haproxy
- high available proxy
- load balancer
Structure
global
# process-level settings go here
defaults
# default settings go here
frontend listener
# a frontend that accepts requests from clients
backend webservers
# servers that fulfill the requests
Install
sudo dnf install haproxy
Config
global
maxconn 256
log 127.0.0.1 local0
user haproxy
group haproxy
daemon
# Minimize memory usage for small server
tune.bufsize 16384
tune.maxrewrite 1024
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
# Enable compression to save bandwidth
compression algo gzip
compression type text/html text/plain text/css application/javascript
frontend http_front
bind *:80
# Domain-based routing
acl host_express hdr(host) -i ex.okdevtv.com
acl host_python hdr(host) -i py.okdevtv.com
use_backend express_backend if host_express
use_backend python_backend if host_python
default_backend express_backend
backend express_backend
balance roundrobin
option httpchk GET /health
server express-server 127.0.0.1:3000 check
backend python_backend
balance roundrobin
server python-server 127.0.0.1:5000 check
ref
OKdevTV
