[#956] node: Allow to reload goroutine pool sizes

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

cmd/frostfs-node/config.go

@@ -1235,6 +1235,7 @@ func (c *cfg) reloadConfig(ctx context.Context) {
 		setRuntimeParameters(c)
 		return nil
 	}})
+	components = append(components, dCmp{"pools", c.reloadPools})
 	components = append(components, dCmp{"tracing", func() error {
 		updated, err := tracing.Setup(ctx, *tracingconfig.ToTracingConfig(c.appCfg))
 		if updated {
@@ -1279,6 +1280,28 @@ func (c *cfg) reloadConfig(ctx context.Context) {
 	c.log.Info(logs.FrostFSNodeConfigurationHasBeenReloadedSuccessfully)
 }
 
+func (c *cfg) reloadPools() error {
+	newSize := objectconfig.Put(c.appCfg).PoolSizeLocal()
+	c.reloadPool(c.cfgObject.pool.putLocal, newSize, "object.put.local_pool_size")
+
+	newSize = objectconfig.Put(c.appCfg).PoolSizeRemote()
+	c.reloadPool(c.cfgObject.pool.putRemote, newSize, "object.put.remote_pool_size")
+
+	newSize = replicatorconfig.PoolSize(c.appCfg)
+	c.reloadPool(c.cfgObject.pool.replication, newSize, "replicator.pool_size")
+
+	return nil
+}
+
+func (c *cfg) reloadPool(p *ants.Pool, newSize int, name string) {
+	oldSize := p.Cap()
+	if oldSize != newSize {
+		c.log.Info(logs.FrostFSNodePoolConfigurationUpdate, zap.String("field", name),
+			zap.Int("old", oldSize), zap.Int("new", newSize))
+		p.Tune(newSize)
+	}
+}
+
 func (c *cfg) reloadAppConfig() error {
 	unlock := c.LockAppConfigExclusive()
 	defer unlock()

internal/logs/logs.go

@@ -451,6 +451,7 @@ const (
 	FrostFSNodeLoggerConfigurationPreparation                               = "logger configuration preparation"
 	FrostFSNodeTracingConfigationUpdated                                    = "tracing configation updated"
 	FrostFSNodeStorageEngineConfigurationUpdate                             = "storage engine configuration update"
+	FrostFSNodePoolConfigurationUpdate                                      = "adjust pool configuration"
 	FrostFSNodeUpdatedConfigurationApplying                                 = "updated configuration applying"
 	FrostFSNodeConfigurationHasBeenReloadedSuccessfully                     = "configuration has been reloaded successfully"
 	FrostFSNodeReadNewlyCreatedContainerAfterTheNotification                = "read newly created container after the notification"