Now, in this article we're gonna configure HAproxy in AWS instance.
Since our load balancer and webservers are running in AWS instance we have to give the location of the AWS instance private key in the Ansible Inventory:
Ansible Inventory file:
[webservers]
15.207.116.138 ansible_user=ec2-user ansible_ssh_private_key_file=/root/aws/server.pem ansible_connection=ssh
[load_balancer]
13.233.144.75 ansible_user=ec2-user ansible_ssh_private_key_file=/root/aws/loadbalancer.pem ansible_connection=ssh
ansible.cfg file :
[defaults]
inventory=/root/ansible/ip.txt
host_key_checking = false
ask_pass = false
[privilege_escalation]
become=yes
become_ask_pass=false
become_user=root
become_method=sudo
Here we have to escalate the privileges to root user as AWS instances by default login as ec2-user by which we cannot download HAproxy .
haproxy.cfg file:
here before we upload the haproxy.cfg in the loadbalancer node and we use Jinja for loop in the file which will automatically add the IP of web servers into the file.
Now we write playbook for configuring HAproxy and Webservers:
---
- hosts: load_balancer
tasks:
- name: Downloading Haproxy
package:
name: "haproxy"
state: present
- name: Copying Haproxy configuration files
template:
src: "haproxy.cfg"
dest: /etc/haproxy/
notify:
- Restarting Load Balancer
- name: Starting Haproxy
service:
name: haproxy
state: started
handlers:
- name: Restarting Load Balancer
service:
name: haproxy
state: restarted
- hosts: webservers
tasks:
- name: Installing httpd
package:
name: "httpd"
state: present
- name: Copying HTML files
copy:
src: "/root/ansible/home.html"
dest: /var/www/html/
notify:
- Restarting httpd
- name: Starting httpd
service:
name: httpd
state: started
handlers:
- name: Restarting httpd
service:
name: "httpd"
state: restarted
After the program has ran successfully, then we can check the changes by entering the IP address of the reverse proxy server in the webserver.
