Starting Datameer at Boot Time

The following describes how to edit and set up the attached Datameer X startup script in CentOS 5.6. These should work the same on other Linux distributions.

An example of shell script code is below:

Prerequisites

Datameer X should be installed and running successfully. (i.e., <path to das>/bin/conductor.sh start)

Datameer

Create the script on the Linux machine.
Move the das.server script to /etc/init.d/. Note: These scripts should be owned by root:
Edit the das.server script:
1. Change the value of DAS_HOME to the correct path
  1. export DAS_HOME=/opt/das
2. Change DAS_USER to the same user that owns /opt/das directory and has been previously defined in das-env.sh
  1. export DAS_USER=datameer
3. Change PID_PATH to a location where the das pid file can be stored.
  1. export PID_PATH=/var/lock/subsys
Add das server to the list of available services in Linux:
1. chkconfig --add das.server
Check what init levels are active for Das:
1. chkconfig --list |grep das.server (Notice init 3,4,5 have das “on”)

das.server 0:off 1:off 2:off 3:on 4:on 5:on 6:off

This automates the start of Datameer X at bootup.

#!/bin/bash
#set -x
#
# Starts a Datameer X Server
# chkconfig: 345 90 10
# description: DAS Server

export DAS_HOME=/opt/das
export DAS_USER=das
export PID_PATH=/var/lock/subsys

#Source Function Library
. /etc/rc.d/init.d/functions

RETVAL=0
PIDFILE="/var/lock/subsys/das.pid"
desc="DAS Server daemon"
#######################################################################

start() {
  echo -n $"Starting $desc (DAS): "
  daemon --user $DAS_USER $DAS_HOME/bin/conductor.sh start /dev/null2>&1
  RETVAL=$?
  echo
  [ $RETVAL -eq 0 ] && touch $PID_PATH/das
  return $RETVAL
}

stop() {
  echo -n $"Stopping $desc (DAS): "
  daemon --user $DAS_USER $DAS_HOME/bin/conductor.sh stop
  RETVAL=$?
  sleep 5
  echo
  [ $RETVAL -eq 0 ] && rm -f $PID_PATH/das $PIDFILE
}

checkstatus(){
  ps |grep das
}

restart() {
  stop
  start
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  status)
    checkstatus
    ;;
  restart)
    restart
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|restart}"
    exit 1
esac

exit $RETVAL

Datameer - Automatic Start with systemd

Create the script on the Linux machine.
Move the das_systemd.service script to /etc/systemd/system.
Note: These scripts should be owned by root with 0644 permissions.
Edit the das_systemd.service script:
1. Change the value of DAS_HOME to the correct path
  1. export DAS_HOME=/opt/das
2. Change DAS_USER to the same user that owns /opt/das directory and has been previously defined in das-env.sh
  1. export DAS_USER=datameer
3. Change PID_PATH to a location where the das pid file can be stored.
  1. export PID_PATH=/var/lock/subsys

This automates the start of Datameer X at bootup:

[Unit]
Description=Datameer X Server daemon
# Start only after metastore is up and running. 
# Specify mysqld.service for MySQL, or mariadb.service for MariaDB.
# If not using a local metastore, comment the After line out below.
After=mysqld.service

[Service]
# Update DAS_HOME and DAS_USER.
# DAS_USER must match $DAS_HOME/etc/das-env.sh
Environment=DAS_HOME='/opt/das'
Environment=DAS_USER='datameer'
ExecStart=$DAS_HOME/bin/conductor.sh start
ExecReload=$DAS_HOME/bin/conductor.sh restart
ExecStop=$DAS_HOME/bin/conductor.sh stop
Type=forking
PIDFile=/var/lock/subsys/das.pid
User=$DAS_USER

[Install]
WantedBy=multi-user.target