debian: Further improve the usage server package

We no longer symlink db.properties to the management server, but
we create a own db.properties for the usage server.

During a upgrade we copy the file to make the upgrade easier.

debian/cloudstack-usage.postinst

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+set -e
+
+case "$1" in
+    configure)
+        # We copy the db.properties file from the management server to the usage server
+        # This used to be a symlink, but we don't do that anymore
+        if [ -f "/etc/cloud/management/db.properties" ]; then
+            cp -a /etc/cloud/management/db.properties /etc/cloudstack/usage/db.properties
+        fi
+
+        # We also retain the log4j configuration
+        if [ -f "/etc/cloud/usage/log4j-cloud_usage.xml" ]; then
+            cp -a /etc/cloud/usage/log4j-cloud_usage.xml /etc/cloudstack/usage/log4j-cloud_usage.xml
+        fi
+        ;;
+esac
+
+exit 0

debian/rules

@@ -129,7 +129,6 @@ install:
 	install -D usage/target/cloud-usage-$(VERSION)-SNAPSHOT.jar $(DESTDIR)/usr/share/$(PACKAGE)-usage/lib/$(PACKAGE)-usage.jar
 	install -D usage/target/dependencies/* $(DESTDIR)/usr/share/$(PACKAGE)-usage/lib/
 	cp usage/target/transformed/* $(DESTDIR)/$(SYSCONFDIR)/$(PACKAGE)/usage/
-	ln -s ../management/db.properties $(DESTDIR)/$(SYSCONFDIR)/$(PACKAGE)/usage/db.properties
 	install -D packaging/debian/init/cloud-usage $(DESTDIR)/$(SYSCONFDIR)/init.d/$(PACKAGE)-usage
 
 	# cloudstack-awsapi

usage/conf/db.properties.in

@@ -0,0 +1,12 @@
+# usage database settings
+db.usage.username=@DBUSER@
+db.usage.password=@DBPW@
+db.usage.host=@DBHOST@
+db.usage.port=3306
+db.usage.name=cloud_usage
+
+# usage database tuning parameters
+db.usage.maxActive=100
+db.usage.maxIdle=30
+db.usage.maxWait=10000
+db.usage.autoReconnect=true