Allow logging targets to be configured to receive minio (#8347)

specific errors, `application` errors or `all` by default.

console logging on server by default lists all logs -
enhance admin console API to accept `type` as query parameter to
subscribe to application/minio logs.

pkg/event/target/amqp.go

@@ -76,7 +76,7 @@ type AMQPTarget struct {
 	conn       *amqp.Connection
 	connMutex  sync.Mutex
 	store      Store
-	loggerOnce func(ctx context.Context, err error, id interface{})
+	loggerOnce func(ctx context.Context, err error, id interface{}, errKind ...interface{})
 }
 
 // ID - returns TargetID.
@@ -215,7 +215,7 @@ func (target *AMQPTarget) Close() error {
 }
 
 // NewAMQPTarget - creates new AMQP target.
-func NewAMQPTarget(id string, args AMQPArgs, doneCh <-chan struct{}, loggerOnce func(ctx context.Context, err error, id interface{})) (*AMQPTarget, error) {
+func NewAMQPTarget(id string, args AMQPArgs, doneCh <-chan struct{}, loggerOnce func(ctx context.Context, err error, id interface{}, errKind ...interface{})) (*AMQPTarget, error) {
 	var conn *amqp.Connection
 	var err error
 

pkg/event/target/redis.go

@@ -99,7 +99,7 @@ type RedisTarget struct {
 	pool       *redis.Pool
 	store      Store
 	firstPing  bool
-	loggerOnce func(ctx context.Context, err error, id interface{})
+	loggerOnce func(ctx context.Context, err error, id interface{}, errKind ...interface{})
 }
 
 // ID - returns target ID.
@@ -222,7 +222,7 @@ func (target *RedisTarget) Close() error {
 }
 
 // NewRedisTarget - creates new Redis target.
-func NewRedisTarget(id string, args RedisArgs, doneCh <-chan struct{}, loggerOnce func(ctx context.Context, err error, id interface{})) (*RedisTarget, error) {
+func NewRedisTarget(id string, args RedisArgs, doneCh <-chan struct{}, loggerOnce func(ctx context.Context, err error, id interface{}, errKind ...interface{})) (*RedisTarget, error) {
 	pool := &redis.Pool{
 		MaxIdle:     3,
 		IdleTimeout: 2 * 60 * time.Second,

pkg/madmin/api-log.go

@@ -35,12 +35,14 @@ type LogInfo struct {
 }
 
 // SendLog returns true if log pertains to node specified in args.
-func (l LogInfo) SendLog(node string) bool {
-	return node == "" || strings.EqualFold(node, l.NodeName)
+func (l LogInfo) SendLog(node, logKind string) bool {
+	nodeFltr := (node == "" || strings.EqualFold(node, l.NodeName))
+	typeFltr := strings.EqualFold(logKind, "all") || strings.EqualFold(l.LogKind, logKind)
+	return nodeFltr && typeFltr
 }
 
 // GetLogs - listen on console log messages.
-func (adm AdminClient) GetLogs(node string, lineCnt int, doneCh <-chan struct{}) <-chan LogInfo {
+func (adm AdminClient) GetLogs(node string, lineCnt int, logKind string, doneCh <-chan struct{}) <-chan LogInfo {
 	logCh := make(chan LogInfo, 1)
 
 	// Only success, start a routine to start reading line by line.
@@ -49,6 +51,7 @@ func (adm AdminClient) GetLogs(node string, lineCnt int, doneCh <-chan struct{})
 		urlValues := make(url.Values)
 		urlValues.Set("node", node)
 		urlValues.Set("limit", strconv.Itoa(lineCnt))
+		urlValues.Set("logType", logKind)
 		for {
 			reqData := requestData{
 				relPath:     "/v1/log",