overview: add color to load averages

The load average number turns:

* orange
When the load is higher than the number of cpu cores.

* red
When the load is more than twice as high as the number of cpu cores.

2 files changed, 22 insertions, 4 deletions

diff --git a/inc/html.inc.php b/inc/html.inc.php
index 0a33da5..015225e 100644
--- a/inc/html.inc.php
+++ b/inc/html.inc.php
@@ -173,6 +173,8 @@ function host_summary($cat, $hosts) {
         foreach($hosts as $host) {
                 $host_counter++;
 
+                $cores = count(group_plugindata(collectd_plugindata($host, 'cpu')));
+
                 printf('<tr class="%s">', $row_style[$host_counter % 2]);
                 printf('<th><a href="%shost.php?h=%s">%s</a></th>',
                         $CONFIG['weburl'],$host, $host);
@@ -189,10 +191,15 @@ function host_summary($cat, $hosts) {
                                 isset($rrd_info['ds[midterm].last_ds']) &&
                                 isset($rrd_info['ds[longterm].last_ds'])) {
 
-                                printf('<td>%.2f</td><td>%.2f</td><td>%.2f</td>',
-                                        $rrd_info['ds[shortterm].last_ds'],
-                                        $rrd_info['ds[midterm].last_ds'],
-                                        $rrd_info['ds[longterm].last_ds']);
+                                foreach (array('ds[shortterm].last_ds', 'ds[midterm].last_ds', 'ds[longterm].last_ds') as $info) {
+                                        $class = '';
+                                        if ($cores > 0 && $rrd_info[$info] > $cores * 2)
+                                                $class = ' class="crit"';
+                                        elseif ($cores > 0 && $rrd_info[$info] > $cores)
+                                                $class = ' class="warn"';
+
+                                        printf('<td%s>%.2f</td>', $class, $rrd_info[$info]);
+                                }
                         }
                 }
 
diff --git a/layout/style.css b/layout/style.css
index a828a8d..3d5c94b 100644
--- a/layout/style.css
+++ b/layout/style.css
@@ -138,3 +138,14 @@ legend {
         font-size: 1.4em;
         font-weight: normal;
 }
+
+.warn {
+        color: darkorange;
+        font-weight: normal;
+        text-shadow: 0 0 1px darkorange;
+}
+.crit {
+        color: red;
+        font-weight: normal;
+        text-shadow: 0 0 1px red;
+}