Created
February 21, 2021 23:10
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Example of filtering RDS region-specific certificates, installed to an OpenJDK Docker image, to speed up image build time (eu-west-2)
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FROM openjdk:16-jdk-buster | |
LABEL org.opencontainers.image.source="https://github.com/KaleCharity/snip" | |
ARG jar | |
ADD $jar /service.jar | |
RUN curl -sS "https://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem" > rds-combined-ca-bundle.pem | |
RUN awk 'split_after == 1 {n++;split_after=0} /-----END CERTIFICATE-----/ {split_after=1}{print > "rds-ca-" n ".pem"}' < rds-combined-ca-bundle.pem | |
RUN for CERT in rds-ca-*; do \ | |
alias=$(openssl x509 -noout -text -in $CERT | perl -ne 'next unless /Subject:/; s/.*(CN=|CN = )//; print') && \ | |
if echo "$alias" | grep -v "eu-west-2\|RDS Root"; then continue; fi && \ | |
echo "Importing $alias" && \ | |
keytool -import -file ${CERT} -alias "${alias}" -storepass changeit -cacerts -noprompt && \ | |
rm $CERT; \ | |
done | |
CMD java $JAVA_OPTS -jar /service.jar $RUN_MODE |
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