HAProxy is a free HTTP/TCP high accessibility load balancer and intermediary worker. It spreads demands among various workers to moderate issues coming about because of single worker disappointment. HA Proxy is utilized by various prominent sites including GitHub, Bitbucket, Stack Overflow, Reddit, Tumblr, Twitter and Tuenti and is utilized in the OpsWorks item from Amazon Web Services.
Step 1: Update the Systen
You need to use the given command to update the ubuntu current repository and upgrade the ubuntu packages.
sudo apt-get update
sudo apt-get upgrade -yStep 2: Install HAproxy
You need to install the HAproxy by using the following command.
sudo apt-get install haproxy -yAfter installation of the packages you need to verify the haproxy service status, Use the following command to do that.
sudo systemctl status haproxyYou should get the service output like this.
By default you will get the HAproxy service on boot enable and running state while installation the package.
Step 3: Enable Stats
To enable Haproxy stats is optional, You wants to haproxy stats lets do the following configuration in HAproxy main configuration file.
sudo vim /etc/haproxy/haproxy.cfgand add the given syntac in the end of the configuration.
listen stats
bind :1936
stats enable
stats hide-version
stats refresh 30s
stats show-node
stats auth username:password
stats uri /statsSave and exit from vim text editor and verify the HAproxy syntax by using the following command.
sudo haproxy -f /etc/haproxy/haproxy.cfg -c
sudo haproxy -f /etc/haproxy/haproxy.cfg -c If your configuration is valid so then we need to restart the HAproxy service by using the given command.
sudo systemctl restart haproxy
sudo systemctl restart haproxyStep 4: HAproxy Stats
To get the HAproxy stats in the browser, You need to open the given url with port.
http://localhost:1936/stats or http://IP_Address:1936/stats along with your username with password.
After login in the Haproxy credentials, You should get the HAproxy dashboard like this.
Here you can find more HAproxy configuration for Redis with auth configuration.
For Redis master node with auth configuration.
frontend Redis
bind *:6378 name redis
mode tcp
log global
timeout client 30000
default_backend Redis_tcp_ipvANY
backend Redis_tcp_ipvANY
mode tcp
timeout connect 30000
timeout server 30000
retries 3
option tcp-check
#uncomment these lines if you have basic auth
#tcp-check send AUTH 123456rn
#tcp-check expect +OK
tcp-check connect
tcp-check send AUTH YOUR_PASSWORD_HERErn
#tcp-check expect +OK
tcp-check send PINGrn
tcp-check expect string +PONG
tcp-check send info replicationrn
tcp-check expect string role:master
tcp-check send QUITrn
tcp-check expect string +OK
server redis1 10.10.10.10:6379 check inter 1000 maxconn 1024
server redis2 10.10.10.11:6379 check inter 1000 maxconn 1024
server redis3 10.10.10.12:6379 check inter 1000 maxconn 1024For Redis slave node with auth configuration.
frontend Redis-slave
bind *:6377 name redis-slave
mode tcp
log global
timeout client 30000
default_backend Redis_tcp_ipvANY-slave
backend Redis_tcp_ipvANY-slave
mode tcp
balance roundrobin
timeout connect 30000
timeout server 30000
retries 3
option tcp-check
#uncomment these lines if you have basic auth
#tcp-check send AUTH YOUR_PASSWORD_HERErn
#tcp-check expect +OK
tcp-check connect
tcp-check send AUTH 123456rn
#tcp-check expect +OK
tcp-check send PINGrn
tcp-check expect string +PONG
tcp-check send info replicationrn
#tcp-check expect string role:slave
tcp-check send QUITrn
tcp-check expect string +OK
server redis1 10.10.10.10:6379 check inter 1000 maxconn 1024
server redis2 10.10.10.11:6379 check inter 1000 maxconn 1024
server redis3 10.10.10.12:6379 check inter 1000 maxconn 1024Conclusion
Congrats on effectively designing HAProxy! With an essential burden balancer arrangement, you can extensively expand your web application execution and accessibility. This guide is anyway a prologue to stack offsetting with HAProxy, which is prepared to do substantially more than what could be canvassed in first-time arrangement guidance. We suggest trying different things with various designs with the assistance of the broad documentation accessible for HAProxy, and afterward begin arranging the heap adjusting for your creation climate.
Configure HAproxy with Redis master-slave load balancer on Ubuntu 22.04 LTS