Add a Jenkins Slave node

add_jenkins_slave.sh

SLAVE_NAME=$1
CREDENTIALS_ID=<INSERT_CREDENTIALS_HERE>
# USERNAME & PASSWORD is read from Jenkins credentials
cat <<EOF | java -jar /var/lib/jenkins/war/WEB-INF/jenkins-cli.jar -s http://localhost:8080/ create-node ${SLAVE_NAME} --username $USERNAME --password $PASSWORD
<slave>
  <name>${SLAVE_NAME}</name>
  <description>A Jenkins Slave node</description>
  <remoteFS>/home/jenkins</remoteFS>
  <numExecutors>5</numExecutors>
  <mode>NORMAL</mode>
  <retentionStrategy class="hudson.slaves.RetentionStrategy$Always"/>
  <launcher class="hudson.plugins.sshslaves.SSHLauncher" plugin="ssh-slaves@1.10">
    <host>${SLAVE_NAME}.example.com</host>
    <port>22</port>
    <credentialsId>${CREDENTIALS_ID}</credentialsId>
    <maxNumRetries>0</maxNumRetries>
    <retryWaitTime>60</retryWaitTime>
  </launcher>
  <label>slave</label>
  <nodeProperties/>
  <userId>${USERNAME}</userId>
</slave>
EOF