如果不利用ansible自動化部署工具，其部署繁瑣程度可通過點選這裡檢視

這裡我們通過ansible 進行部署，只需要熟悉playbook書寫相關規則：

[[email protected] ansible]# cat hosts
[test]
server2

[prod]
server3

[webserver:children]
test
prod

[lb]
server1

[[email protected]
 
 ansible]# cat ansible.cfg 
[defaults]
inventory      = ./hosts
[privilege_escalation]
become=True
become_method=sudo
become_user=root
become_ask_pass=False

部署apache:

[[email protected] ansible]# cat playbook1.yml
---
- hosts: webserver    ###在server2、server3主機上安裝部署apache
  tasks:
  - name: install
 
 the latest version of Apache from the testing repo
    dnf:
      name: httpd
      state: present
  - name: add index.html
    copy:
      content: "{{ ansible_hostname }}"  ##將登陸的主機名字寫入兩個輪詢主機發布目錄中。
      dest: /var/www/html/index.html

  - name: start apache
    service:
      name: httpd
      state: started
      enabled: yes
 

  - name: add http to firewalld
    firewalld:
      service: http
      permanent: yes
      state: enabled
      immediate: yes
- import_playbook: haproxy.yml

部署haproxy:

[[email protected] ansible]# cat haproxy.yml 
--- 
- hosts: lb    ##在排程主機上安裝haproxy服務。
  tasks:
  - name: install haproxy
    dnf: 
      name: haproxy
      state: present

  - name: configure haproxy    ##更改該目錄下的haproxy.cfg檔案，將與/etc/haproxy/haproxy.cfg進行對比，若發生更改就將其同步，並觸發restart haproxy任務。
    template:
      src: haproxy.cfg
      dest: /etc/haproxy/haproxy.cfg
    notify: restart haproxy

  - name: start haproxy
    service:
      name: haproxy
      state: started

  - name: accept haproxy   
    firewalld:
      service: http
      permanent: yes
      immediate: yes
      state: enabled

  handlers:
  - name: restart haproxy
    service:
      name: haproxy
      state: restarted

[[email protected] ansible]# cat haproxy.cfg 

定義排程的埠：

將需要排程的主機寫進配置檔案：

在客戶機端測試：

我們發現在server2和server3之間進行輪詢切換。