Create local development Dockerfile and docker-compose (ethereum#17)

Adding docker-compose.dev.yml and Dockerfile.dev to mount the current dir and call a script to conditionally build for fast iteration

Dockerfile.dev

@@ -0,0 +1,12 @@
+# Requires the root repo dir to be mounted at /mnt/go-ethereum in order to run this!
+FROM golang:1.14-alpine
+
+RUN apk add --no-cache make gcc musl-dev linux-headers git
+RUN apk add --no-cache ca-certificates
+
+EXPOSE 8545 8546 8547 30303 30303/udp
+
+# Used to mount the code so image isn't re-built every time code changes
+WORKDIR /mnt/go-ethereum
+
+ENTRYPOINT ["sh", "./docker/dev_entrypoint.sh"]

docker-compose.dev.yml

@@ -0,0 +1,24 @@
+version: "3"
+
+services:
+  geth_l2:
+    build:
+      context: .
+      dockerfile: Dockerfile.dev
+    volumes:
+      - l2-node-data:/mnt/l2-node/l2:rw
+      - ./:/mnt/go-ethereum/
+
+    environment:
+      - REBUILD=                       # Set this if you want to rebuild on startup, leave unset otherwise
+      - CLEAR_DATA_KEY
+      - TARGET_GAS_LIMIT
+      - VOLUME_PATH=/mnt/l2-node/l2
+      - HOSTNAME=geth_l2
+      - PORT=8545
+      - NETWORK_ID=108
+    ports:
+      - 8545:8545
+
+volumes:
+  l2-node-data:

docker/dev_entrypoint.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# Exits if any command fails
+set -e
+
+if [ -n "$REBUILD" ]; then
+  echo -e "\n\nREBUILD env var set, rebuilding...\n\n"
+
+  make geth
+  echo -e "\n\nCode built proceeding with ./entrypoint.sh...\n\n"
+else
+  echo -e "\n\nREBUILD env var not set, calling ./entrypoint.sh without building...\n\n"
+fi
+
+echo "Starting Geth..."
+## Command to kick off geth
+TARGET_GAS_LIMIT=${TARGET_GAS_LIMIT:-4294967295}
+./build/bin/geth --dev \
+  --datadir $VOLUME_PATH \
+  --rpc \
+  --rpcaddr $HOSTNAME \
+  --rpcvhosts='*' \
+  --rpcport $PORT \
+  --networkid $NETWORK_ID \
+  --rpcapi 'eth,net' \
+  --gasprice '0' \
+  --targetgaslimit $TARGET_GAS_LIMIT \
+  --nousb \
+  --gcmode=archive \
+  --verbosity "6"

docker/entrypoint.sh

@@ -18,4 +18,16 @@ fi
 
 echo "Starting Geth..."
 ## Command to kick off geth
-geth --dev --datadir $VOLUME_PATH --rpc --rpcaddr $HOSTNAME --rpcvhosts=* --rpcport $PORT --networkid $NETWORK_ID --rpcapi 'eth,net' --gasprice '0' --targetgaslimit $TARGET_GAS_LIMIT --nousb --gcmode=archive --verbosity "6"
+geth --dev \
+  --datadir $VOLUME_PATH \
+  --rpc \
+  --rpcaddr $HOSTNAME \
+  --rpcvhosts='*' \
+  --rpcport $PORT \
+  --networkid $NETWORK_ID \
+  --rpcapi 'eth,net' \
+  --gasprice '0' \
+  --targetgaslimit $TARGET_GAS_LIMIT \
+  --nousb \
+  --gcmode=archive \
+  --verbosity "6"