cluster health info page

Fixes: https://pagure.io/koji/issue/1550

www/kojiweb/clusterhealth.chtml

@@ -0,0 +1,82 @@
+#from kojiweb import util
+
+#def printOption(value, label=None)
+#if not $label
+#set $label = $value
+#end if
+<option value="$value"#if $value == $arch then ' selected="selected"' else ''#>$label</option>
+#end def
+
+#include "includes/header.chtml"
+<style>
+  span {
+    display: inline-block;
+    box-sizing: border-box;
+    height: 100%;
+    float: left;
+    padding: 0px;
+    text-overflow: ellipsis;
+  }
+  .graph {
+      height: 15px;
+  }
+
+  .free {
+    background: #00ff00;
+                text-align: right;
+  }
+
+  .busy {
+    background: #ff0000;
+  }
+
+  .count {
+    background: #0000ff;
+    color: #ffffff;
+  }
+</style>
+
+  <h4>Cluster health</h4>
+  <table class="data-list">
+    <tr style="text-align: left">
+      <td colspan="3">
+        <form action="">
+          Architecture:
+          <select onchange="javascript: window.location = 'clusterhealth?arch=' + this.value + '$util.passthrough($self, 'order')';">
+            $printOption('__all__', 'all')
+            #for $arch in $arches
+            $printOption($arch)
+            #end for
+          </select>
+        </form>
+      </td>
+    </tr>
+    <tr class="list-header">
+      <th>Channel</th>
+      <th>Load/Capacity</th>
+      <th>Builder readiness</th>
+    </tr>
+    #for $channel in $channels
+    <tr>
+      <th>
+          <a href="channelinfo?channelID=$channel['id']">$channel['name']</a>
+      </th>
+      <td width="$graphWidth" class="graph">
+        #if $channel['capacityPerc']
+        <span style="width: $channel['capacityPerc']%">
+          <span style="width: #echo $channel['perc_load']#%" class="busy" title="Load: #echo int($channel['load'])#"></span>
+          <span style="width: #echo 100 - $channel['perc_load']#%" class="free" title="Free capacity: #echo int($channel['capacity'] - $channel['load'])#">#echo int(100 - $channel['perc_load'])#%&nbsp;</span>
+        </span>
+        #end if
+      </td>
+      <td width="$graphWidth" class="graph">
+        <span style="width: #echo $channel['enabledPerc']#%">
+          <span style="width: #echo 100 - $channel['perc_ready']#%" class="busy" title="Busy builders: #echo $channel['enabled'] - $channel['ready']#"></span>
+          <span style="width: #echo $channel['perc_ready']#%" class="free" title="Ready builders: $channel['ready']"">#echo int($channel['ready'])#&nbsp;</span>
+        </span>
+      </td>
+    </tr>
+    #end for
+  </table>
+
+#include "includes/footer.chtml"

www/kojiweb/index.py

@@ -2135,6 +2135,62 @@ def buildsbytarget(environ, days='7', start=None, order='-builds'):
 
     return _genHTML(environ, 'buildsbytarget.chtml')
 
+def _filter_hosts_by_arch(hosts, arch):
+    if arch == '__all__':
+        return hosts
+    else:
+        return [h for h in hosts if arch in h['arches'].split()]
+
+def clusterhealth(environ, arch='__all__'):
+    values = _initValues(environ, 'Cluster health', 'reports')
+    server = _getServer(environ)
+    channels = server.listChannels()
+    server.multicall = True
+    for channel in channels:
+        server.listHosts(channelID=channel['id'])
+    max_enabled = 0
+    max_capacity = 0
+    arches = set()
+    for channel, [hosts] in zip(channels, server.multiCall()):
+        for host in hosts:
+            arches |= set(host['arches'].split())
+        hosts = _filter_hosts_by_arch(hosts, arch)
+        channel['enabled'] = len([x for x in hosts if x['enabled']])
+        channel['disabled'] = len(hosts) - channel['enabled']
+        channel['ready'] = len([x for x in hosts if x['ready']])
+        channel['capacity'] = sum([x['capacity'] for x in hosts])
+        channel['load'] = sum([x['task_load'] for x in hosts])
+        if max_enabled < channel['enabled']:
+            max_enabled = channel['enabled']
+        if max_capacity < channel['capacity']:
+            max_capacity = channel['capacity']
+
+    graphWidth = 400.0
+    # compute values for channels
+    for channel in channels:
+        try:
+            channel['capacityPerc'] = channel['capacity'] / max_capacity * 100
+        except ZeroDivisionError:
+            channel['capacityPerc'] = 0
+        try:
+            channel['enabledPerc'] = channel['enabled'] / max_enabled * 100
+        except ZeroDivisionError:
+            channel['enabledPerc'] = 0
+        if channel['capacity']:
+            channel['perc_load'] = min(100, channel['load'] / channel['capacity'] * 100)
+        else:
+            channel['perc_load'] = 0.0
+        if channel['enabled']:
+            channel['perc_ready'] = min(100, channel['ready'] / channel['enabled'] * 100)
+        else:
+            channel['perc_ready'] = 0.0
+
+    values['arch'] = arch
+    values['arches'] = sorted(arches)
+    values['graphWidth'] = graphWidth
+    values['channels'] = sorted(channels, key=lambda x: x['name'])
+    return _genHTML(environ, 'clusterhealth.chtml')
+
 def recentbuilds(environ, user=None, tag=None, package=None):
     values = _initValues(environ, 'Recent Build RSS')
     server = _getServer(environ)

www/kojiweb/reports.chtml

@@ -12,6 +12,7 @@
     <li><a href="tasksbyhost">Tasks completed by each host</a></li>
     <li><a href="buildsbystatus">Succeeded/failed/canceled builds</a></li>
     <li><a href="buildsbytarget">Number of builds in each target</a></li>
+    <li><a href="clusterhealth">Cluster health</a></li>
   </ul>
 
 #include "includes/footer.chtml"