273 lines
9.9 KiB
Go
273 lines
9.9 KiB
Go
/*
|
|
Copyright 2016 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 kubelet
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"path"
|
|
|
|
"github.com/golang/glog"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/kubernetes/cmd/kubelet/app/options"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/kubelet/cm"
|
|
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
|
|
"k8s.io/kubernetes/pkg/util"
|
|
nodeutil "k8s.io/kubernetes/pkg/util/node"
|
|
volumeutil "k8s.io/kubernetes/pkg/volume/util"
|
|
)
|
|
|
|
// getRootDir returns the full path to the directory under which kubelet can
|
|
// store data. These functions are useful to pass interfaces to other modules
|
|
// that may need to know where to write data without getting a whole kubelet
|
|
// instance.
|
|
func (kl *Kubelet) getRootDir() string {
|
|
return kl.rootDirectory
|
|
}
|
|
|
|
// getPodsDir returns the full path to the directory under which pod
|
|
// directories are created.
|
|
func (kl *Kubelet) getPodsDir() string {
|
|
return path.Join(kl.getRootDir(), options.DefaultKubeletPodsDirName)
|
|
}
|
|
|
|
// getPluginsDir returns the full path to the directory under which plugin
|
|
// directories are created. Plugins can use these directories for data that
|
|
// they need to persist. Plugins should create subdirectories under this named
|
|
// after their own names.
|
|
func (kl *Kubelet) getPluginsDir() string {
|
|
return path.Join(kl.getRootDir(), options.DefaultKubeletPluginsDirName)
|
|
}
|
|
|
|
// getPluginDir returns a data directory name for a given plugin name.
|
|
// Plugins can use these directories to store data that they need to persist.
|
|
// For per-pod plugin data, see getPodPluginDir.
|
|
func (kl *Kubelet) getPluginDir(pluginName string) string {
|
|
return path.Join(kl.getPluginsDir(), pluginName)
|
|
}
|
|
|
|
// GetPodDir returns the full path to the per-pod data directory for the
|
|
// specified pod. This directory may not exist if the pod does not exist.
|
|
func (kl *Kubelet) GetPodDir(podUID types.UID) string {
|
|
return kl.getPodDir(podUID)
|
|
}
|
|
|
|
// getPodDir returns the full path to the per-pod directory for the pod with
|
|
// the given UID.
|
|
func (kl *Kubelet) getPodDir(podUID types.UID) string {
|
|
// Backwards compat. The "old" stuff should be removed before 1.0
|
|
// release. The thinking here is this:
|
|
// !old && !new = use new
|
|
// !old && new = use new
|
|
// old && !new = use old
|
|
// old && new = use new (but warn)
|
|
oldPath := path.Join(kl.getRootDir(), string(podUID))
|
|
oldExists := dirExists(oldPath)
|
|
newPath := path.Join(kl.getPodsDir(), string(podUID))
|
|
newExists := dirExists(newPath)
|
|
if oldExists && !newExists {
|
|
return oldPath
|
|
}
|
|
if oldExists {
|
|
glog.Warningf("Data dir for pod %q exists in both old and new form, using new", podUID)
|
|
}
|
|
return newPath
|
|
}
|
|
|
|
// getPodVolumesDir returns the full path to the per-pod data directory under
|
|
// which volumes are created for the specified pod. This directory may not
|
|
// exist if the pod does not exist.
|
|
func (kl *Kubelet) getPodVolumesDir(podUID types.UID) string {
|
|
return path.Join(kl.getPodDir(podUID), options.DefaultKubeletVolumesDirName)
|
|
}
|
|
|
|
// getPodVolumeDir returns the full path to the directory which represents the
|
|
// named volume under the named plugin for specified pod. This directory may not
|
|
// exist if the pod does not exist.
|
|
func (kl *Kubelet) getPodVolumeDir(podUID types.UID, pluginName string, volumeName string) string {
|
|
return path.Join(kl.getPodVolumesDir(podUID), pluginName, volumeName)
|
|
}
|
|
|
|
// getPodPluginsDir returns the full path to the per-pod data directory under
|
|
// which plugins may store data for the specified pod. This directory may not
|
|
// exist if the pod does not exist.
|
|
func (kl *Kubelet) getPodPluginsDir(podUID types.UID) string {
|
|
return path.Join(kl.getPodDir(podUID), options.DefaultKubeletPluginsDirName)
|
|
}
|
|
|
|
// getPodPluginDir returns a data directory name for a given plugin name for a
|
|
// given pod UID. Plugins can use these directories to store data that they
|
|
// need to persist. For non-per-pod plugin data, see getPluginDir.
|
|
func (kl *Kubelet) getPodPluginDir(podUID types.UID, pluginName string) string {
|
|
return path.Join(kl.getPodPluginsDir(podUID), pluginName)
|
|
}
|
|
|
|
// getPodContainerDir returns the full path to the per-pod data directory under
|
|
// which container data is held for the specified pod. This directory may not
|
|
// exist if the pod or container does not exist.
|
|
func (kl *Kubelet) getPodContainerDir(podUID types.UID, ctrName string) string {
|
|
// Backwards compat. The "old" stuff should be removed before 1.0
|
|
// release. The thinking here is this:
|
|
// !old && !new = use new
|
|
// !old && new = use new
|
|
// old && !new = use old
|
|
// old && new = use new (but warn)
|
|
oldPath := path.Join(kl.getPodDir(podUID), ctrName)
|
|
oldExists := dirExists(oldPath)
|
|
newPath := path.Join(kl.getPodDir(podUID), options.DefaultKubeletContainersDirName, ctrName)
|
|
newExists := dirExists(newPath)
|
|
if oldExists && !newExists {
|
|
return oldPath
|
|
}
|
|
if oldExists {
|
|
glog.Warningf("Data dir for pod %q, container %q exists in both old and new form, using new", podUID, ctrName)
|
|
}
|
|
return newPath
|
|
}
|
|
|
|
// GetPods returns all pods bound to the kubelet and their spec, and the mirror
|
|
// pods.
|
|
func (kl *Kubelet) GetPods() []*v1.Pod {
|
|
return kl.podManager.GetPods()
|
|
}
|
|
|
|
// GetRunningPods returns all pods running on kubelet from looking at the
|
|
// container runtime cache. This function converts kubecontainer.Pod to
|
|
// v1.Pod, so only the fields that exist in both kubecontainer.Pod and
|
|
// v1.Pod are considered meaningful.
|
|
func (kl *Kubelet) GetRunningPods() ([]*v1.Pod, error) {
|
|
pods, err := kl.runtimeCache.GetPods()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
apiPods := make([]*v1.Pod, 0, len(pods))
|
|
for _, pod := range pods {
|
|
apiPods = append(apiPods, pod.ToAPIPod())
|
|
}
|
|
return apiPods, nil
|
|
}
|
|
|
|
// GetPodByFullName gets the pod with the given 'full' name, which
|
|
// incorporates the namespace as well as whether the pod was found.
|
|
func (kl *Kubelet) GetPodByFullName(podFullName string) (*v1.Pod, bool) {
|
|
return kl.podManager.GetPodByFullName(podFullName)
|
|
}
|
|
|
|
// GetPodByName provides the first pod that matches namespace and name, as well
|
|
// as whether the pod was found.
|
|
func (kl *Kubelet) GetPodByName(namespace, name string) (*v1.Pod, bool) {
|
|
return kl.podManager.GetPodByName(namespace, name)
|
|
}
|
|
|
|
// GetHostname Returns the hostname as the kubelet sees it.
|
|
func (kl *Kubelet) GetHostname() string {
|
|
return kl.hostname
|
|
}
|
|
|
|
// GetRuntime returns the current Runtime implementation in use by the kubelet. This func
|
|
// is exported to simplify integration with third party kubelet extensions (e.g. kubernetes-mesos).
|
|
func (kl *Kubelet) GetRuntime() kubecontainer.Runtime {
|
|
return kl.containerRuntime
|
|
}
|
|
|
|
// GetNode returns the node info for the configured node name of this Kubelet.
|
|
func (kl *Kubelet) GetNode() (*v1.Node, error) {
|
|
if kl.standaloneMode {
|
|
return kl.initialNode()
|
|
}
|
|
return kl.nodeInfo.GetNodeInfo(string(kl.nodeName))
|
|
}
|
|
|
|
// getNodeAnyWay() must return a *v1.Node which is required by RunGeneralPredicates().
|
|
// The *v1.Node is obtained as follows:
|
|
// Return kubelet's nodeInfo for this node, except on error or if in standalone mode,
|
|
// in which case return a manufactured nodeInfo representing a node with no pods,
|
|
// zero capacity, and the default labels.
|
|
func (kl *Kubelet) getNodeAnyWay() (*v1.Node, error) {
|
|
if !kl.standaloneMode {
|
|
if n, err := kl.nodeInfo.GetNodeInfo(string(kl.nodeName)); err == nil {
|
|
return n, nil
|
|
}
|
|
}
|
|
return kl.initialNode()
|
|
}
|
|
|
|
// GetNodeConfig returns the container manager node config.
|
|
func (kl *Kubelet) GetNodeConfig() cm.NodeConfig {
|
|
return kl.containerManager.GetNodeConfig()
|
|
}
|
|
|
|
// Returns host IP or nil in case of error.
|
|
func (kl *Kubelet) GetHostIP() (net.IP, error) {
|
|
node, err := kl.GetNode()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot get node: %v", err)
|
|
}
|
|
return nodeutil.GetNodeHostIP(node)
|
|
}
|
|
|
|
// getHostIPAnyway attempts to return the host IP from kubelet's nodeInfo, or
|
|
// the initialNode.
|
|
func (kl *Kubelet) getHostIPAnyWay() (net.IP, error) {
|
|
node, err := kl.getNodeAnyWay()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return nodeutil.GetNodeHostIP(node)
|
|
}
|
|
|
|
// GetExtraSupplementalGroupsForPod returns a list of the extra
|
|
// supplemental groups for the Pod. These extra supplemental groups come
|
|
// from annotations on persistent volumes that the pod depends on.
|
|
func (kl *Kubelet) GetExtraSupplementalGroupsForPod(pod *v1.Pod) []int64 {
|
|
return kl.volumeManager.GetExtraSupplementalGroupsForPod(pod)
|
|
}
|
|
|
|
// getPodVolumePathListFromDisk returns a list of the volume paths by reading the
|
|
// volume directories for the given pod from the disk.
|
|
func (kl *Kubelet) getPodVolumePathListFromDisk(podUID types.UID) ([]string, error) {
|
|
volumes := []string{}
|
|
podVolDir := kl.getPodVolumesDir(podUID)
|
|
|
|
if pathExists, pathErr := volumeutil.PathExists(podVolDir); pathErr != nil {
|
|
return volumes, fmt.Errorf("Error checking if path %q exists: %v", podVolDir, pathErr)
|
|
} else if !pathExists {
|
|
glog.Warningf("Warning: path %q does not exist: %q", podVolDir)
|
|
return volumes, nil
|
|
}
|
|
|
|
volumePluginDirs, err := ioutil.ReadDir(podVolDir)
|
|
if err != nil {
|
|
glog.Errorf("Could not read directory %s: %v", podVolDir, err)
|
|
return volumes, err
|
|
}
|
|
for _, volumePluginDir := range volumePluginDirs {
|
|
volumePluginName := volumePluginDir.Name()
|
|
volumePluginPath := path.Join(podVolDir, volumePluginName)
|
|
volumeDirs, err := util.ReadDirNoStat(volumePluginPath)
|
|
if err != nil {
|
|
return volumes, fmt.Errorf("Could not read directory %s: %v", volumePluginPath, err)
|
|
}
|
|
for _, volumeDir := range volumeDirs {
|
|
volumes = append(volumes, path.Join(volumePluginPath, volumeDir))
|
|
}
|
|
}
|
|
return volumes, nil
|
|
}
|