Centos - running commands at system initialization

Did this to restart DB and Web server during system boot.

1. Create a initialization script at /root/instance_init.sh

Commands are chained using && to make sure it executes in sequence

#!/bin/bash
echo "Step: staring mysql" &&
service mysqld start &&
echo "Step: restoring database" &&
runuser -l auser -c '/home/auser/mysqlrestore/s3_to_db_restore.sh' &&
echo "Step: starting jboss" &&
runuser -l auser -c '/usr/local/jboss-6.1.0.Final/bin/startjboss.sh'

2. Open > vi /etc/rc.d/rc.local
append a line:

sh /root/instance_init.sh

Killing JBoss process

ps -ef | grep java | awk 'NR==1{print $2}' | xargs kill -9

NR==1 gets the first process.

JBoss 6 root context

Suppose you have an application (say named example) deployed in JBoss 6.
By default your application will be accessed by <Your URL>/example.

Suppose you want to make the application available at <Your URL> i.e the root location.
Then follow the following 2 steps:

1. Change the context of the ROOT.war application

To do that, create a file named jboss-web.xml  under <base folder>/jboss-6.1.0.Final/server/default/deploy/ROOT.war/WEB-INF.

<?xml version="1.0"?>

<!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 5.0//EN"
"http://www.jboss.org/j2ee/dtd/jboss-web_5_0.dtd">

<jboss-web>
<context-root>root</context-root>
</jboss-web>

2. Add a jboss-web.xml  under WEB-INF of your application
<?xml version="1.0"?>

<!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 5.0//EN"
"http://www.jboss.org/j2ee/dtd/jboss-web_5_0.dtd">

<jboss-web>
<context-root>/</context-root>
</jboss-web>

Now running <Your URL> in a browser will point to your example application.