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deploy(docker): Add prestart endpoint to docker-entrypoint #900

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Merged
tonyo merged 2 commits into from
Jan 8, 2021
Merged

deploy(docker): Add prestart endpoint to docker-entrypoint #900

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deploy(docker): Add prestart endpoint to docker-entrypoint
tonyo Jan 5, 2021
73b6e09
Parametrize better
tonyo Jan 5, 2021
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2 changes: 1 addition & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ RUN sentry-cli --version \
FROM debian:buster-slim

RUN apt-get update \
&& apt-get install -y ca-certificates gosu --no-install-recommends \
&& apt-get install -y ca-certificates gosu curl --no-install-recommends \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/*

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23 changes: 23 additions & 0 deletions docker-entrypoint.sh
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Expand Up @@ -16,6 +16,29 @@ if [[ -n "${RELAY_DELAY_STARTUP_SECONDS:-}" ]]; then
sleep "${RELAY_DELAY_STARTUP_SECONDS}"
fi

# Make sure that a specified URL (e.g. the upstream or a proxy sidecar) is reachable before starting.
# Only 200 response is accepted as success.
if [[ -n "${RELAY_PRESTART_ENDPOINT:-}" ]]; then
max_retry="${RELAY_PRESTART_MAX_RETRIES:-120}"
curl_timeout="${RELAY_PRESTART_REQUEST_TIMEOUT:-1}"
for attempt in $(seq 0 "${max_retry}"); do
if [[ "${attempt}" == "${max_retry}" ]]; then
echo "The prestart endpoint has not returned 200 after ${max_retry} attempts, exiting!"
exit 1
fi
status=$(curl --max-time "${curl_timeout}" --show-error --silent \
--output /dev/null --write-out "%{http_code}" \
-H 'Connection: close' \
"${RELAY_PRESTART_ENDPOINT}" \
|| true)
if [[ "${status}" == "200" ]]; then
break
fi
echo "Waiting for a 200 response from ${RELAY_PRESTART_ENDPOINT}, got ${status}"
sleep 1
done
fi

# For compatibility with older images
if [ "$1" == "bash" ]; then
set -- bash "${@:2}"
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