我有一个 golang 应用程序,我想对其进行 dockerize 并在 AWS Lambda 上运行。这是我的 Dockerfile:
FROM golang:1.21 as build
WORKDIR /app
RUN apt-get update
RUN apt-get install -y libvips libvips-dev
COPY go.mod go.sum ./
COPY main.go .
RUN GOOS=linux GOARCH=amd64 go build -o main main.go
FROM alpine:3.19
COPY --from=build /app/main /main
ENTRYPOINT [ "/main" ]
我安装 libvips 因为我使用 bimg 库进行图像压缩。
这是我的缩小版 Go 应用程序:
package main
import (
"context"
"log"
"github.com/aws/aws-lambda-go/events"
"github.com/aws/aws-lambda-go/lambda"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/h2non/bimg"
)
var (
s3Client *s3.Client
)
func init() {
cfg, err := config.LoadDefaultConfig(context.Background())
if err != nil {
log.Fatalf("failed to load AWS config: %v", err)
}
s3Client = s3.NewFromConfig(cfg)
}
func main() {
lambda.Start(Handler)
}
func Handler(ctx context.Context, event events.S3Event) error {
// compress and upload and do stuff
return nil
}
当我尝试从 aws 仪表板测试 lambda 时,我不仅收到错误
exec /main: no such file or directory
,而且当我尝试使用以下命令在本地计算机上运行图像时,它也会给我同样的错误:
docker run --rm -it s3-image-compressor-lambda:latest
我知道 lambda 无法在我的本地计算机上运行,但我相信它不应该说文件未找到,而是我期望出现运行时错误。
更新:我向 Dockerfile 添加了一些命令来尝试调试以查看发生了什么。
我在复制主文件之后添加了
RUN ls -l /
,这是输出:
#16 [stage-1 4/7] RUN ls -l /
#16 0.354 total 18668
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 bin
#16 0.354 drwxr-xr-x 5 root root 340 Apr 4 22:28 dev
#16 0.354 drwxr-xr-x 1 root root 4096 Apr 4 22:28 etc
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 home
#16 0.354 drwxr-xr-x 7 root root 4096 Jan 26 17:53 lib
#16 0.354 -rwxr-xr-x 1 root root 19055376 Apr 4 22:06 main
#16 0.354 drwxr-xr-x 5 root root 4096 Jan 26 17:53 media
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 mnt
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 opt
#16 0.354 dr-xr-xr-x 459 root root 0 Apr 4 22:28 proc
#16 0.354 drwx------ 2 root root 4096 Jan 26 17:53 root
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 run
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 sbin
#16 0.354 drwxr-xr-x 2 root root 4096 Jan 26 17:53 srv
#16 0.354 dr-xr-xr-x 13 root root 0 Apr 4 22:28 sys
#16 0.354 drwxrwxrwt 2 root root 4096 Jan 26 17:53 tmp
#16 0.354 drwxr-xr-x 7 root root 4096 Jan 26 17:53 usr
#16 0.354 drwxr-xr-x 12 root root 4096 Jan 26 17:53 var
#16 DONE 0.4s
所以根目录下其实有一个main文件。
之后我添加了
RUN /main
看看会发生什么,这是输出:
> [stage-1 8/8] RUN /main:
0.258 /bin/sh: /main: not found
我不认为
libvips
是问题所在。我怀疑你只需要制作一个完全独立的可执行文件(静态链接)。
FROM golang:1.21 as build
WORKDIR /app
RUN apt-get update
RUN apt-get install -y libvips libvips-dev
COPY go.mod go.sum main.go .
RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build \
-tags netgo \
-ldflags '-w -extldflags "-static"' \
-o main main.go
FROM alpine:3.19
RUN apk add --no-cache ca-certificates
COPY --from=build /app/main /main
ENTRYPOINT [ "/main" ]
go build
的各种标志和参数将确保