128 lines
2.9 KiB
Go
128 lines
2.9 KiB
Go
/*
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Copyright 2015 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 kubelet
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import (
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"fmt"
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"sync"
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"time"
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)
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type runtimeState struct {
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sync.RWMutex
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lastBaseRuntimeSync time.Time
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baseRuntimeSyncThreshold time.Duration
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networkError error
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internalError error
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cidr string
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initError error
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healthChecks []*healthCheck
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}
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// A health check function should be efficient and not rely on external
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// components (e.g., container runtime).
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type healthCheckFnType func() (bool, error)
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type healthCheck struct {
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name string
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fn healthCheckFnType
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}
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func (s *runtimeState) addHealthCheck(name string, f healthCheckFnType) {
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s.Lock()
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defer s.Unlock()
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s.healthChecks = append(s.healthChecks, &healthCheck{name: name, fn: f})
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}
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func (s *runtimeState) setRuntimeSync(t time.Time) {
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s.Lock()
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defer s.Unlock()
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s.lastBaseRuntimeSync = t
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}
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func (s *runtimeState) setInternalError(err error) {
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s.Lock()
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defer s.Unlock()
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s.internalError = err
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}
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func (s *runtimeState) setNetworkState(err error) {
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s.Lock()
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defer s.Unlock()
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s.networkError = err
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}
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func (s *runtimeState) setPodCIDR(cidr string) {
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s.Lock()
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defer s.Unlock()
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s.cidr = cidr
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}
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func (s *runtimeState) podCIDR() string {
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s.RLock()
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defer s.RUnlock()
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return s.cidr
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}
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func (s *runtimeState) setInitError(err error) {
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s.Lock()
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defer s.Unlock()
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s.initError = err
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}
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func (s *runtimeState) runtimeErrors() []string {
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s.RLock()
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defer s.RUnlock()
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var ret []string
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if s.initError != nil {
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ret = append(ret, s.initError.Error())
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}
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if !s.lastBaseRuntimeSync.Add(s.baseRuntimeSyncThreshold).After(time.Now()) {
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ret = append(ret, "container runtime is down")
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}
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if s.internalError != nil {
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ret = append(ret, s.internalError.Error())
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}
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for _, hc := range s.healthChecks {
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if ok, err := hc.fn(); !ok {
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ret = append(ret, fmt.Sprintf("%s is not healthy: %v", hc.name, err))
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}
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}
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return ret
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}
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func (s *runtimeState) networkErrors() []string {
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s.RLock()
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defer s.RUnlock()
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var ret []string
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if s.networkError != nil {
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ret = append(ret, s.networkError.Error())
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}
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return ret
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}
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func newRuntimeState(
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runtimeSyncThreshold time.Duration,
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) *runtimeState {
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return &runtimeState{
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lastBaseRuntimeSync: time.Time{},
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baseRuntimeSyncThreshold: runtimeSyncThreshold,
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networkError: fmt.Errorf("network state unknown"),
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internalError: nil,
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}
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}
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