部署BBS, ansible安装使用, Docker的安装与pull

一. 部署BBS

项目文件导入:

项目放到opt下, 下面的day1130为项目名
将数据转为sql文件放到opt下

创建bbs数据库, 并运行sql文件写入数据

mysql> create database bbs charset utf8mb4;
mysql> use bbs
mysql> ource /opt/bbs.sql

修改settings.py的数据库配置

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'bbs',
        'HOST': "10.0.0.100",
        'USER': 'bbs',
        'PASSWORD': '123',
        'PORT': 3306,
    }
}

创建mysql的bbs用户

mysql> grant select,update,delete ,insert on bbs.* to bbs@'10.0.0.%' identified by '123';

测试: 
mysql -ubbs -p123 -h10.0.0.100

配置nginx

vim /etc/nginx/conf.d/py.conf



server {
listen 80;
server_name 10.0.0.100;
client_max_body_size 100M;

location  /static {
alias /opt/day1130/static/;
}

location /media {
alias /opt/day1130/media;
}

location / {
index index.html;
include uwsgi_params;
uwsgi_pass 127.0.0.1:9091;

# 这里配置的day1130是settings.py所在的文件夹.wsgi
uwsgi_param UWSGI_SCRIPT day1130.wsgi;

# 这里配置的项目根目录的路径
uwsgi_param UWSGI_CHDIR /opt/day1130;
}
}

配置uwsgi

关闭所有已有的uwsgi进程:
kill -9 `ps -ef |grep uwsgi|awk {'print $2'}`

写配置文件:
vim  /opt/day1130/uwsgi.ini

[uwsgi]
socket = 127.0.0.1:9091
master = true
workers = 2
reload-mercy = 10
vacuum = true
max-requests = 1000
limit-as = 512
buffer-size = 30000

启动uwsgi
```
uwsgi --ini /opt/day1130/uwsgi.ini
```

二. ansible的安装与使用

安装ansible

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum install ansible -y

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

创建多台服务器的环境(克隆一台虚拟机代替)

主机关机,克隆机开机,进入克隆机

修改克隆机名为 standby
hostnamectl set-hostname standby

修改IP地址
vim /etc/sysconfig/network-scripts/ifcfg-eth0
删除UUID, 改下ip地址 : IPADDR=10.0.0.200

修改host文件
echo "改后的ip 改后的主机名">>/etc/hosts

重启网卡
systemctl restart network

秘钥链接的使用

生成秘钥
ssh-keygen
公钥推给另一台机器
ssh-copy-id -i ~/.ssh/id_rsa.pub root@10.0.0.200
给自己一个秘钥
ssh-copy-id -i ~/.ssh/id_rsa.pub root@10.0.0.200
测试
ssh 10.0.0.200 date

将这几个ip放到一个组,方便以后批量调用
```
vim /etc/ansible/hosts
[web]
10.0.0.100
10.0.0.200
```

测试

[root@wzj ~]# ansible web -m ping
显示如下则成功
10.0.0.200 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
10.0.0.100 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}

[root@wzj ~]# ansible all -m shell -a "df -h"
显示如下则成功
10.0.0.200 | CHANGED | rc=0 >>
文件系统                 容量  已用  可用 已用% 挂载点
/dev/mapper/centos-root   47G  9.3G   38G   20% /
devtmpfs                 478M     0  478M    0% /dev
tmpfs                    489M     0  489M    0% /dev/shm
tmpfs                    489M  6.7M  482M    2% /run
tmpfs                    489M     0  489M    0% /sys/fs/cgroup
/dev/sda1               1014M  125M  890M   13% /boot
tmpfs                     98M     0   98M    0% /run/user/0

10.0.0.100 | CHANGED | rc=0 >>
文件系统                 容量  已用  可用 已用% 挂载点
/dev/mapper/centos-root   47G  9.3G   38G   20% /
devtmpfs                 478M     0  478M    0% /dev
tmpfs                    489M  124K  489M    1% /dev/shm
tmpfs                    489M  6.7M  482M    2% /run
tmpfs                    489M     0  489M    0% /sys/fs/cgroup
/dev/sda1               1014M  125M  890M   13% /boot
tmpfs                     98M     0   98M    0% /run/user/0

ansible playbook自动化批量安装nginx

1. 写剧本
vim playbook_nginx.yml

- hosts: web
remote_user: root
vars:
  http_port: 80
tasks:
  - name: Add Nginx Yum Repository
    yum_repository:
      name: nginx
      description: Nginx Repository
      baseurl: http://nginx.org/packages/centos/7/$basearch/
      gpgcheck: no

  - name: Install Nginx Server
    yum: name=nginx state=present

  - name: Configure Nginx Server
    template: src=./default.conf.template dest=/etc/nginx/conf.d/default.conf
    notify: Restart Nginx Server

  - name: Start Nginx Server
    service: name=nginx state=started enabled=yes


handlers:
  - name: Restart Nginx Server
    service: name=nginx state=restarted
   
2.default.conf.template文件如下
cat default.conf.template 
server {
  listen       {{ http_port }};
  server_name  localhost;

  location / {
      root   /usr/share/nginx/html;
      index  index.html index.htm;
  }
}

3. 执行ansible-playbook
  检查语法
  ansible-playbook --syntax playbook_nginx.yml     
  模拟执行
  ansible-playbook -C playbook_nginx.yml 
  执行
  ansible-playbook playbook_nginx.yml

三. Docker的安装使用

安装docker:

curl  http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
安装依赖
yum install -y yum-utils device-mapper-persistent-data lvm2
显示Docker的所有版本:
 yum list docker-ce.x86_64 --showduplicates | sort -r
 选择一个版本安装
 yum install -y --setopt=obsoletes=0 \
 docker-ce-17.03.2.ce-1.el7.centos.x86_64 \
 docker-ce-selinux-17.03.2.ce-    1.el7.centos.noarch

启动Docker

systemctl daemon-reload
systemctl restart docker

镜像加速

mkdir -p /etc/docker
vim   /etc/docker/daemon.json

{
 "registry-mirrors": ["https://68rmyzg7.mirror.aliyuncs.com"]
}

使用docker装一些其他的环境,用于项目在其他系统上测试
```
docker pull centos:6.9
docker pull centos:7.5.1804
docker pull nginx
```
查看下了哪些镜像
```
docker images
```
启用centos6.9镜像
```
docker run -it  centos:6.9
```

查看当前所在镜像

[root@wzj ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

查询镜像

docker images  所有的镜像
docker images -q 只看镜像ID
docker inspect ID/name:tag  镜像的详细信息
docker images --no-trunc 所有的镜像的详细信息删除镜像
docker rmi -f ID/name:tag
docker rmi -f `docker images -q`  批量删除所有镜像

导入导出镜像

导出: docker save ID/name:tag >/tmp/xxx.tar
导入: docker load -i /tmp/xxx.tar