实验环境
ansible节点
keepalived+nginx节点1 ansible自动安装配置
keepalived+nginx节点2 ansible自动安装配置
httpd节点1
httpd节点2
ansible配置
yum install epel-release
yum install ansible
安装ansible
vi /etc/ansible/hosts [nginxsrv]
172.20.128.42
172.20.128.43 [keepalivedsrv]
172.20.128.42
172.20.128.43 #配置免密钥登录连接
[root@localhost .ssh]# ssh-keygen
[root@localhost .ssh]# ssh-copy-id 172.20.128.42
[root@localhost .ssh]# ssh-copy-id 172.20.128.43
[root@localhost .ssh]# ansible nginxsrv -m ping #指定使用密码连接测试 -k
[root@localhost .ssh]# ansible nginxsrv -m ping -k
添加主机清单
编写ansible角色脚本
[root@localhost ~]# ls
HAnginx
[root@localhost ~]# cd HAnginx/
[root@localhost HAnginx]# ls
roles start.yaml
[root@localhost HAnginx]# cd roles
[root@localhost roles]# ls
keepalived nginx
[root@localhost roles]# cd nginx
[root@localhost nginx]# ls
tasks templates vars handlers
[root@localhost roles]# cd keepalived/
[root@localhost keepalived]# ls
tasks templates vars handlers
角色目录结构
keepalived角色配置
vips:
- vip1:
master: node1
interface: ens33
vip: 172.20.103.88/
instance: VI_1
routeid:
- vip2:
master: node2
interface: ens33
vip: 172.20.103.99/
instance: VI_2
routeid: 这个文件中变量由ansible自动传递到模板中,因此可以在template中直接引用
vars/main.yaml
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
root@localhost
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_iptables
vrrp_garp_interval
vrrp_gna_interval
vrrp_mcast_group4 224.0.103.103
}
vrrp_script ngxhealth {
script "killall -0 nginx && exit 0 || exit 1"
interval
weight -
}
vrrp_script checkdown {
script "/bin/bash -c '[[ -f /etc/keepalived/down ]]' && exit 1 || exit 0"
interval
weight -
}
{% for v in vips %}
vrrp_instance {{ v["instance"] }} {
{% if v["master"] == ansible_nodename %}
state MASTER
priority
{% else %}
state BACKUP
priority
{% endif %}
interface {{ v["interface"] }}
virtual_router_id {{ v["routeid"] }}
advert_int
authentication {
auth_type PASS
auth_pass
}
virtual_ipaddress {
{{ v["vip"] }}
}
track_interface {
{{ v["interface"] }}
}
track_script {
ngxhealth
checkdown
}
}
{% endfor %}templates/keepalived.conf.j2
vi yum.yaml - name: install keepalived
yum: name=keepalived vi tmpl.yaml - name: copy keepalived conf
template: src=keepalived.conf.j2 dest=/etc/keepalived/keepalived.conf vi start.yaml - name: start keepalived
service: name=keepalived state=started enabled=yes vi main.yaml - include: yum.yaml
- include: tmpl.yaml
- include: start.yaml
tasks目录下文件
nginx角色配置
websrv1: 172.20.128.33
webport1:
websrv2: 172.20.128.34
webport2:
vars/main.yaml
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/ user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid; # Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf; events {
worker_connections 1024;
} http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048; include /etc/nginx/mime.types;
default_type application/octet-stream; # Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf; server {
listen 80;
listen [::]:80;
server_name _;
root /usr/share/nginx/html; # Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf; location / {
} error_page 404 /404.html;
location = /40x.html {
} error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
} # Settings for a TLS enabled server.
#
# server {
# listen 443 ssl http2 default_server;
# listen [::]:443 ssl http2 default_server;
# server_name _;
# root /usr/share/nginx/html;
#
# ssl_certificate "/etc/pki/nginx/server.crt";
# ssl_certificate_key "/etc/pki/nginx/private/server.key";
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 10m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
#
# # Load configuration files for the default server block.
# include /etc/nginx/default.d/*.conf;
#
# location / {
# }
#
# error_page 404 /404.html;
# location = /40x.html {
# }
#
# error_page 500 502 503 504 /50x.html;
# location = /50x.html {
# }
# } }
templates/nginx.conf.j2
upstream websrvs {
server {{ websrv1 }}:{{ webport1 }};
server {{ websrv2 }}:{{ webport2 }};
}
server {
listen default_server;
server_name www.a.com;
root /usr/share/nginx/html;
location /{
proxy_pass http://websrvs;
}
}templates/www.conf.j2
vi yum.yaml
- name: install nginx
yum: name=nginx [root@localhost tasks]# cat templ.yaml
- name: copy nginx conf
template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf - name: copy www conf
template: src=www.conf.j2 dest=/etc/nginx/conf.d/www.conf [root@localhost tasks]# cat start.yaml
- name: start nginx
service: name=nginx state=started enabled=yes [root@localhost tasks]# cat main.yaml
- include: yum.yaml
- include: templ.yaml
- include: start.yaml
tasks目录下文件
启动执行角色
[root@localhost HAnginx]# ls
roles start.yaml
[root@localhost HAnginx]# ansible-playbook start.yaml #roles目录下的文件
[root@localhost HAnginx]# cd roles
[root@localhost roles]# ls
keepalived nginx
[root@localhost roles]#
启动目录
注意点
在模板中 {% if v["master"] == ansible_nodename %} 不能写成 {% if v["master"] == {{ ansible_nodename }} %}
只有需要输出变量的值的时候才能写成 {{ ansible_nodename }} 进行变量比较的时候直接写成 ansible_nodename 即可
可以把所有的变量定义在每个角色目录下的/vars/main.yaml文件中,然后可以直接在j2模板中引用这里面的变量名称,j2根据变量和相关业务动态生成各种配置文件传送到相关主机
[root@localhost HAnginx]# ansible all -m setup | grep hostname
"ansible_hostname": "node2",
"ansible_hostname": "node1",
ansible all -m setup -a "filter=ansible_hostname"
使用default()默认值
当我们定义了变量的值时,采用变量的值,当我们没有定义变量的值时,那么使用默认给定的值
[root@master ansible]# cat roles/temp/templates/test_default.j2
Listen: {{ server_port|default(80) }}