func (agent *ActionAgent) initHealthCheck() {
if !agent.IsRunningHealthCheck() {
log.Infof("No target_tablet_type specified, disabling any health check")
return
}
tt, err := topoproto.ParseTabletType(*targetTabletType)
if err != nil {
log.Fatalf("Invalid target tablet type %v: %v", *targetTabletType, err)
}
log.Infof("Starting periodic health check every %v with target_tablet_type=%v", *healthCheckInterval, *targetTabletType)
t := timer.NewTimer(*healthCheckInterval)
servenv.OnTermSync(func() {
// When we enter lameduck mode, we want to not call
// the health check any more. After this returns, we
// are guaranteed to not call it.
log.Info("Stopping periodic health check timer")
t.Stop()
// Now we can finish up and force ourselves to not healthy.
agent.terminateHealthChecks(tt)
})
t.Start(func() {
agent.runHealthCheck(tt)
})
t.Trigger()
}
// initHealthCheck will start the health check background go routine,
// and configure the healthcheck shutdown. It is only run by NewActionAgent
// for real vttablet agents (not by tests, nor vtcombo).
func (agent *ActionAgent) initHealthCheck() {
registerReplicationReporter(agent)
log.Infof("Starting periodic health check every %v", *healthCheckInterval)
t := timer.NewTimer(*healthCheckInterval)
servenv.OnTermSync(func() {
// When we enter lameduck mode, we want to not call
// the health check any more. After this returns, we
// are guaranteed to not call it.
log.Info("Stopping periodic health check timer")
t.Stop()
// Now we can finish up and force ourselves to not healthy.
agent.terminateHealthChecks()
})
t.Start(func() {
agent.runHealthCheck()
})
t.Trigger()
}