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Kubelet: support retrieving stats using UID of mirror pod

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Kubelet supports retrieving stats for pods/containers with and without UID.
This does not always work for the static pods because users may get the UIDs of
the mirror pods from the API server, and use them to query Kubelet. In this
case, Kubelet would fail to locate the containers due to mismatched UIDs.

This change adds a intenral mirror to static pod UID mapping and teaches all
public-facing functions to perform UID lookup before proceeding. This allows
users to use either mirror or static pod's UID to retrieve stats.
This commit is contained in:
Yu-Ju Hong
2015-03-20 13:55:26 -07:00
parent 0250fcfd8f
commit 15e9760bd4
6 changed files with 240 additions and 47 deletions
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3
pkg/kubelet/server.go
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@@ -37,7 +37,6 @@ import (
"github.com/GoogleCloudPlatform/kubernetes/pkg/httplog"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util/httpstream"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util/httpstream/spdy"
"github.com/golang/glog"
@@ -83,7 +82,7 @@ type HostInterface interface {
GetRootInfo(req *cadvisorApi.ContainerInfoRequest) (*cadvisorApi.ContainerInfo, error)
GetDockerVersion() ([]uint, error)
GetCachedMachineInfo() (*cadvisorApi.MachineInfo, error)
GetPods() ([]api.Pod, util.StringSet)
GetPods() ([]api.Pod, mirrorPods)
GetPodByName(namespace, name string) (*api.Pod, bool)
GetPodStatus(name string, uid types.UID) (api.PodStatus, error)
RunInContainer(name string, uid types.UID, container string, cmd []string) ([]byte, error)