Ansible-HAProxy-Failover

Ansible playbook that provisions a group of servers to run HAProxy with a shared hosting IP from keepalived.

Variables

Variable	Required	Default	Choices	Description
haproxy_bind_adapter	Yes	eth0		Interface to use for the Shared IP
haproxy_config_file	Yes	example.haproxy.cfg.j2		File name to use for the haproxy config file
haproxy_keepalived_adapter	Yes	eth0		Interface to use for the keepalived communication
haproxy_keepalived_adapter_vlan	No			When specified, this will setup the given vlan and use that for the keepalived communication to keep the traffic out of the primary network
haproxy_keepalived_ip	Yes	172.16.10.1/24		IP to use for the keepalived communication
haproxy_keepalived_process_weight	Yes	10		Weight used for tracking the haproxy process on the server
haproxy_listen_ports	Yes	22/tcp, 80/tcp, 443/tcp, 9999/tcp		The firewall ports/protocols that should be opened on the firewall
haproxy_shared_ip	Yes			Shared IP that will be used by the group
haproxy_shared_ip_subnet	Yes	/24		Subnet for the shared IP
haproxy_shared_password	No			Optional password that should be used for the keepalived authentication
haproxy_shared_priority	Yes	100		Keepalived priority for the host - this will
haproxy_shared_state	Yes	MASTER	MASTER/BACKUP	What state the keepalived configuration will start with for the desired host - After config starts it will determine if other members exist and adjust based on priority
haproxy_shared_virtual_router_id	Yes	25		Virtual Router ID for the keepalived configuration - This should be the same for the group

Example

Execute playbook with needed variables

ansible-playbook -i hosts site.yml --ask-pass --ask-become-pass

Inventory File:

---
# file: hosts

haproxy:
  hosts:
    dev-ha01:
      ansible_host: 10.1.1.3
      haproxy_shared_state: MASTER
      haproxy_shared_priority: 101
      haproxy_bind_adapter: "eth0"
      haproxy_keepalived_adapter: "eth0"
      haproxy_keepalived_adapter_vlan: "100"
      haproxy_keepalived_ip: 172.16.10.1/24
    
    dev-ha02:
      ansible_host: 10.1.1.4
      haproxy_shared_state: BACKUP
      haproxy_shared_priority: 100
      haproxy_bind_adapter: "eth0"
      haproxy_keepalived_adapter: "eth0"
      haproxy_keepalived_adapter_vlan: "100"
      haproxy_keepalived_ip: 172.16.10.2/24

    dev-ha03:
      ansible_host: 10.1.1.5
      haproxy_shared_state: BACKUP
      haproxy_shared_priority: 99
      haproxy_bind_adapter: "eth0"
      haproxy_keepalived_adapter: "eth0"
      haproxy_keepalived_adapter_vlan: "100"
      haproxy_keepalived_ip: 172.16.10.3/24

  vars:
    haproxy_shared_ip: "10.10.2.60"
    haproxy_shared_ip_subnet: "/24"
    haproxy_shared_virtual_router_id: 25
    

License

See LICENSE file for full license information.