How to properly organize the smooth operation of the process?

Question

bash

Hello.
Colleagues, how to organize the smooth operation of the process in the most correct and high-quality way on centos 6?
The process should every 2 sec. open the URL.
It is necessary that the process can be controlled (started and stopped).
The process should only run 1 (no duplication). Those. if a process is running, the same process should not be started.
Thanks to all.

Answer 1

Actually, most of the time processes that work like this are written as daemons.
There are a million examples.

Answer 2

make a lock file for the process

Answer 3

supervisord.org