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Multistage Docker build with scratch container #119

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76c0b29
Multistage Docker build with scratch container
joshdk Mar 6, 2018
a1a8acb
Updated readme with Docker image building instructions
joshdk Mar 6, 2018
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3 changes: 3 additions & 0 deletions .dockerignore
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.git/
tests/
screenshot/
22 changes: 15 additions & 7 deletions Dockerfile
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FROM alpine:3.4
# Define build image which compiles binary
FROM golang:1.9.2-alpine as build

RUN apk update && \
apk add -U --no-cache \
ca-certificates \
openssh-client && \
rm -rf /var/cache/apk/*
WORKDIR /go/src/github.com/appleboy/drone-ssh

COPY . .

RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -tags netgo \
&& cp drone-ssh /bin

# Define final image which consumes final artifact
FROM scratch

LABEL org.label-schema.version=latest
LABEL org.label-schema.vcs-url="https://github.com/appleboy/drone-ssh.git"
LABEL org.label-schema.name="drone-ssh"
LABEL org.label-schema.vendor="Bo-Yi Wu"
LABEL org.label-schema.schema-version="1.0"

ADD release/linux/amd64/drone-ssh /bin/
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

COPY --from=build /bin/drone-ssh /bin/

ENTRYPOINT ["/bin/drone-ssh"]
9 changes: 0 additions & 9 deletions README.md
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Expand Up @@ -24,18 +24,9 @@ go test
Build the docker image with the following commands:

```
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -tags netgo
docker build -t appleboy/drone-ssh .
```

Please note incorrectly building the image for the correct x64 linux and with
GCO disabled will result in an error when running the Docker image:

```
docker: Error response from daemon: Container command
'/bin/drone-ssh' not found or does not exist..
```

## Usage

Execute from the working directory:
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