send tags and environment with persist module config

mig-agent/persist.go

@@ -205,7 +205,8 @@ func managePersistModule(ctx *Context, name string) {
 
 			// The module is now running, send any configuration parameters we have
 			// to it.
-			cm, err := modules.MakeMessageConfig(cfg)
+			cm, err := modules.MakeMessageConfig(cfg, ctx.Agent.Hostname,
+				ctx.Agent.Env, ctx.Agent.Tags)
 			if err != nil {
 				// This should never happen, but if it does we will just
 				// kill the executing module as we are unable to send any

modules/audit/audit.go

@@ -48,13 +48,18 @@ func buildResults(e elements, r *modules.Result) (buf []byte, err error) {
 var logChan chan string
 var alertChan chan string
 var handlerErrChan chan error
-var configChan chan []byte
+var configChan chan modules.ConfigParams
 
 func moduleMain() {
 	var cfg config
 
 	incfg := <-configChan
-	err := json.Unmarshal(incfg, &cfg)
+	buf, err := json.Marshal(incfg.Config)
+	if err != nil {
+		handlerErrChan <- err
+		return
+	}
+	err = json.Unmarshal(buf, &cfg)
 	if err != nil {
 		handlerErrChan <- err
 		return
@@ -111,7 +116,7 @@ func (r *run) RunPersist(in modules.ModuleReader, out modules.ModuleWriter) {
 	logChan = make(chan string, 64)
 	regChan := make(chan string, 64)
 	handlerErrChan = make(chan error, 64)
-	configChan = make(chan []byte, 1)
+	configChan = make(chan modules.ConfigParams, 1)
 
 	go moduleMain()
 	l, spec, err := modules.GetPersistListener("audit")

modules/dispatch/dispatch.go

@@ -48,7 +48,7 @@ func buildResults(e elements, r *modules.Result) (buf []byte, err error) {
 var logChan chan string
 var alertChan chan string
 var handlerErrChan chan error
-var configChan chan []byte
+var configChan chan modules.ConfigParams
 
 // messageBuf is a queue used to store incoming messages, and is drained by
 // runDispatch
@@ -58,7 +58,12 @@ func moduleMain() {
 	var cfg config
 
 	incfg := <-configChan
-	err := json.Unmarshal(incfg, &cfg)
+	buf, err := json.Marshal(incfg.Config)
+	if err != nil {
+		handlerErrChan <- err
+		return
+	}
+	err = json.Unmarshal(buf, &cfg)
 	if err != nil {
 		handlerErrChan <- err
 		return
@@ -140,7 +145,7 @@ func (r *run) RunPersist(in modules.ModuleReader, out modules.ModuleWriter) {
 	logChan = make(chan string, 64)
 	regChan := make(chan string, 64)
 	handlerErrChan = make(chan error, 64)
-	configChan = make(chan []byte, 1)
+	configChan = make(chan modules.ConfigParams, 1)
 
 	go moduleMain()
 	l, spec, err := modules.GetPersistListener("dispatch")

modules/examplepersist/examplepersist.go

@@ -67,8 +67,8 @@ var alertChan chan string
 var handlerErrChan chan error
 
 // When the agent sends the persistent module it's configuration, it will come in via
-// the config channel as a JSON byte slice so we can unmarshal it into our configuration
-var configChan chan []byte
+// the config channel as a ConfigParams type so we can load it into our configuration
+var configChan chan modules.ConfigParams
 
 // An example background task the module will execute while it is being supervised by
 // the agent. This example just logs the current time up to the agent every 30
@@ -81,7 +81,12 @@ func runSomeTasks() {
 	// which we can read immediately here. The configuration will come in via
 	// configChan as a JSON document, which we unmarshal into our config struct.
 	incfg := <-configChan
-	err := json.Unmarshal(incfg, &cfg)
+	buf, err := json.Marshal(incfg.Config)
+	if err != nil {
+		handlerErrChan <- err
+		return
+	}
+	err = json.Unmarshal(buf, &cfg)
 	if err != nil {
 		handlerErrChan <- err
 		return
@@ -178,7 +183,7 @@ func (r *run) RunPersist(in modules.ModuleReader, out modules.ModuleWriter) {
 	// and the module to exit.
 	handlerErrChan = make(chan error, 64)
 	// Create a config channel we will read our configuration from.
-	configChan = make(chan []byte, 1)
+	configChan = make(chan modules.ConfigParams, 1)
 	// Initialize the alert channel
 	alertChan = make(chan string, 64)
 	// Start up an example background task we want our module to run

modules/fswatch/fswatch.go

@@ -41,7 +41,7 @@ func buildResults(e elements, r *modules.Result) (buf []byte, err error) {
 var logChan chan string
 var agentAlertChan chan string
 var handlerErrChan chan error
-var configChan chan []byte
+var configChan chan modules.ConfigParams
 
 var alertChan chan Alert
 
@@ -95,7 +95,12 @@ func moduleMain() {
 	alertChan = make(chan Alert, 16)
 
 	incfg := <-configChan
-	err := json.Unmarshal(incfg, &cfg)
+	buf, err := json.Marshal(incfg.Config)
+	if err != nil {
+		handlerErrChan <- err
+		return
+	}
+	err = json.Unmarshal(buf, &cfg)
 	if err != nil {
 		handlerErrChan <- err
 		return
@@ -143,7 +148,7 @@ func (r *run) RunPersist(in modules.ModuleReader, out modules.ModuleWriter) {
 	agentAlertChan = make(chan string, 64)
 	regChan := make(chan string, 64)
 	handlerErrChan = make(chan error, 64)
-	configChan = make(chan []byte, 1)
+	configChan = make(chan modules.ConfigParams, 1)
 
 	go moduleMain()
 	l, spec, err := modules.GetPersistListener("fswatch")

modules/modules.go

@@ -64,7 +64,10 @@ type RegParams struct {
 }
 
 type ConfigParams struct {
-	Config interface{} `json:"config"`
+	Config   interface{}       `json:"config"`
+	Hostname string            `json:"hostname"`
+	Env      interface{}       `json:"environment"`
+	Tags     map[string]string `json:"tags"`
 }
 
 // AlertParams describes the parameters used in an alert message
@@ -206,8 +209,14 @@ func MakeMessageRegister(spec string) (rawMsg []byte, err error) {
 }
 
 // Creates a new message of class config.
-func MakeMessageConfig(cfgdata interface{}) (rawMsg []byte, err error) {
-	param := ConfigParams{Config: cfgdata}
+func MakeMessageConfig(cfgdata interface{}, hostname string, env interface{},
+	tags map[string]string) (rawMsg []byte, err error) {
+	param := ConfigParams{
+		Config:   cfgdata,
+		Hostname: hostname,
+		Env:      env,
+		Tags:     tags,
+	}
 	msg := Message{Class: MsgClassConfig, Parameters: param}
 	rawMsg, err = json.Marshal(&msg)
 	if err != nil {
@@ -377,7 +386,7 @@ func RegisterDispatchFunction(f func(string)) {
 // RunPersist function. Looks after replying to ping messages, writing logs, and other
 // communication between the agent and the running persistent module.
 func DefaultPersistHandlers(in ModuleReader, out ModuleWriter, logch chan string,
-	errch chan error, regch chan string, alertch chan string, confch chan []byte) {
+	errch chan error, regch chan string, alertch chan string, confch chan ConfigParams) {
 	inChan := make(chan Message, 0)
 	go func() {
 		for {
@@ -470,12 +479,7 @@ func DefaultPersistHandlers(in ModuleReader, out ModuleWriter, logch chan string
 					failed = true
 					break
 				}
-				buf, err = json.Marshal(confparam.Config)
-				if err != nil {
-					failed = true
-					break
-				}
-				confch <- buf
+				confch <- confparam
 			case "alert":
 				if dispatchFunc != nil {
 					var alparam AlertParams