Sample Service Script for Amazon (RHEL-based) Linux AMI

Sample System V init script (service script) for startup services that is written for Amazon Linux AMI (and therefore for RHEL-based linux). Alternative to 'linux daemons' which AWS Linux AMI does not support.

Original script is taken from wyhasany's script

And:

• Modified and improved for running on Amazon's RHEL-compatible Linux Image
• Added Environment Variables configuration at startup to enable different configurations at the runtime (for stages like 'Dev', 'Prod'...)

Look at LSB init scripts / System V init scripts for more information.

Usage

Download the script ExampleService.sh

Some example values and implementation is provided in the script. For now, on run it writes Environment Values to the log file

Edit the script by replacing the fields in between the <Edit Following Fields> tag with your own values:

• Modify the LSB header. Change ExampleService with your name and change default configuration if you wish
• SERVICE_NAME = Your service's name
• SCRIPT = Your script to run on service start
• RUNAS = User to run the SCRIPT as
• PidFileLocation = Location of PIDFILE to store
• LogFileLocation = Location of LOGFILE to store
• Optionally customize Environment Values according to the Runtime as its explained in the script

Start and test your service:

Install the service to /etc/init.d with install command

# sh {YOUR_SCRIPT_NAME} install
sh ExampleService.sh install

It configures the service to chkconfig. If you don't want to run at boot-time then delete it from chkconfig

# chkconfig --del {YOUR_SERVICE_NAME}
chkconfig --del ExampleService

Start the service

service ExampleService start

Start the service with custom Environment Variables.

If you define Environment Variables for ,say, 'Dev' in the script like;

EnvironmentVariables_Dev=( "ConnString:DevString" "ASPNETCORE_ENVIRONMENT:Dev" )

then start the service with --environment option

service ExampleService --environment Dev start

Other commands

start , stop , status , restart , install , uninstall

Usage: service ExampleService --environment Dev {optional} start | stop | status | restart | install | uninstall