1.1 构建包含 reflex 的镜像
然后，克隆我放在 Github 上的项目：
[root@CentOS ~]# git clone https://github.com/wangy8961/go-docker-dev.git [root@CentOS ~]# cd go-docker-dev/
Golangreflex.gogo.modreflexreflex.confsh -c /usr/src/build.sh-r '(\.go$|go\.mod)' -s -- sh -c /usr/src/build.sh
build.sh/app#!/bin/bash
cd /app
# 编译，GO_BUILD_FLAGS 是可选的环境变量值
go build -o app ${GO_BUILD_FLAGS}
# 运行，APP_RUN_FLAGS 是可选的环境变量值
./app ${APP_RUN_FLAGS}
reflex -c /usr/src/reflex.confDockerfileFROM golang:1.12.5-stretch # 设置代理，因为后续 go get github.com/cespare/reflex 会下载依赖 golang.org/x/sys/unix 等 ENV HTTP_PROXY='socks5://127.0.0.1:1080' ENV HTTPS_PROXY='socks5://127.0.0.1:1080' # 安装 reflex 包 RUN go get github.com/cespare/reflex # 复制 reflex 的配置文件到容器中的根目录下 COPY reflex.conf /usr/src COPY build.sh /usr/src # 设置容器内的工作目录，用于 RUN, CMD, ENTRYPOINT, COPY, ADD 等指令 WORKDIR /app # 容器启动时，运行 reflex -c /usr/src/reflex.conf # 由于工作目录已切换到 /app，所以 reflex 会监控 /app 目录下的 .go 或 go.mod 文件的变化 ENTRYPOINT ["reflex", "-c", "/usr/src/reflex.conf"]
1080--network host[root@CentOS go-docker-dev]# docker build --network host -t go-docker-dev:latest . Sending build context to Docker daemon 75.26kB Step 1/8 : FROM golang:1.12.5-stretch ---> 7ced090ee82e Step 2/8 : ENV HTTP_PROXY='socks5://127.0.0.1:1080' ---> Running in 253791251a63 Removing intermediate container 253791251a63 ---> c786afb6d6db Step 3/8 : ENV HTTPS_PROXY='socks5://127.0.0.1:1080' ---> Running in cfca59a05f33 Removing intermediate container cfca59a05f33 ---> 6aef3386ba42 Step 4/8 : RUN go get github.com/cespare/reflex ---> Running in fe62a278b71c Removing intermediate container fe62a278b71c ---> 0719584291f8 Step 5/8 : COPY reflex.conf /usr/src ---> ab3a4f0441e9 Step 6/8 : COPY build.sh /usr/src ---> 9fd7880705d3 Step 7/8 : WORKDIR /app ---> Running in 505b279617b5 Removing intermediate container 505b279617b5 ---> 5e36e28a80b5 Step 8/8 : ENTRYPOINT ["reflex", "-c", "/usr/src/reflex.conf"] ---> Running in dab2661248e8 Removing intermediate container dab2661248e8 ---> 4b966b116294 Successfully built 4b966b116294 Successfully tagged go-docker-dev:latest
1.2 新建 Golang 项目
Go Modulesgo-example[root@CentOS go-docker-dev]# mkdir go-example [root@CentOS go-docker-dev]# cd go-example/ [root@CentOS go-example]# go mod init go-example go: creating new go.mod: module go-example [root@CentOS go-example]# cat go.mod module go-example go 1.12
VSCodenet/httpgo-docker-dev/go-example/main.gopackage main
import (
"flag"
"fmt"
"log"
"net/http"
)
func main() {
port := flag.Int("port", 50051, "the port to serve on")
flag.Parse()
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello, you've requested: %s\n", r.URL.Path)
})
err := http.ListenAndServe(fmt.Sprintf(":%d", *port), nil)
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
fmt.Printf("server listening on port: %v\n", fmt.Sprintf(":%d", *port))
}
-port 80启动容器：
[root@CentOS go-docker-dev]# docker run -d \ --name go-example \ -e "APP_RUN_FLAGS=-port 80" \ -p 80:80 \ --rm \ -v $PWD/go-example:/app \ go-docker-dev:latest b78cfaf9eac6147ca9cf6c84eb2355057a1d1323a086b2a3fd987495e44edc63 [root@CentOS go-docker-dev]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b78cfaf9eac6 go-docker-dev:latest "reflex -c /usr/src/…" 4 seconds ago Up 3 seconds 0.0.0.0:80->80/tcp go-example
你可以进去容器内部看看它启动了哪些进程：
[root@CentOS go-docker-dev]# docker exec -it go-example /bin/bash root@b78cfaf9eac6:/app# ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 06:48 ? 00:00:00 reflex -c /usr/src/reflex.conf root 17 1 0 06:48 pts/0 00:00:00 sh -c /usr/src/build.sh root 18 17 0 06:48 pts/0 00:00:00 /bin/bash /usr/src/build.sh root 125 18 0 06:48 pts/0 00:00:00 ./app -port 80 # 我们通过环境变量和 build.sh 来指定命令行参数 root 131 0 4 06:51 pts/1 00:00:00 /bin/bash root 138 131 0 06:51 pts/1 00:00:00 ps -ef root@b78cfaf9eac6:/app# exit exit
192.168.40.128
main.gofunc main() {
...
fs := http.FileServer(http.Dir("static/"))
http.Handle("/static/", http.StripPrefix("/static/", fs))
...
}
reflexgo-docker-dev/go-example/static/madmalls.jpg然后，你再通过浏览器访问：
你只需要先安装 Dokcer 和 Docker Compose，并克隆我放在 Github 上的项目：
[root@CentOS ~]# git clone https://github.com/wangy8961/go-docker-dev.git [root@CentOS ~]# cd go-docker-dev/
docker-compose.ymlportsvolumes/app/appbuild.shversion: "3.7"
services:
go-example:
# building image from ./Dockerfile, and change network mode to 'host', because 'go get' need proxy in Dockerfile
build:
context: .
network: host
# specify the image name after builded
image: go-docker-dev:latest
ports:
- "80:80"
# go-example is your Golang project name,
# don't change the target path '/app', because 'reflex' will go to there and then run 'go build .'
volumes:
- "$PWD/go-example:/app"
# specify container name
container_name: go-example
# environment file
env_file:
- .env
go-docker-dev/go-example.envGO_BUILD_FLAGS=-race APP_RUN_FLAGS=-port 80
Docker Compose127.0.0.1:1080[root@CentOS go-docker-dev]# docker-compose up Building go-example Step 1/8 : FROM golang:1.12.5-stretch ---> 7ced090ee82e Step 2/8 : ENV HTTP_PROXY='socks5://127.0.0.1:1080' ---> Running in c90a5c67b8a3 Removing intermediate container c90a5c67b8a3 ---> b4a255b862a0 Step 3/8 : ENV HTTPS_PROXY='socks5://127.0.0.1:1080' ---> Running in e186621097a4 Removing intermediate container e186621097a4 ---> c52fcc75f69c Step 4/8 : RUN go get github.com/cespare/reflex ---> Running in 413f495624b7 Removing intermediate container 413f495624b7 ---> ce99643777f7 Step 5/8 : COPY reflex.conf /usr/src ---> ba5af0210f69 Step 6/8 : COPY build.sh /usr/src ---> a13e467a9ffd Step 7/8 : WORKDIR /app ---> Running in f372bcfd30f3 Removing intermediate container f372bcfd30f3 ---> 6b50f6a9d219 Step 8/8 : ENTRYPOINT ["reflex", "-c", "/usr/src/reflex.conf"] ---> Running in ae580ee69746 Removing intermediate container ae580ee69746 ---> 33efe4b5ac0f Successfully built 33efe4b5ac0f Successfully tagged go-docker-dev:latest WARNING: Image for service go-example was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --bui ld`.Creating go-example ... done Attaching to go-example go-example | [00] Starting service
docker-compose up -d