十三周

Posted 2021-12-13 冯永庆的博客

1、ansible-playbook实现mysql的二进制部署

安装ansible
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y epel-release
yum -y install ansible
安装mysql
下载软件包
https://downloads.mysql.com/archives/community/mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz
修改
hostnamectl set-hostname dbsrvs

mkdir -p mysql_install/{files,handlers,meta,tasks,templates,vars}
mv /mnt/mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz /etc/ansible/roles/mysql_install/files/

cd  /etc/ansible/roles/mysql_install/files
[root@dbsrvs files]# cat secure_mysql.sh 
#!/bin/bash
/usr/local/mysql/bin/mysql_secure_installation <<EOF
y
fyq939
fyq939
y
y
y
y
EOF
[root@dbsrvs files]# tree  /etc/ansible/roles/mysql_install/files/
/etc/ansible/roles/mysql_install/files/
├── install_mysql.yml
├── my.cnf
├── mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz
└── secure_mysql.sh

[root@dbsrvs files]# cat install_mysql.yml 

---

- hosts: dbsrvs
  remote_user: root
  gather_facts: no

  tasks:
   - name: install packages
     yum: name=libaio, perl-Data-Dumper, perl-Getopt-Long
   - name: create mysql group
     group: name=mysql gid 333
   - name: create mysql user
     user: name=mysql uid 333 group=mysql shell=/sbin/nologin system=yes create_home=no home=/data/mysql
   - name: copy tar to remote host and file mode
     unarchive: src=/etc/ansible/roles/mysql_install/files/mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz dest=/usr/local/ owner=root group=root
   - name: create linkfile /usr/local/mysql
     file: src=/usr/local/mysql-5.6.46-linux-glibc2.12-x86_64 dest=/usr/local/mysql state=link
   - name: data dir
     shell: chdir=/usr/local/mysql/ ./scripts/mysql_install_db --datadir=/data/mysql --user=mysql
     tags: data
   - name: config my.cnf
     copy: src=/etc/ansible/roles/mysql_install/files/my.cnf dest=/etc/my.cnf
   - name: service script
     shell: /bin/cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
   - name: enable service
     shell: /etc/init.d/mysqld start;chkconfig --add mysqld;chkconfig mysqld on
     tags: service
   - name: PATH variable
     copy: content=PATH=/usr/local/mysql/bin:$PATH dest=/etc/profile.d/mysql.sh
   - name: secure script
     script: /etc/ansible/roles/mysql_install/files/secure_mysql.sh
     tags: script

#### 2、Ansible playbook实现apache批量部署,并对不同主机提供以各自IP地址为内容的index.html

vim install-httpd.yml

• hosts: websrvs
  remote_user:root
  gather_facts: no

  tasks:

  • name: Install httpd
    yum: name=httpd state=present
  • name: Install configure file
    copy: src=files/httpd.conf dest=/etc/httpd/conf/
  • name: modify config
    lineinfile: path=/etc/httpd/conf/httpd.conf regexp=^Listen line=Listen 8080
  • name: mkdir website dir
    file: path=/data/html state=directory
  • name: web html
    copy: src=files/index.html dest=/data/html/
  • name: start service

#### 3、http的报文结构和状态码总结

请求报文格式：

<method><request-URL><version>
<headers>
<entity-body>

响应报文的格式：

<version><status><reason-phrase>
<headers>
<entiy-body>

首部（headers）：
可以有零个或者多个首部，每个首部都包含一个名字，后面跟着一个冒号（:），然后是一个可选的空格，接着是一个值，最后是一个回车换行。首部是由一个回车换行结束的，表示了首部列表的结束和实体主体不部分的开始。有些HTTP版本中，比如 HTTP/1.1，要求有效的请求和响应报文中必须包含特定的首部。

实体的主体部分（entity-body）：
实体的主体部分包含一个由任意数据组成的数据块，并不是所有的报文都包含实体的主体部分。

![image.png](https://s2.51cto.com/images/20211205/1638677897499984.png?x-oss-process=image/watermark,size_14,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_20,type_ZmFuZ3poZW5naGVpdGk=)