Docker Compose

冷不防 2021-09-29 02:36 343阅读 0赞

## 一. 运行多个服务app. ##

### 1. docker-compose.yml文件内容如下： ###

> \[root@c720120 docker\]\# cat docker-compose.yml
> 
> version: "2"  
> services:  
>    web:  
>      image: fundamentalsofdocker/ch08-web:1.0  
>      ports:  
>        - 3000:3000  
>    db:  
>      image: fundamentalsofdocker/ch08-db:1.0  
>      volumes:  
>        - pets-data:/var/lib/postgresql/data
> 
> volumes:  
>    pets-data:

### 2. 进行构建。 ###

> \[root@c720120 docker\]\# docker-compose up  
> Creating docker\_web\_1  
> Creating docker\_db\_1  
> Attaching to docker\_web\_1, docker\_db\_1  
> db\_1   | 2018-06-06 03:31:29.456 UTC \[1\] LOG:  listening on IPv4 address "0.0.0.0", port 5432  
> db\_1   | 2018-06-06 03:31:29.456 UTC \[1\] LOG:  listening on IPv6 address "::", port 5432  
> db\_1   | 2018-06-06 03:31:29.473 UTC \[1\] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"  
> db\_1   | 2018-06-06 03:31:29.658 UTC \[19\] LOG:  database system was interrupted; last known up at 2018-05-28 14:36:46 UTC  
> web\_1  | Listening at 0.0.0.0:3000  
> db\_1   | 2018-06-06 03:31:30.312 UTC \[19\] LOG:  database system was not properly shut down; automatic recovery in progress  
> db\_1   | 2018-06-06 03:31:30.317 UTC \[19\] LOG:  redo starts at 0/15E7788  
> db\_1   | 2018-06-06 03:31:30.317 UTC \[19\] LOG:  invalid record length at 0/15E7868: wanted 24, got 0  
> db\_1   | 2018-06-06 03:31:30.317 UTC \[19\] LOG:  redo done at 0/15E7830  
> db\_1   | 2018-06-06 03:31:30.370 UTC \[1\] LOG:  database system is ready to accept connections

### 3. 然后访问刚才创建的服务，进行校验 ###

[![image][]][image 1]

### 4. 可以依后端模式方式运行 ###

> \[root@c720120 ~\]\# docker-compose up –d

### 5. 停止和清除应用。 ###

> \[root@c720120 docker\]\# docker-compose down  
> Removing docker\_db\_1 ... done  
> Removing docker\_web\_1 ... done  
> Removing network docker\_default  
>

### 6. 移除在本实验中创建的卷 ###

> docker volume rm ch08\_pets-data

## 二. 扩容服务 ##

### 1. 扩容web服务为3个实例 ###

> \[root@c720120 docker\]\# docker-compose up --scale web=3  
> Creating network "docker\_default" with the default driver  
> WARNING: The "web" service specifies a port on the host. If multiple containers for this service are created on a single host, the port will clash.  
> Creating docker\_web\_1 ... error  
> Creating docker\_web\_2 ... error  
> Creating docker\_web\_3 ... done  
> Creating docker\_db\_1  ...
> 
> ERROR: for docker\_web\_2  Cannot start service web: b'driver failed programming external connectivity on endpoint docker\_web\_2 (08577c93fc049638fe034a078c0beaea7e43aca280fb1101046f914969d6e22d): Bind for 0.0.0.0:3000 failed: port is already allocated'
> 
> ERROR: for docker\_web\_1  Cannot start service web: b'driver failed programming external connectivity on endpoint docker\_web\_1 (1b839b479360b96fcd83aa69948ede428792089544c369b0d7a41f93f876c050): Bind for 0.0  
> Creating docker\_db\_1  ... done
> 
> ERROR: for web  Cannot start service web: b'driver failed programming external connectivity on endpoint docker\_web\_2 (08577c93fc049638fe034a078c0beaea7e43aca280fb1101046f914969d6e22d): Bind for 0.0.0.0:3000 failed: port is already allocated'  
> ERROR: Encountered errors while bringing up the project.

**注意：在扩容服务时，报错，这是由于web服务使用3000端口，而第二个容器使用相同端口的话就会报错。**

### 2. 关闭1步创建的服务 ###

> \[root@c720120 docker\]\# docker-compose down  
> Stopping docker\_db\_1  ... done  
> Stopping docker\_web\_3 ... done  
> Removing docker\_db\_1  ... done  
> Removing docker\_web\_1 ... done  
> Removing docker\_web\_2 ... done  
> Removing docker\_web\_3 ... done  
> Removing network docker\_default  
>

### 3. 修改后docker-compoe.yml文件内容如下： ###

> \[root@c720120 docker\]\# cat docker-compose.yml  
> version: "2"  
> services:  
>    web:  
>      image: fundamentalsofdocker/ch08-web:1.0  
>      ports:  
>        - 3000  
>    db:  
>      image: fundamentalsofdocker/ch08-db:1.0  
>      volumes:  
>        - pets-data:/var/lib/postgresql/data
> 
> volumes:  
>    pets-data:

### 4. 再一次的启动服务并扩容 ###

> \[root@c720120 docker\]\# docker-compose up -d  
> Creating network "docker\_default" with the default driver  
> Creating docker\_web\_1 ... done  
> Creating docker\_db\_1  ... done  
> \[root@c720120 docker\]\# docker-compose scale web=3  
> WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.  
> Starting docker\_web\_1 ... done  
> Creating docker\_web\_2 ... done  
> Creating docker\_web\_3 ... done

### 5. 显示创建的的应用 ###

> \[root@c720120 docker\]\# docker-compose ps  
>      Name                  Command              State            Ports          
> \------------------------------------------------------------------------------  
> docker\_db\_1    docker-entrypoint.sh postgres   Up      5432/tcp                
> docker\_web\_1   /bin/sh -c node src/server.js   Up      0.0.0.0:32769->3000/tcp  
> docker\_web\_2   /bin/sh -c node src/server.js   Up      0.0.0.0:32771->3000/tcp  
> docker\_web\_3   /bin/sh -c node src/server.js   Up      0.0.0.0:32770->3000/tcp

## 三. 使用docker-compose构建并推送应用到registry ##

### 1. docker-compose.dev.yml文件内容信息如下： ###

> \[root@c720120 docker\]\# cat docker-compose.dev.yml  
> version: "3.5"  
> serives:  
>    web:  
>      build: web  
>      image: fundamentalsofdocker/ch08-web:1.0  
>      ports:  
>        - 3000:3000  
>    db:  
>      build: database  
>      image: fundamentalsofdocker/ch08-db:1.0  
>      volumes:  
>        - pets-data:/var/lib/postgresql/data
> 
> volumes:  
>    pets-data:  
>

### 2. 构建应用 ###

> \[root@c720120 docker\]\# docker-compose -f docker-compose.dev.yml build  
> Building web  
> Step 1/8 : FROM node:9.6-alpine  
> 9.6-alpine: Pulling from library/node  
> 605ce1bd3f31: Already exists  
> d9c1bb40879c: Already exists  
> d610e8516793: Already exists  
> Digest: sha256:7422a2653c781eb8280a9b811f0c5b605b54851fe458b09d9ccd6e04fbbca2ab  
> Status: Downloaded newer image for node:9.6-alpine  
>   ---> a88ff852e3d4  
> Step 2/8 : RUN mkdir /app  
>   ---> Running in 8682b617ceaf  
> Removing intermediate container 8682b617ceaf  
>   ---> 9a4a9446037f  
> Step 3/8 : WORKDIR /app  
> Removing intermediate container a32f8a2a0e50  
>   ---> ccf3294d5b31  
> Step 4/8 : COPY package.json /app/  
>   ---> b8168f45d652  
> Step 5/8 : RUN npm install  
>   ---> Running in 4c02c4300c8f  
> npm notice created a lockfile as package-lock.json. You should commit this file.  
> npm WARN pets@1.0.0 No repository field.
> 
> added 72 packages in 7.547s  
> Removing intermediate container 4c02c4300c8f  
>   ---> a15517e4c50f  
> Step 6/8 : COPY ./src /app/src  
>   ---> d0aadafe8907  
> Step 7/8 : EXPOSE 3000  
>   ---> Running in dd2cc2425dbe  
> Removing intermediate container dd2cc2425dbe  
>   ---> 1d9d1fa98ed2  
> Step 8/8 : CMD node src/server.js  
>   ---> Running in 5983df0ea47a  
> Removing intermediate container 5983df0ea47a  
>   ---> f0617a7838f1
> 
> Successfully built f0617a7838f1  
> Successfully tagged fundamentalsofdocker/ch08-web:1.0  
> Building db  
> Step 1/5 : FROM postgres:10.2-alpine  
> 10.2-alpine: Pulling from library/postgres  
> ff3a5c916c92: Already exists  
> a503b44e1ce0: Already exists  
> 211706713093: Already exists  
> 8df57d533e71: Already exists  
> 7858f71c02fb: Already exists  
> 55a8ef17ba59: Already exists  
> 3fb44f23d323: Already exists  
> 65cad41156b3: Already exists  
> 5492a5bead70: Already exists  
> Digest: sha256:2cdf8430d7c1f59b3d3808f672944491aabf0fdf15da5b5e158e9fa4162453bf  
> Status: Downloaded newer image for postgres:10.2-alpine  
>   ---> 400ef39e0dbf  
> Step 2/5 : COPY init-db.sql /docker-entrypoint-initdb.d/  
>   ---> 02a6cc6e59b0  
> Step 3/5 : ENV POSTGRES\_USER dockeruser  
>   ---> Running in de0ed866ac90  
> Removing intermediate container de0ed866ac90  
>   ---> d05dbfe63994  
> Step 4/5 : ENV POSTGRES\_PASSWORD dockerpass  
>   ---> Running in e399bd4c3345  
> Removing intermediate container e399bd4c3345  
>   ---> fbf42b96b732  
> Step 5/5 : ENV POSTGRES\_DB pets  
>   ---> Running in 4c811d6c99b9  
> Removing intermediate container 4c811d6c99b9  
>   ---> baaaf8ce22ba
> 
> Successfully built baaaf8ce22ba  
> Successfully tagged fundamentalsofdocker/ch08-db:1.0

### 3. 上传镜像前进行认证 ###

> \[root@c720120 docker\]\# docker login -u fundamentalsofdocker -p <password>

[![FGOU(EE$X6GN(XF3PRIO6D7][FGOU_EE_X6GN_XF3PRIO6D7]][FGOU_EE_X6GN_XF3PRIO6D7_FGOU_EE_X6GN_XF3PRIO6D7]

### 4. 登陆成功后，进行上传 ###

> \[root@c720120 docker\]\# docker-compose -f docker-compose.dev.yml  push  
> Pushing web (fundamentalsofdocker/ch08-web:1.0)...  
> The push refers to repository \[docker.io/fundamentalsofdocker/ch08-web\]  
> f457d7916b75: Preparing  
> 564bf5c38714: Preparing

转载于:https://www.cnblogs.com/zangxueyuan/p/9144954.html

[image]: https://images2018.cnblogs.com/blog/1416119/201806/1416119-20180606142827658-1156031263.png
[image 1]: https://images2018.cnblogs.com/blog/1416119/201806/1416119-20180606142827420-1621692115.png
[FGOU_EE_X6GN_XF3PRIO6D7]: https://images2018.cnblogs.com/blog/1416119/201806/1416119-20180606142828098-831091147.png
[FGOU_EE_X6GN_XF3PRIO6D7_FGOU_EE_X6GN_XF3PRIO6D7]: https://images2018.cnblogs.com/blog/1416119/201806/1416119-20180606142827876-549951791.png