Keep symlink, remove customizations for volumes/configsets

Dockerfile

@@ -90,36 +90,13 @@ RUN set -ex; \
     \
     apk add --no-cache \
         bash \
-        curl \
-        grep \
         make \
         procps-ng \
         sudo; \
     \
-    # 8.x version has a symlink and wrong permissions.
-    if [[ -d "/opt/solr-${SOLR_VER}" ]]; then \
-        rm -rf /opt/solr; \
-        mv "/opt/solr-${SOLR_VER}" /opt/solr; \
-        chown -R solr:solr /opt/solr /etc/default/; \
-        cd /opt/solr; \
-    fi; \
-    echo "chown solr:solr /opt/solr/server/solr" > /usr/local/bin/init_volumes; \
-    chmod +x /usr/local/bin/init_volumes; \
-    echo 'solr ALL=(root) NOPASSWD:SETENV: /usr/local/bin/init_volumes' > /etc/sudoers.d/solr; \
+    chown -R solr:solr /etc/default/; \
     \
-    mkdir -p /opt/docker-solr/configsets; \
-    # Move out from volume to always keep them inside of the image.
-    mv /opt/solr/server/solr/configsets/* /opt/docker-solr/configsets/; \
-    mv /opt/solr/server/solr/solr.xml /opt/docker-solr/solr.xml; \
-    if [[ -d /tmp/configsets/"${SOLR_VER:0:1}"/ ]]; then \
-        cp -R /tmp/configsets/"${SOLR_VER:0:1}"/* /opt/docker-solr/configsets/; \
-    fi; \
-    chown -R solr:solr /opt/docker-solr/configsets; \
-    \
-    rm -rf \
-        /tmp/configsets \
-        /opt/solr/server/solr/mycores \
-        /var/cache/apk/*
+    rm -rf /var/cache/apk/*
 
 COPY bin /usr/local/bin
 COPY entrypoint.sh /

entrypoint.sh

@@ -6,23 +6,9 @@ if [[ -n "${DEBUG}" ]]; then
     set -x
 fi
 
-sudo init_volumes
-
-mkdir -p /opt/solr/server/solr/configsets
-
 migrate
 
-if [[ ! -f /opt/solr/server/solr/solr.xml ]]; then
-    ln -s /opt/docker-solr/solr.xml /opt/solr/server/solr/solr.xml
-fi
-
-if [[ -f /opt/solr/bin/solr.in.sh ]]; then
-    conf_file=/opt/solr/bin/solr.in.sh
-else
-    conf_file=/etc/default/solr.in.sh
-fi
-
-sed -E -i 's@^#SOLR_HEAP=".*"@'"SOLR_HEAP=${SOLR_HEAP}"'@' "${conf_file}"
+sed -E -i 's@^#SOLR_HEAP=".*"@'"SOLR_HEAP=${SOLR_HEAP}"'@' /etc/default/solr.in.sh
 
 if [[ "${1}" == 'make' ]]; then
     exec "$@" -f /usr/local/bin/actions.mk