Do not skip good quality nodes after a bad quality node is encountered (

#9550)

(cherry picked from commit 3633853)

plugins/inputs/opcua/opcua_client.go

@@ -31,6 +31,7 @@ type OpcUA struct {
 	RequestTimeout config.Duration `toml:"request_timeout"`
 	RootNodes      []NodeSettings  `toml:"nodes"`
 	Groups         []GroupSettings `toml:"group"`
+	Log            telegraf.Logger `toml:"-"`
 
 	nodes       []Node
 	nodeData    []OPCData
@@ -470,15 +471,16 @@ func (o *OpcUA) getData() error {
 	}
 	o.ReadSuccess.Incr(1)
 	for i, d := range resp.Results {
+		o.nodeData[i].Quality = d.Status
 		if d.Status != ua.StatusOK {
-			return fmt.Errorf("status not OK: %v", d.Status)
+			o.Log.Errorf("status not OK for node %v: %v", o.nodes[i].tag.FieldName, d.Status)
+			continue
 		}
 		o.nodeData[i].TagName = o.nodes[i].tag.FieldName
 		if d.Value != nil {
 			o.nodeData[i].Value = d.Value.Value()
 			o.nodeData[i].DataType = d.Value.Type()
 		}
-		o.nodeData[i].Quality = d.Status
 		o.nodeData[i].TimeStamp = d.ServerTimestamp.String()
 		o.nodeData[i].Time = d.SourceTimestamp.String()
 	}
@@ -532,17 +534,19 @@ func (o *OpcUA) Gather(acc telegraf.Accumulator) error {
 	}
 
 	for i, n := range o.nodes {
-		fields := make(map[string]interface{})
-		tags := map[string]string{
-			"id": n.idStr,
-		}
-		for k, v := range n.metricTags {
-			tags[k] = v
-		}
+		if o.nodeData[i].Quality == ua.StatusOK {
+			fields := make(map[string]interface{})
+			tags := map[string]string{
+				"id": n.idStr,
+			}
+			for k, v := range n.metricTags {
+				tags[k] = v
+			}
 
-		fields[o.nodeData[i].TagName] = o.nodeData[i].Value
-		fields["Quality"] = strings.TrimSpace(fmt.Sprint(o.nodeData[i].Quality))
-		acc.AddFields(n.metricName, fields, tags)
+			fields[o.nodeData[i].TagName] = o.nodeData[i].Value
+			fields["Quality"] = strings.TrimSpace(fmt.Sprint(o.nodeData[i].Quality))
+			acc.AddFields(n.metricName, fields, tags)
+		}
 	}
 	return nil
 }

plugins/inputs/opcua/opcua_client_test.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/influxdata/telegraf/config"
+	"github.com/influxdata/telegraf/testutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -16,7 +17,7 @@ type OPCTags struct {
 	Namespace      string
 	IdentifierType string
 	Identifier     string
-	Want           string
+	Want           interface{}
 }
 
 func TestClient1Integration(t *testing.T) {
@@ -28,6 +29,8 @@ func TestClient1Integration(t *testing.T) {
 		{"ProductName", "0", "i", "2261", "open62541 OPC UA Server"},
 		{"ProductUri", "0", "i", "2262", "http://open62541.org"},
 		{"ManufacturerName", "0", "i", "2263", "open62541"},
+		{"badnode", "1", "i", "1337", nil},
+		{"goodnode", "1", "s", "the.answer", "42"},
 	}
 
 	var o OpcUA
@@ -40,6 +43,8 @@ func TestClient1Integration(t *testing.T) {
 	o.RequestTimeout = config.Duration(1 * time.Second)
 	o.SecurityPolicy = "None"
 	o.SecurityMode = "None"
+	o.Log = testutil.Logger{}
+
 	for _, tags := range testopctags {
 		o.RootNodes = append(o.RootNodes, MapOPCTag(tags))
 	}
@@ -60,7 +65,7 @@ func TestClient1Integration(t *testing.T) {
 			if compare != testopctags[i].Want {
 				t.Errorf("Tag %s: Values %v for type %s  does not match record", o.nodes[i].tag.FieldName, value.Interface(), types)
 			}
-		} else {
+		} else if testopctags[i].Want != nil {
 			t.Errorf("Tag: %s has value: %v", o.nodes[i].tag.FieldName, v.Value)
 		}
 	}
@@ -250,6 +255,7 @@ func TestValidateOPCTags(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			o := OpcUA{
 				nodes: tt.nodes,
+				Log:   testutil.Logger{},
 			}
 			require.Equal(t, tt.err, o.validateOPCTags())
 		})