演示工程

  1. package main
  3. import (
  4.     "github.com/gin-gonic/gin"
  5.     "net/http"
  6. )
  8. func main() {
  9.     r := gin.Default()
  10.     r.GET("/", func(c *gin.Context) {
  11.         c.JSON(http.StatusOK, gin.H{
  12.             "code":    0,
  13.             "message": "success",
  14.             "data":    "hello world",
  15.         })
  16.     })
  17.     r.GET("/hello", func(c *gin.Context) {
  18.         c.JSON(http.StatusOK, gin.H{
  19.             "code":    0,
  20.             "message": "success",
  21.             "data":    "world",
  22.         })
  23.     })
  24.     r.GET("/ping", func(c *gin.Context) {
  25.         c.JSON(http.StatusOK, gin.H{
  26.             "code":    0,
  27.             "message": "success",
  28.             "data":    "pong",
  29.         })
  30.     })
  31.     r.Run(":8080")
  32. }

Dockerfile

GO111MODULE=off 需要执行

  1.  go mod vendor
  1. FROM registry.cn-beijing.aliyuncs.com/baxiang/golang:1.14 as build
  2. ENV GO111MODULE=off
  3. ENV GOBUILDPATH=github.com/baxiang/hello-world
  4. RUN mkdir -p /go/src/${GOBUILDPATH}
  5. COPY ./ /go/src/${GOBUILDPATH}
  6. RUN cd /go/src/${GOBUILDPATH} && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go install -v
  9. FROM alpine as debug
  10. WORKDIR /hello-wordld
  11. COPY --from=build /go/bin/hello-world ./hello-world
  12. EXPOSE 8080
  13. CMD ["./hello-world"]

或者设置成GO111MODULE=on

  1. FROM registry.cn-beijing.aliyuncs.com/baxiang/golang:1.14 as build
  2. ENV GO111MODULE=on
  3. ENV GOPROXY=https://mirrors.aliyun.com/goproxy/
  4. ENV GOBUILDPATH=github.com/baxiang/hello-world
  5. RUN mkdir -p /go/src/${GOBUILDPATH}
  6. COPY ./ /go/src/${GOBUILDPATH}
  7. RUN cd /go/src/${GOBUILDPATH} && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go install -v
  10. FROM alpine as dev
  11. WORKDIR /hello-wordld
  12. COPY --from=build /go/bin/hello-world ./hello-world
  13. EXPOSE 8080
  14. CMD ["./hello-world"]

打包脚本采用Makefile

  1. DOCKER_REGISTRY  = registry.cn-beijing.aliyuncs.com/baxiang
  2. DOCKER_IMAGE     = hello-world
  3. DOCKER_FULL_NAME = $(DOCKER_REGISTRY)/$(DOCKER_IMAGE)
  4. DOCKER_TAG = v1.0
  8. .PHONY: docker
  9. docker:
  10.     @docker build --target dev  -t $(DOCKER_FULL_NAME):$(DOCKER_TAG) -f Dockerfile .
  11.     @docker push $(DOCKER_FULL_NAME):$(DOCKER_TAG)

go项目基于alpine 构建docker镜像，启动容器的时候一直报错 standard_init_linux.go:211: exec user process caused “no such file or directory”
动态链接的在微型镜像alpine上不支持。默认go使用静态链接，在docker的golang环境中默认是使用动态编译。
如果想使用docker编译+alpine部署，可以通过禁用cgo set CGO_ENABLED=0来解决。
如果要使用cgo可以通过go build —ldflags “-extldflags -static” 来让gcc使用静态编译。