Quick Chat: Server Load Balancing and Redundancy with HA Proxy
What is HA Proxy?
HA Proxy is a free and open source load balancer and proxy server for tcp and HTTP based applications that allows for spread requests across multiple servers.
- How To Install HA Proxy? (For This Chat I’m on Ubuntu 18.04):
sudo add-apt-repository ppa:vbernat/haproxy-1.8 sudo apt-get update sudo apt-get install haproxy
- How To Setup HA Proxy?
sudo vim /etc/haproxy/haproxy.cfg
- the configuration file can look similar to the one here
- The lines below are the focus for this quick chat
frontend proxy_server #define the listener bind *:80 #This forwards traffic to the local box indicated by * mode http # http traffic default_backend web_servers #what traffic needs to be forwarded backend web_servers
- note that web_servers above and here are the same b/c “web_servers” is an identifier for defining the backend
mode http balance roundrobin
roundrobinis one balance scheme that allows for the two web servers below to switch back and forth
server web01 10.0.5.100:80 #the ip and port of the first server you want to balance server web02 10.0.5.101:80 #ip and port of the second server you want to balance
- Restart The Service
sudo systemctl enable haproxy sudo systemctl start haproxy
- There ya have it! Pretty Quick. Relatively Simple. Fairly Intuitive.
We went on a bare bones minimum config here, but if you need to set it up for enterprise or something larger or you just want to know more about the configurations, there’s a lot of great documentation out on the web.
After all, HA Proxy is the world’s fastest and most widely-used software load balancer!
As Always If You Have Questions Feel Free To HMU @j3st3rjam3s