ansible部署简单高可用LAMP

ansible主机：192.168.152.145

HA1（HighAvailable）：192.168.152.140
HA2：192.168.152.141
VIP1（virtualIP）：192.168.152.190
VIP2：192.168.152.191
AP1（Apache+PHP）：192.168.152.142
AP2（Apache+PHP）：192.168.152.143
DB:192.168.152.144

配置ansible

yum -y install ansible

vim /etc/ansible/hosts

[nginx]192.168.152.140192.168.152.141[ap]192.168.152.142192.168.152.143[db]192.168.152.144

ssh-keygen -t rsa -P ''

ssh-copy-id -i .ssh/id_rsa.pub root@192.168.152.140
ssh-copy-id -i .ssh/id_rsa.pub root@192.168.152.141
ssh-copy-id -i .ssh/id_rsa.pub root@192.168.152.142
ssh-copy-id -i .ssh/id_rsa.pub root@192.168.152.143
ssh-copy-id -i .ssh/id_rsa.pub root@192.168.152.144
ansible all -m ping测试连通性

创建roles

mkdir /etc/ansible/roles/keepalived/{files,tasks,templates,handlers,vars,default} -pv
mkdir /etc/ansible/roles/nginx/{files,tasks,templates,handlers,vars,default} -pv
mkdir /etc/ansible/roles/apachephp/{files,tasks,templates,handlers,vars,default} -pv
mkdir /etc/ansible/roles/database/{files,tasks,templates,handlers,vars,default} -pv

vim /etc/ansible/roles/keepalived/tasks/main.yml

- name: install keepalived  yum: name=keepalived state=present- name: install conf file  template: src=keepalived.conf.j2 dest=/etc/keepalived/keepalived.conf- name: start keepalived  service: name=keepalived state=started enabled=true

vim /etc/ansible/roles/nginx/tasks/main.yml

- name: install nginx  yum: name=nginx state=present- name: install conf file  template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf- name: start nginx  service: name=nginx state=started enabled=true

vim /etc/ansible/roles/apachephp/tasks/main.yml

- name: install httpd  yum: name=httpd state=present- name: install php  yum: name=php state=present- name: install php-mysql  yum: name=php-mysql state=present- name: install httpconf file  template: src=http.conf.j2 dest=/etc/httpd/conf/httpd.conf- name: install html file  template: src=html.index.j2 dest=/var/www/html/index.php- name: start httpd  service: name=httpd state=started enabled=true

vim /etc/ansible/roles/database/tasks/main.yml

- name: install mysql  yum: name=mysql-server state=present  when: ansible_distribution_major_version == "6"- name: install mariadb  yum: name=mariadb-server state=present  when: ansible_distribution_major_version == "7"- name: install conf file  template: src=db.conf.j2 dest=/etc/my.cnf- name: start mysql  service: name=mysqld state=started enabled=true  when: ansible_distribution_major_version == "6"- name: start mariadb  service: name=mariadb state=started enabled=true  when: ansible_distribution_major_version == "7"

cd /etc/ansible/roles/

vim keepalived/templates/keepalived.conf.j2

vrrp_instance VI_1 {    state MASTER    interface eno16777736    virtual_router_id 51    priority 150    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.152.190    }}vrrp_instance VI_2 {    state BACKUP    interface eno16777736    virtual_router_id 151    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.152.191    }}

vim nginx/templates/nginx.conf.j2

http {    upstream webservers {        server 192.168.152.142:80;        server 192.168.152.143:80;    }    location / {                proxy_pass http://webservers;        }｝

vim apachephp/templates/http.conf.j2

 DirectoryIndex index.html index.php

vim apachephp/templates/html.index.j2

192.168.152.142

vim database/templates/db.conf.j2

[mysqld]innodb_file_per_table = ONskip_name_resolve = ON

调用roles

mkdir /etc/ansible/yml
vim /etc/ansible/yml/keepalived.yml

- hosts: nginx  remote_user: root  roles:  - keepalived

vim /etc/ansible/yml/nginx.yml

- hosts: nginx  remote_user: root  roles:  - nginx

vim /etc/ansible/yml/apachephp.yml

- hosts: ap  remote_user: root  roles:  - apachephp

vim /etc/ansible/yml/database.yml

- hosts: db  remote_user: root  roles:  - database

测试

ansible-playbook --check /etc/ansible/yml/keepalived.yml
ansible-playbook --check /etc/ansible/yml/nginx.yml
ansible-playbook --check /etc/ansible/yml/apachephp.yml
ansible-playbook --check /etc/ansible/yml/database.yml

运行

ansible-playbook /etc/ansible/yml/keepalived.yml
ansible-playbook /etc/ansible/yml/nginx.yml
ansible-playbook /etc/ansible/yml/apachephp.yml
ansible-playbook /etc/ansible/yml/database.yml

完成后需要做微调

192.168.152.141        #主主高可用，140为190主，191备；141为191主，190备

vim /etc/keepalived/keepalived.conf

vrrp_instance VI_1 {    state BACKUP    interface eno16777736    virtual_router_id 51    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.152.190    }}vrrp_instance VI_2 {    state MASTER    interface eno16777736    virtual_router_id 151    priority 150    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.152.191    }}

192.168.152.143        #为区别与142主页内容，更改IP显示

vim /var/www/html/index.php

192.168.152.143

192.168.152.144        #为root授权管理数据库权限，设置密码便于远程测试连通性

mysql
grant all privileges on . to 'root'@'192.168.%.%' identified by '12345678'

完成后可通过关闭其中一台主机keepalived服务，查看ip address list观察虚拟地址漂移

关闭其中一台主机HTTP服务，查看网页是否可继续访问即可。