标签：sql tst 判断 name secret priority symbol master exp
jinja2跟ansible的关系
Ansible通常会使用jinja2模板来修改被管理主机的配置文件等...在saltstack中同样会使用到jinja2
为了方便，使用jinja2语法，渲染配置文件
{{ EXPR }}输出变量值，会输出自定义的变量值或facts
1)playbook文件使用template模块
2)模板文件里面变量使用{{名称}}，比如{{PORT}}或使用facts
## 调用变量
{{ 变量名 }} ## jinja2会自动把带有{{ 变量名 }} 替换成变量值
## 模板文件：也就是我们的配置文件（要推送的文件，并且文件中需要变量）
## 模板文件里的变量
1.可以调用自己设置的web_user_group: www
{{ web_user_group }}
2.可以调用facts变量:ansible web01 -m setup
{{ ansible_fqdn }} ## 获取主机名
{{ ansible_memtotal_mb }} ## 获取总内存大小
案例：MySQL根据物理主机的内存大小，来设置分配的内存空间
MySQL占物理内存的 75% ~ 80%
## 逻辑判断语法：
注释：{# 被注释的内容 #}
循环：{% for 变量名 in range(1,101) %}
{{ 变量名 }}
{% endfor %}
判断:
{% if ansible_fqdn == ‘db01‘ %}
mem=16G
{% elif ansible_fqdn == ‘db02‘ %}
mem=8G
{% else %}
mem=4G
{% endif %}
{# 直接调用变量的方式 #}
[root@m01 ~]# cat motd.j2
欢迎来到红浪漫
总共技师个数： {{ ansible_memtotal_mb }}
剩余技师个数： {{ ansible_memfree_mb }}
红浪漫浦东新区地址： {{ ansible_eth0[‘ipv4‘][‘address‘] }}
[root@m01 ~]# cat push_motd.yml
- hosts: all
tasks:
- name: Push Motd File
template:
src: ./motd.j2
dest: /etc/motd
[root@m01 ~]# cat proxy.conf
upstream web {
{# 下面的循环是1-100的IP #}
{% for num in range(1,101) %}
server 10.0.0.{{ num }}:{{ backend_port }}
{% endfor %}
}
server {
listen {{ port }};
{% if ansible_hostname == ‘web01‘ %}
server_name {{ domain_name1 }};
{% elif ansible_hostname == ‘web02‘ %}
server_name {{ domain_name2 }};
{% else %}
server_name {{ domain_name3 }};
{% endif %}
location / {
proxy_pass http://web;
proxy_set_header Host $host;
}
}
[root@m01 ~]# cat a.yml
- hosts: web_group
vars:
- backend_port: 8080
- port: 80
tasks:
- name: config nginx conf
template:
src: ./proxy.conf
dest: /root
{# keepalived的配置文件 #}
global_defs {
router_id lb01
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 50
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3
}
}
global_defs {
router_id lb02
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 50
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3
}
}
{# 把keepalived配置文件改成模板文件 #}
global_defs {
router_id {{ ansible_fqdn }}
}
vrrp_instance VI_1 {
{% if ansible_fqdn == ‘lb01‘ %}
state MASTER
priority 150
{% elif ansible_fqdn == ‘lb02‘ %}
state BACKUP
priority 100
{% endif %}
interface eth0
virtual_router_id 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3
}
}
{# 推送的文件 #}
[root@m01 ~]# vim a.yml
- hosts: lb_group
vars:
tasks:
- name: config keep conf
template:
src: ./keep.conf
dest: /root
- name: xxx shell
copy:
src:
dest:
when: ansible_fqdn == ‘lb01‘
{# 安装配置MySQL #}
- hosts: db_group
tasks:
- name: i m
yum:
name:
- mariadb-server
- MySQL-python
state: present
- name: t c
template:
src: ./my.j2
dest: /etc/my.cnf
{# MySQL的模板文件 #}
[root@m01 ~]# vim my.j2
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
innodb_buffer_pool_size = {{ (ansible_memtotal_mb * 80 / 100)|int }}
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
!includedir /etc/my.cnf.d
官方推荐目录层级
[root@m01 roles]# tree wordpress/
wordpress/ #项目名称
├── defaults #低优先级变量
├── files #存放文件
├── handlers #触发器文件
├── meta #依赖关系文件
├── tasks #工作任务文件
├── templates #jinja2模板文件
├── tests #测试文件
└── vars #变量文件
# 1.创建一个roles的项目
[root@m01 roles]# ansible-galaxy init rsync
[root@m01 roles]# tree rsync/
rsync/
├── defaults
│?? └── main.yml
├── files
├── handlers
│?? └── main.yml
├── meta
│?? └── main.yml
├── README.md
├── tasks
│?? └── main.yml
├── templates
├── tests
│?? ├── inventory
│?? └── test.yml
└── vars
└── main.yml
# 2.维护roles中的主机清单
[root@m01 roles]# cat /etc/ansible/roles/hosts
[web_group]
web01 ansible_ssh_host=10.0.0.7
web02 ansible_ssh_host=10.0.0.8
[lb_group]
lb01 ansible_ssh_host=10.0.0.5
lb02 ansible_ssh_host=10.0.0.6
[backup_group]
backup ansible_ssh_host=10.0.0.41
[nfs_group]
nfs ansible_ssh_host=10.0.0.31
[db_group]
db01 ansible_ssh_host=10.0.0.51
db02 ansible_ssh_host=10.0.0.52
[install_nfs:children]
web_group
nfs_group
[install_rsync:children]
nfs_group
backup_group
# 写一个ansible roles入口文件，必须命名site.yml
[root@m01 roles]# vim site.yml
- hosts: all
roles:
## 按照目录名来写
- rsync
when: anisble_fqdn == ‘backup‘
## 准备rsync的配置文件
[root@m01 rsync]# cat templates/rsyncd.j2
uid = www
gid = www
port = 873
fake super = yes
use chroot = no
max connections = 200
timeout = 600
ignore errors
read only = false
list = false
auth users = {{ ansible_fqdn }}
secrets file = /etc/rsync.passwd
log file = /var/log/rsyncd.log
#####################################
[backup]
comment = welcome to oldboyedu backup!
path = /backup
## 编写rsync安装文件
[root@m01 rsync]# vim tasks/install_rsync.yml
- name: Install Rsync Server
yum:
name: rsync
state: present
## 编写rsync的配置
[root@m01 rsync]# vim tasks/config_rsync.yml
- name: Configure Rsync Config
template:
src: rsyncd.j2
dest: /etc/rsyncd.conf
notify: Restart Rsync
## 编写rsync启动文件
[root@m01 rsync]# vim tasks/start_rsync.yml
- name: Start Rsync Server
service:
name: rsyncd
state: started
enabled: true
## 编写触发器
[root@m01 rsync]# vim handlers/main.yml
# handlers file for rsync
- name: Restart Rsync
service:
name: rsyncd
state: restarted
标签：sql tst 判断 name secret priority symbol master exp
原文地址：https://www.cnblogs.com/jkz1/p/13170874.html
