实战作业：
(1) 主/备模型的keepalived+nginx
(2) httpd+php+php-mysql
(3) mysql-server或mariadb-server
拥有testdb库，并允许testuser对其拥有所有权限
实验环境：
主机1：10.1.43.1 CentOS6系统 作为keepalived+nginx的主机
主机2：10.1.43.2 CentOS6系统 作为keepalived+nginx的主机
主机3：10.1.43.3 CentOS6系统 作为amp的主机
主机4：10.1.43.101 CentOS7系统 作为amp的主机
主机5：10.1.43.4 CentOS6系统 作为ansible的主机
实验拓扑：
实验先决条件：
配置ansible基于ssh会话进行
1、生成ssh会话的密钥
[root@node4 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Passphrases do not match. Try again. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in y. Your public key has been saved in y.pub. The key fingerprint is: 53:10:3d:da:7b:9b:21:f2:60:0c:d0:d8:98:96:32:c1 root@node1 The key's randomart image is: +--[ RSA 2048]----+ | ... B oo | | E B o .o | | + . o.. | | . ... | | oS . | | =.o o | | . + o + | | . o | | | +-----------------+2、修改/etc/hosts文件
[root@node4 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 10.1.43.1 node1 10.1.43.2 node2 10.1.43.3 node3 10.1.43.101 node113、修改/etc/ansible/hosts文件：
[root@node4 ~]# cat /etc/ansible/hosts [websrvs] 10.1.43.3 10.1.43.101 [knsrvs] 10.1.43.1 STATE=MASTER PRI=100 10.1.43.2 STATE=BACKUP PRI=984、cp会话密钥到所有的node节点主机
[root@node4 ~]# ssh-copy-id node1 #node2,3,11节点的cp同此处 The authenticity of host 'node1 (10.1.43.1)' can't be established. RSA key fingerprint is ae:28:af:a3:ae:b5:35:cc:93:90:54:30:92:17:e9:65. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@node1's password: #输入node1节点的密码 Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'node1'" and check to make sure that only the key(s) you wanted were added.5、安装keepalived和nginx服务，以便ansible过程中需要使用其配置文件
[root@node4 ~]# yum -y install keepalived [root@node4 ~]# rpm -ivh nginx-1.10.0-1.el6.ngx.x86_64.rpm #此nginx包从nginx官网获的
实验过程：
1、配置各roles
[root@node4 ~]# cd /etc/ansible/roles/ [root@node4 roles]# pwd /etc/ansible/roles [root@node4 roles]# tree ./ ./ ├── amp │ ├── default │ ├── files │ │ └── db.sh │ ├── handlers │ ├── meta │ ├── tasks │ │ └── main.yml │ ├── templates │ └── vars ├── keepalived │ ├── default │ ├── files │ │ └── keepalived.conf.j2 │ ├── handlers │ │ └── main.yml │ ├── meta │ ├── tasks │ │ └── main.yml │ ├── templates │ └── vars └── nginx ├── default ├── files │ └── default.conf.j2 ├── handlers │ └── main.yml ├── meta ├── tasks │ └── main.yml ├── templates │ └── nginx.conf.j2 └── vars
keepalived的配置：
[root@node4 roles]# cat keepalived/tasks/main.yml - name: install keepalived package yum: name=keepalived - name: copy keepalived conf file template: src=keepalived.conf.j2 dest=/etc/keepalived/keepalived.conf tags: keepalivedconf notify: restart keepalived server - name: start keepalived server service: name=keepalived state=started enabled=on [root@node4 roles]# cat keepalived/handlers/main.yml - name: restart keepalived server service: name=keepalived state=restarted [root@node4 roles]# cat keepalived/files/keepalived.conf.j2 #该文件为keepalived的主配置文件备份而来 ! Configuration File for keepalived global_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node1 vrrp_mcast_group4 224.0.43.100 } vrrp_script ngx_server { script "killal -0 nginx" interval 1 weight -5 } vrrp_instance VI_1 { state {{ STATE }} interface eth0 virtual_router_id 43 priority {{ PRI }} advert_int 1 track_script ngx_server authentication { auth_type PASS auth_pass 571f97b2 } virtual_ipaddress { 10.1.43.100/16 dev eth0 } }
nginx的配置：
[root@node4 roles]# cat nginx/tasks/main.yml - name: install nginx package yum: name=nginx - name: copy configure file template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf tags: ngxconf notify: reload nginx server - name: copy default file copy: src=default.conf.j2 dest=/etc/nginx/conf.d/default.conf tags: ngxconf notify: reload nginx server - name: start nginx server service: name=nginx state=started enabled=on [root@node4 roles]# cat nginx/templates/nginx.conf.j2 #该文件为nginx的主配置文件备份而来 user nginx; worker_processes {{ ansible_processor_vcpus }}; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; 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; upstream amp { server 10.1.43.3; server 10.1.43.101; } sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; # Load config files from the /etc/nginx/conf.d directory # The default server is in conf.d/default.conf include /etc/nginx/conf.d/*.conf; } [root@node4 roles]# cat nginx/files/default.conf.j2 #该文件为nginx的默认的服务配置文件备份而来 server { listen 80 default_server; server_name _; include /etc/nginx/default.d/*.conf; location / { root /usr/share/nginx/html; proxy_pass http://amp; index index.html index.htm; } error_page 404 /404.html; location = /404.html { root /usr/share/nginx/html; } error_page 500 502 503 504 /50x.html; location = /50x.html { root /usr/share/nginx/html; } }
amp的配置：
[root@node4 roles]# cat amp/tasks/main.yml - name: install apache-php-mysql some package on CentOS 6 yum: name={{ item }} with_items: - httpd - mysql-server - php - php-mysql when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '6' - name: install apache-php-mysql some package on CentOS 7 yum: name={{ item }} with_items: - httpd - mariadb-server - php - php-mysql when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '7' - name: start apm server service: name={{ item }} state=started enabled=on with_items: - httpd - mysqld when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '6' - name: start apm server service: name={{ item }} state=started enabled=on with_items: - httpd - mariadb when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '7' - name: create DB script: db.sh [root@node4 roles]# cat amp/files/db.sh #创建testdb数据库，和授权用户访问 #!/bin/bash # mysql -e " CREATE DATABASE testdb" mysql -e " GRANT ALL ON testdb.* TO 'testuser'@'localhost' IDENTIFIED BY 'gm'" mysql -e " GRANT ALL ON testdb.* TO 'testuser'@'127.0.0.1' IDENTIFIED BY 'gm'"
2、创建主配置文件，并且调用roles：
[root@node4 ~]# cat aknamp.yaml - hosts: knsrvs remote_user: root roles: - keepalived - nginx - hosts: websrvs remote_user: root roles: - amp
3、运行此yaml文件
[root@node4 ~]# ansible-playbook aknamp.yaml PLAY [knsrvs] **************************************************************** GATHERING FACTS *************************************************************** ok: [10.1.43.1] ok: [10.1.43.2] TASK: [keepalived | install keepalived package] ******************************* changed: [10.1.43.1] changed: [10.1.43.2] TASK: [keepalived | copy keepalived conf file] ******************************** changed: [10.1.43.1] changed: [10.1.43.2] TASK: [keepalived | start keepalived server] ********************************** changed: [10.1.43.2] changed: [10.1.43.1] TASK: [nginx | install nginx package] ***************************************** changed: [10.1.43.2] changed: [10.1.43.1] TASK: [nginx | copy configure file] ******************************************* changed: [10.1.43.2] changed: [10.1.43.1] TASK: [nginx | copy default file] ********************************************* changed: [10.1.43.2] changed: [10.1.43.1] TASK: [nginx | start nginx server] ******************************************** changed: [10.1.43.2] changed: [10.1.43.1] NOTIFIED: [keepalived | restart keepalived server] **************************** changed: [10.1.43.2] changed: [10.1.43.1] NOTIFIED: [nginx | reload nginx server] *************************************** changed: [10.1.43.2] changed: [10.1.43.1] PLAY [websrvs] ************************************************************** GATHERING FACTS *************************************************************** ok: [10.1.43.3] ok: [10.1.43.101] TASK: [amp | install apache-php-mysql some package on CentOS 6] *************** skipping: [10.1.43.101] changed: [10.1.43.3] => (item=httpd,mysql-server,php,php-mysql) TASK: [amp | install apache-php-mysql some package on CentOS 7] *************** skipping: [10.1.43.3] changed: [10.1.43.101] => (item=httpd,mariadb-server,php,php-mysql) TASK: [amp | start apm server] ************************************************ skipping: [10.1.43.101] => (item=httpd) skipping: [10.1.43.101] => (item=mysqld) changed: [10.1.43.3] => (item=httpd) changed: [10.1.43.3] => (item=mysqld) TASK: [amp | start apm server] ************************************************ skipping: [10.1.43.3] => (item=httpd) skipping: [10.1.43.3] => (item=mariadb) changed: [10.1.43.101] => (item=httpd) changed: [10.1.43.101] => (item=mariadb) TASK: [amp | create DB] ******************************************************* changed: [10.1.43.101] changed: [10.1.43.3] PLAY RECAP ******************************************************************** 10.1.43.1 : ok=10 changed=9 unreachable=0 failed=0 10.1.43.101 : ok=5 changed=3 unreachable=0 failed=0 10.1.43.2 : ok=10 changed=9 unreachable=0 failed=0 10.1.43.3 : ok=5 changed=3 unreachable=0 failed=0
4、配置node3和node11的web默认页面：
[root@node3 ~]# cat /var/www/html/index.html <h1>www.gm.com</h1> <h2>test page</h2> <h2>hello world</h2> [root@node11 ~]# cat /var/www/html/index.html <h1>RS1 CentOS7</h1>
5、验证实验结果：
验证keepalived的虚拟ip地址，是否在node1主机上：
[root@node1 ~]# ip a l 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:50:56:28:be:8a brd ff:ff:ff:ff:ff:ff inet 10.1.43.1/16 brd 10.1.255.255 scope global eth0 inet 10.1.43.100/16 scope global secondary eth0 inet6 fe80::250:56ff:fe28:be8a/64 scope link tentative dadfailed valid_lft forever preferred_lft forever验证nginx的调度是否正常：
[root@node4 ~]# curl 10.1.43.100 <h1>RS1 CentOS7</h1> [root@node4 ~]# curl 10.1.43.100 <h1>www.gm.com</h1> <h2>test page</h2> <h2>hello world</h2> [root@node4 ~]# curl 10.1.43.100 <h1>RS1 CentOS7</h1> [root@node4 ~]# curl 10.1.43.100 <h1>www.gm.com</h1> <h2>test page</h2> <h2>hello world</h2>验证数据库是否创建成功：
[root@node3 ~]# mysql -hlocalhost -utestuser -pgm Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | testdb | +--------------------+ 2 rows in set (0.00 sec) [root@node11 ~]# mysql -hlocalhost -utestuser -pgm Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 5 Server version: 5.5.44-MariaDB MariaDB Server Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | testdb | +--------------------+ 2 rows in set (0.00 sec)
原创文章，作者：megedugao，如若转载，请注明出处：http://www.178linux.com/58180
