Learn how to set up Docker Image HAproxy Centos. Our Docker Support team is here to help you with your questions and concerns.

Docker Image HAproxy Centos | Set Up Guide

Docker is a lightweight and portable solution for packaging, distributing, and running applications in containers.

Today, we are going to take a look at setting up HAProxy inside a Docker container.

1. To begin with, we have to create a `Dockerfile` in a new directory. This file acts as the blueprint for building our Docker image. Below are the contents of the Dockerfile:

   # Use the official CentOS base image
   FROM centos:latest
   # Install HAProxy
   RUN yum -y update && yum -y install haproxy && yum clean all
   # Copy the HAProxy configuration file to the image
   COPY haproxy.cfg /etc/haproxy/haproxy.cfg
   # Expose HAProxy port
   EXPOSE 80
   # Start HAProxy
   CMD ["haproxy", "-f", "/etc/haproxy/haproxy.cfg"]
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2. Next, create a HAProxy configuration file named `haproxy.cfg` in the same directory as the Dockerfile. Here’s a basic example to get you started:

   global
   log /dev/log local0
   log /dev/log local1 notice
   chroot /var/lib/haproxy
   stats socket /run/haproxy/admin.sock mode 660 level admin
   stats timeout 30s
   user haproxy
   group haproxy
   daemon
   defaults
   log global
   mode http
   option httplog
   option dontlognull
   timeout connect 5000
   timeout client 50000
   timeout server 50000
   frontend myfrontend
   bind *:80
   mode http
   default_backend mybackend
   backend mybackend
   mode http
   server webserver1 webserver1_ip:webserver1_port
   server webserver2 webserver2_ip:webserver2_port
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   Remember to replace `webserver1_ip`, `webserver1_port`, `webserver2_ip`, and `webserver2_port` with the actual IP addresses and ports of the backend servers.
3. Then, open a terminal and go to the directory containing the Dockerfile and HAProxy configuration file. Next, run this command:

   docker build -t my-haproxy Copy Code

   This command builds a Docker image named `my-haproxy` based on the Dockerfile and configuration files in the current directory.
4. Once the image is built, we can run a container from it:

   docker run -d -p 8080:80 --name my-haproxy-container my-haproxyCopy Code

   This command runs the HAProxy container in detached mode, mapping port 8080 on our host machine to port 80 on the container.

With the above steps, we can easily set up an HAProxy instance running on CentOS inside a Docker container. Let us know in the comments if you need further help.

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Conclusion

In brief, our Support Experts demonstrated how to set up HAProxy inside a Docker container.