first commit

cmd/chkmqready/main.go

@@ -0,0 +1,88 @@
+/*
+© Copyright IBM Corporation 2017, 2024
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// chkmqready checks that MQ is ready for work, by checking if the MQ listener port is available
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"os/signal"
+
+	"github.com/ibm-messaging/mq-container/internal/ready"
+	"github.com/ibm-messaging/mq-container/pkg/name"
+)
+
+func doMain() int {
+	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
+	defer cancel()
+
+	// Check if runmqserver has indicated that it's finished configuration
+	r, err := ready.Check()
+	if !r || err != nil {
+		return 1
+	}
+	name, err := name.GetQueueManagerName()
+	if err != nil {
+		fmt.Println(err)
+		return 1
+	}
+
+	// Check if the queue manager has a running listener
+	status, err := ready.Status(ctx, name)
+	if err != nil {
+		return 1
+	}
+	switch status {
+	case ready.StatusActiveQM:
+		portOpen, err := checkPort("127.0.0.1:1414")
+		if err != nil {
+			fmt.Println(err)
+		}
+		if !portOpen {
+			return 1
+		}
+		return 0
+	case ready.StatusRecoveryQM:
+		fmt.Printf("Detected queue manager running as recovery leader")
+		return 0
+	case ready.StatusStandbyQM:
+		fmt.Printf("Detected queue manager running in standby mode")
+		return 10
+	case ready.StatusReplicaQM:
+		fmt.Printf("Detected queue manager running in replica mode")
+		return 20
+	default:
+		return 1
+	}
+}
+
+func main() {
+	os.Exit(doMain())
+}
+
+func checkPort(address string) (portOpen bool, err error) {
+	var conn net.Conn
+	conn, err = net.Dial("tcp", address)
+	if err != nil {
+		return
+	}
+	portOpen = true
+	err = conn.Close()
+	return
+}