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Add readiness check for docker container #9804

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Oct 26, 2018
Merged

Add readiness check for docker container #9804

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1958596
Update Dockerfile
beetahnator Oct 23, 2018
cfa33a0
add sync check script
beetahnator Oct 24, 2018
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4 changes: 3 additions & 1 deletion scripts/docker/hub/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ ARG TARGET
ENV TARGET ${TARGET}

# install tools and dependencies
RUN apt update && apt install -y --no-install-recommends openssl libudev-dev file
RUN apt update && apt install -y --no-install-recommends openssl libudev-dev file curl jq

# show backtraces
ENV RUST_BACKTRACE 1
Expand All @@ -31,6 +31,8 @@ COPY artifacts/x86_64-unknown-linux-gnu/$TARGET ./bin/$TARGET
RUN echo "#!/bin/bash \n ${TARGET} \$@" > ./entrypoint.sh
RUN chmod +x ./entrypoint.sh

ADD check_sync.sh /check_sync.sh
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missing a leading dot here ./check_sync.sh

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The script should still be executable and I would prefer to invoke it from /check_sync.sh rather than /home/parity/check_sync.sh

Either works though, the latter is just more cumbersome.


# setup ENTRYPOINT
EXPOSE 5001 8080 8082 8083 8545 8546 8180 30303/tcp 30303/udp
ENTRYPOINT ["./entrypoint.sh"]
13 changes: 13 additions & 0 deletions scripts/docker/hub/check_sync.sh
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@@ -0,0 +1,13 @@
#!/bin/bash
# checks if parity has a fully synced blockchain

ETH_SYNCING=$(curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8545 -H 'Content-Type: application/json')
RESULT=$(echo "$ETH_SYNCING" | jq -r .result)

if [ "$RESULT" == "false" ]; then
echo "Parity is ready to start accepting traffic"
exit 0
else
echo "Parity is still syncing the blockchain"
exit 1
fi