feat: workflow to build docker image

.github/workflows/build-and-push-image.yml

@@ -0,0 +1,59 @@
+name: Build and Push Op-geth
+
+on:
+  push:
+    branches:
+      - optimism
+  workflow_dispatch:  # Allows manual triggering
+
+env:
+  REGISTRY: "registry.digitalocean.com/sigil"
+  DEPLOYMENT_NAME: op-geth
+  CONTAINER_NAME: op-geth
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build container image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: false
+          tags: ${{ env.REGISTRY }}/${{ env.CONTAINER_NAME }}:${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Install doctl
+        uses: digitalocean/action-doctl@v2
+        with:
+          token: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }}
+
+      - name: Log in to DO Container Registry
+        run: doctl registry login --expiry-seconds 1200
+
+      - name: Push image to DO Container Registry
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.CONTAINER_NAME }}:${{ github.sha }}
+            ${{ env.REGISTRY }}/${{ env.CONTAINER_NAME }}:latest
+
+      - name: Save DigitalOcean kubeconfig
+        run: doctl kubernetes cluster kubeconfig save ${{ secrets.CLUSTER_NAME }}
+
+      - name: Update deployment image
+        run: |
+          kubectl set image statefulset/${DEPLOYMENT_NAME} ${CONTAINER_NAME}=${REGISTRY}/${CONTAINER_NAME}:${GITHUB_SHA}
+
+      - name: Verify deployment
+        run: |
+          kubectl rollout status statefulset/${DEPLOYMENT_NAME}

.gitignore

@@ -46,6 +46,10 @@ profile.cov
 # VS Code
 .vscode
 
+# so accidents don't happen
+jwt.txt
+datadir/
+
 # dashboard
 /dashboard/assets/flow-typed
 /dashboard/assets/node_modules

Dockerfile

@@ -1,7 +1,6 @@
 # Support setting various labels on the final image
 ARG COMMIT=""
 ARG VERSION=""
-ARG BUILDNUM=""
 
 # Build Geth in a stock Go builder container
 FROM golang:1.23-alpine AS builder
@@ -13,6 +12,7 @@ COPY go.mod /go-ethereum/
 COPY go.sum /go-ethereum/
 RUN cd /go-ethereum && go mod download
 
+# copies all files (including genesis.json) to the builder stage
 ADD . /go-ethereum
 RUN cd /go-ethereum && go run build/ci.go install -static ./cmd/geth
 
@@ -22,12 +22,14 @@ FROM alpine:latest
 RUN apk add --no-cache ca-certificates
 COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
 
+# Copy genesis.json - this will fail if file doesn't exist
+COPY --from=builder /go-ethereum/genesis.json /usr/local/bin/genesis.json
+
 EXPOSE 8545 8546 30303 30303/udp
 ENTRYPOINT ["geth"]
 
 # Add some metadata labels to help programmatic image consumption
 ARG COMMIT=""
 ARG VERSION=""
-ARG BUILDNUM=""
 
-LABEL commit="$COMMIT" version="$VERSION" buildnum="$BUILDNUM"
+LABEL commit="$COMMIT" version="$VERSION" 

README.md

@@ -161,6 +161,22 @@ Do not forget `--http.addr 0.0.0.0`, if you want to access RPC from other contai
 and/or hosts. By default, `geth` binds to the local interface and RPC endpoints are not
 accessible from the outside.
 
+#### Docker image Building
+
+Images are built automatically through the github action, but can be manually generated with
+
+```bash
+ docker build \
+  --build-arg COMMIT=$(git rev-parse HEAD) \
+  --build-arg VERSION=$(git describe --tags --abbrev=0) \
+  -t op-geth:latest \
+  .
+```
+
+The `Dockerfile` requires a `genesis.json` in the project root.  `genesis.json`
+is generated in the rollup node, `op-node`.  Read more about it in the
+[op stack tutorial](https://docs.optimism.io/builders/chain-operators/tutorials/create-l2-rollup).
+
 ### Programmatically interfacing `geth` nodes
 
 As a developer, sooner rather than later you'll want to start interacting with `geth` and the