87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
/*
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Copyright 2013 CoreOS Inc.
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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 main
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import (
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"net/url"
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"path"
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)
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// we map node name to url
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type nodeInfo struct {
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raftVersion string
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raftURL string
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etcdURL string
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}
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var namesMap = make(map[string]*nodeInfo)
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// nameToEtcdURL maps node name to its etcd http address
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func nameToEtcdURL(name string) (string, bool) {
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if info, ok := namesMap[name]; ok {
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// first try to read from the map
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return info.etcdURL, true
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}
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// if fails, try to recover from etcd storage
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return readURL(name, "etcd")
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}
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// nameToRaftURL maps node name to its raft http address
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func nameToRaftURL(name string) (string, bool) {
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if info, ok := namesMap[name]; ok {
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// first try to read from the map
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return info.raftURL, true
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}
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// if fails, try to recover from etcd storage
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return readURL(name, "raft")
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}
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// addNameToURL add a name that maps to raftURL and etcdURL
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func addNameToURL(name string, version string, raftURL string, etcdURL string) {
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namesMap[name] = &nodeInfo{
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raftVersion: raftVersion,
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raftURL: raftURL,
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etcdURL: etcdURL,
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}
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}
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func readURL(nodeName string, urlName string) (string, bool) {
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// if fails, try to recover from etcd storage
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key := path.Join("/_etcd/machines", nodeName)
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resps, err := etcdStore.RawGet(key)
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if err != nil {
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return "", false
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}
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m, err := url.ParseQuery(resps[0].Value)
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if err != nil {
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panic("Failed to parse machines entry")
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}
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url := m[urlName][0]
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return url, true
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}
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