Docker Secret Demo
A more secure way to pass sensitive information to a Docker image at build time. Note, this are not Swarm Secrets
Requirements
- make
- docker
Usage
Run make run to build and run the Docker image. The go app will print both secure and insecure secrets to console.
Check docker history dockersecretdemo:
IMAGE CREATED CREATED BY SIZE COMMENT
507a2a7ab64d 18 seconds ago RUN |1 INSECURE_PASS=superInsecurePass123 /b… 4.1kB buildkit.dockerfile.v0
<missing> 18 seconds ago RUN |1 INSECURE_PASS=superInsecurePass123 /b… 29.4MB buildkit.dockerfile.v0
<missing> 18 seconds ago ENV INSECURE_PASS=superInsecurePass123 0B buildkit.dockerfile.v0
<missing> 18 seconds ago ARG INSECURE_PASS 0B buildkit.dockerfile.v0
<missing> 21 seconds ago COPY . . # buildkit 28.7kB buildkit.dockerfile.v0
<missing> 2 hours ago RUN /bin/sh -c go mod download # buildkit 4.1kB buildkit.dockerfile.v0
<missing> 2 hours ago COPY go.mod go.sum* ./ # buildkit 12.3kB buildkit.dockerfile.v0
<missing> 2 hours ago WORKDIR /app 8.19kB buildkit.dockerfile.v0
<missing> 32 hours ago /bin/sh -c #(nop) WORKDIR /go 0B
<missing> 32 hours ago /bin/sh -c mkdir -p "$GOPATH/src" "$GOPATH/b… 16.4kB
<missing> 32 hours ago /bin/sh -c #(nop) ENV PATH=/go/bin:/usr/loc… 0B
<missing> 32 hours ago /bin/sh -c #(nop) ENV GOPATH=/go 0B
<missing> 32 hours ago /bin/sh -c #(nop) ENV GOTOOLCHAIN=local 0B
<missing> 32 hours ago /bin/sh -c set -eux; apk add --no-cache --v… 254MB
<missing> 32 hours ago /bin/sh -c #(nop) ENV GOLANG_VERSION=1.21.5 0B
<missing> 32 hours ago /bin/sh -c #(nop) ENV PATH=/usr/local/go/bi… 0B
<missing> 32 hours ago /bin/sh -c apk add --no-cache ca-certificates 1.52MB
<missing> 2 days ago /bin/sh -c #(nop) CMD ["/bin/sh"] 0B
<missing> 2 days ago /bin/sh -c #(nop) ADD file:8182c73f869a899cf… 8.42MB Insecure argument passed using --build-arg is visible in the history. (lines 2, 3, 4) \