forked from rook/rook
121 lines
3.4 KiB
Go
121 lines
3.4 KiB
Go
/*
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Copyright 2016 The Rook Authors. All rights reserved.
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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 api
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import (
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"fmt"
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"net/http"
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"github.com/rook/rook/pkg/clusterd"
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"github.com/rook/rook/pkg/daemon/ceph/mon"
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monop "github.com/rook/rook/pkg/operator/cluster/ceph/mon"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/kubernetes/pkg/api"
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)
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const (
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registerMetricsRetryMs = 5000
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)
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type Config struct {
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context *clusterd.Context
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port int
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clusterInfo *mon.ClusterInfo
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namespace string
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rookImage string
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hostNetwork bool
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}
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func NewConfig(context *clusterd.Context, port int, clusterInfo *mon.ClusterInfo, namespace, rookImage string, hostNetwork bool) *Config {
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return &Config{
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context: context,
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port: port,
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clusterInfo: clusterInfo,
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namespace: namespace,
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rookImage: rookImage,
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hostNetwork: hostNetwork,
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}
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}
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func Run(context *clusterd.Context, c *Config) error {
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// write the latest config to the config dir
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if err := mon.GenerateAdminConnectionConfig(context, c.clusterInfo); err != nil {
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return fmt.Errorf("failed to write connection config. %+v", err)
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}
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go WatchMonConfig(context, c)
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ServeRoutes(context, c)
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return nil
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}
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func WatchMonConfig(context *clusterd.Context, c *Config) {
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// infinite loop to keep watching forever, this function should be called in a goroutine
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for {
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// watch for changes only to the monitor endpoints config map
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opts := metav1.ListOptions{
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FieldSelector: fields.OneTermEqualSelector(api.ObjectNameField, monop.EndpointConfigMapName).String(),
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}
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w, err := context.Clientset.Core().ConfigMaps(c.namespace).Watch(opts)
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if err != nil {
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logger.Errorf("WatchMonConfig watch init error: %+v", err)
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return
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}
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defer w.Stop()
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for {
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e, ok := <-w.ResultChan()
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if !ok {
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logger.Warning("WatchMonConfig result channel closed, restarting watch.")
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w.Stop()
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break
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}
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if e.Type == watch.Modified {
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// "unmarshal" object into configmap and set new endpoints
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monEndpoints := e.Object.(*v1.ConfigMap)
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c.clusterInfo.Monitors = mon.ParseMonEndpoints(monEndpoints.Data[monop.EndpointDataKey])
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// write the latest config to the config dir
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if err := mon.GenerateAdminConnectionConfig(context, c.clusterInfo); err != nil {
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logger.Errorf("failed to write connection config. %+v", err)
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return
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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 ServeRoutes(context *clusterd.Context, c *Config) {
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// set up routes and start HTTP server for REST API
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h := newHandler(context, c)
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// register metrics collection in a goroutine so it does not block the start up of the API server.
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go func() {
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if err := h.RegisterMetrics(registerMetricsRetryMs); err != nil {
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logger.Errorf("API server init error: %+v", err)
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}
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}()
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defer h.Shutdown()
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r := newRouter(h.GetRoutes())
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if err := http.ListenAndServe(fmt.Sprintf(":%d", c.port), r); err != nil {
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logger.Errorf("API server error: %+v", err)
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}
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}
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