test: fix kokoro system-test by forcing ipv4 in tests (#242)

Author: aabmass

system-test/Dockerfile.linux

@@ -15,6 +15,8 @@ RUN apt-get update && apt-get install -y curl $ADDITIONAL_PACKAGES \
     && rm -rf /var/lib/apt/lists/*
 
 ENV NVM_DIR /bin/.nvm
+# Force ipv4 results first b/275122541
+ENV NODE_OPTIONS="--dns-result-order=ipv4first"
 RUN mkdir -p $NVM_DIR
 
 

system-test/Dockerfile.node-alpine

@@ -8,6 +8,8 @@ RUN go get github.com/google/pprof
 FROM node:${NODE_VERSION}-alpine
 
 ARG ADDITIONAL_PACKAGES
+# Force ipv4 results first b/275122541
+ENV NODE_OPTIONS="--dns-result-order=ipv4first"
 
 RUN apk add --no-cache bash $ADDITIONAL_PACKAGES
 WORKDIR /root/