Merge pull request #37 from vulcanize/feature-docker-overlay

Update docker environment to support fs overlay

Dockerfile

@@ -6,6 +6,8 @@ RUN apk add busybox-extras
 
 # Get and build ipfs-blockchain-watcher
 ADD . /go/src/github.com/vulcanize/eth-statediff-service
+#RUN git clone https://github.com/vulcanize/eth-statediff-service.git /go/src/github.com/vulcanize/eth-statediff-service
+
 WORKDIR /go/src/github.com/vulcanize/eth-statediff-service
 RUN GO111MODULE=on GCO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o eth-statediff-service .
 
@@ -15,7 +17,10 @@ FROM alpine
 ARG USER="vdm"
 ARG CONFIG_FILE="./environments/example.toml"
 ARG EXPOSE_PORT=8545
-RUN adduser -Du 5000 $USER
+
+RUN adduser -Du 5000 $USER adm
+RUN adduser $USER adm; apk --no-cache add sudo; echo '%adm ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+
 WORKDIR /app
 RUN chown $USER /app
 USER $USER

startup_script.sh

@@ -4,8 +4,17 @@ set -e
 set +x
 
 # Check the database variables are set
-test $VDB_COMMAND
+test "$VDB_COMMAND"
 set +e
 
-echo "Running the statediff service"
-./eth-statediff-service ${VDB_COMMAND} --config=config.toml
+# docker must be run in privilaged mode for mounts to work
+echo "Setting up /app/geth-rw overlayed /app/geth-ro"
+mkdir -p /tmp/overlay && \
+sudo mount -t tmpfs tmpfs /tmp/overlay && \
+mkdir -p /tmp/overlay/upper && \
+mkdir -p /tmp/overlay/work && \
+mkdir -p /app/geth-rw && \
+sudo mount -t overlay overlay -o lowerdir=/app/geth-ro,upperdir=/tmp/overlay/upper,workdir=/tmp/overlay/work /app/geth-rw && \
+
+echo "Running the statediff service" && \
+sudo ./eth-statediff-service "$VDB_COMMAND" --config=config.toml