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prober: add a status page handler

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This change adds an HTTP handler with a table showing a list of all
probes, their status, and a button that allows triggering a specific
probe.

Updates tailscale/corp#20583

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This commit is contained in:
Anton Tolchanov
2024-07-30 23:10:04 +01:00
committed by Anton Tolchanov
parent 153a476957
commit 9b08399d9e
2 changed files with 256 additions and 0 deletions
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132
prober/status.html Normal file
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{{define "status"}}
<html>
<head><title>{{.Title}}</title></head>
<style>
body {
/* max-width: 60rem; */
margin-left: auto;
margin-right: auto;
padding: 3rem 1rem 8rem;
line-height: 1.4;
font-size: 1rem;
font-weight: 400;
font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
text-rendering: optimizeLegibility;
}
.small {
font-size: 0.7rem;
}
h1 {
font-weight: 500;
letter-spacing: -.025em;
}
a { color: rgb(74 125 221); }
a:hover { color: rgb(73 100 149); }
ul {
list-style: none;
margin: 0;
padding: 0;
}
ul>li::before {
position: absolute;
top: .625rem;
left: .125rem;
height: .375rem;
width: .375rem;
border-radius: 9999px;
background-color: currentColor;
opacity: .4;
content: "";
}
ul>li {
position: relative;
padding-left: 1.25rem;
}
th, td {
padding: 5px;
text-align: left;
background: #eeeeee;
}
.error {
color: red;
}
</style>
<body>
<h1>{{.Title}}</h1>
<ul>
<li>Prober Status:
{{if .UnhealthyProbes }}
<span class="error">{{.UnhealthyProbes}}</span>
out of {{.TotalProbes}} probes failed or never ran.
{{else}}
All {{.TotalProbes}} probes are healthy
{{end}}
</li>
{{ range $text, $url := .Links }}
<li><a href="{{$url}}">{{$text}}</a></li>
{{end}}
</ul>
<h1>Probes:</h1>
<table class="sortable">
<thead><tr>
<th>Name</th>
<th>Class & Labels</th>
<th>Interval</th>
<th>Result</th>
<th>Success</th>
<th>Latency</th>
<th>Error</th>
</tr></thead>
<tbody>
{{range $name, $probeInfo := .Probes}}
<tr>
<td>
{{$name}}
{{range $text, $url := $probeInfo.Links}}
<br/>
<button onclick="location.href='{{$url}}';" type="button">
{{$text}}
</button>
{{end}}
</td>
<td>{{$probeInfo.Class}}<br/>
<div class="small">
{{range $label, $value := $probeInfo.Labels}}
{{$label}}={{$value}}<br/>
{{end}}
</div>
</td>
<td>{{$probeInfo.Interval}}</td>
<td data-sort="{{$probeInfo.TimeSinceLast.Milliseconds}}">
{{if $probeInfo.TimeSinceLast}}
{{$probeInfo.TimeSinceLast.String}}<br/>
<span class="small">{{$probeInfo.End}}</span>
{{else}}
Never
{{end}}
</td>
<td>
{{if $probeInfo.Result}}
{{$probeInfo.Result}}
{{else}}
<span class="error">{{$probeInfo.Result}}</span>
{{end}}<br/>
<div class="small">Recent: {{$probeInfo.RecentResults}}</div>
<div class="small">Mean: {{$probeInfo.RecentSuccessRatio}}</div>
</td>
<td data-sort="{{$probeInfo.Latency.Milliseconds}}">
{{$probeInfo.Latency.String}}
<div class="small">Recent: {{$probeInfo.RecentLatencies}}</div>
<div class="small">Median: {{$probeInfo.RecentMedianLatency}}</div>
</td>
<td class="small">{{$probeInfo.Error}}</td>
</tr>
{{end}}
</tbody>
</table>
<link href="https://cdn.jsdelivr.net/gh/tofsjonas/sortable@latest/sortable-base.min.css" rel="stylesheet" />
<script src="https://cdn.jsdelivr.net/gh/tofsjonas/sortable@latest/sortable.min.js"></script>
</body>
</html>
{{end}}