mirror of https://github.com/k3s-io/k3s
Migrate oom watcher not relying on cAdviosr any more, it is part of plan
of removing cAdvisor from k8s. For more informations about this plan, please refer: https://github.com/kubernetes/kubernetes/issues/68522k3s-v1.15.3
WanLinghao
parent
6af2e9afea
commit
b2ce446a88
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@ -21,7 +21,6 @@ go_library(
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"kubelet_pods.go",
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"kubelet_resources.go",
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"kubelet_volumes.go",
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"oom_watcher.go",
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"pod_container_deletor.go",
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"pod_workers.go",
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"reason_cache.go",
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@ -72,6 +71,7 @@ go_library(
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"//pkg/kubelet/network/dns:go_default_library",
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"//pkg/kubelet/nodelease:go_default_library",
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"//pkg/kubelet/nodestatus:go_default_library",
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"//pkg/kubelet/oom:go_default_library",
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"//pkg/kubelet/pleg:go_default_library",
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"//pkg/kubelet/pod:go_default_library",
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"//pkg/kubelet/preemption:go_default_library",
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@ -144,7 +144,6 @@ go_library(
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"//staging/src/k8s.io/node-api/pkg/client/clientset/versioned:go_default_library",
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"//third_party/forked/golang/expansion:go_default_library",
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"//vendor/github.com/golang/groupcache/lru:go_default_library",
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"//vendor/github.com/google/cadvisor/events:go_default_library",
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"//vendor/github.com/google/cadvisor/info/v1:go_default_library",
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"//vendor/github.com/google/cadvisor/info/v2:go_default_library",
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"//vendor/k8s.io/klog:go_default_library",
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@ -168,7 +167,6 @@ go_test(
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"kubelet_test.go",
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"kubelet_volumes_linux_test.go",
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"kubelet_volumes_test.go",
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"oom_watcher_test.go",
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"pod_container_deletor_test.go",
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"pod_workers_test.go",
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"reason_cache_test.go",
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@ -297,6 +295,7 @@ filegroup(
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"//pkg/kubelet/network:all-srcs",
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"//pkg/kubelet/nodelease:all-srcs",
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"//pkg/kubelet/nodestatus:all-srcs",
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"//pkg/kubelet/oom:all-srcs",
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"//pkg/kubelet/pleg:all-srcs",
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"//pkg/kubelet/pod:all-srcs",
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"//pkg/kubelet/preemption:all-srcs",
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@ -80,6 +80,7 @@ import (
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"k8s.io/kubernetes/pkg/kubelet/metrics/collectors"
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"k8s.io/kubernetes/pkg/kubelet/network/dns"
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"k8s.io/kubernetes/pkg/kubelet/nodelease"
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oomwatcher "k8s.io/kubernetes/pkg/kubelet/oom"
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"k8s.io/kubernetes/pkg/kubelet/pleg"
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kubepod "k8s.io/kubernetes/pkg/kubelet/pod"
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"k8s.io/kubernetes/pkg/kubelet/preemption"
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@ -469,7 +470,7 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
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containerRefManager := kubecontainer.NewRefManager()
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oomWatcher := NewOOMWatcher(kubeDeps.CAdvisorInterface, kubeDeps.Recorder)
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oomWatcher := oomwatcher.NewOOMWatcher(kubeDeps.Recorder)
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clusterDNS := make([]net.IP, 0, len(kubeCfg.ClusterDNS))
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for _, ipEntry := range kubeCfg.ClusterDNS {
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@ -1088,7 +1089,7 @@ type Kubelet struct {
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os kubecontainer.OSInterface
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// Watcher of out of memory events.
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oomWatcher OOMWatcher
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oomWatcher oomwatcher.OOMWatcher
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// Monitor resource usage
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resourceAnalyzer serverstats.ResourceAnalyzer
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@ -0,0 +1,82 @@
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load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
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go_library(
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name = "go_default_library",
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srcs = [
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"oom_watcher_linux.go",
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"oom_watcher_unsupported.go",
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"types.go",
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],
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importpath = "k8s.io/kubernetes/pkg/kubelet/oom",
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visibility = ["//visibility:public"],
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deps = [
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"//staging/src/k8s.io/api/core/v1:go_default_library",
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] + select({
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"@io_bazel_rules_go//go/platform:android": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:darwin": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:dragonfly": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:freebsd": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:linux": [
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"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/runtime:go_default_library",
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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"//vendor/github.com/google/cadvisor/utils/oomparser:go_default_library",
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"//vendor/k8s.io/klog:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:nacl": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:netbsd": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:openbsd": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:plan9": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:solaris": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"@io_bazel_rules_go//go/platform:windows": [
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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],
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"//conditions:default": [],
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}),
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)
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go_test(
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name = "go_default_test",
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srcs = ["oom_watcher_linux_test.go"],
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embed = [":go_default_library"],
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deps = select({
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"@io_bazel_rules_go//go/platform:linux": [
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"//staging/src/k8s.io/api/core/v1:go_default_library",
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"//staging/src/k8s.io/client-go/tools/record:go_default_library",
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"//vendor/github.com/stretchr/testify/assert:go_default_library",
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],
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"//conditions:default": [],
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}),
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)
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filegroup(
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name = "package-srcs",
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srcs = glob(["**"]),
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tags = ["automanaged"],
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visibility = ["//visibility:private"],
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)
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filegroup(
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name = "all-srcs",
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srcs = [":package-srcs"],
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tags = ["automanaged"],
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visibility = ["//visibility:public"],
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)
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@ -1,3 +1,5 @@
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// +build linux
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/*
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Copyright 2015 The Kubernetes Authors.
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@ -14,61 +16,52 @@ 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 kubelet
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package oom
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import (
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"github.com/google/cadvisor/events"
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cadvisorapi "github.com/google/cadvisor/info/v1"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/client-go/tools/record"
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"k8s.io/klog"
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"k8s.io/kubernetes/pkg/kubelet/cadvisor"
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"github.com/google/cadvisor/utils/oomparser"
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)
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// OOMWatcher defines the interface of OOM watchers.
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type OOMWatcher interface {
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Start(ref *v1.ObjectReference) error
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}
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type realOOMWatcher struct {
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cadvisor cadvisor.Interface
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recorder record.EventRecorder
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}
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var _ OOMWatcher = &realOOMWatcher{}
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// NewOOMWatcher creates and initializes a OOMWatcher based on parameters.
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func NewOOMWatcher(cadvisor cadvisor.Interface, recorder record.EventRecorder) OOMWatcher {
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func NewOOMWatcher(recorder record.EventRecorder) OOMWatcher {
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return &realOOMWatcher{
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cadvisor: cadvisor,
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recorder: recorder,
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}
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}
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const systemOOMEvent = "SystemOOM"
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// Watches cadvisor for system oom's and records an event for every system oom encountered.
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// Watches for system oom's and records an event for every system oom encountered.
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func (ow *realOOMWatcher) Start(ref *v1.ObjectReference) error {
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request := events.Request{
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EventType: map[cadvisorapi.EventType]bool{
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cadvisorapi.EventOom: true,
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},
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ContainerName: "/",
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IncludeSubcontainers: false,
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}
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eventChannel, err := ow.cadvisor.WatchEvents(&request)
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oomLog, err := oomparser.New()
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if err != nil {
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return err
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}
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outStream := make(chan *oomparser.OomInstance, 10)
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go oomLog.StreamOoms(outStream)
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go func() {
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defer runtime.HandleCrash()
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for event := range eventChannel.GetChannel() {
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klog.V(2).Infof("Got sys oom event from cadvisor: %v", event)
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ow.recorder.PastEventf(ref, metav1.Time{Time: event.Timestamp}, v1.EventTypeWarning, systemOOMEvent, "System OOM encountered")
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for event := range outStream {
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if event.ContainerName == "/" {
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klog.V(1).Infof("Got sys oom event: %v", event)
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ow.recorder.PastEventf(ref, metav1.Time{Time: event.TimeOfDeath}, v1.EventTypeWarning, systemOOMEvent, "System OOM encountered")
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}
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}
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klog.Errorf("Unexpectedly stopped receiving OOM notifications from cAdvisor")
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klog.Errorf("Unexpectedly stopped receiving OOM notifications")
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}()
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return nil
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}
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@ -14,7 +14,7 @@ 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 kubelet
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package oom
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import (
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"testing"
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@ -23,14 +23,12 @@ import (
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"k8s.io/api/core/v1"
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"k8s.io/client-go/tools/record"
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cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
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)
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func TestBasic(t *testing.T) {
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fakeRecorder := &record.FakeRecorder{}
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mockCadvisor := &cadvisortest.Fake{}
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node := &v1.ObjectReference{}
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oomWatcher := NewOOMWatcher(mockCadvisor, fakeRecorder)
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oomWatcher := NewOOMWatcher(fakeRecorder)
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assert.NoError(t, oomWatcher.Start(node))
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// TODO: Improve this test once cadvisor exports events.EventChannel as an interface
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@ -0,0 +1,35 @@
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// +build !linux
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/*
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Copyright 2019 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 oom
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import (
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"k8s.io/api/core/v1"
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"k8s.io/client-go/tools/record"
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)
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type oomWatcherUnsupported struct{}
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var _ OOMWatcher = new(oomWatcherUnsupported)
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func NewOOMWatcher(_ record.EventRecorder) OOMWatcher {
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return &oomWatcherUnsupported{}
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}
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func (ow *oomWatcherUnsupported) Start(_ *v1.ObjectReference) error {
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return nil
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}
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@ -0,0 +1,25 @@
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/*
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Copyright 2019 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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|
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Unless required by applicable law or agreed to in writing, software
|
||||
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.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
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*/
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package oom
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import (
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"k8s.io/api/core/v1"
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)
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// OOMWatcher defines the interface of OOM watchers.
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type OOMWatcher interface {
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Start(ref *v1.ObjectReference) error
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}
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Loading…
Reference in New Issue