在本地 Docker 容器（Windows，wsl-2）下运行用 go 编写的服务器时出现问题

Question

我有一个用 golang 编写的服务器代码，它监听 http 并在我的开发机器上的localhost:27017连接到 mongodb，并且在同一主机上的 aws ec-2 实例上。 当我通过go run main.go运行它时，一切都运行良好。

sudo docker build -t server /mnt/c/code/tttfm/backend/server返回

 => [internal] load build definition from Dockerfile                                                                                           0.1s 
 => => transferring dockerfile: 38B                                                                                                            0.0s 
 => [internal] load .dockerignore                                                                                                              0.1s 
 => => transferring context: 2B                                                                                                                0.0s 
 => [internal] load metadata for docker.io/library/golang:1.16.3-buster                                                                        2.3s 
 => [1/6] FROM docker.io/library/golang:1.16.3-buster@sha256:2ff1a0d92edf6c2d4a2dd0d6bfa43e512c8b2f3aac738ffbb6195caf7cb38164                  0.0s 
 => [internal] load build context                                                                                                              0.2s 
 => => transferring context: 684B                                                                                                              0.2s 
 => CACHED [2/6] WORKDIR /code                                                                                                                 0.0s 
 => CACHED [3/6] RUN apt-get update                                                                                                            0.0s 
 => CACHED [4/6] RUN go get go.mongodb.org/mongo-driver/mongo                                                                                  0.0s 
 => CACHED [5/6] RUN go get github.com/google/uuid                                                                                             0.0s 
 => CACHED [6/6] COPY . .                                                                                                                      0.0s 
 => exporting to image                                                                                                                         0.0s 
 => => exporting layers                                                                                                                        0.0s 
 => => writing image sha256:9e215e06bf4ede636b31706af38497653bcaa5f3407de50ba7cc9a951be614bd                                                   0.0s 
 => => naming to docker.io/library/server 

但是当我试图运行它时退出 go 错误sudo docker run -it server

api/build/build.go:17:2: cannot find package
api/events/events.go:14:2: cannot find package
api/events/events.go:15:2: cannot find package
mongodb/mongodb.go:8:2: cannot find package
mongodb/mongodb.go:9:2: cannot find package

线条是

import...
"go.mongodb.org/mongo-driver/bson"
"github.com/google/uuid"

看起来像另一个导入良好的组件，例如：

    "net/http"
    api "./api"
    build "./api/build"
    mongodb "./mongodb"
    storage "./storage"
    webChat "./webChat"

但它依赖于外部组件：导入期间运行时的"github.com/google/uuid" and "go.mongodb.org/mongo-driver/bson" 。

dockerfile

FROM golang:1.16.3-buster
WORKDIR /code
RUN apt-get update
RUN go get go.mongodb.org/mongo-driver/mongo
RUN go get github.com/google/uuid
COPY . .

CMD ["go", "run", "main.go"]

我是码头工人的菜鸟，在 docker 容器下运行服务器时遇到问题。 可能是什么问题？ 非常感谢您的帮助

Answer 1

如评论中所述，您构建的容器完全错误。

我假设您正在使用go 模块。

我使用多阶段构建来创建小容器的正确方法。

在第一阶段，我们构建二进制文件。

在第二阶段，我们复制二进制文件并构建容器。

#First stage 
FROM golang:1.16-buster as builder
WORKDIR /app
COPY go.* ./
# Download dependencies 
RUN go mod download
# Copy local code to the container image.
COPY . .
# Build the binary.
RUN  go build -v -o BINERYNAME

# Secound stage 
FROM debian:buster-slim
RUN set -x && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
    ca-certificates && \
    rm -rf /var/lib/apt/lists/*
# Copy the binary  to  production image from the builder stage.
COPY --from=builder /app/BINERYNAME /app/BINERYNAME

# Run app on container startup.
CMD ["/app/BINERYNAME"]