云计算实训41——部署project_exam_system项目(续)

# 创建脚本,可以在java环境中运行任何的jar包或者war包

#!/bin/bash

/usr/local/jdk/bin/java -jar /java/src/*.?ar

一、思路分析

(1)nginx

1、下载镜像,将本地的dist项目的目录挂载在容器的/usr/share/nginx/html/ 2、启动容器

3、该项目是一个前后端分离的项目,并非所有的请求都是来自同一个位置,设置请求的时候还是需 要在hosts文件中挟持域名

4、域名是固定的,但是,域名可以绑定不同的ip 5、所以我们设置前端请求发送给一个bu.yuanyu.zhangmin的域名,然后在本机中将域名劫持给我 们的docker服务器,当我们发送请求给该域名时,docker服务器将给我们作出回应

(2)mysql

1、各个版本都有官方的镜像,直接下载docker pull mysql:5.7.44 2、启动容器的时候,挂载data目录

3、制作data的时候,顺⼿删除auto.cnf

(3)tomcat

1、被war包集成,所以我们直接启动war 2、springboot可以直接集成tomcat,build一个jar包或者是war包

3、我们没有安装tomcat 4、application.properties(将tomcat连接数据库)

1、可以配置端口

2、配置数据库的访问

5、使用/usr/local/jdk/bin/java -jar Project_ExamSystem-V1.0.0.war启动,但是在启动这个任务时 一定要跳转到application.properties文件所在目录,因为在启动的同时,还需要加载applicaiton.properties

二、制作docker-compose.yml文件,实现一键部署

1、基础准备(保证基础镜像无问题)

1)下载基础镜像

[root@docker ~]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
nginx       latest   5ef79149e0ec   2 weeks ago   188MB
mysql        5.7.44   5107333e08a8   8 months ago   501MB
centos       latest   5d0da3dc9764   2 years ago   231MB

2)创建nginx:v0镜像

[root@docker project_exam_system]# tree web/

web/
├── dist
│?? ├── assets
│?? │?? ├── AdminView-yX0Ltz_1.js
│?? │?? ├── CategoryView-Ca4t3JNT.js
│?? │?? ├── CityView-0ESlUfo8.css
│?? │?? ├── CityView-BJTl06GN.js
......
│   ├── TeacherView-Cogr4CCq.js
│   │   ├── TopicView-DFXgxSyC.js
│   │   └── TopicView-Is6fJS__.css
│   ├── favicon.ico
│   └── index.html
└── Dockerfile
[root@docker web]# docker build -t nginx:v0 .

[+] Building 0.2s (7/7) FINISHED                                             
  docker:default
[root@docker ~]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
nginx       v0       13ccc573fe05   9 seconds ago   189MB

3)创建java:v0镜像

[root@docker project_exam_system]# tree java

java
├── application.properties
├── Dockerfile
├── java.sh
├── jdk
│   ├── bin
│   │   ├── jar
│   │   ├── jarsigner
│   │   ├── java
│   │   ├── javac
......
│   │       ├── rmiregistry.1
│   │       └── serialver.1
│   ├── README
│   └── release
├── jdk-17_linux-x64_bin.tar.gz
└── Project_ExamSystem-V1.0.0.war
[root@docker java]# docker build -t java:v0 .

[+] Building 7.2s (9/9) FINISHED                                             
  docker:default
[root@docker java]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
java         v0       7fae85c42cbe   36 seconds ago   591MB

4)创建mysql:v0镜像

[root@docker project_exam_system]# tree mysql/

mysql/
├── Dockerfile
└── project_exam_system.sql

0 directories, 2 files
[root@docker mysql]# docker build -t mysql:v0 .

[+] Building 0.3s (7/7) FINISHED                                             
  docker:default
[root@docker mysql]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
mysql       v0       258d8ed442ac   16 seconds ago   512MB

5)启动nginx容器

[root@docker ~]# docker run -itd -p80:80 nginx:v0

6)启动java容器

[root@docker ~]# docker run -itd --name java -p8080:8080 java:v0

7)启动mysql容器

[root@docker ~]# docker run -itd --name mysql -p3306:3306 mysql:v0

8)查看容器状态

[root@docker ~]# docker ps

CONTAINER ID   IMAGE           COMMAND                   CREATED             
STATUS             PORTS                                                 
NAMES
79cc8614e967   mysql:v0         "docker-entrypoint.s..."   9 seconds ago       
Up 6 seconds       0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp   
mysql
29d3ce68ceca   java:v0          "/usr/local/jdk/bin/..."   36 seconds ago     
Up 34 seconds      0.0.0.0:8080->8080/tcp, :::8080->8080/tcp             java
fed2633b259b   haproxy:latest   "docker-entrypoint.s..."   12 minutes ago     
Up 11 minutes      0.0.0.0:5000->5000/tcp, :::5000->5000/tcp             
wizardly_edison

# 之后这些容器可以全部直接删除

[root@docker ~]# docker rm -f 79(容器编号) 29(容器编号) fe(容器编号)

2、配置高可用的项目(使用haproxy调用web和java容器)

1)先创建三个前端项目(nginx容器)

容器在不映射端口时,在远程是无法访问nginx服务,而且现在也不希望外部直接访问nginx,希望 创建nginx服务的集群,这个集群被haproxy代理,创建3个nginx容器,创建一个haproxy服务器,而且

nginx容器还需要指定名称,web0、web1、web2。因为如果没有名称,那么容器就无法被haproxy link到。

# 端口不能映射80,并指定名称

[root@docker ~]# docker run -itd --name web0 nginx:v0 

45d83cda5bef619b937d25e581db31401841b955f9367dbffbc79a236e632612
[root@docker ~]# docker run -itd --name web1 nginx:v0 

b9c80deb9f08a4c2327c1784c8fdb3ab8044c48160ee29102f27e2b52495b9f4
[root@docker ~]# docker run -itd --name web2 nginx:v0 

5fbd082f529cdab21b3a2eb74ae6d9560c694fe2a5368e1ad63affe1ad1c93e8

# 查看容器状态

[root@docker ~]# docker ps 

CONTAINER ID   IMAGE     COMMAND                   CREATED         STATUS   
      PORTS     NAMES
5fbd082f529c   nginx:v0   "/docker-entrypoint...."   4 seconds ago   Up 3 
seconds    80/tcp   web2
b9c80deb9f08   nginx:v0   "/docker-entrypoint...."   8 seconds ago   Up 6 
seconds    80/tcp   web1
45d83cda5bef   nginx:v0   "/docker-entrypoint...."   12 seconds ago   Up 11 
seconds   80/tcp   web0

2)haproxy容器外部测试

在宿主机上安装了haproxy,编辑配置文件,代理三个nginx容器中的web服务,是直接添加容器的

ip地址

# 安装haproxy

[root@docker ~]# yum -y install haproxy
# 查看三个nginx容器的IP地址

[root@docker ~]# docker inspect 45 | grep IPA

            "SecondaryIPAddresses": null,
            "IPAddress": "172.17.0.2",
                    "IPAMConfig": null,
                    "IPAddress": "172.17.0.2",
[root@docker ~]# docker inspect b9 | grep IPA

            "SecondaryIPAddresses": null,
            "IPAddress": "172.17.0.3",
                    "IPAMConfig": null,
                    "IPAddress": "172.17.0.3",
[root@docker ~]# docker inspect 5f | grep IPA

            "SecondaryIPAddresses": null,
            "IPAddress": "172.17.0.4",
                    "IPAMConfig": null,
                    "IPAddress": "172.17.0.4",

# 修改配置文件

[root@docker ~]# vim /etc/haproxy/haproxy.cfg
# 注释静态资源

   # use_backend static         if url_static
# 修改轮询模块

backend app
   balance     roundrobin
   server app1 172.17.0.2:80 check
   server app2 172.17.0.3:80 check
   server app3 172.17.0.4:80 check

# 启动服务

[root@docker ~]# haproxy -f /etc/haproxy/haproxy.cfg 

[root@docker ~]# netstat -lntup | grep 5000

tcp        0      0 0.0.0.0:5000            0.0.0.0:*               LISTEN   
   1985/haproxy 

# 测试访问过后可以直接删除进程来停止服务

[root@docker ~]# kill -9 1985(进程号)

[root@docker ~]# netstat -lntup | grep 5000

3)创建haproxy容器

创建一个haproxy容器,将配置文件导入到容器,在容器中启动haproxy,也是可以的

# 拉取haprxy镜像

[root@docker ~]# docker pull haproxy

[root@docker ~]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
haproxy     latest   4e5bebb0fd91   7 weeks ago   103MB

# 该haproxy.cfg文件是在官方网站里下载下来的

[root@docker ~]# vim haproxy.cfg 
# 只修改web的轮询模块即可,默认是5000端口,也可修改

listen proxy-web
       bind 0.0.0.0:5000
......
       server web0 172.17.0.2:80 check weight 1 maxconn 2000
 server web1 172.17.0.3:80 check weight 1 maxconn 2000

       server web2 172.17.0.4:80 check weight 1 maxconn 2000

[root@docker ~]# docker run -itd -p5000:5000 haproxy:latest /bin/bash

fed2633b259b96d3c0ed5e9ca51c031c36b1e21361cb3cf9d57b9d49a9ea1710
[root@docker ~]# docker cp haproxy.cfg fed:/usr/local/etc/haproxy

Successfully copied 5.12kB to fed:/usr/local/etc/haproxy
[root@docker ~]# docker attach fed

haproxy@fed2633b259b:~$ ls /usr/local/etc/haproxy/haproxy.cfg 
/usr/local/etc/haproxy/haproxy.cfg

# 启动服务

haproxy@fed2633b259b:~$ haproxy -f /usr/local/etc/haproxy/haproxy.cfg 

4)使用haproxy容器调用web容器

# -itd 交互 终端 后台

# link 锚定web容器

# v 将配置文件挂载到容器中

[root@docker ~]# docker run -itd --link web0 --link web1 --link web2 -
p5000:5000 -v /root/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg 
haproxy:latest

65466d3aef2566512b63690c02e4497ddb7594b8268a26136ec040e2cb858b3b
[root@docker ~]# docker ps

CONTAINER ID   IMAGE           COMMAND                   CREATED         
STATUS         PORTS                                                 NAMES
65466d3aef25   haproxy:latest   "docker-entrypoint.s..."   6 seconds ago   Up 4 
seconds   0.0.0.0:5000->5000/tcp, :::5000->5000/tcp             
romantic_curie
79cc8614e967   mysql:v0         "docker-entrypoint.s..."   2 hours ago     Up 2 
hours     0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp   mysql
29d3ce68ceca   java:v0          "/usr/local/jdk/bin/..."   3 hours ago     Up 3 
hours     0.0.0.0:8080->8080/tcp, :::8080->8080/tcp             java
5fbd082f529c   nginx:v0         "/docker-entrypoint...."   4 hours ago     Up 4 
hours     80/tcp                                                 web2
b9c80deb9f08   nginx:v0         "/docker-entrypoint...."   4 hours ago     Up 4 
hours     80/tcp                                                 web1
45d83cda5bef   nginx:v0         "/docker-entrypoint...."   4 hours ago     Up 4 
hours     80/tcp                                                 web0

# 删除该haproxy容器(使用的是ip地址,要改为使用域名才可以进行link)

[root@docker ~]# docker rm -f 65

5)调用haproxy的监控界面(并改ip轮询为域名轮询)

# 只查看即可,创建haproxy服务器容器时将相应端口映射出去就行,记得初始的账户和密码

[root@docker ~]# vim haproxy.cfg 
######## 监控界面配置 #################

listen admin_status
        # 监控界面访问信息

       bind 0.0.0.0:8888
       mode http
        # URI相对地址

       stats uri /dbs
        # 统计报告格式

       stats realm Global\ statistics
        # 登录账户信息

       stats auth admin:123456
[root@docker ~]# vim haproxy.cfg

       server web0 web0:80 check weight 1 maxconn 2000

       server web1 web1:80 check weight 1 maxconn 2000

       server web2 web2:80 check weight 1 maxconn 2000

[root@docker ~]# docker run -itd --link web0 --link web1 --link web2 -
p5000:5000 -p8888:8888 -v 
/root/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg haproxy:latest
# 删除该haproxy容器

[root@docker ~]# docker rm -f 8af

6)使用haproxy容器调用java容器

[root@docker ~]# docker run -itd --name java0 java:v0

283c87bcaea166b017160aa84ce5424dd9baf3ec8fd168a1406f7dc11be3e694
[root@docker ~]# docker run -itd --name java1 java:v0

e851f31c87f39c2d028e42b36bd77bcf818a8eb97c9a6cc002656fd1501c0ea6
[root@docker ~]# docker run -itd --name java2 java:v0

fb94c87c4fa87d08b0d621157aa33ed74ca459beb32a3c950a7703227ab2f031
[root@docker ~]# vim haproxy.cfg 
# 复制一份proxy-web的模块,修改为java模块

listen proxy-java

# 修改端口为8080

       bind 0.0.0.0:8080
       mode http
        # 负载均衡算法

        # static-rr 权重, leastconn 最少连接, source 请求IP, 轮询 roundrobin

       balance roundrobin
        # 日志格式

       option tcplog
        # 在 mysql 创建一个没有权限的haproxy用户,密码为空。 haproxy用户

        # create user 'haproxy'@'%' identified by ''; FLUSH PRIVILEGES;

        #option mysql-check user haproxy

         # 这里是容器中的IP地址,由于配置的是轮询roundrobin,weight 权重其实没有生效

# 修改域名为java域名,端口为java端口

       server java0 java0:8080 check weight 1 maxconn 2000

       server java1 java1:8080 check weight 1 maxconn 2000

       server java2 java2:8080 check weight 1 maxconn 2000

        #server MYSQL_3 192.168.130.102:3306 check weight 1 maxconn 2000

        # 使用keepalive检测死链

        # option tcpka

[root@docker ~]# docker run -itd --link web0 --link web1 --link web2 --link 
java0 --link java1 --link java2 -p8080:8080 -p5000:5000 -p8888:8888 -v 
/root/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg haproxy:latest

e5ea894c0f30988604cfd6fe5a48b9a69f14c2c3f2e373fe775c0554f37f19db
# 下载http-tools,使用ab测试承载量

[root@docker ~]# yum -y install http-tools

[root@docker ~]# ab -n 100 -c 10 http://10.0.0.7:5000/

3、编辑docker-compose.yml文件,一键部署完整项目

新机子:

1)docker-compose环境准备

# 配置docker环境

source docker.sh
scp 10.0.0.7:/etc/docker/daemon.json /etc/docker/daemon.json

vim /etc/docker/daemon.json 
{       
        "registry-mirrors" : [
                "https://do.nark.eu.org",
                "https://dc.j8.work",
                "https://docker.m.daocloud.io",
                "https://dockerproxy.com",
                "https://docker.mirrors.ustc.edu.cn",
                "https://docker.nju.edu.cn"

       ]
}  
systemctl start docker

# 安装pip(python包管理器)

yum -y install python2-pip

# 升级pip

pip install --upgrade pip==20.3  -i https://mirrors.aliyun.com/pypi/simple

# 安装docker-compose

[root@compose ~]# pip install docker-compose --ignore-installed requests -i 
https://mirrors.aliyun.com/pypi/simple

2)使用compose构建自动化部署文件

# 创建项目目录

[root@compose ~]# mkdir -p pes/{java,mysql,web}

[root@compose ~]# tree pes/

pes/
├── java
├── mysql
└── web

3 directories, 0 files
[root@compose ~]# cd pes
# 在项目目录中创建docker-compoce.yml文件

[root@compose pes]# vim docker-compose.yml

version: "3"

services:
web:
               container_name: web0
               image: nginx:latest
               ports:
                - "80:80"

               volumes:
                - ./web/src/dist/:/usr/share/nginx/html/
               expose:
                - 80

                restart: "always"

#       mysql:
#               container_name: mysql0
#               image: mysql:5.7.44
#       java:
#               container_name: java0
#               image: java:v0

[root@compose pes]# mkdir -p web/src/

[root@compose pes]# scp -r 10.0.0.7:/root/project_exam_system/web/dist 
web/src/

[root@compose pes]# ls web/src/

dist

# 拉取nginx镜像

[root@compose pes]# docker pull nginx

Using default tag: latest

# 执行docker compose命令创建指定容器

[root@compose pes]# docker compose up -d

WARN[0000] /root/pes/docker-compose.yml: `version` is obsolete 
[+] Running 1/1
 ✔ Container web0 Started                                                   
             0.9s 
 # 查看容器是否正常创建启动

[root@compose pes]# docker ps

CONTAINER ID   IMAGE         COMMAND                   CREATED             
STATUS             PORTS                               NAMES
5a007ca2fdbe   nginx:latest   "/docker-entrypoint...."   About a minute ago   
Up About a minute   0.0.0.0:80->80/tcp, :::80->80/tcp   web0

3)使用docker compose一次性创建多台完全一样的容器

# 查看docker-compose的帮助文档

[root@compose ~]# docker-compose --help

scale             Set number of containers for a service

# 查看docker-compose scale的帮助文档

[root@compose ~]# docker-compose scale --help

Usage: scale [options] [SERVICE=NUM...]

# 一次性创建多台相同容器时,不能为容器启相同的名称,映射相同的端口,所以需要在yml文件中将这
两行注释掉

[root@compose pes]# vim docker-compose.yml 

version: "3"

services:
       web:
                #container_name: web0

               image: nginx:latest
                #ports:

                #- "80:80"

               volumes:
                - ./web/src/dist/:/usr/share/nginx/html/
               expose:
                - 80

                restart: "always"

# 使用scale选项创建3台相同的web容器

[root@compose pes]# docker compose up --scale web=3 -d

WARN[0000] /root/pes/docker-compose.yml: `version` is obsolete 
[+] Running 3/3
 ✔ Container pes-web-3 Started                                             
              0.8s 
 ✔ Container pes-web-1 Started                                             
              0.5s 
 ✔ Container pes-web-2 Started                                             
              1.1s

# 查看容器列表

[root@compose ~]# docker ps

CONTAINER ID   IMAGE         COMMAND                   CREATED         
STATUS         PORTS     NAMES
dd63d63e1ced   nginx:latest   "/docker-entrypoint...."   29 minutes ago   Up 29 
minutes   80/tcp   pes_web_2
12edb14dfae7   nginx:latest   "/docker-entrypoint...."   29 minutes ago   Up 29 
minutes   80/tcp   pes_web_1
89fa62180f85   nginx:latest   "/docker-entrypoint...."   29 minutes ago   Up 29 
minutes   80/tcp   pes_web_3

# docker-compose暂停集群

[root@compose ~]# cd pes/

[root@compose pes]# docker-compose stop

/usr/lib/python2.7/site-packages/paramiko/transport.py:33: 
CryptographyDeprecationWarning: Python 2 is no longer supported by the Python 
core team. Support for it is now deprecated in cryptography, and will be 
removed in the next release.
 from cryptography.hazmat.backends import default_backend
Stopping pes-web-1 ... done

Stopping pes-web-3 ... done

Stopping pes-web-2 ... done

[root@compose pes]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS   PORTS     NAMES

# docker-compose移除集群

[root@compose pes]# docker-compose down

/usr/lib/python2.7/site-packages/paramiko/transport.py:33: 
CryptographyDeprecationWarning: Python 2 is no longer supported by the Python 
core team. Support for it is now deprecated in cryptography, and will be 
removed in the next release.
 from cryptography.hazmat.backends import default_backend
Removing pes-web-1 ... done

Removing pes-web-3 ... done

Removing pes-web-2 ... done

Removing network pes_default
[root@compose pes]# docker ps -a

CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS   PORTS     NAMES
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