【狂神说】Docker（三） - 高级进阶_docker 高阶 狂神

本文章仅个人学习笔记，内容来源b站up主：遇见狂神说

Docker Compose

简介

第3P Compose 安装https://www.bilibili.com/video/BV1kv411q7Qc?p=3

安装

看官方文档

1、下载

curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
1

2、授权

sudo chmod +x docker-compose
1

3、查看版本

docker-compose version
1

第4P Compose 初体验https://www.bilibili.com/video/BV1kv411q7Qc?p=3

体验

官方文档：https://docs.docker.com/compose/gettingstarted/

1、创建文件夹 composetest

$ mkdir composetest
$ cd composetest
1
2

2、创建 app.py

$ vim app.py

import time

import redis
from flask import Flask

app = Flask(__name__)
cache = redis.Redis(host='redis', port=6379)

def get_hit_count():
    retries = 5
    while True:
        try:
            return cache.incr('hits')
        except redis.exceptions.ConnectionError as exc:
            if retries == 0:
                raise exc
            retries -= 1
            time.sleep(0.5)

@app.route('/')
def hello():
    count = get_hit_count()
    return 'Hello World! I have been seen {} times.\n'.format(count)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

3、创建 requirements.txt

$ vim requirements.txt

flask
redis
1
2
3
4

4、创建 Dockerfile

$ vim Dockerfile

FROM python:3.7-alpine
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories 
WORKDIR /code
ENV FLASK_APP=app.py
ENV FLASK_RUN_HOST=0.0.0.0
RUN apk add --no-cache gcc musl-dev linux-headers
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
EXPOSE 5000
COPY . .
CMD ["flask", "run"]
1
2
3
4
5
6
7
8
9
10
11
12
13

5、创建 docker-compose.yml

$ vim docker-compose.yml

version: "3.8"
services:
  web:
    build: .
    ports:
      - "5000:5000"
  redis:
    image: "redis:alpine"
1
2
3
4
5
6
7
8
9
10

6、启动

$ docker-compose build
$ docker-compose up
1
2

7、停止

8、小结

第5P Compose 初体验https://www.bilibili.com/video/BV1kv411q7Qc?p=3

yaml 规则

docker-compose.yaml 核心！
官方文档：https://docs.docker.com/compose/compose-file/

第6P 使用Compose一键部署WP博客https://www.bilibili.com/video/BV1kv411q7Qc?p=3

开源项目 - 博客

官方文档：https://docs.docker.com/compose/wordpress/
1、创建文件

$ mkdir my_wordpress
$ cd my_wordpress
$ vim docker-compose.yml

version: '3.3'

services:
   db:
     image: mysql:5.7
     volumes:
       - db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: somewordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress

   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: wordpress
       WORDPRESS_DB_NAME: wordpress
volumes:
    db_data: {}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

2、启动

# 前台启动
$ docker-compose up
# 后台启动
$ docker-compose up -d
1
2
3
4

第7P 实战：自己编写微服务上线https://www.bilibili.com/video/BV1kv411q7Qc?p=3

自己编写微服务上线

1、编写微服务项目（带redis）
HelloController.java

@RestController
public class HelloController {

    @Autowired
    StringRedisTemplate redisTemplate;

    @GetMapping("/hello")
    public String hello(){
        Long views = redisTemplate.opsForValue().increment("views");
        return "hello:"+views;
    }
}
1
2
3
4
5
6
7
8
9
10
11
12

2、dockerfile构建镜像

FROM java:8

COPY *.jar /app.jar

CMD ["--server.port=8080"]

EXPOSE 8080

ENTRYPOINT ["java","-jar","/app.jar"]
1
2
3
4
5
6
7
8
9

3、docker-compose.yaml 编排项目

version: '3.3'
services:
  wengapp:
    build: .
    image: wengiapp
    depends_on:
      - redis
    ports:
    - "8080:8080"
  redis:
    image: "library/redis:alpine"
1
2
3
4
5
6
7
8
9
10
11

4、丢到服务器 docker-compose up

总结：

第8P Compose 初体验https://www.bilibili.com/video/BV1kv411q7Qc?p=3
第9P Compose 初体验https://www.bilibili.com/video/BV1kv411q7Qc?p=3
第10P Compose 初体验https://www.bilibili.com/video/BV1kv411q7Qc?p=3