add solr init container...

to change passwords and create non-admin user

init_solr/Dockerfile

+ARG EXTERNAL_REG
+FROM ${EXTERNAL_REG}/bash:5.1.12
+
+ARG MAINTAINER
+LABEL maintainer="${MAINTAINER}" 
+
+RUN apk add --no-cache curl
+COPY init.sh /
+RUN chmod +x /init.sh
+ENTRYPOINT ["/init.sh"]
\ No newline at end of file

init_solr/init.sh

+#!/bin/sh
+
+abort () {
+    echo "$@" >&2
+    exit 1
+}
+
+if [ -f "/run/secrets/solr_creds" ]; then
+    echo "Found solr credentials secret, sourcing..."
+    . "/run/secrets/solr_creds"
+else
+    abort "ERROR: Solr credentials secret not found."
+fi
+
+echo "Sleeping 5 seconds."
+sleep 5;
+
+curl --user solr:SolrRocks \
+    http://solr:8983/solr/admin/authentication \
+    -H 'Content-type:application/json' \
+    -d '{"set-user": {"solr" : "'"${SOLR_ADMIN_PASS}"'" }}'
+
+curl --user "solr:${SOLR_ADMIN_PASS}" \
+    http://solr:8983/solr/admin/authentication \
+    -H 'Content-type:application/json' \
+    -d '{"set-user": {"ckan":"'"${SOLR_CKAN_PASS}"'"}}'
+
+curl --user "solr:${SOLR_ADMIN_PASS}" \
+    http://solr:8983/solr/admin/authorization \
+    -H 'Content-type:application/json' \
+    -d '{"set-user-role" : {"ckan": "basic"}}'