feat(common.opcua): Add session timeout as configuration option (#15341)

plugins/common/opcua/client.go

@@ -51,6 +51,7 @@ type OpcUAClientConfig struct {
 
 	OptionalFields []string         `toml:"optional_fields"`
 	Workarounds    OpcUAWorkarounds `toml:"workarounds"`
+	SessionTimeout config.Duration  `toml:"session_timeout"`
 }
 
 func (o *OpcUAClientConfig) Validate() error {

plugins/common/opcua/opcua_util.go

@@ -159,6 +159,10 @@ func (o *OpcUAClient) generateClientOpts(endpoints []*ua.EndpointDescription) ([
 		opcua.RequestTimeout(time.Duration(o.Config.RequestTimeout)),
 	)
 
+	if o.Config.SessionTimeout != 0 {
+		opts = append(opts, opcua.SessionTimeout(time.Duration(o.Config.SessionTimeout)))
+	}
+
 	certFile := o.Config.Certificate
 	keyFile := o.Config.PrivateKey
 	policy := o.Config.SecurityPolicy

plugins/inputs/opcua/README.md

@@ -39,6 +39,9 @@ to use them.
   #
   ## Maximum time allowed for a request over the established connection.
   # request_timeout = "5s"
+
+  # Maximum time that a session shall remain open without activity.
+  # session_timeout = "20m"
   #
   ## Security policy, one of "None", "Basic128Rsa15", "Basic256",
   ## "Basic256Sha256", or "auto"

plugins/inputs/opcua/sample.conf

@@ -11,6 +11,9 @@
   #
   ## Maximum time allowed for a request over the established connection.
   # request_timeout = "5s"
+
+  # Maximum time that a session shall remain open without activity.
+  # session_timeout = "20m"
   #
   ## Security policy, one of "None", "Basic128Rsa15", "Basic256",
   ## "Basic256Sha256", or "auto"

plugins/inputs/opcua_listener/README.md

@@ -57,6 +57,9 @@ to use them.
   ## Maximum time allowed for a request over the established connection.
   # request_timeout = "5s"
   #
+  # Maximum time that a session shall remain open without activity.
+  # session_timeout = "20m"
+  #
   ## The interval at which the server should at least update its monitored items
   # subscription_interval = "100ms"
   #

plugins/inputs/opcua_listener/sample.conf

@@ -18,6 +18,9 @@
   ## Maximum time allowed for a request over the established connection.
   # request_timeout = "5s"
   #
+  # Maximum time that a session shall remain open without activity.
+  # session_timeout = "20m"
+  #
   ## The interval at which the server should at least update its monitored items
   # subscription_interval = "100ms"
   #