mirror of
https://github.com/ceph/ceph-csi.git
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288 lines
9.7 KiB
Go
288 lines
9.7 KiB
Go
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/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package status
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import (
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"fmt"
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"strings"
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v1 "k8s.io/api/core/v1"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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runtimeutil "k8s.io/kubernetes/pkg/kubelet/kuberuntime/util"
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)
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const (
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// UnknownContainerStatuses says that all container statuses are unknown.
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UnknownContainerStatuses = "UnknownContainerStatuses"
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// PodCompleted says that all related containers have succeeded.
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PodCompleted = "PodCompleted"
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// PodFailed says that the pod has failed and as such the containers have failed.
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PodFailed = "PodFailed"
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// ContainersNotReady says that one or more containers are not ready.
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ContainersNotReady = "ContainersNotReady"
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// ContainersNotInitialized says that one or more init containers have not succeeded.
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ContainersNotInitialized = "ContainersNotInitialized"
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// ReadinessGatesNotReady says that one or more pod readiness gates are not ready.
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ReadinessGatesNotReady = "ReadinessGatesNotReady"
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)
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// GenerateContainersReadyCondition returns the status of "ContainersReady" condition.
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// The status of "ContainersReady" condition is true when all containers are ready.
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func GenerateContainersReadyCondition(spec *v1.PodSpec, containerStatuses []v1.ContainerStatus, podPhase v1.PodPhase) v1.PodCondition {
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// Find if all containers are ready or not.
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if containerStatuses == nil {
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return v1.PodCondition{
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Type: v1.ContainersReady,
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Status: v1.ConditionFalse,
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Reason: UnknownContainerStatuses,
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}
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}
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unknownContainers := []string{}
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unreadyContainers := []string{}
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for _, container := range spec.InitContainers {
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if !podutil.IsRestartableInitContainer(&container) {
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continue
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}
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if containerStatus, ok := podutil.GetContainerStatus(containerStatuses, container.Name); ok {
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if !containerStatus.Ready {
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unreadyContainers = append(unreadyContainers, container.Name)
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}
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} else {
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unknownContainers = append(unknownContainers, container.Name)
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}
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}
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for _, container := range spec.Containers {
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if containerStatus, ok := podutil.GetContainerStatus(containerStatuses, container.Name); ok {
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if !containerStatus.Ready {
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unreadyContainers = append(unreadyContainers, container.Name)
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}
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} else {
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unknownContainers = append(unknownContainers, container.Name)
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}
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}
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// If all containers are known and succeeded, just return PodCompleted.
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if podPhase == v1.PodSucceeded && len(unknownContainers) == 0 {
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return generateContainersReadyConditionForTerminalPhase(podPhase)
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}
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// If the pod phase is failed, explicitly set the ready condition to false for containers since they may be in progress of terminating.
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if podPhase == v1.PodFailed {
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return generateContainersReadyConditionForTerminalPhase(podPhase)
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}
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// Generate message for containers in unknown condition.
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unreadyMessages := []string{}
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if len(unknownContainers) > 0 {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("containers with unknown status: %s", unknownContainers))
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}
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if len(unreadyContainers) > 0 {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("containers with unready status: %s", unreadyContainers))
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}
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unreadyMessage := strings.Join(unreadyMessages, ", ")
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if unreadyMessage != "" {
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return v1.PodCondition{
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Type: v1.ContainersReady,
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Status: v1.ConditionFalse,
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Reason: ContainersNotReady,
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Message: unreadyMessage,
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}
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}
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return v1.PodCondition{
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Type: v1.ContainersReady,
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Status: v1.ConditionTrue,
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}
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}
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// GeneratePodReadyCondition returns "Ready" condition of a pod.
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// The status of "Ready" condition is "True", if all containers in a pod are ready
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// AND all matching conditions specified in the ReadinessGates have status equal to "True".
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func GeneratePodReadyCondition(spec *v1.PodSpec, conditions []v1.PodCondition, containerStatuses []v1.ContainerStatus, podPhase v1.PodPhase) v1.PodCondition {
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containersReady := GenerateContainersReadyCondition(spec, containerStatuses, podPhase)
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// If the status of ContainersReady is not True, return the same status, reason and message as ContainersReady.
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if containersReady.Status != v1.ConditionTrue {
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return v1.PodCondition{
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Type: v1.PodReady,
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Status: containersReady.Status,
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Reason: containersReady.Reason,
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Message: containersReady.Message,
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}
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}
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// Evaluate corresponding conditions specified in readiness gate
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// Generate message if any readiness gate is not satisfied.
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unreadyMessages := []string{}
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for _, rg := range spec.ReadinessGates {
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_, c := podutil.GetPodConditionFromList(conditions, rg.ConditionType)
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if c == nil {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("corresponding condition of pod readiness gate %q does not exist.", string(rg.ConditionType)))
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} else if c.Status != v1.ConditionTrue {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("the status of pod readiness gate %q is not \"True\", but %v", string(rg.ConditionType), c.Status))
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}
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}
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// Set "Ready" condition to "False" if any readiness gate is not ready.
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if len(unreadyMessages) != 0 {
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unreadyMessage := strings.Join(unreadyMessages, ", ")
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return v1.PodCondition{
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Type: v1.PodReady,
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Status: v1.ConditionFalse,
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Reason: ReadinessGatesNotReady,
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Message: unreadyMessage,
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}
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}
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return v1.PodCondition{
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Type: v1.PodReady,
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Status: v1.ConditionTrue,
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}
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}
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func isInitContainerInitialized(initContainer *v1.Container, containerStatus *v1.ContainerStatus) bool {
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if podutil.IsRestartableInitContainer(initContainer) {
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if containerStatus.Started == nil || !*containerStatus.Started {
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return false
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}
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} else { // regular init container
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if !containerStatus.Ready {
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return false
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}
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}
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return true
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}
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// GeneratePodInitializedCondition returns initialized condition if all init containers in a pod are ready, else it
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// returns an uninitialized condition.
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func GeneratePodInitializedCondition(spec *v1.PodSpec, containerStatuses []v1.ContainerStatus, podPhase v1.PodPhase) v1.PodCondition {
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// Find if all containers are ready or not.
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if containerStatuses == nil && len(spec.InitContainers) > 0 {
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return v1.PodCondition{
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Type: v1.PodInitialized,
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Status: v1.ConditionFalse,
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Reason: UnknownContainerStatuses,
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}
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}
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unknownContainers := []string{}
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incompleteContainers := []string{}
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for _, container := range spec.InitContainers {
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containerStatus, ok := podutil.GetContainerStatus(containerStatuses, container.Name)
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if !ok {
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unknownContainers = append(unknownContainers, container.Name)
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continue
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}
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if !isInitContainerInitialized(&container, &containerStatus) {
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incompleteContainers = append(incompleteContainers, container.Name)
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}
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}
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// If all init containers are known and succeeded, just return PodCompleted.
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if podPhase == v1.PodSucceeded && len(unknownContainers) == 0 {
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return v1.PodCondition{
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Type: v1.PodInitialized,
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Status: v1.ConditionTrue,
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Reason: PodCompleted,
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}
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}
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// If there is any regular container that has started, then the pod has
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// been initialized before.
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// This is needed to handle the case where the pod has been initialized but
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// the restartable init containers are restarting.
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if kubecontainer.HasAnyRegularContainerStarted(spec, containerStatuses) {
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return v1.PodCondition{
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Type: v1.PodInitialized,
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Status: v1.ConditionTrue,
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}
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}
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unreadyMessages := make([]string, 0, len(unknownContainers)+len(incompleteContainers))
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if len(unknownContainers) > 0 {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("containers with unknown status: %s", unknownContainers))
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}
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if len(incompleteContainers) > 0 {
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unreadyMessages = append(unreadyMessages, fmt.Sprintf("containers with incomplete status: %s", incompleteContainers))
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}
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unreadyMessage := strings.Join(unreadyMessages, ", ")
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if unreadyMessage != "" {
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return v1.PodCondition{
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Type: v1.PodInitialized,
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Status: v1.ConditionFalse,
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Reason: ContainersNotInitialized,
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Message: unreadyMessage,
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}
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}
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return v1.PodCondition{
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Type: v1.PodInitialized,
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Status: v1.ConditionTrue,
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}
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}
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func GeneratePodReadyToStartContainersCondition(pod *v1.Pod, podStatus *kubecontainer.PodStatus) v1.PodCondition {
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newSandboxNeeded, _, _ := runtimeutil.PodSandboxChanged(pod, podStatus)
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// if a new sandbox does not need to be created for a pod, it indicates that
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// a sandbox for the pod with networking configured already exists.
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// Otherwise, the kubelet needs to invoke the container runtime to create a
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// fresh sandbox and configure networking for the sandbox.
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if !newSandboxNeeded {
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return v1.PodCondition{
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Type: v1.PodReadyToStartContainers,
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Status: v1.ConditionTrue,
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}
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}
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return v1.PodCondition{
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Type: v1.PodReadyToStartContainers,
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Status: v1.ConditionFalse,
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}
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}
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func generateContainersReadyConditionForTerminalPhase(podPhase v1.PodPhase) v1.PodCondition {
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condition := v1.PodCondition{
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Type: v1.ContainersReady,
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Status: v1.ConditionFalse,
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}
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if podPhase == v1.PodFailed {
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condition.Reason = PodFailed
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} else if podPhase == v1.PodSucceeded {
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condition.Reason = PodCompleted
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}
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return condition
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}
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func generatePodReadyConditionForTerminalPhase(podPhase v1.PodPhase) v1.PodCondition {
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condition := v1.PodCondition{
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Type: v1.PodReady,
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Status: v1.ConditionFalse,
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}
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if podPhase == v1.PodFailed {
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condition.Reason = PodFailed
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} else if podPhase == v1.PodSucceeded {
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condition.Reason = PodCompleted
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}
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return condition
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}
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