Docker 部署 Goalng单体应用
示例 1: 纯 Golang 项目的部署, 如果需要排除某个文件/目录, 编写.dockerignore文件即可, 与.gitignore文件格式相同
FROM golang:1.21 AS builder
MAINTAINER Lookeke
ENV VERSION 1.0
WORKDIR /app
# 拷贝当前目录下可以执行文件
COPY . .
RUN go env -w GOPROXY=https://proxy.golang.com.cn,direct
# 里要加-tags netgo进行静态编译，否则由于alipne基础镜像缺少必要的动态库，可能会出现类似“no such file or directory"的报错
# 或者直接禁用gcc，然后进行编译
RUN go mod download
RUN go env -w CGO_ENABLED=0 GOOS=linux GOARCH=amd64
RUN go build -o myapp .
FROM alpine:latest
WORKDIR /app
# 从 builder 镜像中复制 Go 二进制文件到当前镜像中
COPY --from=builder /app/myapp .
# 设置时区为上海
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
RUN echo 'Asia/Shanghai' >/etc/timezone
# 设置编码
ENV LANG C.UTF-8
# 暴露端口
EXPOSE 4000
# 定义容器启动时运行的命令
ENTRYPOINT ["/app/myapp"]
docker-compose.yml
version: '3'
services:
tiktok:
image: <image>
container_name: <container_name>
restart: always
ports:
- "8080:8080"
- "4000:4000"
volumes:
- ./configs:/data/conf
environment:
- TZ=Asia/Shanghai
command: ["/app/<image>", "-conf", "/data/conf"]
构建 Docker 镜像
将
image:web# 这里需要替换成你使用Docker build的名字
语法:
docker build [--progress=plain] [--no-cache] -t <image_name> <path>
例: 在当前目录构建所有文件, 镜像名为web, 不使用Docker缓存, 显示构建过程的详细信息
- --progress=plain: 构建过程中显示的详细信息的格式
- --no-cache : 不使用缓存
- web : 构建的镜像名
- . : 当前目录所有文件
docker build --progress=plain --no-cache -t goapp .
如果不在当前目录, 使用选项
-f
例:
docker-compose -f ./build/ci/frontent/docker-compose.yml up -d
.dockerignore
# Reference https://github.com/github/gitignore/blob/master/Go.gitignore
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
vendor/
# Go workspace file
go.work
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# OS General
Thumbs.db
.DS_Store
# project
*.cert
*.key
*.log
bin/
# Develop tools
.vscode/
.idea/
*.swp
延伸
- 查看镜像大小, 继续缩小容器大小
docker image history <image_id>
- 尝试使用更极致大小的镜像
scratch, a completely empty base image.
scratch，则为完全空的基础映像。[distroless/static-debian](https://github.com/GoogleContainerTools/distroless), built on top of scratch, about 2MB in size, includingCA,root user, etc. It is only half the size ofalpine, and is used by many as the Go base image.
[distroless/static-debian](https://github.com/GoogleContainerTools/distroless)，建立在零开始之上，大小约为 2MB，包括CA、root user等。它只有 的alpine一半大小，被许多人用作 Go 基础映像。