run.sh

#!/bin/bash
set -euo pipefail
set -x
ulimit -n

if [ ! -z "$RLIMIT_NOFILE" ]; then
    echo "Setting RLIMIT_NOFILE to ${RLIMIT_NOFILE}"
    ulimit -Sn "$RLIMIT_NOFILE"
fi

export ERL_CRASH_DUMP=/tmp/erl_crash.dump

upload_crash_dump_to_s3() {
    EXIT_CODE=${?:-0}
    bucket=$ERL_CRASH_DUMP_S3_BUCKET
    s3Host=$ERL_CRASH_DUMP_S3_HOST
    s3Port=$ERL_CRASH_DUMP_S3_PORT

    if [ "${AWS_CONTAINER_CREDENTIALS_RELATIVE_URI-}" ]; then
        response=$(curl -s http://169.254.170.2$AWS_CONTAINER_CREDENTIALS_RELATIVE_URI)
        s3Key=$(echo "$response" | grep -o '"AccessKeyId": *"[^"]*"' | grep -o '"[^"]*"$' | tr -d '"')
        s3Secret=$(echo "$response" | grep -o '"SecretAccessKey": *"[^"]*"' | grep -o '"[^"]*"$' | tr -d '"')
    else
        s3Key=$ERL_CRASH_DUMP_S3_KEY
        s3Secret=$ERL_CRASH_DUMP_S3_SECRET
    fi

    filePath=${ERL_CRASH_DUMP_FOLDER:-tmp}/$(date +%s)_${ERL_CRASH_DUMP_FILE_NAME:-erl_crash.dump}

    if [ -f "${ERL_CRASH_DUMP_FOLDER:-tmp}/${ERL_CRASH_DUMP_FILE_NAME:-erl_crash.dump}" ]; then
        mv ${ERL_CRASH_DUMP_FOLDER:-tmp}/${ERL_CRASH_DUMP_FILE_NAME:-erl_crash.dump} $filePath

        resource="/${bucket}/realtime/crash_dumps${filePath}"

        contentType="application/octet-stream"
        dateValue=$(date -R)
        stringToSign="PUT\n\n${contentType}\n${dateValue}\n${resource}"

        signature=$(echo -en ${stringToSign} | openssl sha1 -hmac ${s3Secret} -binary | base64)

        if [ "${ERL_CRASH_DUMP_S3_SSL:-}" = true ]; then
            protocol="https"
        else
            protocol="http"
        fi

        curl -v -X PUT -T "${filePath}" \
            -H "Host: ${s3Host}" \
            -H "Date: ${dateValue}" \
            -H "Content-Type: ${contentType}" \
            -H "Authorization: AWS ${s3Key}:${signature}" \
            ${protocol}://${s3Host}:${s3Port}${resource}
    fi

    exit "$EXIT_CODE"
}

if [ "${ENABLE_ERL_CRASH_DUMP:-false}" = true ]; then
    trap upload_crash_dump_to_s3 INT TERM KILL EXIT
fi

echo "Running migrations"
sudo -E -u nobody /app/bin/migrate

if [ "${SEED_SELF_HOST-}" = true ]; then
    echo "Seeding selfhosted Realtime"
    sudo -E -u nobody /app/bin/realtime eval 'Realtime.Release.seeds(Realtime.Repo)'
fi

echo "Starting Realtime"
ulimit -n
exec "$@"