【docker 总结】第七篇 - nodejs项目部署
node 项目部署
项目介绍
nodeapp 是一个用 Docker 搭建的本地 Node.js 应用开发与运行环境。
服务分类
db：使用 mariadb 作为应用的数据库（mariadb 开源版 MySql）
node：启动 node 服务
web：使用 nginx 作为应用的 web 服务器
app 目录结构
├── docker-compose.yml
└── images
├── nginx
│ └── config
│ └── default.conf
└── node
├── Dockerfile
└── web
├── package.json
├── public
│ └── index.html
└── server.js创建项目
根据以上目录结构和服务的规划，创建项目
BravedeMacBook-Pro:~ brave$ mkdir docker-demo
BravedeMacBook-Pro:~ brave$ cd docker-demo
BravedeMacBook-Pro:docker-demo brave$ mkdir nodeapp
BravedeMacBook-Pro:docker-demo brave$ cd nodeapp/
BravedeMacBook-Pro:nodeapp brave$ mkdir images
BravedeMacBook-Pro:nodeapp brave$ touch docker-compose.yml
BravedeMacBook-Pro:nodeapp brave$ ls
docker-compose.yml imagesdocker-compose.yml 的命名是固定死的，每当执行 docker compose up 时，会去当前目录下找到 docker-compose.yml 文件去启动
镜像的种类
node 镜像（自己写）
nginx 镜像（直接用）
mysql 镜像（直接用）
BravedeMacBook-Pro:nodeapp brave$ cd images
BravedeMacBook-Pro:images brave$ mkdir node // node 镜像
BravedeMacBook-Pro:images brave$ mkdir nginx // 放 nginx 配置文件
BravedeMacBook-Pro:images brave$ tree
.
|____nginx
|____node node 目录中创建 web 文件夹
BravedeMacBook-Pro:images brave$ cd node
BravedeMacBook-Pro:node brave$ mkdir web
BravedeMacBook-Pro:node brave$ cd web/前提：安装 node
BravedeMacBook-Pro:web brave$ npm -v
6.14.6初始化 node 项目
BravedeMacBook-Pro:web brave$ npm init -y
Wrote to /Users/brave/docker-demo/nodeapp/images/node/web/package.json:
{
"name": "web",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC"
}
╭───────────────────────────────────────────────────────────────╮
│ │
│ New major version of npm available! 6.14.6 → 8.3.0 │
│ Changelog: https://github.com/npm/cli/releases/tag/v8.3.0 │
│ Run npm install -g npm to update! │
│ │
╰───────────────────────────────────────────────────────────────╯创建 server.js
vi server.js
let http = require('http');
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'db',
user : 'root',
password : '123456',
database : 'nodeapp'
});
connection.connect();
http.createServer(function(req, res){
connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
if (error) throw error;
console.log('The solution is: ', results[0].solution);
res.end("solution:" + results[0].solution)
});
}).listen(3000, function(){
console.log('node server started at port 3000');
});安装 mysql
// mysql 生产依赖
BravedeMacBook-Pro:web brave$ npm install mysql -S
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN web@1.0.0 No description
npm WARN web@1.0.0 No repository field.
+ mysql@2.18.1
added 11 packages from 15 contributors and audited 11 packages in 14.514s
found 0 vulnerabilities添加 node 服务启动脚本：
vi package.json
{
"name": "web",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "node server.js" // 启动脚本
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"mysql": "^2.18.1"
}
}创建 public 目录，查看nodeapp 项目目录结构：
BravedeMacBook-Pro:web brave$ mkdir public
BravedeMacBook-Pro:web brave$ cd public/
BravedeMacBook-Pro:public brave$ echo index.html > index.html
BravedeMacBook-Pro:public brave$ ls
index.html
BravedeMacBook-Pro:public brave$ pwd
/Users/brave/docker-demo/nodeapp/images/node/web/public
BravedeMacBook-Pro:public brave$ cd ..
BravedeMacBook-Pro:web brave$ cd ..
BravedeMacBook-Pro:node brave$ cd ..
BravedeMacBook-Pro:images brave$ cd ..
BravedeMacBook-Pro:nodeapp brave$ tree
.
|____docker-compose.yml
|____images
| |____nginx
| |____node
| | |____web
| | | |____package.json
| | | |____package-lock.json
| | | |____public
| | | | |____index.html
| | | |____server.js访问静态页面，进入 public 目录
访问服务，进入 server.js 处理
服务写好了，我们需要将这个 node 服务制作成为一个镜像（mysql 和 nginx 使用现成的镜像就可以）
制作镜像
创建 DockerFile 文件
BravedeMacBook-Pro:nodeapp brave$ ls
docker-compose.yml images
BravedeMacBook-Pro:nodeapp brave$ cd images/
BravedeMacBook-Pro:images brave$ cd node/
BravedeMacBook-Pro:node brave$ vi Dockerfile
// Dockerfile
From node // 基于 node 镜像创建新镜像
MAINTAINER Brave // 指定维护者
COPY web /web // 拷贝项目：将当前项目中的 web 目录拷贝到镜像中
// 注意文件拷贝规则：当/web 不存在时，会将web拷贝过去，如果存在/web 会将 web 放到/web 目录下
WORKDIR /web // 指定工作目录为 web
RUN npm install // 在编译镜像时执行的命令：安装依赖
CMD npm start // 在运行容器时执行的命令：启动 node 服务 （docker run 时执行）回到 nodeapp 目录层级下，编写 docker-compose.yml
依赖关系：先启动 db 服务，再启动 node 服务，再启动 web 服务；
BravedeMacBook-Pro:node brave$ cd ..
BravedeMacBook-Pro:images brave$ cd ..
BravedeMacBook-Pro:nodeapp brave$ vi docker-compose.yml
// docker-compose.yml
version: "2" // 版本号，注意冒号后面需要有一个空格，否则执行会报错
services: // 声明服务
db: // db 服务
image: mariadb // 指定 db 服务使用的镜像
environment: // 设置环境变量
MYSQL_ROOT_PASSWORD: "123456"
MYSQL_DATABASE: "nodeapp"
MYSQL_USER: "root"
MYSQL_PASSWORD: "123456"
volumes: // 指定 db 服务使用的数据卷
- dbdata:/var/lib/mysql // 将容器的 /var/lib/mysql 映射到 宿主机的 dbdata 目录
node: // node 服务
build: // 需要构建镜像 镜像如果存在就不会编译了 需要加 --build
context: "./images/node" // 指定构建的上下文，构建时，基于哪个文件夹作为上下文目录
dockerfile: Dockerfile // 会去找 ./images/node/Dockerfile 文件
depends_on: // 依赖的容器
- db
web:
image: nginx
ports:
- "8080:80"
depends_on: // 依赖的容器
- node
volumes:
- "./images/nginx/conf.d:/etc/nginx/conf.d" // nginx 配置文件
- "./images/node/web/public:/public" // 静态文件
volumes： // 声明数据卷
dbdata:
driver: local编写 nginx 配置文件 conf.d/default.conf，配置静态/动态请求的处理规则
BravedeMacBook-Pro:nodeapp brave$ ls
docker-compose.yml images
BravedeMacBook-Pro:nodeapp brave$ cd images/
BravedeMacBook-Pro:images brave$ cd nginx/
BravedeMacBook-Pro:nginx brave$ mkdir conf.d
BravedeMacBook-Pro:nginx brave$ cd conf.d/
BravedeMacBook-Pro:conf.d brave$ vi default.conf
// default.conf
server {
listen 80;
server_name localhost http://127.0.0.1;
// 静态
location / {
root /public; // 注意：nginx 容器的 /public 目录已经映射到宿主机的 ./images/node/web/public
index index.html;
}
// 动态
location /api { // 以 /api 开头的请求
proxy_pass http://127.0.0.1:3000; // 为什么写http://node:3000 不行
}
}查看当前目录结构：
BravedeMacBook-Pro:nodeapp brave$ tree
.
|____docker-compose.yml
|____images
| |____nginx
| | |____conf.d
| | | |____default.conf
| |____node
| | |____Dockerfile
| | |____web
| | | |____package.json
| | | |____package-lock.json
| | | |____public
| | | | |____index.html
| | | |____server.js
| | | |____node_modules启动 docker compose：会先下载镜像，编译镜像，
docker compose up
docker compose up --build // 重新 build 否则修改不会生效备注：修改镜像后，需要重新编译才能生效
关闭防火墙，防火墙配置变更后需要重启 docker
centos：
systemctl stop firewalld.service
systemctl disable firewalld.serviceBravedeMacBook-Pro:nodeapp brave$ docker compose up --build
[+] Building 1.2s (9/9) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 31B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/node:latest 1.0s
=> [internal] load build context 0.0s
=> => transferring context: 11.01kB 0.0s
=> [1/4] FROM docker.io/library/node@sha256:13621aa823b6b92572d19c08a75f7b1a061633089f37873f8b5bedb5e900e657 0.0s
=> CACHED [2/4] COPY web /web 0.0s
=> CACHED [3/4] WORKDIR /web 0.0s
=> CACHED [4/4] RUN npm install 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:d0959f1669b0d14025f002e95fda0c78fb42fda35cfe6b7d9d32b889589b1e2c 0.0s
=> => naming to docker.io/library/nodeapp_node 0.0s
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
[+] Running 3/0
⠿ Container nodeapp-web-1 Created 0.0s
⠿ Container nodeapp-db-1 Created 0.0s
⠿ Container nodeapp-node-1 Created 0.0s
Attaching to nodeapp-db-1, nodeapp-node-1, nodeapp-web-1
nodeapp-db-1 | 2021-12-15 12:20:07+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.6.5+maria~focal started.
nodeapp-web-1 | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
nodeapp-web-1 | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
nodeapp-web-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
nodeapp-web-1 | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
nodeapp-web-1 | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
nodeapp-web-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
nodeapp-web-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
nodeapp-web-1 | /docker-entrypoint.sh: Configuration complete; ready for start up
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: using the "epoll" event method
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: nginx/1.21.4
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6)
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: OS: Linux 5.10.76-linuxkit
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: start worker processes
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: start worker process 31
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: start worker process 32
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: start worker process 33
nodeapp-web-1 | 2021/12/15 12:20:08 [notice] 1#1: start worker process 34
nodeapp-db-1 | 2021-12-15 12:20:08+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
nodeapp-db-1 | 2021-12-15 12:20:08+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.6.5+maria~focal started.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] mariadbd (server 10.6.5-MariaDB-1:10.6.5+maria~focal) starting as process 1 ...
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Number of pools: 1
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts)
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Using Linux native AIO
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Completed initialization of buffer pool
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: 128 rollback segments are active.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Creating shared tablespace for temporary tables
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: 10.6.5 started; log sequence number 42683; transaction id 14
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] Plugin 'FEEDBACK' is disabled.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Warning] You need to use --log-bin to make --expire-logs-days or --binlog-expire-logs-seconds work.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] Server socket created on IP: '0.0.0.0'.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] Server socket created on IP: '::'.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] InnoDB: Buffer pool(s) load completed at 211215 12:20:08
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Warning] 'proxies_priv' entry '@% root@4fcb1b050b06' ignored in --skip-name-resolve mode.
nodeapp-db-1 | 2021-12-15 12:20:08 0 [Note] mariadbd: ready for connections.
nodeapp-db-1 | Version: '10.6.5-MariaDB-1:10.6.5+maria~focal' socket: '/run/mysqld/mysqld.sock' port: 3306 mariadb.org binary distribution
nodeapp-node-1 |
nodeapp-node-1 | > web@1.0.0 start
nodeapp-node-1 | > node server.js
nodeapp-node-1 |
nodeapp-node-1 | node server started at port 3000测试动态，静态资源访问，链路是否通常（nginx->node->mysql）：
动态：
// 通过 nginx 访问 node 服务
BravedeMacBook-Pro:nodeapp brave$ curl http://localhost:8080/api
solution:2日志：
nodeapp-node-1 | The solution is: 2
nodeapp-web-1 | 172.28.0.1 - - [15/Dec/2021:13:19:18 +0000] "GET /api HTTP/1.1" 200 20 "-" "curl/7.64.1" "-"访问静态资源 index.html：
、BravedeMacBook-Pro:nodeapp brave$ curl http://localhost:8080/index.html
index.html日志
nodeapp-web-1 | 172.28.0.1 - - [15/Dec/2021:13:20:48 +0000] "GET /index.html HTTP/1.1" 200 11 "-" "curl/7.64.1" "-"