The base image (registry.access.redhat.com/ubi8-minimal) is about 100 MiB.
ID CREATED CREATED BY SIZE COMMENT
a6bd0f949af01b5680767225c3ac2b428d9b6921a6a9a420f6189f2523931c4c 18 hours ago ENTRYPOINT ["/opt/keycloak/bin/kc.sh"] 0 B buildkit.dockerfile.v0
<missing> 18 hours ago EXPOSE map[8443/tcp:{}] 0 B buildkit.dockerfile.v0
<missing> 18 hours ago EXPOSE map[8080/tcp:{}] 0 B buildkit.dockerfile.v0
<missing> 18 hours ago USER 1000 0 B buildkit.dockerfile.v0
<missing> 18 hours ago RUN /bin/sh -c microdnf update -y && microdnf install -y java-11-openjdk-headless && microdnf clean all && rm -rf /var/cache/yum/* && echo "keycloak:x:0:root" >> /etc/group && echo "keycloak:x:1000:0:keycloak user:/opt/keycloak:/sbin/nologin" >> /etc/passwd # buildkit 272 MB buildkit.dockerfile.v0
<missing> 18 hours ago COPY /opt/keycloak /opt/keycloak # buildkit 192 MB buildkit.dockerfile.v0
1ecf95eda522cf8db84ac321e43a353deea042480ed4e97e02c5290eb53390c3 5 days ago 20.5 kB
<missing> 5 days ago 107 MB Imported from -
>> 562MB
Curious, why is the Quay image/container so large? Is there a way to list the contents without downloading it?