maint-http

Fast-superlight http "backup" backend for haproxy
This is designed to serve static http pages for maintenance purposes.

Usage

Usage: ./maint-http [-d <directory_to_serve>] [-p <tcp_listen_port>]

Note

This application binds to localhost only!

Performance test

Use bombardier

./bombardier -c 125 -n 2690701 http://localhost:3000

Compile

go build maint-http.go

HTML static pages and resource files

subfolder html contains resource files:

• index.html --> maintenance page
• res subfolder
  • *.woff2 --> fonts
  • *.jpg --> images

CSS is embedded in the html file

Of course you can totally customize your maintenance page. This is just a clean example.

Systemd integration

Use the included systemd unit

HAProxy configuration example

Here an example of haproxy configuration

backend soa12qa_be
    balance     roundrobin
    cookie HAPROXYSRV insert nocache
    #option httpchk
    server  soa12-qa-wt01 10.211.9.12:8777 cookie soa12-qa-wt01 check
    server  soa12-qa-wt02 10.211.9.13:8777 cookie soa12-qa-wt02 check
    server  maintenance 127.0.0.1:3000 check backup