add jmx exporter

Author: Alexander-Cairns

Dockerfile

@@ -19,5 +19,10 @@ COPY --link --chown=${SOLR_UID}:${SOLR_GID} \
   security.json \
   /var/solr/data/security.json
 
+WORKDIR /jmx
+ADD --link --chmod=644 https://github.com/prometheus/jmx_exporter/releases/download/1.4.0/jmx_prometheus_javaagent-1.4.0.jar jmx_prometheus_javaagent.jar
+COPY --chmod=644 jmx.yml ./
+
+WORKDIR /opt/solr
 USER solr
 VOLUME ["${SOLR_CORE_DIR}/data"]

jmx.yml

@@ -0,0 +1,3 @@
+rules:
+- pattern: ".*"
+