How to Automate Nginx Service Down/Up and Reload with Bash Scripts

1. Configure Nginx down script

Create nginx/nginx-biz-service-down.sh with the following content:

#!/bin/bash
nginx_ip=$1
remote_ip=$2
port=$3
ssh -p 22 root@${nginx_ip} "sed -i 's/server ${remote_ip}:${port};/server ${remote_ip}:${port} down;/' /usr/local/nginx/conf/vhosts/upstream.conf"
# Hot‑load Nginx
ssh root@${nginx_ip} "/usr/local/nginx/sbin/nginx -s reload"

This script receives the Nginx host IP, the target upstream IP, and the port, then marks the upstream entry as down and reloads Nginx to apply the change.

2. Configure Nginx up script

Create nginx/nginx-biz-service-up.sh with the following content:

#!/bin/bash
nginx_ip=$1
remote_ip=$2
port=$3
ssh -p 22 root@${nginx_ip} "sed -i 's/server ${remote_ip}:${port} down;/server ${remote_ip}:${port};/' /usr/local/nginx/conf/vhosts/upstream.conf"
# Hot‑load Nginx
ssh root@${nginx_ip} "/usr/local/nginx/sbin/nginx -s reload"

This script reverses the previous change by removing the down flag from the upstream entry and then reloads Nginx.

Both scripts can be invoked with the Nginx server IP, the upstream IP, and the service port, enabling quick toggling of service availability without manual configuration edits.