func (c *ClusterChecker) Check() error {
cd, _, err := c.e.GetClusterData()
if err != nil {
log.Error("cannot get cluster data", zap.Error(err))
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
if c.stopListening {
c.stopPollonProxy()
}
return nil
}
log.Debug("cd dump", zap.String("cd", spew.Sdump(cd)))
if cd == nil {
log.Info("no clusterdata available, closing connections to previous master")
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
return nil
}
if cd.FormatVersion != cluster.CurrentCDFormatVersion {
log.Error("unsupported clusterdata format version", zap.Uint64("version", cd.FormatVersion))
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
return nil
}
if err = cd.Cluster.Spec.Validate(); err != nil {
log.Error("clusterdata validation failed", zap.Error(err))
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
return nil
}
// Start pollon if not active
if err = c.startPollonProxy(); err != nil {
log.Error("failed to start proxy", zap.Error(err))
return nil
}
proxy := cd.Proxy
if proxy == nil {
log.Info("no proxy object available, closing connections to previous master")
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
if err = c.SetProxyInfo(c.e, proxy.UID, proxy.Generation, 2*cluster.DefaultProxyCheckInterval); err != nil {
log.Error("failed to update proxyInfo", zap.Error(err))
}
return nil
}
db, ok := cd.DBs[proxy.Spec.MasterDBUID]
if !ok {
log.Info("no db object available, closing connections to previous master", zap.String("db", proxy.Spec.MasterDBUID))
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
if err = c.SetProxyInfo(c.e, proxy.UID, proxy.Generation, 2*cluster.DefaultProxyCheckInterval); err != nil {
log.Error("failed to update proxyInfo", zap.Error(err))
}
return nil
}
addr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%s", db.Status.ListenAddress, db.Status.Port))
if err != nil {
log.Error("error", zap.Error(err))
c.sendPollonConfData(pollon.ConfData{DestAddr: nil})
return nil
}
log.Info("master address", zap.Stringer("address", addr))
if err = c.SetProxyInfo(c.e, proxy.UID, proxy.Generation, 2*cluster.DefaultProxyCheckInterval); err != nil {
log.Error("failed to update proxyInfo", zap.Error(err))
}
c.sendPollonConfData(pollon.ConfData{DestAddr: addr})
return nil
}
func sigHandler(sigs chan os.Signal, stop chan bool) {
s := <-sigs
log.Debug("got signal", zap.Stringer("signal", s))
close(stop)
}