--- a/roles/nginx/files/etc/munin/plugins/nginx_requests_by_vhost	Tue Jan 02 17:58:25 2018 +0800
+++ b/roles/nginx/files/etc/munin/plugins/nginx_requests_by_vhost	Tue Jan 02 17:58:55 2018 +0800
@@ -9,24 +9,30 @@
         ;;
 
     config)
-        echo "graph_title Nginx requests by vhost"
-        echo 'graph_args --base 1000'
-        echo 'graph_vlabel requests / ${graph_period}'
-        echo 'graph_category nginx'
+        for kind in access error; do
+            echo "multigraph nginx_${kind}_by_vhost"
+            echo "graph_title Nginx requests by vhost (${kind})"
+            echo 'graph_args --base 1000'
+            echo 'graph_vlabel requests / ${graph_period}'
+            echo 'graph_category nginx'
 
-        for vhost in $vhosts; do
-            name="$(clean_fieldname "$vhost")"
-            echo "${name}.label ${vhost}"
-            echo "${name}.type DERIVE"
-            echo "${name}.draw LINE1"
-            echo "${name}.min 0"
+            for vhost in $vhosts; do
+                name="$(clean_fieldname "$vhost")"
+                echo "${name}.label ${vhost}"
+                echo "${name}.type DERIVE"
+                echo "${name}.draw LINE1"
+                echo "${name}.min 0"
+            done
         done
 
         exit 0
         ;;
 esac
 
-for vhost in $vhosts; do
-    name="$(clean_fieldname "$vhost")"
-    echo "${name}.value $(wc -l /var/log/nginx/${vhost}.access.log | cut -d' ' -f1)"
+for kind in access error; do
+    echo "multigraph nginx_${kind}_by_vhost"
+    for vhost in $vhosts; do
+        name="$(clean_fieldname "$vhost")"
+        echo "${name}.value $(wc -l "/var/log/nginx/${vhost}.${kind}.log" | cut -d' ' -f1)"
+    done
 done