71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
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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