ceph-csi/vendor/k8s.io/kubernetes/pkg/kubelet/runtime.go

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2018-01-09 18:57:14 +00:00
/*
Copyright 2015 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"
"sync"
"time"
)
type runtimeState struct {
sync.RWMutex
lastBaseRuntimeSync time.Time
baseRuntimeSyncThreshold time.Duration
networkError error
internalError error
cidr string
healthChecks []*healthCheck
}
// A health check function should be efficient and not rely on external
// components (e.g., container runtime).
type healthCheckFnType func() (bool, error)
type healthCheck struct {
name string
fn healthCheckFnType
}
func (s *runtimeState) addHealthCheck(name string, f healthCheckFnType) {
s.Lock()
defer s.Unlock()
s.healthChecks = append(s.healthChecks, &healthCheck{name: name, fn: f})
}
func (s *runtimeState) setRuntimeSync(t time.Time) {
s.Lock()
defer s.Unlock()
s.lastBaseRuntimeSync = t
}
func (s *runtimeState) setInternalError(err error) {
s.Lock()
defer s.Unlock()
s.internalError = err
}
func (s *runtimeState) setNetworkState(err error) {
s.Lock()
defer s.Unlock()
s.networkError = err
}
func (s *runtimeState) setPodCIDR(cidr string) {
s.Lock()
defer s.Unlock()
s.cidr = cidr
}
func (s *runtimeState) podCIDR() string {
s.RLock()
defer s.RUnlock()
return s.cidr
}
func (s *runtimeState) runtimeErrors() []string {
s.RLock()
defer s.RUnlock()
var ret []string
if !s.lastBaseRuntimeSync.Add(s.baseRuntimeSyncThreshold).After(time.Now()) {
ret = append(ret, "container runtime is down")
}
if s.internalError != nil {
ret = append(ret, s.internalError.Error())
}
for _, hc := range s.healthChecks {
if ok, err := hc.fn(); !ok {
ret = append(ret, fmt.Sprintf("%s is not healthy: %v", hc.name, err))
}
}
return ret
}
func (s *runtimeState) networkErrors() []string {
s.RLock()
defer s.RUnlock()
var ret []string
if s.networkError != nil {
ret = append(ret, s.networkError.Error())
}
return ret
}
func newRuntimeState(
runtimeSyncThreshold time.Duration,
) *runtimeState {
return &runtimeState{
lastBaseRuntimeSync: time.Time{},
baseRuntimeSyncThreshold: runtimeSyncThreshold,
networkError: fmt.Errorf("network state unknown"),
internalError: nil,
}
}