Docker进阶笔记

Dokcer Compose

该笔记仅用来记录学习狂神docker进阶视频的过程

安装Compose

Docker Compose是Docker官方的又一个开源项目，而不是Docker里面的内容，所以需要另外安装

# 下载
curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.5/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
# 授权
[root@VM-20-17-centos bin]# sudo chmod +x /usr/local/bin/docker-compose
# 查看版本信息
[root@VM-20-17-centos bin]# docker-compose version
docker-compose version 1.25.5, build 8a1c60f6
docker-py version: 4.1.0
CPython version: 3.7.5
OpenSSL version: OpenSSL 1.1.0l  10 Sep 2019

快速开始

[root@VM-20-17-centos home]# mkdir composetest
[root@VM-20-17-centos home]#  cd composetest
[root@VM-20-17-centos composetest]# vim app.py

#以下是app.py的内容
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)

[root@VM-20-17-centos composetest]# vim requirements.txt

# Dockerfile 内容
# syntax=docker/dockerfile:1
FROM python:3.7-alpine
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"]

[root@VM-20-17-centos composetest]# vim docker-compose.yml
# 以下是 docker-compose.yml内容
version: "3.9"
services:
  web:
    build: .
    ports:
      - "8000:5000"
  redis:
    image: "redis:alpine"

# 启动
[root@VM-20-17-centos composetest]# docker-compose up
ERROR: Version in "./docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to use version 1.
For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/

版本报错，照他提示修改docker-compose.yml里面的版本，我这里就改为3.3

# 启动成功
[root@VM-20-17-centos ~]# docker ps
CONTAINER ID   IMAGE             COMMAND                  CREATED              STATUS              PORTS                                       NAMES
bdeaaf95a605   redis:alpine      "docker-entrypoint.s…"   About a minute ago   Up About a minute   6379/tcp                                    composetest_redis_1
3ba57318e521   composetest_web   "flask run"              About a minute ago   Up About a minute   0.0.0.0:8000->5000/tcp, :::8000->5000/tcp   composetest_web_1

成功效果图

[root@VM-20-17-centos ~]# curl localhost:8000
Hello World! I have been seen 1 times.
[root@VM-20-17-centos ~]# docker images
REPOSITORY        TAG          IMAGE ID       CREATED         SIZE
composetest_web   latest       fe3ae489c0b5   6 minutes ago   185MB
redis             alpine       3900abf41552   4 months ago    32.4MB
python            3.7-alpine   a1034fd13493   4 months ago    41.8MB

# 查看网络，compose自动维护了一个网络,该网络内的容器之间就可以通过服务名互相访问
[root@VM-20-17-centos ~]# docker network ls
NETWORK ID     NAME                  DRIVER    SCOPE
34508300f083   bridge                bridge    local
6d7ed0ee2506   composetest_default   bridge    local
2242e5304377   host                  host      local
7125179683a5   none                  null      local

[root@VM-20-17-centos ~]# docker  network inspect 6d7ed0ee2506

停止 docker-compose down (需要在composetest目录下)

docker-compose.yaml

https://docs.docker.com/compose/compose-file/#compose-file-structure-and-examples

version: ""  # 版本
services:    # 服务
  （服务1）web:
    # 服务配置
    images
    build: .
    ports:
      - "8000:5000"
  	network
  	.....
  （服务2）redis:
    ....
  （服务3）
  。。。。
# 其他配置 网络/卷  、全局规则
volumes:
networks:
configs:

启动顺序要注意，如下中的web是依赖redis执行的，通过depends_on配置，保证redis先启动，再启动web

Compose搭建wordpress博客

官方文档：https://docs.docker.com/samples/wordpress/

版本我这里依旧改为 3.3，官方给的版本太高

[root@VM-20-17-centos ~]# cd /home
[root@VM-20-17-centos home]# ls
composetest  docker-test-volume  lighthouse  mybuild  mysql  springbootdocker  test
[root@VM-20-17-centos home]# mkdir my_wordpress
[root@VM-20-17-centos home]# ls
composetest  docker-test-volume  lighthouse  mybuild  mysql  my_wordpress  springbootdocker  test
[root@VM-20-17-centos home]# cd my_wordpress/
[root@VM-20-17-centos my_wordpress]# vim docker-compose.yml
[root@VM-20-17-centos my_wordpress]# docker-compose up

# docker-compose.yml内容如下
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
    volumes:
      - wordpress_data:/var/www/html
    ports:
      - "8000:80"
    restart: always
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_NAME: wordpress
volumes:
  db_data: {}
  wordpress_data: {}

wordpress博客密码： x$^VPwutKX9rfahXQX

管理页面地址 http://119.91.149.217:8000/wp-admin/

前台地址 http://119.91.149.217:8000/

# 后台启动 
docker-compose up -d

实战构建springboot

1、编写微服务项目

2、dockerfile构建镜像

FROM java:8

COPY *.jar /app.jar

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

EXPOSE 8080

ENTRYPOINT ["java","-jar","/app.jar"]

3、docker-compose.yaml 编排项目

version: '3.3'
services:
  kayapp:
    build: .
    image: kayapp
    depends_on:
      - redis
    ports:
      - "8080:8080"
  redis:
    image: "library/redis:alpine"

4、丢到服务器 ，执行命令 docker-compose up

Docker Swarm

准备四台机器

工作模式

搭建集群

[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm --help
Usage:  docker swarm COMMAND
Manage Swarm
Commands:
  ca          Display and rotate the root CA
  init        Initialize a swarm
  join        Join a swarm as a node and/or manager
  join-token  Manage join tokens
  leave       Leave the swarm
  unlock      Unlock swarm
  unlock-key  Manage the unlock key
  update      Update the swarm

Run 'docker swarm COMMAND --help' for more information on a command.


[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm init --help
Usage:  docker swarm init [OPTIONS]
Initialize a swarm
Options:
      --advertise-addr string                  Advertised address (format: <ip|interface>[:port])
      --autolock                               Enable manager autolocking (requiring an unlock key to start a stopped manager)
      --availability string                    Availability of the node ("active"|"pause"|"drain") (default "active")
      --cert-expiry duration                   Validity period for node certificates (ns|us|ms|s|m|h) (default 2160h0m0s)
      --data-path-addr string                  Address or interface to use for data path traffic (format: <ip|interface>)
      --data-path-port uint32                  Port number to use for data path traffic (1024 - 49151). If no value is set or is set to 0, the
                                               default port (4789) is used.
      --default-addr-pool ipNetSlice           default address pool in CIDR format (default [])
      --default-addr-pool-mask-length uint32   default address pool subnet mask length (default 24)
      --dispatcher-heartbeat duration          Dispatcher heartbeat period (ns|us|ms|s|m|h) (default 5s)
      --external-ca external-ca                Specifications of one or more certificate signing endpoints
      --force-new-cluster                      Force create a new cluster from current state
      --listen-addr node-addr                  Listen address (format: <ip|interface>[:port]) (default 0.0.0.0:2377)
      --max-snapshots uint                     Number of additional Raft snapshots to retain
      --snapshot-interval uint                 Number of log entries between Raft snapshots (default 10000)
      --task-history-limit int                 Task history retention limit (default 5)

# 初始化节点 （这个操作是在docker-1这个服务器上操作的） 172.29.97.81用自己的 eth0网卡的地址
[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm init --advertise-addr 172.29.97.81
Swarm initialized: current node (qhf6uz80r4po13l3svkj4q69v) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-cbgd7xjwi4nmmugugbmn2bfla 172.29.97.81:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

# 加入工作节点（从）
docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-cbgd7xjwi4nmmugugbmn2bfla 172.29.97.81:2377

# 加入管理（主）
docker swarm join-token manager

# docker-2执行
[root@iZwz98fvksp4n70u68swzrZ ~]# docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-cbgd7xjwi4nmmugugbmn2bfla 172.29.97.81:2377
This node joined a swarm as a worker.

# docker-1执行
[root@iZwz98fvksp4n70u68swzqZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
qhf6uz80r4po13l3svkj4q69v *   iZwz98fvksp4n70u68swzqZ   Ready     Active         Leader           20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14

# 获取令牌
docker swarm join-token manager
docker swarm join-token worker

# docker-1执行
[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm join-token worker
To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-cbgd7xjwi4nmmugugbmn2bfla 172.29.97.81:2377

# docker-3 执行
[root@iZwz98fvksp4n70u68swzpZ ~]# docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-cbgd7xjwi4nmmugugbmn2bfla 172.29.97.81:2377
This node joined a swarm as a worker.

# docker-1
[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm join-token manager
To add a manager to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-dltdf7dwha0niw0nu7r2mb8y3 172.29.97.81:2377
#docker-4
[root@iZwz98fvksp4n70u68swzoZ ~]# docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-dltdf7dwha0niw0nu7r2mb8y3 172.29.97.81:2377
This node joined a swarm as a manager.

双主双从的集群 （搭建集群其实本来应该是至少三主 的）

[root@iZwz98fvksp4n70u68swzqZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
jr315df2w8mhxkj8mmmvcog43     iZwz98fvksp4n70u68swzoZ   Ready     Active         Reachable        20.10.14
sqwv8fihfs72kj0t1bi495cxn     iZwz98fvksp4n70u68swzpZ   Ready     Active                          20.10.14
qhf6uz80r4po13l3svkj4q69v *   iZwz98fvksp4n70u68swzqZ   Ready     Active         Leader           20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14

Raft协议

Raft动画演示 ：http://thesecretlivesofdata.com/raft/

双主双从：假设一个节点挂了，其他节点是否可用？

Raft协议：保证大多数节点存活才可以用。 集群至少要大于3台

测试

1、将docker-1这台机器停止systemctl stop docker。 双主的情况下，另外一个主节点也不能使用了（因为他无法判断是自己离线了还是另一个主节点离线了）

在docker-4执行 docker node ls，报如下错误

2、节点离开集群

# 重启docker-1
[root@iZwz98fvksp4n70u68swzqZ ~]# systemctl start docker
# 发现老大已经变成docker-4
[root@iZwz98fvksp4n70u68swzqZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
jr315df2w8mhxkj8mmmvcog43     iZwz98fvksp4n70u68swzoZ   Ready     Active         Leader           20.10.14
sqwv8fihfs72kj0t1bi495cxn     iZwz98fvksp4n70u68swzpZ   Ready     Active                          20.10.14
qhf6uz80r4po13l3svkj4q69v *   iZwz98fvksp4n70u68swzqZ   Ready     Active         Reachable        20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14

# docker-3离开集群 （打工人离职）
[root@iZwz98fvksp4n70u68swzpZ ~]# docker swarm leave
Node left the swarm.

# docker-1查看，发现docker-3的STATUS（状态）已经变为down
[root@iZwz98fvksp4n70u68swzqZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
jr315df2w8mhxkj8mmmvcog43     iZwz98fvksp4n70u68swzoZ   Ready     Active         Leader           20.10.14
sqwv8fihfs72kj0t1bi495cxn     iZwz98fvksp4n70u68swzpZ   Down      Active                          20.10.14
qhf6uz80r4po13l3svkj4q69v *   iZwz98fvksp4n70u68swzqZ   Ready     Active         Reachable        20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14
# docker-1 生成令牌
[root@iZwz98fvksp4n70u68swzqZ ~]# docker swarm join-token manager
To add a manager to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-dltdf7dwha0niw0nu7r2mb8y3 172.29.97.81:2377
    
# docker-3 成为主节点，此时就成了三主    
[root@iZwz98fvksp4n70u68swzpZ ~]# docker swarm join --token SWMTKN-1-2phlgtraz7k3dfz7ulwyo59puwxwzxii2iiglx4m9gfa4iyasb-dltdf7dwha0niw0nu7r2mb8y3 172.29.97.81:2377
This node joined a swarm as a manager.

3、worker节点就算工作的，所以docker-2没法执行 docker node ls 这样的操作

# 停掉 docker-1
[root@iZwz98fvksp4n70u68swzqZ ~]# systemctl stop docker

# docker-4 查看
[root@iZwz98fvksp4n70u68swzoZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
jr315df2w8mhxkj8mmmvcog43 *   iZwz98fvksp4n70u68swzoZ   Ready     Active         Leader           20.10.14
dph67shd544rhfmjgt7ay4w9m     iZwz98fvksp4n70u68swzpZ   Ready     Active         Reachable        20.10.14
sqwv8fihfs72kj0t1bi495cxn     iZwz98fvksp4n70u68swzpZ   Down      Active                          20.10.14
qhf6uz80r4po13l3svkj4q69v     iZwz98fvksp4n70u68swzqZ   Down      Active         Unreachable      20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14
# docker-3 查看
[root@iZwz98fvksp4n70u68swzpZ ~]# docker node ls
ID                            HOSTNAME                  STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
jr315df2w8mhxkj8mmmvcog43     iZwz98fvksp4n70u68swzoZ   Ready     Active         Leader           20.10.14
dph67shd544rhfmjgt7ay4w9m *   iZwz98fvksp4n70u68swzpZ   Ready     Active         Reachable        20.10.14
sqwv8fihfs72kj0t1bi495cxn     iZwz98fvksp4n70u68swzpZ   Down      Active                          20.10.14
qhf6uz80r4po13l3svkj4q69v     iZwz98fvksp4n70u68swzqZ   Down      Active         Unreachable      20.10.14
l5wtyhnza7gveyakkjdnhhp5u     iZwz98fvksp4n70u68swzrZ   Ready     Active                          20.10.14

可以正常使用，即实现了高可用

# 把docker-3也停掉
[root@iZwz98fvksp4n70u68swzpZ ~]# systemctl stop docker

# docker-4 查看
[root@iZwz98fvksp4n70u68swzoZ ~]# docker node ls
Error response from daemon: rpc error: code = Unknown desc = The swarm does not have a leader. It's possible that too few managers are online. Make sure more than half of the managers are online.

弹性、扩缩容、集群

docker集群 -> 容器是服务-> 服务可以在容器中启动多个

[root@iZwz98fvksp4n70u68swzqZ ~]# docker service --help

Usage:  docker service COMMAND

Manage services

Commands:
  create      Create a new service
  inspect     Display detailed information on one or more services
  logs        Fetch the logs of a service or task
  ls          List services
  ps          List the tasks of one or more services
  rm          Remove one or more services
  rollback    Revert changes to a service's configuration
  scale       Scale one or multiple replicated services
  update      Update a service

Run 'docker service COMMAND --help' for more information on a command.

# docker-1
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service create -p 8888:80 --name my-nginx nginx

docker run 启动容器，不具有扩缩容的功能

docker service 服务 具有扩缩容、滚动更新等功能

[root@iZwz98fvksp4n70u68swzqZ ~]# docker service ps my-nginx
ID             NAME         IMAGE          NODE                      DESIRED STATE   CURRENT STATE                ERROR     PORTS
mpcff3vfx6xt   my-nginx.1   nginx:latest   iZwz98fvksp4n70u68swzpZ   Running         Running about a minute ago  

# 查看服务
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service ls
ID             NAME       MODE         REPLICAS   IMAGE          PORTS
khx16af3ydne   my-nginx   replicated   1/1        nginx:latest   *:8888->80/tcp


# docker-1 、docker-2 、docker-3、docker-4一个个尝试，发现服务跑在docker-3这台机器上面
[root@iZwz98fvksp4n70u68swzpZ ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS     NAMES
96c83c3b3f9b   nginx:latest   "/docker-entrypoint.…"   4 minutes ago   Up 4 minutes   80/tcp    my-nginx.1.mpcff3vfx6xt49ecsqwpgopvt

# 动态扩缩容
# docker-1上，给my-nginx创建三个副本
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service update --replicas 3 my-nginx
[root@iZwz98fvksp4n70u68swzqZ ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

#docker-2查看
[root@iZwz98fvksp4n70u68swzrZ ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED              STATUS              PORTS     NAMES
06883f50c1c5   nginx:latest   "/docker-entrypoint.…"   About a minute ago   Up About a minute   80/tcp    my-nginx.3.xekwkxqplqhx8d0r95pyzehcl

#docker-3 查看
[root@iZwz98fvksp4n70u68swzpZ ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS     NAMES
96c83c3b3f9b   nginx:latest   "/docker-entrypoint.…"   9 minutes ago   Up 9 minutes   80/tcp    my-nginx.1.mpcff3vfx6xt49ecsqwpgopvt

#docker-4 查看
[root@iZwz98fvksp4n70u68swzoZ ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS     NAMES
66b48717cf69   nginx:latest   "/docker-entrypoint.…"   54 seconds ago   Up 53 seconds   80/tcp    my-nginx.2.r56lr76bfa2d8da5rq0f0oiot
[root@iZwz98fvksp4n70u68swzoZ ~]# 

# 开十个副本也没问题
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service update --replicas 10 my-nginx
overall progress: 10 out of 10 tasks 
1/10: running   [==================================================>] 
2/10: running   [==================================================>] 
3/10: running   [==================================================>] 
4/10: running   [==================================================>] 
5/10: running   [==================================================>] 
6/10: running   [==================================================>] 
7/10: running   [==================================================>] 
8/10: running   [==================================================>] 
9/10: running   [==================================================>] 
10/10: running   [==================================================>] 
verify: Service converged 

集群中任意节点都可以访问服务。服务可以有多个副本动态扩缩容实现高可用

# 嫌副本太多了，动态回滚，让他只剩下一个副本
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service update --replicas 1 my-nginx
my-nginx
overall progress: 1 out of 1 tasks 
1/1: running   [==================================================>] 
verify: Service converged 

# scale命令 和上面的update命令是一样的，也是动态扩缩容
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service scale  my-nginx=5
my-nginx scaled to 5
overall progress: 5 out of 5 tasks 
1/5: running   [==================================================>] 
2/5: running   [==================================================>] 
3/5: running   [==================================================>] 
4/5: running   [==================================================>] 
5/5: running   [===============

# 移除服务
[root@iZwz98fvksp4n70u68swzqZ ~]# docker service rm my-nginx
my-nginx

概念

swarm

集群的管理和编排，docker可以初始化一个swarm集群，其他节点可以加入

Node

就是一个docker节点，多个节点就组成了一个网络集群。（节点分为：管理节点、工作节点）

Service

任务，可以在管理节点或者工作节点来运行。用户访问的就是Service

Task

容器内的命令，细节任务。前面说的副本，每个副本其实就是一个Task任务

下图是创建副本的时候的截图，可以看出就是在创建Task

Docker Stack

docker-compose 单机部署项目

Docker Stack 集群部署

# 单机
docker-compose up -d wordpress.yml
# 集群
docker stack deploy wordpress.yml

# Docker Stack 案例
# docker-compose.yml内容如下
version: "3.3"
services:
  service1:
    image: "registry.cn-guangzhou.aliyuncs.com/lengcz_pub/test1:1.0"
    deploy:
      replicas: 2
    ports:
      - "8080:8080"

  service2:
    image: "registry.cn-guangzhou.aliyuncs.com/lengcz_pub/test2:1.0"
    deploy:
      replicas: 4
    ports:
      - "8081:8081"

Docker Secret

Docker Config

CI/CD之Jenkins

什么是DevOps

如何落地实现DevOps理念

名企笔试真题练习 https://www.nowcoder.com/contestRoom

校招笔试真题汇总 https://www.nowcoder.com/contestRoom?mutiTaglds=1657

校招备战学习计划 https://www.nowcoder.com/studypath/1

在线编程 https://www.nowcoder.com/activity/oj

剑指offer在线编程 https://www.nowcoder.com/ta/coding-interviews

牛客讨论区 https://www.nowcoder.com/discuss

各岗位汇总目录 https://www.nowcoder.com/discuss/167046

各公司面经汇总目录 https://www.nowcoder.com/discuss/161635

deploy:
replicas: 4
ports:
- “8081:8081”

# Docker Secret

[外链图片转存中...(img-bdAkaW2f-1651135164774)]

# Docker Config

[外链图片转存中...(img-Lh7I0ZVW-1651135164775)]



# CI/CD之Jenkins

## 什么是DevOps

[外链图片转存中...(img-5QUTk0zh-1651135164777)]

[外链图片转存中...(img-3zqqRbHo-1651135164778)]

## 如何落地实现DevOps理念

[外链图片转存中...(img-oMVnjFJ7-1651135164780)]











名企笔试真题练习  https://www.nowcoder.com/contestRoom

校招笔试真题汇总 https://www.nowcoder.com/contestRoom?mutiTaglds=1657

校招备战学习计划 https://www.nowcoder.com/studypath/1

在线编程 https://www.nowcoder.com/activity/oj

剑指offer在线编程 https://www.nowcoder.com/ta/coding-interviews

牛客讨论区 https://www.nowcoder.com/discuss

各岗位汇总目录 https://www.nowcoder.com/discuss/167046

各公司面经汇总目录 https://www.nowcoder.com/discuss/161635