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4.4. Using sudo with JBoss ON Operations

The time to use sudo is for long-running operations, such as starting a service or a process, or for scripts which are owned by a resource user. The user which executes the script should be the same as the resource user because that user already has the proper authorization and permissions.
The user can really be the same, or the JBoss ON user can be granted sudo rights to the given command.
When elevating the agent user's permissions, two things must be true:
  • There can be no required interaction from the user, including no password prompts.
  • It should be possible for the agent to pass variables to the script.
To set up sudo for resource scripts:
  1. Grant the JBoss ON agent user sudo rights to the specific script or command. For example, to run a script as the jbossadmin user: 
    [root@server ~]# visudo

jbosson-agent     hostname=(jbossadmin)  NOPASSWD: /opt/jboss-eap/jboss-as/bin/*myScript*.sh
    Copy to Clipboard Toggle word wrap
    Using the NOPASSWD option runs the command without prompting for a password.

    Important

    JBoss ON passes command-line arguments with the start script when it starts an EAP instance. This can be done either by including the full command-line script (including arguments) in the sudoers entry or by using the sudo -u user command in a wrapper script or a script prefix.
    The second option has a simpler sudoers entry
  2. Create or edit a wrapper script to use. Instead of invoking the resource's script directly, invoke the wrapper script which uses sudo to run the script.

    Note

    For the EAP start script, it is possible to set a script prefix in the connection settings, instead of creating a separate wrapper script: 
    /usr/bin/sudo -u jbosson-agent
    Copy to Clipboard Toggle word wrap
    For example, for a start script wrapper, start-myScript.sh: 
    #!/bin/sh
# start-myScript.sh
# Helper script to execute start-myConfig.sh as the user jbosson-agent
#
sudo -u jbosson-agent /opt/jboss-eap/jboss-as/bin/start-myConfig.sh
    Copy to Clipboard Toggle word wrap
  3. Create the start script, with any arguments or settings to pass with the run.sh script. For example, for start-myConfig.sh: 
    nohup ./run.sh -c MyConfig -b jonagent-host 2>&1> jboss-MyConfig.out &
    Copy to Clipboard Toggle word wrap
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