134 lines
3.0 KiB
Go
134 lines
3.0 KiB
Go
/*
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Copyright 2021 Alibaba Group Holding Limited.
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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 config
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import (
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"context"
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"time"
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"github.com/go-logr/logr"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/yaml"
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"sigs.k8s.io/controller-runtime/pkg/client"
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configutil "github.com/alibaba/polardbx-operator/pkg/util/config"
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"github.com/alibaba/polardbx-operator/pkg/util/config/bundle"
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"github.com/alibaba/polardbx-operator/pkg/util/config/loader"
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"github.com/alibaba/polardbx-operator/pkg/util/config/store"
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)
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type LoaderFactory func() func() Config
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type loaderConfig struct {
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loader loader.Loader
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logger logr.Logger
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store *store.Store
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}
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type Option func(opts *loaderConfig)
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func LoadFromPath(path string) Option {
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return func(opts *loaderConfig) {
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opts.loader = loader.NewFileSystemLoader(path)
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}
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}
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func LoadFromK8sConfigMap(client client.Client, key types.NamespacedName) Option {
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return func(opts *loaderConfig) {
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opts.loader = loader.NewK8sConfigMapLoader(
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loader.K8sOptions{
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Client: client,
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Key: key,
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},
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)
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}
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}
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func LoadFromK8sSecret(client client.Client, key types.NamespacedName) Option {
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return func(opts *loaderConfig) {
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opts.loader = loader.NewK8sSecretLoader(
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loader.K8sOptions{
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Client: client,
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Key: key,
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},
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)
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}
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}
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func WithLogger(logger logr.Logger) Option {
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return func(opts *loaderConfig) {
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opts.logger = logger
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}
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}
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func newConfigRefreshDriver(opts *loaderConfig) configutil.WatchDriver {
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return configutil.NewConfigWatchDriver(
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opts.loader,
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func(b bundle.Bundle) (interface{}, error) {
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r, err := bundle.GetOneFromBundle(b, "config.yaml", "config.json")
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if err != nil {
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return nil, err
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}
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var c config
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decoder := yaml.NewYAMLOrJSONDecoder(r, 512)
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err = decoder.Decode(&c)
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if err != nil {
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return nil, err
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}
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return &c, nil
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},
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configutil.WatchDriverOptions{
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Logger: opts.logger,
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Interval: time.Second,
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Watchers: []configutil.Watcher{
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func(i interface{}) {
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opts.store.Update(i)
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},
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},
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},
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)
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}
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func NewConfigLoaderAndStartBackgroundRefresh(ctx context.Context, opts ...Option) (LoaderFactory, error) {
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loaderConfig := &loaderConfig{
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store: &store.Store{},
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}
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for _, o := range opts {
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o(loaderConfig)
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}
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driver := newConfigRefreshDriver(loaderConfig)
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err := driver.Start(ctx)
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if err != nil {
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return nil, err
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}
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s := loaderConfig.store
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return func() func() Config {
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s := s.Cached(true)
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return func() Config {
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v := s.Get()
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if v == nil {
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return nil
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}
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return v.(Config)
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}
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}, nil
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}
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