diff --git a/contrib/logging/fluentd-es-image/run.sh b/contrib/logging/fluentd-es-image/run.sh
index 4b8e4e8f5e8..17e680afa41 100755
--- a/contrib/logging/fluentd-es-image/run.sh
+++ b/contrib/logging/fluentd-es-image/run.sh
@@ -14,7 +14,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# WARNING! HORRIBLE HACK! We expect /outerhost to be mapped to
+# the enclosing /etc/host file so we can determine the name of
+# the host machine (super fragile). This is a temporary hack until
+# service IPs are done.
 OUTER_HOST=`tail -n 1 /outerhost | awk '{print $3}'`
+
+# Copy the Fluentd config file and patch it to refer to the
+# name of the host machine for ES_HOST. HACK!
 cp td-agent.conf /etc/td-agent
 sed -i -e "s/ES_HOST/${OUTER_HOST}/" /etc/td-agent/td-agent.conf
 /usr/sbin/td-agent