[#49] node: React on SIGHUP only when node in READY state

Add more info in logs when node is going to shut down,
but initialization process still in progress.

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

cmd/frostfs-node/config.go

@@ -1040,7 +1040,6 @@ func (c *cfg) signalWatcher(ctx context.Context) {
 				c.reloadConfig(ctx)
 			case syscall.SIGTERM, syscall.SIGINT:
 				c.log.Info(logs.FrostFSNodeTerminationSignalHasBeenReceivedStopping)
-				// TODO (@acid-ant): #49 need to cover case when stuck at the middle(node health UNDEFINED or STARTING)
 
 				c.shutdown()
 
@@ -1062,6 +1061,12 @@ func (c *cfg) signalWatcher(ctx context.Context) {
 func (c *cfg) reloadConfig(ctx context.Context) {
 	c.log.Info(logs.FrostFSNodeSIGHUPHasBeenReceivedRereadingConfiguration)
 
+	if !c.compareAndSwapHealthStatus(control.HealthStatus_READY, control.HealthStatus_RECONFIGURING) {
+		c.log.Info(logs.FrostFSNodeSIGHUPSkip)
+		return
+	}
+	defer c.compareAndSwapHealthStatus(control.HealthStatus_RECONFIGURING, control.HealthStatus_READY)
+
 	err := c.readConfig(c.appCfg)
 	if err != nil {
 		c.log.Error(logs.FrostFSNodeConfigurationReading, zap.Error(err))
@@ -1142,7 +1147,14 @@ func (c *cfg) createTombstoneSource() *tombstone.ExpirationChecker {
 }
 
 func (c *cfg) shutdown() {
-	c.setHealthStatus(control.HealthStatus_SHUTTING_DOWN)
+	old := c.swapHealthStatus(control.HealthStatus_SHUTTING_DOWN)
+	if old == control.HealthStatus_SHUTTING_DOWN {
+		c.log.Info(logs.FrostFSNodeShutdownSkip)
+		return
+	}
+	if old == control.HealthStatus_STARTING {
+		c.log.Warn(logs.FrostFSNodeShutdownWhenNotReady)
+	}
 
 	c.ctxCancel()
 	c.done <- struct{}{}

cmd/frostfs-node/control.go

@@ -83,10 +83,20 @@ func (c *cfg) NetmapStatus() control.NetmapStatus {
 
 func (c *cfg) setHealthStatus(st control.HealthStatus) {
 	c.healthStatus.Store(int32(st))
+	c.metricsCollector.State().SetHealth(int32(st))
+}
 
-	if c.metricsCollector != nil {
-		c.metricsCollector.State().SetHealth(int32(st))
+func (c *cfg) compareAndSwapHealthStatus(oldSt, newSt control.HealthStatus) (swapped bool) {
+	if swapped = c.healthStatus.CompareAndSwap(int32(oldSt), int32(newSt)); swapped {
+		c.metricsCollector.State().SetHealth(int32(newSt))
 	}
+	return
+}
+
+func (c *cfg) swapHealthStatus(st control.HealthStatus) (old control.HealthStatus) {
+	old = control.HealthStatus(c.healthStatus.Swap(int32(st)))
+	c.metricsCollector.State().SetHealth(int32(st))
+	return
 }
 
 func (c *cfg) HealthStatus() control.HealthStatus {

cmd/frostfs-node/main.go

@@ -60,13 +60,13 @@ func main() {
 	var ctx context.Context
 	ctx, c.ctxCancel = context.WithCancel(context.Background())
 
-	initApp(ctx, c)
-
 	c.setHealthStatus(control.HealthStatus_STARTING)
 
+	initApp(ctx, c)
+
 	bootUp(ctx, c)
 
-	c.setHealthStatus(control.HealthStatus_READY)
+	c.compareAndSwapHealthStatus(control.HealthStatus_STARTING, control.HealthStatus_READY)
 
 	wait(c)
 }

internal/logs/logs.go

@@ -436,6 +436,9 @@ const (
 	FrostFSNodeInternalApplicationError                                     = "internal application error"
 	FrostFSNodeInternalErrorProcessingIsComplete                            = "internal error processing is complete"
 	FrostFSNodeSIGHUPHasBeenReceivedRereadingConfiguration                  = "SIGHUP has been received, rereading configuration..."
+	FrostFSNodeSIGHUPSkip                                                   = "node not ready for reconfiguration, skipped SIGHUP"
+	FrostFSNodeShutdownSkip                                                 = "node already is going to shutting down, skipped shutdown"
+	FrostFSNodeShutdownWhenNotReady                                         = "node is going to shutting down when subsystems still initializing"
 	FrostFSNodeConfigurationReading                                         = "configuration reading"
 	FrostFSNodeLoggerConfigurationPreparation                               = "logger configuration preparation"
 	FrostFSNodeTracingConfigationUpdated                                    = "tracing configation updated"

pkg/services/control/types.proto

@@ -115,6 +115,9 @@ enum HealthStatus {
 
     // Storage node application is shutting down.
     SHUTTING_DOWN = 3;
+
+    // Storage node application is reconfiguring.
+    RECONFIGURING = 4;
 }
 
 // Shard description.