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 MongoDB master and slave configuration.
For MongoDB master node with auth configuration.
frontend mongo
bind *:27018 name mongo
mode tcp
log global
timeout client 30000
default_backend mongo
backend mongo
mode tcp
option tcp-check
#balance roundrobin
#tcp-check expect binary 69736d61737465720001
tcp-check send-binary 3a000000 # Message Length (58)
tcp-check send-binary EEEEEEEE # Request ID (random value)
tcp-check send-binary 00000000 # Response To (nothing)
tcp-check send-binary d4070000 # OpCode (Query)
tcp-check send-binary 00000000 # Query Flags
tcp-check send-binary 61646d696e2e # fullCollectionName (admin.$cmd)
tcp-check send-binary 24636d6400 # continued
tcp-check send-binary 00000000 # NumToSkip
tcp-check send-binary FFFFFFFF # NumToReturn
# Start of Document
tcp-check send-binary 13000000 # Document Length (19)
tcp-check send-binary 10 # Type (Int32)
tcp-check send-binary 69736d617374657200 # ismaster:
tcp-check send-binary 01000000 # Value : 1
tcp-check send-binary 00 # Term
tcp-check expect binary 69736d61737465720001 #ismaster True
option tcpka
option tcplog
server mongo1 10.10.10.10:27017 check inter 2000
server mongo2 10.10.10.11:27017 check inter 2000
server mongo3 10.10.10.12:27017 check inter 2000For MongoDB slave node with auth configuration.
frontend mongo-slave
bind *:27019 name mongo-slave
mode tcp
log global
timeout client 30000
default_backend mongo-slave
backend mongo-slave
mode tcp
option tcp-check
balance roundrobin
#tcp-check expect binary 69736d61737465720001
tcp-check send-binary 3a000000 # Message Length (58)
tcp-check send-binary EEEEEEEE # Request ID (random value)
tcp-check send-binary 00000000 # Response To (nothing)
tcp-check send-binary d4070000 # OpCode (Query)
tcp-check send-binary 00000000 # Query Flags
tcp-check send-binary 61646d696e2e # fullCollectionName (admin.$cmd)
tcp-check send-binary 24636d6400 # continued
tcp-check send-binary 00000000 # NumToSkip
tcp-check send-binary FFFFFFFF # NumToReturn
# Start of Document
tcp-check send-binary 13000000 # Document Length (19)
tcp-check send-binary 10 # Type (Int32)
#tcp-check send-binary 69736d617374657200 # ismaster:
tcp-check send-binary 01000000 # Value : 1
tcp-check send-binary 00 # Term
#tcp-check expect binary 69736d61737465720001 #ismaster True
option tcpka
option tcplog
server mongo1 10.10.10.10:27017 check inter 2000
server mongo2 10.10.10.11:27017 check inter 2000
server mongo3 10.10.10.12:27017 check inter 2000 Conclusion
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 MongoDB master-slave load balancer on ubuntu 22.04 LTS
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