Running a script on boot
ansible-wireguard-openwisp role needed to be updated to add this
functionality.
I modified the update_wireguard.sh script to introduce a new function for
bringing up interfaces. Then I modified the script to allow calling each
function from the terminal. Adding ”$@” at the end of file does the trick.
Executing a command on boot was pretty easy on CentOS. All I had to do was add
the command in /etc/rc.d/rc.local and make that file executable. I thought my
job was done, but I was wrong. Such a file does not exist on Debian
derivatives. Instead of adding workarounds for different distributions,
I started from scratch and created my own service for bringing up WireGuard
interfaces that worked similar to rc.local. Adding a custom service helped
prevent bloating of ansible-wireguard-openwisp role.
I learnt many things today, since it was the first time I interacted with system services except for restarting or enabling an existing service.