standard config opt names: logging

cluster/rackspace/config-default.sh

@@ -40,3 +40,7 @@ PORTAL_NET="10.0.0.0/16"
 
 # Optional: Install node monitoring.
 ENABLE_NODE_MONITORING=true
+
+# Optional: Enable node logging.
+ENABLE_NODE_LOGGING=true
+LOGGING_DESTINATION=elasticsearch

cluster/rackspace/util.sh

@@ -185,6 +185,8 @@ rax-boot-minions() {
         -e "s|INDEX|$((i + 1))|g" \
         -e "s|CLOUD_FILES_URL|${RELEASE_TMP_URL//&/\&}|" \
         -e "s|ENABLE_NODE_MONITORING|${ENABLE_NODE_MONITORING:-false}|" \
+        -e "s|ENABLE_NODE_LOGGING|${ENABLE_NODE_LOGGING:-false}|" \
+        -e "s|LOGGING_DESTINATION|${LOGGING_DESTINATION:-}|" \
     $(dirname $0)/rackspace/cloud-config/minion-cloud-config.yaml > $KUBE_TEMP/minion-cloud-config-$(($i + 1)).yaml