k8s-note-01

docker install

https://docs.docker.com/desktop/previous-versions/2.x-mac/
docker --version

Docker version 19.03.13, build 4484c46d9d

{
  "experimental": false,
  "features": {
    "buildkit": true
  },
  "registry-mirrors": [
    "https://hub-mirror.c.163.com",
    "https://mirror.baidubce.com"
  ]
}

image.png

run nginx

docker run -d -p 80:80 --name webserver nginx

Unable to find image 'nginx:latest' locally
latest: Pulling from library/nginx
01b5b2efb836: Pull complete
db354f722736: Pull complete
abb02e674be5: Pull complete
214be53c3027: Pull complete
a69afcef752d: Pull complete
625184acb94e: Pull complete
Digest: sha256:c54fb26749e49dc2df77c6155e8b5f0f78b781b7f0eadd96ecfabdcdfa5b1ec4
Status: Downloaded newer image for nginx:latest
36e3bba8da3eb8fc2fd728c737cf6ad1a352232a62b73e70ae49666eb6054604

docker ps

CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS                NAMES
36e3bba8da3e        nginx               "/docker-entrypoint.…"   About a minute ago   Up About a minute   0.0.0.0:80->80/tcp   webserver

停止 Nginx 服务器并删除

docker stop webserver
docker rm webserver

访问 http://localhost/

image.png

run node app ,参考 https://docs.docker.com/get-started/02_our_app/

git clone https://github.com/docker/getting-started.git
cd getting-started/app
vim Dockerfile

Dockerfile 内容

# syntax=docker/dockerfile:1  
FROM node:18-alpine
WORKDIR /app
COPY . .
RUN yarn install --production
CMD ["node", "src/index.js"]
EXPOSE 3000

build -t getting-started .
docker images
docker run -dp 3000:3000 --name node-app getting-started
http://localhost:3000/

image.png

golang app

go mod init docker.demo
vim main.go

package main

import (
    "net/http"
    "os"

    "github.com/labstack/echo/v4"
    "github.com/labstack/echo/v4/middleware"
)

func main() {

    e := echo.New()

    e.Use(middleware.Logger())
    e.Use(middleware.Recover())

    e.GET("/", func(c echo.Context) error {
        return c.HTML(http.StatusOK, "Hello, Docker! <3")
    })

    e.GET("/ping", func(c echo.Context) error {
        return c.JSON(http.StatusOK, struct{ Status string }{Status: "OK"})
    })

    httpPort := os.Getenv("HTTP_PORT")
    if httpPort == "" {
        httpPort = "8080"
    }

    e.Logger.Fatal(e.Start(":" + httpPort))
}

vim Dockerfile

# syntax=docker/dockerfile:1

FROM golang:1.17-alpine

WORKDIR /app

COPY go.mod ./
COPY go.sum ./
ENV GOPROXY "https://goproxy.cn,direct"
RUN go mod download

COPY *.go ./

RUN go build -o /docker-gs-ping

EXPOSE 8080

CMD [ "/docker-gs-ping" ]

docker build --tag docker-gs-ping-api .
docker run -dp 8080:8080 docker-gs-ping-api
curl http://localhost:8080/

vim docker-compose.yaml

version: "3.9"

services:
  app:
    ports:
      - "8080:8080"
    env_file: env
    build:
      dockerfile: Dockerfile
      context: .
    command: /docker-gs-ping
    container_name: ping-api

vim env

GOPROXY="https://goproxy.cn,direct"

docker-compose build
docker-compose up

Try Docker Compose

https://docs.docker.com/compose/gettingstarted/

ref

• https://docs.docker.com/
• https://docker_practice.gitee.io/install/mirror.html
• https://docs.docker.com/get-started/02_our_app/
• https://docs.docker.com/language/golang/build-images/
• https://hub.docker.com/r/docker/compose/#!
• https://github.com/docker/awesome-compose
• https://www.freecodecamp.org/news/the-docker-handbook/
• https://www.freecodecamp.org/news/author/farhanhasin/
• https://www.freecodecamp.org/news/the-kubernetes-handbook/