Add new native HA feature

internal/ha/ha.go

@@ -0,0 +1,63 @@
+/*
+© Copyright IBM Corporation 2020
+
+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.
+*/
+
+// Package ha contains code for high availability
+package ha
+
+import (
+	"os"
+
+	"github.com/ibm-messaging/mq-container/internal/mqtemplate"
+	"github.com/ibm-messaging/mq-container/pkg/logger"
+)
+
+// ConfigureNativeHA configures native high availability
+func ConfigureNativeHA(log *logger.Logger) error {
+
+	file := "/etc/mqm/native-ha.ini"
+	templateFile := file + ".tpl"
+
+	templateMap := map[string]string{}
+	templateMap["Name"] = os.Getenv("HOSTNAME")
+	templateMap["NativeHAInstance0_Name"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_0_NAME")
+	templateMap["NativeHAInstance1_Name"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_1_NAME")
+	templateMap["NativeHAInstance2_Name"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_2_NAME")
+	templateMap["NativeHAInstance0_ReplicationAddress"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_0_REPLICATION_ADDRESS")
+	templateMap["NativeHAInstance1_ReplicationAddress"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_1_REPLICATION_ADDRESS")
+	templateMap["NativeHAInstance2_ReplicationAddress"] = os.Getenv("MQ_NATIVE_HA_INSTANCE_2_REPLICATION_ADDRESS")
+
+	if os.Getenv("MQ_NATIVE_HA_TLS") == "true" {
+		templateMap["CertificateLabel"] = os.Getenv("MQ_NATIVE_HA_TLS_CERTLABEL")
+
+		keyRepository, ok := os.LookupEnv("MQ_NATIVE_HA_KEY_REPOSITORY")
+		if !ok {
+			keyRepository = "/run/runmqserver/tls/key"
+		}
+		templateMap["KeyRepository"] = keyRepository
+
+		cipherSpec, ok := os.LookupEnv("MQ_NATIVE_HA_CIPHERSPEC")
+		if ok {
+			templateMap["CipherSpec"] = cipherSpec
+		}
+	}
+
+	err := mqtemplate.ProcessTemplateFile(templateFile, file, templateMap, log)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}