mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
130 lines
3.0 KiB
Go
130 lines
3.0 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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"errors"
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"fmt"
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"sync"
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"time"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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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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storageError error
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cidr string
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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) 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) setStorageState(err error) {
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s.Lock()
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defer s.Unlock()
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s.storageError = 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) runtimeErrors() error {
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s.RLock()
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defer s.RUnlock()
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errs := []error{}
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if s.lastBaseRuntimeSync.IsZero() {
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errs = append(errs, errors.New("container runtime status check may not have completed yet."))
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} else if !s.lastBaseRuntimeSync.Add(s.baseRuntimeSyncThreshold).After(time.Now()) {
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errs = append(errs, errors.New("container runtime is down."))
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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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errs = append(errs, fmt.Errorf("%s is not healthy: %v.", hc.name, err))
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}
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}
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return utilerrors.NewAggregate(errs)
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}
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func (s *runtimeState) networkErrors() error {
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s.RLock()
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defer s.RUnlock()
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errs := []error{}
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if s.networkError != nil {
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errs = append(errs, s.networkError)
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}
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return utilerrors.NewAggregate(errs)
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}
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func (s *runtimeState) storageErrors() error {
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s.RLock()
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defer s.RUnlock()
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errs := []error{}
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if s.storageError != nil {
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errs = append(errs, s.storageError)
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}
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return utilerrors.NewAggregate(errs)
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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: ErrNetworkUnknown,
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}
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}
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