ansible-playbook安裝keepalived-指定tags安裝MASTER或BACKUP
阿新 • • 發佈：2018-04-13
ansible-playbook keepalived 在實際工作中，新項目上線往往都需要搭建HA，此時我們可以通過ansible的playbook來秒級搭建好一個HA環境，從而解放雙手；
此playbook適用於centos6、centos7的keepalived搭建，但是請註意var/main.yml中變量的修改，修改為你自己想的設定的配置；
playbook的目錄結構：
[root@shvpuppet01 roles]# tree keepalived/
keepalived/
├── files
│ ├── check_nginx.sh
│ └── notify.sh
├── handles
├── meta
├── tasks
│ ├── keepalived_backup.yml
│ ├── keepalived_master.yml
│ └── main.yml
├── templates
│ ├── keepalived_backup.conf.j2
│ └── keepalived_master.conf.j2
└── vars
└── main.yml
6 directories, 8 files
文件說明：
check_nginx.sh：用於檢查nginx是否存活，如果nginx不存活，剛keepalived權重降級20，VIP將發生切換
notify.sh：當VIP切換發生後，郵件通知相關用戶
keepalived_master.yml：keepalived MASTER節點的安裝任務
keepalived_backup.yml：keepalived BACKUP節點的安裝任務
tasks/main.yml：將要執行的任務include在此文件中，並同時指定tags對各安裝任務進行區別
keepalived_master.conf.j2：MASTER節點的模板配置文件
keepalived_backup.conf.j2：BACKUP節點的模板配置文件
vars/main.yml：所以變量都定義在此文件中check_nginx.sh的內容：
#!/bin/bash port=80 nmap localhost -p $port | grep "$port/tcp open" if [ $? -ne 0 ];then exit 10 fi
notify.sh的內容：
#!/bin/bash
VIP=$2
sendmail (){
maillist=(
[email protected]
)
if [ "$1" == "master" ];then
subject="${VIP}'s server keepalived state is translate"
content="`date +'%F %T'`: `hostname`'s state change to master"
for mail in ${maillist[*]};do
echo $content | mail -s "$subject" $mail
done
elif [ "$1" == "backup" ];then
subject="${VIP}'s server keepalived state is translate"
content="`date +'%F %T'`: `hostname`'s state change to backup"
for mail in ${maillist[*]};do
echo $content | mail -s "$subject" $mail
done
fi
}
case "$1" in
master)
sendmail master
;;
backup)
sendmail backup
;;
*)
echo "Usage:$0 master|backup VIP"
;;
esackeepalived_master.conf.j2模板的配置內容：
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id {{ ROUTE_ID }}
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 1
weight -20
}
vrrp_instance VI_1 {
state {{ MASTER }}
interface {{ INTERFACE }}
virtual_router_id {{ VIRTUAL_ROUTE_ID }}
priority {{ PRIOTIRY_MASTER }}
advert_int 1
authentication {
auth_type {{ AUTH_TYPE }}
auth_pass {{ AUTH_PASS }}
}
virtual_ipaddress {
{{ VIRTUAL_IP }}/25
}
track_script {
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master {{ VIRTUAL_IP }}"
notify_backup "/etc/keepalived/notify.sh backup {{ VIRTUAL_IP }}"
}keepalived_backup.conf.j2模板的配置內容：
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id {{ ROUTE_ID }}
}
vrrp_instance VI_1 {
state {{ BACKUP }}
interface {{ INTERFACE }}
virtual_router_id {{ VIRTUAL_ROUTE_ID }}
priority {{ PRIOTIRY_BACKUP }}
advert_int 1
authentication {
auth_type {{ AUTH_TYPE }}
auth_pass {{ AUTH_PASS }}
}
virtual_ipaddress {
{{ VIRTUAL_IP }}/25
}
notify_master "/etc/keepalived/notify.sh master {{ VIRTUAL_IP }}"
notify_backup "/etc/keepalived/notify.sh backup {{ VIRTUAL_IP }}"
}vars/main.yml變量的內容：
--- MASTER: "MASTER" BACKUP: "BACKUP" PRIOTIRY_MASTER: "100" PRIOTIRY_BACKUP: "90" VIRTUAL_ROUTE_ID: "80" VIRTUAL_IP: "10.10.5.99" AUTH_TYPE: "pass" AUTH_PASS: "111111" ROUTE_ID: "TEST" INTERFACE: "ens160"
keepalived_master.yml任務的內容：
---
- name: "安裝keepalived"
yum:
name: keepalived
state: present
- name: "復制檢測、通知腳本"
copy:
src={{ item }}
dest=/etc/keepalived/
mode=755
with_items:
- check_nginx.sh
- notify.sh
- name: "復制配置文件"
template:
src=keepalived_master.conf.j2
dest=/etc/keepalived/keepalived.conf
- name: "配置keepalived日誌格式"
lineinfile:
path: /etc/sysconfig/keepalived
regexp: 'KEEPALIVED_OPTIONS="-D"'
line: 'KEEPALIVED_OPTIONS="-D -S 3"'
backrefs: no
- name: "創建日誌目錄"
file:
path: /var/log/keepalived
state: directory
- name: "配置rsyslog中關於keepalived的"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'local7.* /var/log/boot.log'
line: 'local3.* /var/log/keepalived/keepalived.log'
- name: "配置日誌的udp"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'UDPServerRun 514'
line: '$ModLoad imudp'
- name: "配置日誌的udp"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'UDPServerRun 514'
line: '$UDPServerRun 514'
- name: "重啟日誌"
service:
name=rsyslog
state=restarted
- name: "啟動keepalived,設置開機自動啟動"
service:
name=keepalived
state=started
enabled=yeskeepalived_backup.yml任務的內容：
---
- name: "安裝keepalived"
yum:
name: keepalived
state: present
- name: "復制檢測、通知腳本"
copy:
src={{ item }}
dest=/etc/keepalived/
mode=755
with_items:
- notify.sh
- name: "復制配置文件"
template:
src=keepalived_backup.conf.j2
dest=/etc/keepalived/keepalived.conf
- name: "配置keepalived日誌格式"
lineinfile:
path: /etc/sysconfig/keepalived
regexp: 'KEEPALIVED_OPTIONS="-D"'
line: 'KEEPALIVED_OPTIONS="-D -S 3"'
backrefs: no
- name: "創建日誌目錄"
file:
path: /var/log/keepalived
state: directory
- name: "配置rsyslog中關於keepalived的"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'local7.* /var/log/boot.log'
line: 'local3.* /var/log/keepalived/keepalived.log'
- name: "配置日誌的udp"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'UDPServerRun 514'
line: '$ModLoad imudp'
- name: "配置日誌的udp"
lineinfile:
path: /etc/rsyslog.conf
insertafter: 'UDPServerRun 514'
line: '$UDPServerRun 514'
- name: "重啟日誌"
service:
name=rsyslog
state=restarted
- name: "啟動keepalived,設置開機自動啟動"
service:
name=keepalived
state=started
enabled=yestasks/main.yml內容：
--- - include: keepalived_master.yml tags: master - include: keepalived_backup.yml tags: backup
如何執行安裝：
MASTER安裝命令：ansible-playbook keepalived.yml --tags master
BACKUP安裝命令：ansible-playbook keepalived.yml --tags backup
ansible-playbook安裝keepalived-指定tags安裝MASTER或BACKUP