mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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551eff63b8
Change all references to the container ID in pkg/kubelet/... to the strong type defined in pkg/kubelet/container: ContainerID The motivation for this change is to make the format of the ID unambiguous, specifically whether or not it includes the runtime prefix (e.g. "docker://").
107 lines
3.4 KiB
Go
107 lines
3.4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 container
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import (
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"hash/adler32"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/util"
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"k8s.io/kubernetes/third_party/golang/expansion"
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"github.com/golang/glog"
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)
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// HandlerRunner runs a lifecycle handler for a container.
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type HandlerRunner interface {
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Run(containerID ContainerID, pod *api.Pod, container *api.Container, handler *api.Handler) error
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}
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// RunContainerOptionsGenerator generates the options that necessary for
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// container runtime to run a container.
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type RunContainerOptionsGenerator interface {
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GenerateRunContainerOptions(pod *api.Pod, container *api.Container) (*RunContainerOptions, error)
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}
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// ShouldContainerBeRestarted checks whether a container needs to be restarted.
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// TODO(yifan): Think about how to refactor this.
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func ShouldContainerBeRestarted(container *api.Container, pod *api.Pod, podStatus *api.PodStatus) bool {
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podFullName := GetPodFullName(pod)
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// Get all dead container status.
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var resultStatus []*api.ContainerStatus
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for i, containerStatus := range podStatus.ContainerStatuses {
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if containerStatus.Name == container.Name && containerStatus.State.Terminated != nil {
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resultStatus = append(resultStatus, &podStatus.ContainerStatuses[i])
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}
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}
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// Check RestartPolicy for dead container.
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if len(resultStatus) > 0 {
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if pod.Spec.RestartPolicy == api.RestartPolicyNever {
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glog.V(4).Infof("Already ran container %q of pod %q, do nothing", container.Name, podFullName)
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return false
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}
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if pod.Spec.RestartPolicy == api.RestartPolicyOnFailure {
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// Check the exit code of last run. Note: This assumes the result is sorted
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// by the created time in reverse order.
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if resultStatus[0].State.Terminated.ExitCode == 0 {
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glog.V(4).Infof("Already successfully ran container %q of pod %q, do nothing", container.Name, podFullName)
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return false
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}
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}
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}
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return true
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}
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// HashContainer returns the hash of the container. It is used to compare
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// the running container with its desired spec.
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func HashContainer(container *api.Container) uint64 {
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hash := adler32.New()
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util.DeepHashObject(hash, *container)
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return uint64(hash.Sum32())
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}
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// EnvVarsToMap constructs a map of environment name to value from a slice
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// of env vars.
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func EnvVarsToMap(envs []EnvVar) map[string]string {
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result := map[string]string{}
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for _, env := range envs {
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result[env.Name] = env.Value
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}
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return result
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}
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func ExpandContainerCommandAndArgs(container *api.Container, envs []EnvVar) (command []string, args []string) {
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mapping := expansion.MappingFuncFor(EnvVarsToMap(envs))
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if len(container.Command) != 0 {
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for _, cmd := range container.Command {
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command = append(command, expansion.Expand(cmd, mapping))
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}
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}
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if len(container.Args) != 0 {
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for _, arg := range container.Args {
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args = append(args, expansion.Expand(arg, mapping))
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}
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}
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return command, args
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}
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