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kubernetes.go
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kubernetes.go
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// Copyright 2020 The PipeCD 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 kubernetes
import (
"context"
"time"
"go.uber.org/zap"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
// Import to load the needs plugins such as gcp, azure, oidc, openstack.
_ "k8s.io/client-go/plugin/pkg/client/auth"
provider "github.com/pipe-cd/pipecd/pkg/app/piped/cloudprovider/kubernetes"
"github.com/pipe-cd/pipecd/pkg/config"
"github.com/pipe-cd/pipecd/pkg/model"
)
type Store struct {
config *config.CloudProviderKubernetesConfig
pipedConfig *config.PipedSpec
kubeConfig *restclient.Config
store *store
watchingResourceKinds []provider.APIVersionKind
firstSyncedCh chan error
logger *zap.Logger
}
type Getter interface {
GetKubernetesAppLiveState(appID string) (AppState, bool)
NewEventIterator() EventIterator
GetWatchingResourceKinds() []provider.APIVersionKind
GetAppLiveManifests(appID string) []provider.Manifest
WaitForReady(ctx context.Context, timeout time.Duration) error
}
type AppState struct {
Resources []*model.KubernetesResourceState
Version model.ApplicationLiveStateVersion
}
type EventIterator struct {
id int
store *store
}
func (it EventIterator) Next(maxNum int) []model.KubernetesResourceStateEvent {
return it.store.nextEvents(it.id, maxNum)
}
func NewStore(cfg *config.CloudProviderKubernetesConfig, pipedConfig *config.PipedSpec, cloudProvider string, logger *zap.Logger) *Store {
logger = logger.Named("kubernetes").
With(zap.String("cloud-provider", cloudProvider))
return &Store{
config: cfg,
pipedConfig: pipedConfig,
store: &store{
pipedConfig: pipedConfig,
apps: make(map[string]*appNodes),
resources: make(map[string]appResource),
iterators: make(map[int]int, 1),
logger: logger.Named("store"),
},
firstSyncedCh: make(chan error, 1),
logger: logger,
}
}
func (s *Store) Run(ctx context.Context) error {
s.logger.Info("start running kubernetes app state store")
// Build kubeconfig for initialing kubernetes clients later.
var err error
s.kubeConfig, err = clientcmd.BuildConfigFromFlags(s.config.MasterURL, s.config.KubeConfigPath)
if err != nil {
s.logger.Error("failed to build kube config", zap.Error(err))
return err
}
stopCh := make(chan struct{})
rf := reflector{
config: s.config,
kubeConfig: s.kubeConfig,
pipedConfig: s.pipedConfig,
onAdd: s.store.onAddResource,
onUpdate: s.store.onUpdateResource,
onDelete: s.store.onDeleteResource,
stopCh: stopCh,
logger: s.logger.Named("reflector"),
}
if err := rf.start(ctx); err != nil {
s.firstSyncedCh <- err
return err
}
s.watchingResourceKinds = rf.watchingResourceKinds
s.logger.Info("the reflector has done the first sync")
s.store.initialize()
s.logger.Info("the store has done the initializing")
close(s.firstSyncedCh)
<-ctx.Done()
close(stopCh)
s.logger.Info("kubernetes app state store has been stopped")
return nil
}
func (s *Store) WaitForReady(ctx context.Context, timeout time.Duration) error {
ctx, cancel := context.WithTimeout(ctx, timeout)
defer cancel()
select {
case <-ctx.Done():
return nil
case err := <-s.firstSyncedCh:
return err
}
}
func (s *Store) GetKubernetesAppLiveState(appID string) (AppState, bool) {
return s.store.getAppLiveState(appID)
}
func (s *Store) NewEventIterator() EventIterator {
return s.store.newEventIterator()
}
func (s *Store) GetWatchingResourceKinds() []provider.APIVersionKind {
return s.watchingResourceKinds
}
func (s *Store) GetAppLiveManifests(appID string) []provider.Manifest {
return s.store.GetAppLiveManifests(appID)
}