Add ELK stack example to UCP logging

ucp/configuration/configure-logs.md

@@ -22,6 +22,42 @@ You can configure UCP for sending logs to a remote logging service:
 
 ![](../images/settings-log.png)
 
+## Example: Setting up an ELK stack
+
+One popular logging stack is composed of Elasticsearch, Logstash and
+Kibana. The following example demonstrates how to set up an example
+deployment which can be used for logging.
+
+```none
+docker volume create --name orca-elasticsearch-data
+
+docker run -d \
+    --name elasticsearch \
+    -v orca-elasticsearch-data:/usr/share/elasticsearch/data \
+    elasticsearch elasticsearch -Des.network.host=0.0.0.0
+
+docker run -d \
+    -p 514:514 \
+    --name logstash \
+    --link elasticsearch:es \
+    logstash \
+    sh -c "logstash -e 'input { syslog { } } output { stdout { } elasticsearch { hosts => [ \"es\" ] } } filter { json { source => \"message\" } }'"
+
+docker run -d \
+    --name kibana \
+    --link elasticsearch:elasticsearch \
+    -p 5601:5601 \
+    kibana
+```
+
+Once you have these containers running, configure UCP to send logs to
+the IP of the Logstash container. You can then browse to port 5601 on the system
+running Kibana and browse log/event entries. You should specify the "time"
+field for indexing.
+
+When deployed in a production environment, you should secure your ELK
+stack. UCP does not do this itself, but there are a number of 3rd party
+options that can accomplish this (e.g. Shield plug-in for Kibana)
 
 ## Where to go next