Dynamic loading of DB driver + support for other DB providers

build/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 AGENTLOGDIR=logs
 AGENTLOG=logs/agent.log
 MSMNTDIR=/mnt

client/tomcatconf/db.properties.in

@@ -25,6 +25,7 @@ region.id=1
 db.cloud.username=@DBUSER@
 db.cloud.password=@DBPW@
 db.cloud.host=@DBHOST@
+db.cloud.driver=@DBDRIVER@
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -56,6 +57,7 @@ db.cloud.encrypt.secret=
 db.usage.username=@DBUSER@
 db.usage.password=@DBPW@
 db.usage.host=@DBHOST@
+db.usage.driver=@DBDRIVER@
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -69,6 +71,7 @@ db.usage.url.params=
 db.simulator.username=@DBUSER@
 db.simulator.password=@DBPW@
 db.simulator.host=@DBHOST@
+db.simulator.driver=@DBDRIVER@
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

engine/storage/snapshot/test/resources/db.properties

@@ -26,6 +26,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -46,6 +47,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -59,6 +62,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

framework/db/src/com/cloud/utils/db/TransactionLegacy.java

@@ -20,6 +20,8 @@ import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
 import java.sql.Connection;
+import java.sql.Driver;
+import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -1024,6 +1026,7 @@ public class TransactionLegacy implements Closeable {
             final String cloudUsername = dbProps.getProperty("db.cloud.username");
             final String cloudPassword = dbProps.getProperty("db.cloud.password");
             final String cloudHost = dbProps.getProperty("db.cloud.host");
+            final String cloudDriver = dbProps.getProperty("db.cloud.driver");
             final int cloudPort = Integer.parseInt(dbProps.getProperty("db.cloud.port"));
             final String cloudDbName = dbProps.getProperty("db.cloud.name");
             final boolean cloudAutoReconnect = Boolean.parseBoolean(dbProps.getProperty("db.cloud.autoReconnect"));
@@ -1072,10 +1075,12 @@ public class TransactionLegacy implements Closeable {
                     new GenericObjectPool(null, cloudMaxActive, GenericObjectPool.DEFAULT_WHEN_EXHAUSTED_ACTION, cloudMaxWait, cloudMaxIdle, cloudTestOnBorrow, false,
                             cloudTimeBtwEvictionRunsMillis, 1, cloudMinEvcitableIdleTimeMillis, cloudTestWhileIdle);
 
-            final ConnectionFactory cloudConnectionFactory =
+            final String cloudConnectionUri = cloudDriver + "://" + cloudHost + (s_dbHAEnabled ? "," + cloudSlaves : "") + ":" + cloudPort + "/" + cloudDbName +
-                    new DriverManagerConnectionFactory("jdbc:mysql://" + cloudHost + (s_dbHAEnabled ? "," + cloudSlaves : "") + ":" + cloudPort + "/" + cloudDbName +
+                    "?autoReconnect=" + cloudAutoReconnect + (url != null ? "&" + url : "") + (useSSL ? "&useSSL=true" : "") +
-                            "?autoReconnect=" + cloudAutoReconnect + (url != null ? "&" + url : "") + (useSSL ? "&useSSL=true" : "") +
+                    (s_dbHAEnabled ? "&" + cloudDbHAParams : "") + (s_dbHAEnabled ? "&loadBalanceStrategy=" + loadBalanceStrategy : "");
-                            (s_dbHAEnabled ? "&" + cloudDbHAParams : "") + (s_dbHAEnabled ? "&loadBalanceStrategy=" + loadBalanceStrategy : ""), cloudUsername, cloudPassword);
+            loadDbDriver(cloudConnectionUri);
+
+            final ConnectionFactory cloudConnectionFactory = new DriverManagerConnectionFactory(cloudConnectionUri, cloudUsername, cloudPassword);
 
             final KeyedObjectPoolFactory poolableObjFactory = (cloudPoolPreparedStatements ? new StackKeyedObjectPoolFactory() : null);
 
@@ -1092,6 +1097,7 @@ public class TransactionLegacy implements Closeable {
             final String usageUsername = dbProps.getProperty("db.usage.username");
             final String usagePassword = dbProps.getProperty("db.usage.password");
             final String usageHost = dbProps.getProperty("db.usage.host");
+            final String usageDriver = dbProps.getProperty("db.usage.driver");
             final int usagePort = Integer.parseInt(dbProps.getProperty("db.usage.port"));
             final String usageDbName = dbProps.getProperty("db.usage.name");
             final boolean usageAutoReconnect = Boolean.parseBoolean(dbProps.getProperty("db.usage.autoReconnect"));
@@ -1100,11 +1106,12 @@ public class TransactionLegacy implements Closeable {
             final GenericObjectPool usageConnectionPool =
                     new GenericObjectPool(null, usageMaxActive, GenericObjectPool.DEFAULT_WHEN_EXHAUSTED_ACTION, usageMaxWait, usageMaxIdle);
 
-            final ConnectionFactory usageConnectionFactory =
+            final String usageConnectionUri = usageDriver + "://" + usageHost + (s_dbHAEnabled ? "," + dbProps.getProperty("db.cloud.slaves") : "") + ":" + usagePort +
-                    new DriverManagerConnectionFactory("jdbc:mysql://" + usageHost + (s_dbHAEnabled ? "," + dbProps.getProperty("db.cloud.slaves") : "") + ":" + usagePort +
+                    "/" + usageDbName + "?autoReconnect=" + usageAutoReconnect + (usageUrl != null ? "&" + usageUrl : "") +
-                            "/" + usageDbName + "?autoReconnect=" + usageAutoReconnect + (usageUrl != null ? "&" + usageUrl : "") +
+                    (s_dbHAEnabled ? "&" + getDBHAParams("usage", dbProps) : "") + (s_dbHAEnabled ? "&loadBalanceStrategy=" + loadBalanceStrategy : "");
-                            (s_dbHAEnabled ? "&" + getDBHAParams("usage", dbProps) : "") + (s_dbHAEnabled ? "&loadBalanceStrategy=" + loadBalanceStrategy : ""), usageUsername,
+            loadDbDriver(usageConnectionUri);
-                            usagePassword);
+
+            final ConnectionFactory usageConnectionFactory = new DriverManagerConnectionFactory(usageConnectionUri, usageUsername, usagePassword);
 
             final PoolableConnectionFactory usagePoolableConnectionFactory =
                     new PoolableConnectionFactory(usageConnectionFactory, usageConnectionPool, new StackKeyedObjectPoolFactory(), null, false, false);
@@ -1120,6 +1127,7 @@ public class TransactionLegacy implements Closeable {
                 final String simulatorUsername = dbProps.getProperty("db.simulator.username");
                 final String simulatorPassword = dbProps.getProperty("db.simulator.password");
                 final String simulatorHost = dbProps.getProperty("db.simulator.host");
+                final String simulatorDriver = dbProps.getProperty("db.simulator.driver");
                 final int simulatorPort = Integer.parseInt(dbProps.getProperty("db.simulator.port"));
                 final String simulatorDbName = dbProps.getProperty("db.simulator.name");
                 final boolean simulatorAutoReconnect = Boolean.parseBoolean(dbProps.getProperty("db.simulator.autoReconnect"));
@@ -1127,9 +1135,11 @@ public class TransactionLegacy implements Closeable {
                 final GenericObjectPool simulatorConnectionPool =
                         new GenericObjectPool(null, simulatorMaxActive, GenericObjectPool.DEFAULT_WHEN_EXHAUSTED_ACTION, simulatorMaxWait, simulatorMaxIdle);
 
-                final ConnectionFactory simulatorConnectionFactory =
+                final String simulatorConnectionUri = simulatorDriver + "://" + simulatorHost + ":" + simulatorPort + "/" + simulatorDbName + "?autoReconnect=" +
-                        new DriverManagerConnectionFactory("jdbc:mysql://" + simulatorHost + ":" + simulatorPort + "/" + simulatorDbName + "?autoReconnect=" +
+                        simulatorAutoReconnect;
-                                simulatorAutoReconnect, simulatorUsername, simulatorPassword);
+                loadDbDriver(simulatorConnectionUri);
+
+                final ConnectionFactory simulatorConnectionFactory = new DriverManagerConnectionFactory(simulatorConnectionUri, simulatorUsername, simulatorPassword);
 
                 final PoolableConnectionFactory simulatorPoolableConnectionFactory =
                         new PoolableConnectionFactory(simulatorConnectionFactory, simulatorConnectionPool, new StackKeyedObjectPoolFactory(), null, false, false);
@@ -1147,6 +1157,16 @@ public class TransactionLegacy implements Closeable {
         }
     }
 
+    private static void loadDbDriver(String dbConnectionUri) {
+        try {
+            Driver driver = DriverManager.getDriver(dbConnectionUri);
+            s_logger.debug("Successfully loaded DB driver " + driver.getClass().getName() + " for connection " + dbConnectionUri);
+        } catch (SQLException e) {
+            s_logger.error("Failed to load DB driver for connection " + dbConnectionUri, e);
+            throw new CloudRuntimeException("Failed to load DB driver for connection " + dbConnectionUri, e);
+        }
+    }
+
     private static String getDBHAParams(String dbName, Properties dbProps) {
         StringBuilder sb = new StringBuilder();
         sb.append("failOverReadOnly=" + dbProps.getProperty("db." + dbName + ".failOverReadOnly"));

framework/db/test/db.properties

@@ -29,6 +29,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -49,6 +50,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -62,6 +65,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

framework/jobs/test/resources/db.properties

@@ -22,6 +22,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -42,6 +43,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -55,6 +58,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

packaging/centos63/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 COMPONENTS-SPEC=components-premium.xml
 REMOTEHOST=localhost
 AGENTCLASSPATH=

packaging/centos7/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 COMPONENTS-SPEC=components-premium.xml
 REMOTEHOST=localhost
 AGENTCLASSPATH=

packaging/centos7/tomcat7/db.properties

@@ -25,6 +25,7 @@ region.id=1
 db.cloud.username=cloud
 db.cloud.password=ENC(vlzQjmqOV4s5q7n+S1OMbA==)
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -56,6 +57,8 @@ db.cloud.encrypt.secret=ENC(zaGuSF5a4KyWayn2t0yyjDa0HjdToVtZ)
 db.usage.password=ENC(cQEcN5aVucSYK+WUkPjDcw==)
 db.usage.username=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -69,6 +72,8 @@ db.usage.url.params=
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

packaging/debian/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 COMPONENTS-SPEC=components-premium.xml
 REMOTEHOST=localhost
 AGENTCLASSPATH=

packaging/fedora20/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 COMPONENTS-SPEC=components-premium.xml
 REMOTEHOST=localhost
 AGENTCLASSPATH=

packaging/fedora21/replace.properties

@@ -21,6 +21,7 @@ DBROOTPW=
 MSLOG=vmops.log
 APISERVERLOG=api.log
 DBHOST=localhost
+DBDRIVER=jdbc:mysql
 COMPONENTS-SPEC=components-premium.xml
 REMOTEHOST=localhost
 AGENTCLASSPATH=

plugins/network-elements/globodns/test/resources/db.properties

@@ -27,6 +27,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -47,6 +48,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -60,6 +63,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

plugins/network-elements/juniper-contrail/test/resources/db.properties

@@ -22,6 +22,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -42,6 +43,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -55,6 +58,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

server/test/resources/db.properties

@@ -26,6 +26,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -46,6 +47,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -59,6 +62,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

services/iam/plugin/test/resources/db.properties

@@ -27,6 +27,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -47,6 +48,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -60,6 +63,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

services/iam/server/test/resources/db.properties

@@ -27,6 +27,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -47,6 +48,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -60,6 +63,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

tools/devcloud-kvm/pom.xml

@@ -83,7 +83,7 @@
             </dependencies>
             <configuration>
               <driver>org.gjt.mm.mysql.Driver</driver>
-              <url>jdbc:mysql://${db.cloud.host}:${db.cloud.port}/cloud</url>
+              <url>${db.cloud.driver}://${db.cloud.host}:${db.cloud.port}/cloud</url>
               <username>${db.cloud.username}</username>
               <password>${db.cloud.password}</password>
               <!--all executions are ignored if -Dmaven.test.skip=true -->

tools/devcloud/pom.xml

@@ -83,7 +83,7 @@
             </dependencies>
             <configuration>
               <driver>org.gjt.mm.mysql.Driver</driver>
-              <url>jdbc:mysql://${db.cloud.host}:${db.cloud.port}/cloud</url>
+              <url>${db.cloud.driver}://${db.cloud.host}:${db.cloud.port}/cloud</url>
               <username>${db.cloud.username}</username>
               <password>${db.cloud.password}</password>
               <!--all executions are ignored if -Dmaven.test.skip=true -->

tools/devcloud4/pom.xml

@@ -83,7 +83,7 @@
             </dependencies>
             <configuration>
               <driver>org.gjt.mm.mysql.Driver</driver>
-              <url>jdbc:mysql://${db.cloud.host}:${db.cloud.port}/cloud</url>
+              <url>${db.cloud.driver}://${db.cloud.host}:${db.cloud.port}/cloud</url>
               <username>${db.cloud.username}</username>
               <password>${db.cloud.password}</password>
               <!--all executions are ignored if -Dmaven.test.skip=true -->

usage/conf/db.properties.in

@@ -19,6 +19,7 @@
 db.usage.username=@DBUSER@
 db.usage.password=@DBPW@
 db.usage.host=@DBHOST@
+db.usage.driver=@DBDRIVER@
 db.usage.port=3306
 db.usage.name=cloud_usage
 

usage/test/resources/db.properties

@@ -26,6 +26,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -46,6 +47,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -59,6 +62,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250

utils/conf/db.properties

@@ -29,6 +29,7 @@ db.cloud.username=cloud
 db.cloud.password=cloud
 db.root.password=
 db.cloud.host=localhost
+db.cloud.driver=jdbc:mysql
 db.cloud.port=3306
 db.cloud.name=cloud
 
@@ -49,6 +50,8 @@ db.cloud.url.params=prepStmtCacheSize=517&cachePrepStmts=true&prepStmtCacheSqlLi
 db.usage.username=cloud
 db.usage.password=cloud
 db.usage.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.usage.driver=jdbc:mysql
 db.usage.port=3306
 db.usage.name=cloud_usage
 
@@ -62,6 +65,8 @@ db.usage.autoReconnect=true
 db.simulator.username=cloud
 db.simulator.password=cloud
 db.simulator.host=localhost
+# It's not guaranteed that using a different DB provider than the one from the regular cloud DB will work
+db.simulator.driver=jdbc:mysql
 db.simulator.port=3306
 db.simulator.name=simulator
 db.simulator.maxActive=250