multistage build (enhancement)

.dockerignore

@@ -0,0 +1,21 @@
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Repo config
+.git
+
+# IDE configs
+.vscode
+.idea
+
+# Environment variables
+.env
+
+# Other
+website
+grafana
+integration_test
+prometheus

.goreleaser.yml

@@ -243,7 +243,7 @@ dockers:
   - image_templates:
     - '{{ if .IsSnapshot }}ghcr.io/{{ end }}ecadlabs/signatory:{{ if .IsSnapshot }}{{ .FullCommit }}{{ else }}{{ .Tag }}{{ end }}-amd64'
     - '{{ if not .IsSnapshot }}ecadlabs/signatory:latest-amd64{{ end }}'
-    dockerfile: Dockerfile
+    dockerfile: goreleaser.dockerfile
     use: buildx
     build_flag_templates:
     - "--pull"
@@ -256,7 +256,7 @@ dockers:
   - image_templates:
     - '{{ if .IsSnapshot }}ghcr.io/{{ end }}ecadlabs/signatory:{{ if .IsSnapshot }}{{ .FullCommit }}{{ else }}{{ .Tag }}{{ end }}-arm64'
     - '{{ if not .IsSnapshot }}ecadlabs/signatory:latest-arm64{{ end }}'
-    dockerfile: Dockerfile
+    dockerfile: goreleaser.dockerfile
     use: buildx
     build_flag_templates:
     - "--pull"
@@ -270,7 +270,7 @@ dockers:
   - image_templates:
     - '{{ if .IsSnapshot }}ghcr.io/{{ end }}ecadlabs/signatory:{{ if .IsSnapshot }}{{ .FullCommit }}{{ else }}{{ .Tag }}{{ end }}-armv7'
     - '{{ if not .IsSnapshot }}ecadlabs/signatory:latest-armv7{{ end }}'
-    dockerfile: Dockerfile
+    dockerfile: goreleaser.dockerfile
     use: buildx
     build_flag_templates:
     - "--pull"

Dockerfile

@@ -1,10 +1,17 @@
-FROM ubuntu:22.04
-RUN apt-get update
-RUN apt-get install -y curl apt-transport-https
-RUN apt-get clean
+FROM golang:1.21-bullseye AS builder
+RUN apt-get update && apt-get install
+ADD . /signatory
+WORKDIR /signatory
+RUN make
 
-COPY ./signatory /bin
-COPY ./signatory-cli /bin
-
-ENTRYPOINT ["/bin/signatory"]
+FROM debian:buster-slim
+WORKDIR /signatory
+RUN apt update -y \
+    && apt install -y curl apt-transport-https\
+    && rm -rf /var/lib/apt/lists/*
+COPY --from=builder /signatory/signatory.yaml /signatory/signatory.yaml
+COPY --from=builder /signatory/signatory /usr/bin/signatory
+COPY --from=builder /signatory/signatory-cli /usr/bin/signatory-cli
 
+ENTRYPOINT ["/usr/bin/signatory"]
+CMD [ "-c", "/signatory/signatory.yaml" ]

Makefile

@@ -16,7 +16,7 @@ signatory-cli:
 
 .PHONY: container
 container: signatory signatory-cli
-	docker build -t ecadlabs/signatory:$(CONTAINER_TAG) .
+	docker build -t ecadlabs/signatory:$(CONTAINER_TAG) -f goreleaser.dockerfile .
 
 clean:
 	rm signatory signatory-cli

goreleaser.dockerfile

@@ -0,0 +1,9 @@
+FROM ubuntu:22.04
+RUN apt-get update
+RUN apt-get install -y curl apt-transport-https
+RUN apt-get clean
+
+COPY ./signatory /bin
+COPY ./signatory-cli /bin
+
+ENTRYPOINT ["/bin/signatory"]