaceID string, clusterAPI sync.ClusterAPI) (msg string, err error) { | ||
| evs := &corev1.EventList{} | ||
| selector, err := fields.ParseSelector(fmt.Sprintf("involvedObject.name=%s", pod.Name)) | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to parse field selector: %s", err) | ||
| } | ||
| if err := clusterAPI.Client.List(clusterAPI.Ctx, evs, k8sclient.InNamespace(pod.Namespace), k8sclient.MatchingFieldsSelector{Selector: selector}); err != nil { | ||
| return "", fmt.Errorf("failed to list events in namespace %s: %w", pod.Namespace, err) | ||
| } | ||
| for _, ev := range evs.Items { | ||
| if ev.InvolvedObject.Kind != "Pod" { | ||
| continue | ||
| } | ||
|
|
||
| // On OpenShift, it's possible see "FailedMount" events when using a routingClass that depends on the service-ca | ||
| // operator. To avoid this, we always ignore FailedMount events if the message refers to the DWO-provisioned volume | ||
| if infrastructure.IsOpenShift() && | ||
| ev.Reason == "FailedMount" && | ||
| strings.Contains(ev.Message, common.ServingCertVolumeName(common.ServiceName(workspaceID))) { | ||
| continue | ||
| } | ||
|
|
||
| if maxCount, isUnrecoverableEvent := unrecoverablePodEventReasons[ev.Reason]; isUnrecoverableEvent { | ||
| if !checkIfUnrecoverableEventIgnored(ev.Reason) && ev.Count >= maxCount { | ||
| var msg string | ||
| if ev.Count > 1 { | ||
| msg = fmt.Sprintf("Detected unrecoverable event %s %d times: %s.", ev.Reason, ev.Count, ev.Message) | ||
| } else { | ||
| msg = fmt.Sprintf("Detected unrecoverable event %s: %s.", ev.Reason, ev.Message) | ||
| } | ||
| return msg, nil | ||
| } | ||
| } | ||
| } | ||
| return "", nil | ||
| } | ||
|
|
||
| func CheckContainerStatusForFailure(containerStatus *corev1.ContainerStatus) (ok bool) { | ||
| if containerStatus.State.Waiting != nil { | ||
| for _, failureReason := range containerFailureStateReasons { | ||
| if containerStatus.State.Waiting.Reason == failureReason { | ||
| return checkIfUnrecoverableEventIgnored(containerStatus.State.Waiting.Reason) | ||
| } | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| // TODO: Remove this function? | ||
| func GetPods(namespace string, labelSelector k8sclient.MatchingLabels, client runtimeClient.Client) (*corev1.PodList, error) { | ||
| pods := &corev1.PodList{} | ||
| if err := client.List(context.TODO(), pods, k8sclient.InNamespace(namespace), labelSelector); err != nil { | ||
| return nil, err | ||
| } | ||
| return pods, nil | ||
| } | ||
|
|
||
| func checkIfUnrecoverableEventIgnored(reason string) (ignored bool) { | ||
| for _, ignoredReason := range config.Workspace.IgnoredUnrecoverableEvents { | ||
| if ignoredReason == reason { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } |
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