Multi-stage Docker builds (#2850)

This builds on @S7evinK's work to make multi-stage Docker builds. Now that we can build SQLite without Cgo this should be much simpler and should make Docker builds in CI significantly faster. Co-authored-by: Till Faelligen <tfaelligen@gmail.com> Co-authored-by: Till Faelligen <davidf@element.io> Co-authored-by: Till Faelligen <2353100+S7evinK@users.noreply.github.com>
2024-11-08 18:16:59 +00:00 · 2022-11-02 14:04:08 +00:00 · 2022-11-02 14:04:08 +00:00 · ca8bc87380
commit ca8bc87380
parent 51ab0a8ccf
13 changed files with 254 additions and 146 deletions
--- a/.github/workflows/dendrite.yml
+++ b/.github/workflows/dendrite.yml
@ -297,7 +297,7 @@ jobs:
        SYTEST_BRANCH: ${{ github.head_ref }}
        CGO_ENABLED: ${{ matrix.cgo && 1 }}
    steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
      - name: Run Sytest
        run: /bootstrap.sh dendrite
        working-directory: /src
@ -364,8 +364,8 @@ jobs:
          sudo apt-get update && sudo apt-get install -y libolm3 libolm-dev
          go get -v github.com/gotesttools/gotestfmt/v2/cmd/gotestfmt@latest

-      - name: Run actions/checkout@v2 for dendrite
-        uses: actions/checkout@v2
+      - name: Run actions/checkout@v3 for dendrite
+        uses: actions/checkout@v3
        with:
          path: dendrite

--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@ -21,26 +21,32 @@ jobs:
  monolith:
    name: Monolith image
    runs-on: ubuntu-latest
+    needs: build-flags
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Get release tag
+        uses: actions/checkout@v3
+      - name: Get release tag & build flags
        if: github.event_name == 'release' # Only for GitHub releases
-        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+        run: |
+          echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+          echo "BUILD=$(git rev-parse --short HEAD || "") >> $GITHUB_ENV
+          BRANCH=$(git symbolic-ref --short HEAD | tr -d \/)
+          [ ${BRANCH} == "main" ] && BRANCH=""
+          echo "BRANCH=${BRANCH}" >> $GITHUB_ENV
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
      - name: Login to Docker Hub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          username: ${{ env.DOCKER_HUB_USER }}
          password: ${{ secrets.DOCKER_TOKEN }}
      - name: Login to GitHub Containers
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
@ -49,27 +55,41 @@ jobs:
      - name: Build main monolith image
        if: github.ref_name == 'main'
        id: docker_build_monolith
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.monolith
+          build-args: FLAGS="-X github.com/matrix-org/dendrite/internal.branch=${{ env.BRANCH }} -X github.com/matrix-org/dendrite/internal.build=${{ env.BUILD }}"
+          target: monolith
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
            ${{ env.DOCKER_NAMESPACE }}/dendrite-monolith:${{ github.ref_name }}
            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-monolith:${{ github.ref_name }}

+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-monolith:${{ github.ref_name }}
+          format: "sarif"
+          output: "trivy-results.sarif"
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: "trivy-results.sarif"
+
      - name: Build release monolith image
        if: github.event_name == 'release' # Only for GitHub releases
        id: docker_build_monolith_release
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.monolith
+          build-args: FLAGS="-X github.com/matrix-org/dendrite/internal.branch=${{ env.BRANCH }} -X github.com/matrix-org/dendrite/internal.build=${{ env.BUILD }}"
+          target: monolith
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
@ -81,26 +101,32 @@ jobs:
  polylith:
    name: Polylith image
    runs-on: ubuntu-latest
+    needs: build-flags
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Get release tag
+        uses: actions/checkout@v3
+      - name: Get release tag & build flags
        if: github.event_name == 'release' # Only for GitHub releases
-        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+        run: |
+          echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+          echo "BUILD=$(git rev-parse --short HEAD || "") >> $GITHUB_ENV
+          BRANCH=$(git symbolic-ref --short HEAD | tr -d \/)
+          [ ${BRANCH} == "main" ] && BRANCH=""
+          echo "BRANCH=${BRANCH}" >> $GITHUB_ENV
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
      - name: Login to Docker Hub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          username: ${{ env.DOCKER_HUB_USER }}
          password: ${{ secrets.DOCKER_TOKEN }}
      - name: Login to GitHub Containers
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
@ -109,27 +135,40 @@ jobs:
      - name: Build main polylith image
        if: github.ref_name == 'main'
        id: docker_build_polylith
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.polylith
+          build-args: FLAGS="-X github.com/matrix-org/dendrite/internal.branch=${{ env.BRANCH }} -X github.com/matrix-org/dendrite/internal.build=${{ env.BUILD }}"
+          target: polylith
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
            ${{ env.DOCKER_NAMESPACE }}/dendrite-polylith:${{ github.ref_name }}
            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-polylith:${{ github.ref_name }}

+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-polylith:${{ github.ref_name }}
+          format: "sarif"
+          output: "trivy-results.sarif"
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: "trivy-results.sarif"
+
      - name: Build release polylith image
        if: github.event_name == 'release' # Only for GitHub releases
        id: docker_build_polylith_release
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.polylith
+          target: polylith
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
@ -141,59 +180,99 @@ jobs:
  demo-pinecone:
    name: Pinecone demo image
    runs-on: ubuntu-latest
+    needs: build-flags
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Get release tag
+        uses: actions/checkout@v3
+      - name: Get release tag & build flags
        if: github.event_name == 'release' # Only for GitHub releases
-        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+        run: |
+          echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+          echo "BUILD=$(git rev-parse --short HEAD || "") >> $GITHUB_ENV
+          BRANCH=$(git symbolic-ref --short HEAD | tr -d \/)
+          [ ${BRANCH} == "main" ] && BRANCH=""
+          echo "BRANCH=${BRANCH}" >> $GITHUB_ENV
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
      - name: Login to Docker Hub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          username: ${{ env.DOCKER_HUB_USER }}
          password: ${{ secrets.DOCKER_TOKEN }}
      - name: Login to GitHub Containers
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

-      - name: Build main pinecone demo image
+      - name: Build main Pinecone demo image
        if: github.ref_name == 'main'
        id: docker_build_demo_pinecone
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.demo-pinecone
+          target: demo-pinecone
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-pinecone:${{ github.ref_name }}
            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-pinecone:${{ github.ref_name }}

-      - name: Build release pinecone demo image
+      - name: Build release Pinecone demo image
        if: github.event_name == 'release' # Only for GitHub releases
        id: docker_build_demo_pinecone_release
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
-          file: ./build/docker/Dockerfile.demo-pinecone
+          build-args: FLAGS="-X github.com/matrix-org/dendrite/internal.branch=${{ env.BRANCH }} -X github.com/matrix-org/dendrite/internal.build=${{ env.BUILD }}"
+          target: demo-pinecone
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: |
-            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-pinecone:latest
-            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-pinecone:${{ env.RELEASE_VERSION }}
-            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-pinecone:latest
-            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-pinecone:${{ env.RELEASE_VERSION }}
+            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-yggdrasil:latest
+            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-yggdrasil:${{ env.RELEASE_VERSION }}
+            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-yggdrasil:latest
+            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-yggdrasil:${{ env.RELEASE_VERSION }}
+
+      - name: Build main Yggdrasil demo image
+        if: github.ref_name == 'main'
+        id: docker_build_demo_yggdrasil
+        uses: docker/build-push-action@v3
+        with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          context: .
+          target: demo-yggdrasil
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          tags: |
+            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-yggdrasil:${{ github.ref_name }}
+            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-yggdrasil:${{ github.ref_name }}
+
+      - name: Build release Yggdrasil demo image
+        if: github.event_name == 'release' # Only for GitHub releases
+        id: docker_build_demo_yggdrasil_release
+        uses: docker/build-push-action@v3
+        with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          context: .
+          build-args: FLAGS="-X github.com/matrix-org/dendrite/internal.branch=${{ env.BRANCH }} -X github.com/matrix-org/dendrite/internal.build=${{ env.BUILD }}"
+          target: demo-yggdrasil
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          tags: |
+            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-yggdrasil:latest
+            ${{ env.DOCKER_NAMESPACE }}/dendrite-demo-yggdrasil:${{ env.RELEASE_VERSION }}
+            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-yggdrasil:latest
+            ghcr.io/${{ env.GHCR_NAMESPACE }}/dendrite-demo-yggdrasil:${{ env.RELEASE_VERSION }}
--- a/122
+++ b/122
@ -0,0 +1,122 @@
+#syntax=docker/dockerfile:1.2
+
+#
+# base installs required dependencies and runs go mod download to cache dependencies
+#
+FROM --platform=${BUILDPLATFORM} docker.io/golang:1.19-alpine AS base
+RUN apk --update --no-cache add bash build-base curl
+
+#
+# build creates all needed binaries
+#
+FROM base AS build
+WORKDIR /src
+ARG TARGETOS
+ARG TARGETARCH
+ARG FLAGS
+RUN --mount=target=. \
+    --mount=type=cache,target=/root/.cache/go-build \
+    USERARCH=`go env GOARCH` \
+    GOARCH="$TARGETARCH" \
+    GOOS="linux" \
+    CGO_ENABLED=$([ "$TARGETARCH" = "$USERARCH" ] && echo "1" || echo "0") \
+    go build -v -ldflags="${FLAGS}" -trimpath -o /out/ ./cmd/...
+
+#
+# The dendrite base image; mainly creates a user and switches to it
+#
+FROM alpine:latest AS dendrite-base
+LABEL org.opencontainers.image.description="Next-generation Matrix homeserver written in Go"
+LABEL org.opencontainers.image.source="https://github.com/matrix-org/dendrite"
+LABEL org.opencontainers.image.licenses="Apache-2.0"
+LABEL org.opencontainers.image.documentation="https://matrix-org.github.io/dendrite/"
+LABEL org.opencontainers.image.vendor="The Matrix.org Foundation C.I.C."
+RUN addgroup dendrite && adduser dendrite -G dendrite -u 1337 -D
+USER dendrite
+WORKDIR /home/dendrite
+
+#
+# Builds the polylith image and only contains the polylith binary
+#
+FROM dendrite-base AS polylith
+LABEL org.opencontainers.image.title="Dendrite (Polylith)"
+
+COPY --from=build /out/dendrite-polylith-multi /usr/bin/
+
+ENTRYPOINT ["/usr/bin/dendrite-polylith-multi"]
+
+#
+# Builds the monolith image and contains all required binaries
+#
+FROM dendrite-base AS monolith
+LABEL org.opencontainers.image.title="Dendrite (Monolith)"
+
+COPY --from=build /out/create-account /usr/bin/create-account
+COPY --from=build /out/generate-config /usr/bin/generate-config
+COPY --from=build /out/generate-keys /usr/bin/generate-keys
+COPY --from=build /out/dendrite-monolith-server /usr/bin/dendrite-monolith-server
+
+ENTRYPOINT ["/usr/bin/dendrite-monolith-server"]
+EXPOSE 8008 8448
+
+#
+# Builds the Pinecone P2P demo image and contains all required binaries
+#
+FROM dendrite-base AS demo-pinecone
+LABEL org.opencontainers.image.title="Dendrite (Pinecone P2P Demo)"
+
+COPY --from=build /out/create-account /usr/bin/create-account
+COPY --from=build /out/generate-config /usr/bin/generate-config
+COPY --from=build /out/generate-keys /usr/bin/generate-keys
+COPY --from=build /out/dendrite-demo-pinecone /usr/bin/dendrite-demo-pinecone
+
+VOLUME /etc/dendrite
+WORKDIR /etc/dendrite
+
+ENTRYPOINT ["/usr/bin/dendrite-demo-pinecone"]
+EXPOSE 8008 8448
+
+#
+# Builds the Yggdrasil P2P demo image and contains all required binaries
+#
+FROM dendrite-base AS demo-yggdrasil
+LABEL org.opencontainers.image.title="Dendrite (Yggdrasil P2P Demo)"
+
+COPY --from=build /out/create-account /usr/bin/create-account
+COPY --from=build /out/generate-config /usr/bin/generate-config
+COPY --from=build /out/generate-keys /usr/bin/generate-keys
+COPY --from=build /out/dendrite-demo-yggdrasil /usr/bin/dendrite-demo-yggdrasil
+
+VOLUME /etc/dendrite
+WORKDIR /etc/dendrite
+
+ENTRYPOINT ["/usr/bin/dendrite-demo-yggdrasil"]
+EXPOSE 8008 8448
+
+#
+# Builds the Complement image, used for integration tests
+#
+FROM base AS complement
+LABEL org.opencontainers.image.title="Dendrite (Complement)"
+RUN apk add --no-cache sqlite openssl ca-certificates
+
+COPY --from=build /out/generate-config /usr/bin/generate-config
+COPY --from=build /out/generate-keys /usr/bin/generate-keys
+COPY --from=build /out/dendrite-monolith-server /usr/bin/dendrite-monolith-server
+
+WORKDIR /dendrite
+RUN /usr/bin/generate-keys --private-key matrix_key.pem && \
+    mkdir /ca && \
+    openssl genrsa -out /ca/ca.key 2048 && \
+    openssl req -new -x509 -key /ca/ca.key -days 3650 -subj "/C=GB/ST=London/O=matrix.org/CN=Complement CA" -out /ca/ca.crt
+
+ENV SERVER_NAME=localhost
+ENV API=0
+EXPOSE 8008 8448
+
+# At runtime, generate TLS cert based on the CA now mounted at /ca
+# At runtime, replace the SERVER_NAME with what we are told
+CMD /usr/bin/generate-keys --server $SERVER_NAME --tls-cert server.crt --tls-key server.key --tls-authority-cert /ca/ca.crt --tls-authority-key /ca/ca.key && \
+    /usr/bin/generate-config -server $SERVER_NAME --ci > dendrite.yaml && \
+    cp /ca/ca.crt /usr/local/share/ca-certificates/ && update-ca-certificates && \
+    /usr/bin/dendrite-monolith-server --really-enable-open-registration --tls-cert server.crt --tls-key server.key --config dendrite.yaml -api=${API:-0}
--- a/build/dendritejs-pinecone/jsServer.go
+++ b/build/dendritejs-pinecone/jsServer.go
--- a/build/dendritejs-pinecone/main.go
+++ b/build/dendritejs-pinecone/main.go
--- a/build/dendritejs-pinecone/main_noop.go
+++ b/build/dendritejs-pinecone/main_noop.go
--- a/build/dendritejs-pinecone/main_test.go
+++ b/build/dendritejs-pinecone/main_test.go
--- a/build/docker/Dockerfile.demo-pinecone
+++ b/build/docker/Dockerfile.demo-pinecone
@ -1,25 +0,0 @@
-FROM docker.io/golang:1.19-alpine AS base
-
-RUN apk --update --no-cache add bash build-base
-
-WORKDIR /build
-
-COPY . /build
-
-RUN mkdir -p bin
-RUN go build -trimpath -o bin/ ./cmd/dendrite-demo-pinecone
-RUN go build -trimpath -o bin/ ./cmd/create-account
-RUN go build -trimpath -o bin/ ./cmd/generate-keys
-
-FROM alpine:latest
-LABEL org.opencontainers.image.title="Dendrite (Pinecone demo)"
-LABEL org.opencontainers.image.description="Next-generation Matrix homeserver written in Go"
-LABEL org.opencontainers.image.source="https://github.com/matrix-org/dendrite"
-LABEL org.opencontainers.image.licenses="Apache-2.0"
-
-COPY --from=base /build/bin/* /usr/bin/
-
-VOLUME /etc/dendrite
-WORKDIR /etc/dendrite
-
-ENTRYPOINT ["/usr/bin/dendrite-demo-pinecone"]
--- a/build/docker/Dockerfile.demo-yggdrasil
+++ b/build/docker/Dockerfile.demo-yggdrasil
@ -1,25 +0,0 @@
-FROM docker.io/golang:1.19-alpine AS base
-
-RUN apk --update --no-cache add bash build-base
-
-WORKDIR /build
-
-COPY . /build
-
-RUN mkdir -p bin
-RUN go build -trimpath -o bin/ ./cmd/dendrite-demo-yggdrasil
-RUN go build -trimpath -o bin/ ./cmd/create-account
-RUN go build -trimpath -o bin/ ./cmd/generate-keys
-
-FROM alpine:latest
-LABEL org.opencontainers.image.title="Dendrite (Yggdrasil demo)"
-LABEL org.opencontainers.image.description="Next-generation Matrix homeserver written in Go"
-LABEL org.opencontainers.image.source="https://github.com/matrix-org/dendrite"
-LABEL org.opencontainers.image.licenses="Apache-2.0"
-
-COPY --from=base /build/bin/* /usr/bin/
-
-VOLUME /etc/dendrite
-WORKDIR /etc/dendrite
-
-ENTRYPOINT ["/usr/bin/dendrite-demo-yggdrasil"]
--- a/build/docker/Dockerfile.monolith
+++ b/build/docker/Dockerfile.monolith
@ -1,25 +0,0 @@
-FROM docker.io/golang:1.19-alpine AS base
-
-RUN apk --update --no-cache add bash build-base
-
-WORKDIR /build
-
-COPY . /build
-
-RUN mkdir -p bin
-RUN go build -trimpath -o bin/ ./cmd/dendrite-monolith-server
-RUN go build -trimpath -o bin/ ./cmd/create-account
-RUN go build -trimpath -o bin/ ./cmd/generate-keys
-
-FROM alpine:latest
-LABEL org.opencontainers.image.title="Dendrite (Monolith)"
-LABEL org.opencontainers.image.description="Next-generation Matrix homeserver written in Go"
-LABEL org.opencontainers.image.source="https://github.com/matrix-org/dendrite"
-LABEL org.opencontainers.image.licenses="Apache-2.0"
-
-COPY --from=base /build/bin/* /usr/bin/
-
-VOLUME /etc/dendrite
-WORKDIR /etc/dendrite
-
-ENTRYPOINT ["/usr/bin/dendrite-monolith-server"]
--- a/build/docker/Dockerfile.polylith
+++ b/build/docker/Dockerfile.polylith
@ -1,25 +0,0 @@
-FROM docker.io/golang:1.19-alpine AS base
-
-RUN apk --update --no-cache add bash build-base
-
-WORKDIR /build
-
-COPY . /build
-
-RUN mkdir -p bin
-RUN go build -trimpath -o bin/ ./cmd/dendrite-polylith-multi
-RUN go build -trimpath -o bin/ ./cmd/create-account
-RUN go build -trimpath -o bin/ ./cmd/generate-keys
-
-FROM alpine:latest
-LABEL org.opencontainers.image.title="Dendrite (Polylith)"
-LABEL org.opencontainers.image.description="Next-generation Matrix homeserver written in Go"
-LABEL org.opencontainers.image.source="https://github.com/matrix-org/dendrite"
-LABEL org.opencontainers.image.licenses="Apache-2.0"
-
-COPY --from=base /build/bin/* /usr/bin/
-
-VOLUME /etc/dendrite
-WORKDIR /etc/dendrite
-
-ENTRYPOINT ["/usr/bin/dendrite-polylith-multi"]
--- a/build/docker/README.md
+++ b/build/docker/README.md
@ -9,11 +9,16 @@ They can be found on Docker Hub:

 ## Dockerfiles

-The `Dockerfile` builds the base image which contains all of the Dendrite
-components. The `Dockerfile.component` file takes the given component, as
-specified with `--buildarg component=` from the base image and produce
-smaller component-specific images, which are substantially smaller and do
-not contain the Go toolchain etc.
+The `Dockerfile` is a multistage file which can build all four Dendrite
+images depending on the supplied `--target`. From the root of the Dendrite
+repository, run:
+
+```
+docker build . --target monolith -t matrixdotorg/dendrite-monolith
+docker build . --target polylith -t matrixdotorg/dendrite-monolith
+docker build . --target demo-pinecone -t matrixdotorg/dendrite-demo-pinecone
+docker build . --target demo-yggdrasil -t matrixdotorg/dendrite-demo-yggdrasil
+```

 ## Compose files

--- a/build/docker/images-build.sh
+++ b/build/docker/images-build.sh
@ -6,5 +6,7 @@ TAG=${1:-latest}

 echo "Building tag '${TAG}'"

-docker build -t matrixdotorg/dendrite-monolith:${TAG}  -f build/docker/Dockerfile.monolith .
-docker build -t matrixdotorg/dendrite-polylith:${TAG}  -f build/docker/Dockerfile.polylith .
+docker build . --target monolith -t matrixdotorg/dendrite-monolith:${TAG}
+docker build . --target polylith -t matrixdotorg/dendrite-monolith:${TAG}
+docker build . --target demo-pinecone -t matrixdotorg/dendrite-demo-pinecone:${TAG}
+docker build . --target demo-yggdrasil -t matrixdotorg/dendrite-demo-yggdrasil:${TAG}