46: Make it possible to launch fixturenet with or without the statediff DB. (#59)

* 46: Make it possible to launch fixturenet with or without the statediff DB.

* Require the hostname as well.

compose/docker-compose-fixturenet-eth.yml

@@ -31,7 +31,7 @@ services:
   fixturenet-eth-geth-2:
     hostname: fixturenet-eth-geth-2
     environment:
-      CERC_RUN_STATEDIFF: "true"
+      CERC_RUN_STATEDIFF: "detect"
       CERC_STATEDIFF_DB_NODE_ID: 2
     healthcheck:
       test: ["CMD", "nc", "-v", "localhost", "8545"]
@@ -43,7 +43,6 @@ services:
       - ../config/fixturenet-eth/fixturenet-eth.env
     image: cerc/fixturenet-eth-geth:local
     depends_on:
-      - migrations
       - fixturenet-eth-bootnode-geth
 
   fixturenet-eth-bootnode-lighthouse:

config/fixturenet-eth/fixturenet-eth.env

@@ -17,3 +17,4 @@ CERC_STATEDIFF_DB_PORT=5432
 CERC_STATEDIFF_DB_NAME="cerc_testing"
 CERC_STATEDIFF_DB_USER="vdbm"
 CERC_STATEDIFF_DB_PASSWORD="password"
+CERC_STATEDIFF_DB_GOOSE_MIN_VER=23

container-build/cerc-fixturenet-eth-geth/Dockerfile

@@ -1,7 +1,7 @@
 FROM skylenet/ethereum-genesis-generator@sha256:210353ce7c898686bc5092f16c61220a76d357f51eff9c451e9ad1b9ad03d4d3 AS ethgen
 
 FROM cerc/go-ethereum:local
-RUN apk add --no-cache python3 python3-dev py3-pip curl wget jq build-base gettext libintl openssl bash
+RUN apk add --no-cache python3 python3-dev py3-pip curl wget jq build-base gettext libintl openssl bash bind-tools postgresql-client
 
 COPY --from=ethgen /usr/local/bin/eth2-testnet-genesis /usr/local/bin/eth2-testnet-genesis
 COPY --from=ethgen /usr/local/bin/eth2-val-tools /usr/local/bin/eth2-val-tools

container-build/cerc-fixturenet-eth-geth/run-el.sh

@@ -22,8 +22,33 @@ else
     
     echo -n "$JWT" > /opt/testnet/build/el/jwtsecret
 
+    if [ "$CERC_RUN_STATEDIFF" == "detect" ] && [ -n "$CERC_STATEDIFF_DB_HOST" ]; then
+      if [ -n "$(dig $CERC_STATEDIFF_DB_HOST +short)" ]; then
+        echo "Statediff DB at $CERC_STATEDIFF_DB_HOST"
+        CERC_RUN_STATEDIFF="true"
+      else
+        echo "No statediff DB available."
+        CERC_RUN_STATEDIFF="false"
+      fi
+    fi
+
     STATEDIFF_OPTS=""
     if [ "$CERC_RUN_STATEDIFF" == "true" ]; then
+      ready=0
+      while [ $ready -eq 0 ]; do
+        echo "Waiting for statediff DB..."
+        sleep 1
+        export PGPASSWORD="$CERC_STATEDIFF_DB_PASSWORD"
+        result=$(psql -h "$CERC_STATEDIFF_DB_HOST" \
+          -p "$CERC_STATEDIFF_DB_PORT" \
+          -U "$CERC_STATEDIFF_DB_USER" \
+          -d "$CERC_STATEDIFF_DB_NAME" \
+          -t -c 'select max(version_id) from goose_db_version;' 2>/dev/null | awk '{ print $1 }')
+        if [ -n "$result" ] && [ $result -ge $CERC_STATEDIFF_DB_GOOSE_MIN_VER ]; then
+          echo "DB ready..."
+          ready=1
+        fi
+      done
       STATEDIFF_OPTS="--statediff=true \
       --statediff.db.host=$CERC_STATEDIFF_DB_HOST \
       --statediff.db.name=$CERC_STATEDIFF_DB_NAME \