backport of commit ca9e08e6b5eee00d055b9429df5976a70cdcb2d6 (#18813)

Co-authored-by: James Rasell <jrasell@users.noreply.github.com>

.changelog/18795.txt

@@ -0,0 +1,12 @@
+```release-note:improvement
+cli: Added `log-include-location` flag to the `monitor` command
+```
+
+```release-note:improvement
+cli: Added `log-include-location` flag to the `operator debug` command
+```
+
+```release-note:improvement
+api: Added support for the `log_include_location` query parameter within the
+`/v1/agent/monitor` HTTP endpoint
+```

client/agent_endpoint.go

@@ -119,8 +119,9 @@ func (a *Agent) monitor(conn io.ReadWriteCloser) {
 	defer cancel()
 
 	monitor := monitor.New(512, a.c.logger, &log.LoggerOptions{
-		JSONFormat: args.LogJSON,
-		Level:      logLevel,
+		JSONFormat:      args.LogJSON,
+		Level:           logLevel,
+		IncludeLocation: args.LogIncludeLocation,
 	})
 
 	frames := make(chan *sframer.StreamFrame, streamFramesBuffer)

client/structs/structs.go

@@ -45,6 +45,11 @@ type MonitorRequest struct {
 	// LogJSON specifies if log format should be unstructured or json
 	LogJSON bool
 
+	// LogIncludeLocation dictates whether the logger includes file and line
+	// information on each log line. This is useful for Nomad development and
+	// debugging.
+	LogIncludeLocation bool
+
 	// NodeID is the node we want to track the logs of
 	NodeID string
 

command/agent/agent_endpoint.go

@@ -179,14 +179,26 @@ func (s *HTTPServer) AgentMonitor(resp http.ResponseWriter, req *http.Request) (
 		plainText = parsed
 	}
 
+	logIncludeLocation := false
+	logIncludeLocationStr := req.URL.Query().Get("log_include_location")
+	if logIncludeLocationStr != "" {
+		parsed, err := strconv.ParseBool(logIncludeLocationStr)
+		if err != nil {
+			return nil, CodedError(http.StatusBadRequest,
+				fmt.Sprintf("Unknown option for log_include_location: %v", err))
+		}
+		logIncludeLocation = parsed
+	}
+
 	nodeID := req.URL.Query().Get("node_id")
 	// Build the request and parse the ACL token
 	args := cstructs.MonitorRequest{
-		NodeID:    nodeID,
-		ServerID:  req.URL.Query().Get("server_id"),
-		LogLevel:  logLevel,
-		LogJSON:   logJSON,
-		PlainText: plainText,
+		NodeID:             nodeID,
+		ServerID:           req.URL.Query().Get("server_id"),
+		LogLevel:           logLevel,
+		LogJSON:            logJSON,
+		LogIncludeLocation: logIncludeLocation,
+		PlainText:          plainText,
 	}
 
 	// if node and server were requested return error

command/agent/agent_endpoint_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/hashicorp/nomad/nomad/mock"
 	"github.com/hashicorp/nomad/nomad/structs"
 	"github.com/hashicorp/nomad/testutil"
+	"github.com/shoenig/test/must"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -293,6 +294,18 @@ func TestHTTP_AgentMonitor(t *testing.T) {
 		})
 	})
 
+	t.Run("unknown log_include_location", func(t *testing.T) {
+		httpTest(t, nil, func(s *TestAgent) {
+			req, err := http.NewRequest(http.MethodGet, "/v1/agent/monitor?log_include_location=maybe", nil)
+			must.NoError(t, err)
+			resp := newClosableRecorder()
+
+			// Make the request
+			_, err = s.Server.AgentMonitor(resp, req)
+			must.Eq(t, http.StatusBadRequest, err.(HTTPCodedError).Code())
+		})
+	})
+
 	t.Run("check for specific log level", func(t *testing.T) {
 		httpTest(t, nil, func(s *TestAgent) {
 			req, err := http.NewRequest(http.MethodGet, "/v1/agent/monitor?log_level=warn", nil)

command/agent_monitor.go

@@ -19,6 +19,13 @@ import (
 
 type MonitorCommand struct {
 	Meta
+
+	// Below this point is where CLI flag options are stored.
+	logLevel           string
+	nodeID             string
+	serverID           string
+	logJSON            bool
+	logIncludeLocation bool
 }
 
 func (c *MonitorCommand) Help() string {
@@ -42,6 +49,9 @@ Monitor Specific Options:
   -log-level <level>
     Sets the log level to monitor (default: INFO)
 
+  -log-include-location
+    Include file and line information in each log line. The default is false.
+
   -node-id <node-id>
     Sets the specific node to monitor
 
@@ -68,17 +78,13 @@ func (c *MonitorCommand) Run(args []string) int {
 		Ui:           c.Ui,
 	}
 
-	var logLevel string
-	var nodeID string
-	var serverID string
-	var logJSON bool
-
 	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
 	flags.Usage = func() { c.Ui.Output(c.Help()) }
-	flags.StringVar(&logLevel, "log-level", "", "")
-	flags.StringVar(&nodeID, "node-id", "", "")
-	flags.StringVar(&serverID, "server-id", "", "")
-	flags.BoolVar(&logJSON, "json", false, "")
+	flags.StringVar(&c.logLevel, "log-level", "", "")
+	flags.BoolVar(&c.logIncludeLocation, "log-include-location", false, "")
+	flags.StringVar(&c.nodeID, "node-id", "", "")
+	flags.StringVar(&c.serverID, "server-id", "", "")
+	flags.BoolVar(&c.logJSON, "json", false, "")
 
 	if err := flags.Parse(args); err != nil {
 		return 1
@@ -99,8 +105,8 @@ func (c *MonitorCommand) Run(args []string) int {
 	}
 
 	// Query the node info and lookup prefix
-	if nodeID != "" {
-		nodeID, err = lookupNodeID(client.Nodes(), nodeID)
+	if c.nodeID != "" {
+		c.nodeID, err = lookupNodeID(client.Nodes(), c.nodeID)
 		if err != nil {
 			c.Ui.Error(err.Error())
 			return 1
@@ -108,10 +114,11 @@ func (c *MonitorCommand) Run(args []string) int {
 	}
 
 	params := map[string]string{
-		"log_level": logLevel,
-		"node_id":   nodeID,
-		"server_id": serverID,
-		"log_json":  strconv.FormatBool(logJSON),
+		"log_level":            c.logLevel,
+		"node_id":              c.nodeID,
+		"server_id":            c.serverID,
+		"log_json":             strconv.FormatBool(c.logJSON),
+		"log_include_location": strconv.FormatBool(c.logIncludeLocation),
 	}
 
 	query := &api.QueryOptions{

command/agent_monitor_test.go

@@ -42,4 +42,13 @@ func TestMonitorCommand_Fails(t *testing.T) {
 
 	out = ui.ErrorWriter.String()
 	must.StrContains(t, out, "No node(s) with prefix")
+
+	ui.ErrorWriter.Reset()
+
+	// Fails on passing a log-include-location flag which cannot be parsed.
+	code = cmd.Run([]string{"-address=" + url, "-log-include-location=maybe"})
+	must.One(t, code)
+
+	out = ui.ErrorWriter.String()
+	must.StrContains(t, out, `invalid boolean value "maybe" for -log-include-location`)
 }

command/operator_debug.go

@@ -39,28 +39,29 @@ import (
 type OperatorDebugCommand struct {
 	Meta
 
-	timestamp     string
-	collectDir    string
-	duration      time.Duration
-	interval      time.Duration
-	pprofInterval time.Duration
-	pprofDuration time.Duration
-	logLevel      string
-	maxNodes      int
-	nodeClass     string
-	nodeIDs       []string
-	serverIDs     []string
-	topics        map[api.Topic][]string
-	index         uint64
-	consul        *external
-	vault         *external
-	manifest      []string
-	ctx           context.Context
-	cancel        context.CancelFunc
-	opts          *api.QueryOptions
-	verbose       bool
-	members       *api.ServerMembers
-	nodes         []*api.NodeListStub
+	timestamp          string
+	collectDir         string
+	duration           time.Duration
+	interval           time.Duration
+	pprofInterval      time.Duration
+	pprofDuration      time.Duration
+	logLevel           string
+	logIncludeLocation bool
+	maxNodes           int
+	nodeClass          string
+	nodeIDs            []string
+	serverIDs          []string
+	topics             map[api.Topic][]string
+	index              uint64
+	consul             *external
+	vault              *external
+	manifest           []string
+	ctx                context.Context
+	cancel             context.CancelFunc
+	opts               *api.QueryOptions
+	verbose            bool
+	members            *api.ServerMembers
+	nodes              []*api.NodeListStub
 }
 
 const (
@@ -178,6 +179,10 @@ Debug Options:
   -log-level=<level>
     The log level to monitor. Defaults to DEBUG.
 
+  -log-include-location
+    Include file and line information in each log line monitored. The default
+    is true.
+
   -max-nodes=<count>
     Cap the maximum number of client nodes included in the capture. Defaults
     to 10, set to 0 for unlimited.
@@ -225,20 +230,21 @@ func (c *OperatorDebugCommand) Synopsis() string {
 func (c *OperatorDebugCommand) AutocompleteFlags() complete.Flags {
 	return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
 		complete.Flags{
-			"-duration":       complete.PredictAnything,
-			"-event-index":    complete.PredictAnything,
-			"-event-topic":    complete.PredictAnything,
-			"-interval":       complete.PredictAnything,
-			"-log-level":      complete.PredictSet("TRACE", "DEBUG", "INFO", "WARN", "ERROR"),
-			"-max-nodes":      complete.PredictAnything,
-			"-node-class":     NodeClassPredictor(c.Client),
-			"-node-id":        NodePredictor(c.Client),
-			"-server-id":      ServerPredictor(c.Client),
-			"-output":         complete.PredictDirs("*"),
-			"-pprof-duration": complete.PredictAnything,
-			"-consul-token":   complete.PredictAnything,
-			"-vault-token":    complete.PredictAnything,
-			"-verbose":        complete.PredictAnything,
+			"-duration":             complete.PredictAnything,
+			"-event-index":          complete.PredictAnything,
+			"-event-topic":          complete.PredictAnything,
+			"-interval":             complete.PredictAnything,
+			"-log-level":            complete.PredictSet("TRACE", "DEBUG", "INFO", "WARN", "ERROR"),
+			"-log-include-location": complete.PredictAnything,
+			"-max-nodes":            complete.PredictAnything,
+			"-node-class":           NodeClassPredictor(c.Client),
+			"-node-id":              NodePredictor(c.Client),
+			"-server-id":            ServerPredictor(c.Client),
+			"-output":               complete.PredictDirs("*"),
+			"-pprof-duration":       complete.PredictAnything,
+			"-consul-token":         complete.PredictAnything,
+			"-vault-token":          complete.PredictAnything,
+			"-verbose":              complete.PredictAnything,
 		})
 }
 
@@ -358,6 +364,7 @@ func (c *OperatorDebugCommand) Run(args []string) int {
 	flags.StringVar(&eventTopic, "event-topic", "none", "")
 	flags.StringVar(&interval, "interval", "30s", "")
 	flags.StringVar(&c.logLevel, "log-level", "DEBUG", "")
+	flags.BoolVar(&c.logIncludeLocation, "log-include-location", true, "")
 	flags.IntVar(&c.maxNodes, "max-nodes", 10, "")
 	flags.StringVar(&c.nodeClass, "node-class", "", "")
 	flags.StringVar(&nodeIDs, "node-id", "all", "")
@@ -769,8 +776,9 @@ func (c *OperatorDebugCommand) startMonitor(path, idKey, nodeID string, client *
 
 	qo := api.QueryOptions{
 		Params: map[string]string{
-			idKey:       nodeID,
-			"log_level": c.logLevel,
+			idKey:                  nodeID,
+			"log_level":            c.logLevel,
+			"log_include_location": strconv.FormatBool(c.logIncludeLocation),
 		},
 		AllowStale: c.queryOpts().AllowStale,
 	}

nomad/client_agent_endpoint.go

@@ -198,8 +198,9 @@ func (a *Agent) monitor(conn io.ReadWriteCloser) {
 	defer cancel()
 
 	monitor := monitor.New(512, a.srv.logger, &log.LoggerOptions{
-		Level:      logLevel,
-		JSONFormat: args.LogJSON,
+		Level:           logLevel,
+		JSONFormat:      args.LogJSON,
+		IncludeLocation: args.LogIncludeLocation,
 	})
 
 	frames := make(chan *sframer.StreamFrame, 32)

website/content/api-docs/agent.mdx

@@ -605,6 +605,9 @@ The table below shows this endpoint's support for
 - `log_json` `(bool: false)` - Specifies if the log format for streamed logs
   should be JSON.
 
+- `log_include_location` `(bool: false)` - Specifies if the logs streamed should
+  include file and line information.
+
 - `node_id` `(string: "a57b2adb-1a30-2dda-8df0-25abb0881952")` - Specifies a text
   string containing a node-id to target for streaming.
 

website/content/docs/commands/monitor.mdx

@@ -36,6 +36,9 @@ capability.
 - `-log-level`: The log level to use for log streaming. Defaults to `info`.
   Possible values include `trace`, `debug`, `info`, `warn`, `error`
 
+- `-log-include-location`: Include file and line information in each log line.
+  The default is `false`.
+
 - `-node-id`: Specifies the client node-id to stream logs from. If no
   node-id is given the nomad server from the -address flag will be used.
 

website/content/docs/commands/operator/debug.mdx

@@ -55,6 +55,9 @@ true.
 
 - `-log-level=DEBUG`: The log level to monitor. Defaults to `DEBUG`.
 
+- `-log-include-location`: Include file and line information in each log line
+  monitored. The default is `true`.
+
 - `-max-nodes=<count>`: Cap the maximum number of client nodes included
   in the capture. Defaults to 10, set to 0 for unlimited.