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Deployment synchronization can be done using rsync, which is a file copying tool. These changes must be done in the manager node and in the same directory.

  1. Create a file called workers-list.txt that lists all the worker nodes in the deployment. The following is a sample of the file where there are two worker nodes.

    Tip: Different nodes are separated by new lines.

    workers-list.txt
    ubuntu@192.168.1.1:~/setup/192.168.1.1/as/as_worker/repository/deployment/server
    ubuntu@192.168.1.2:~/setup/192.168.1.2/as/as_worker/repository/deployment/server
  2. Create a file to synchronize the <PRODUCT_HOME>/repository/deployment/server folders between the manager and all worker nodes.

    Note: You must create your own SSH key and define it as the pem_file. Alternatively, you can use an existing SSH key. Specify the manager_server_dir depending on the location in your local machine. Change the logs.txt file path and the lock location based on where they are located in your machine.

    rsync-for-carbon-depsync.sh
    #!/bin/sh
    
    manager_server_dir=~/wso2as-5.2.1/repository/deployment/server/
    pem_file=~/.ssh/carbon-440-test.pem
    
    
    #delete the lock on exit
    trap 'rm -rf /var/lock/depsync-lock' EXIT 
    
    mkdir /tmp/carbon-rsync-logs/
    
    
    #keep a lock to stop parallel runs
    if mkdir /var/lock/depsync-lock; then
      echo "Locking succeeded" >&2
    else
      echo "Lock failed - exit" >&2
      exit 1
    fi
    
    
    #get the workers-list.txt
    pushd `dirname $0` > /dev/null
    SCRIPTPATH=`pwd`
    popd > /dev/null
    echo $SCRIPTPATH
    
    
    for x in `cat ${SCRIPTPATH}/workers-list.txt`
    do
    echo ================================================== >> /tmp/carbon-rsync-logs/logs.txt;
    echo Syncing $x;
    rsync --delete -arve "ssh -i  $pem_file -o StrictHostKeyChecking=no" $manager_server_dir $x >> /tmp/carbon-rsync-logs/logs.txt
    echo ================================================== >> /tmp/carbon-rsync-logs/logs.txt;
    done
  3. Create a Cron job that executes the above file every minute for deployment synchronization. Do this by running the following command in your command line.

    Note: You can run the Cron job on one given node (master) at a given time. If you switch it to another node, you must stop the Cron job on the existing node and start a new Cron job on the new node after updating it with the latest files so far.

    *   *  *   *   *     /home/ubuntu/setup/rsync-for-depsync/rsync-for-depsync.sh

 

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