Using the locking client

With composer

composer require php-remote-lock

Without composer

git clone https://github.com/sfinktah/php-remote-lock /path/to/project-root/RemoteLock

/path/to/project-root/index.php

<?php
require_once "RemoteLock/RemoteLock.php";

Obtaining a lock

function main(...$args) {
    $lock = new \Sfinktah\RemoteLock\SingleInstanceRemoteLock('lock_name', 'https://markt14.streetfx.au');
    if ($lock->lockCall(3600 /* 1 hour */, function(...$args) {
        doWork(...$args);
    }, ...$args)) {
        printf("Work Done\n");
    }
    else {
        printf("Failed to acquire lock\n");
    }
}

Installing the locking server

/etc/systemd/system/php-remote-lock.service

[Unit]
Description=PHP Remote Lock Master Service
After=network.target

[Service]
ExecStart=/usr/bin/python3 /path/to/RemoteLock/libexec/idarest_master.py
Restart=always

[Install]
WantedBy=default.target

sudo systemctl enable php-remote-lock.service
sudo systemctl start php-remote-lock.service
sudo systemctl show php-remote-lock.service

/etc/nginx/nginx.conf

server {
    # ...

    location /lock {
        proxy_pass http://127.0.0.1:28612;
    }

    # ...
}

sudo nginx -t &&
sudo systemctl restart nginx