You have moved to Alpine linux quite some time ago (pires/docker-jre@00104da), since that moment kubernetes elasticsearch doesn't work. The reason is simple - alpine doesn't support search parameter in resolve.conf.
The plugin for kubernetes node discovery has kubernetes.default.svc as desitnation name, but kubernetes DNS doesn't have this address completely, but domain name search instead... so as a result - this builds are useless since that commit.
I see 2 options:

1. change name in plugin to kubernetes.default.svc.cluster.local
2. move to debian or any other base image with normal glibc.