func (this *FunServantImpl) ZkChildren(ctx *rpc.Context,
path string) (r []string, ex error) {
const IDENT = "zk.children"
profiler, err := this.getSession(ctx).startProfiler()
if err != nil {
ex = err
return
}
svtStats.inc(IDENT)
r, ex = etclib.Children(path)
profiler.do(IDENT, ctx, "{path^%s} {r^%+v err^%v}",
path, r, ex)
return
}
func watchMaintain() {
const PATH = "/maintain"
ch := make(chan []string, 10)
go etclib.WatchChildren(PATH, ch)
for {
select {
case <-ch:
kingdoms, err := etclib.Children(PATH)
if err == nil {
log.Trace("maintain kingdoms updated: %+v", kingdoms)
dumpMaintainConfigPhp(kingdoms)
} else {
log.Error("maintain kingdom: %s", err)
}
}
}
log.Warn("maintain watcher died")
}
func (this *Start) main() {
ctx.LoadFromHome()
// TODO zk session timeout
err := etclib.Dial(strings.Split(ctx.ZoneZkAddrs(this.zone), ","))
swalllow(err)
root := zkr.Root(this.zone)
ch := make(chan []string, 10)
go etclib.WatchChildren(root, ch)
var servers = BackendServers{
CpuNum: ctx.NumCPU(),
HaproxyRoot: this.root,
ForwardFor: this.forwardFor,
PubPort: this.pubPort,
SubPort: this.subPort,
ManPort: this.manPort,
}
var lastInstances []string
for {
select {
case <-this.quitCh:
time.Sleep(time.Second) // FIXME just wait log flush
return
case <-ch:
kwInstances, err := etclib.Children(root)
if err != nil {
log.Error("%s: %v", root, err)
continue
}
log.Info("kateway ids: %+v -> %+v", lastInstances, kwInstances)
lastInstances = kwInstances
servers.reset()
for _, kwId := range kwInstances {
kwNode := fmt.Sprintf("%s/%s", root, kwId)
data, err := etclib.Get(kwNode)
if err != nil {
log.Error("%s: %v", kwNode, err)
continue
}
info := make(map[string]string)
if err = json.Unmarshal([]byte(data), &info); err != nil {
log.Error("%s: %v", data, err)
continue
}
// pub
if info["pub"] != "" {
be := Backend{
Name: "p" + info["id"],
Addr: info["pub"],
Cpu: info["cpu"],
}
servers.Pub = append(servers.Pub, be)
}
// sub
if info["sub"] != "" {
be := Backend{
Name: "s" + info["id"],
Addr: info["sub"],
Cpu: info["cpu"],
}
servers.Sub = append(servers.Sub, be)
}
// man
if info["man"] != "" {
be := Backend{
Name: "m" + info["id"],
Addr: info["man"],
Cpu: info["cpu"],
}
servers.Man = append(servers.Man, be)
}
}
if err = this.createConfigFile(servers); err != nil {
log.Error(err)
continue
}
if err = this.reloadHAproxy(); err != nil {
log.Error("reloading haproxy: %v", err)
panic(err)
}
}
}
}