starred/nix-config
1
0
Fork 0
mirror of https://github.com/ryan4yin/nix-config.git synced 2026-08-06 19:58:33 +02:00
Code Issues Packages Projects Releases 10 Wiki Activity

fix(monitoring): drop $vars from telegram template to survive envsubst

Browse Source 
The NixOS alertmanager module pipes the generated config through
envsubst to inject secrets, which silently replaced the template's
$i/$a variables with empty strings, so every telegram notification
failed with a template parse error since Friday's deploy.

Rewrite the template without variables: range + dot, define/template
for the per-alert block, and an if/else split to cap a group at 5
alerts (slice errors when fewer than 5). Verified with amtool template
render against post-envsubst content for both branches.

Signed-off-by: Ryan Yin <xiaoyin_c@qq.com>
This commit is contained in:
Ryan Yin
2026-07-26 15:16:46 +08:00
parent 8bb2adc436
commit 21c6d9b7bc
1 changed files with 16 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hosts/idols-aquamarine/monitoring/alert.nix
+16 -6
View File
@@ -126,6 +126,13 @@
# Message template
# Telegram limits a message to 4096 chars, so only render the first 5 alerts
# in a group and keep the fields minimal (no full label dump).
#
# WARNING: never use template variables ($i, $a, ...) here. The NixOS
# alertmanager module pipes the generated config through `envsubst`
# (to inject $TELEGRAM_BOT_TOKEN etc.), which silently replaces any
# $var in this template with an empty string and breaks rendering at
# notify time. Use `{{ range .Alerts }}` + dot, and `define`/`template`
# for reuse instead.
message = ''
{{- if eq .Status "firing" }}
🟡 <b>告警触发</b> [{{ .CommonLabels.severity | title }}] <b>{{ .CommonLabels.alertname }}</b> (共 {{ len .Alerts }} 条)
@@ -137,18 +144,21 @@
• <b>Cluster</b>: {{ with .CommonLabels.cluster }}{{ . }}{{ else }}N/A{{ end }}
• <b>Env</b>: {{ with .CommonLabels.env }}{{ . }}{{ else }}N/A{{ end }}
• <b>Namespace</b>: {{ with .CommonLabels.namespace }}{{ . }}{{ else }}N/A{{ end }}
{{- range $i, $a := .Alerts }}
{{- if lt $i 5 }}
{{- define "alert" }}
━━━━━━━━
📌 {{ with $a.Annotations.summary }}<b>{{ . }}</b>{{ else }}<b>{{ $a.Labels.instance }}</b>{{ end }}
{{- with $a.Labels.nodename }}
📌 {{ with .Annotations.summary }}<b>{{ . }}</b>{{ else }}<b>{{ .Labels.instance }}</b>{{ end }}
{{- with .Labels.nodename }}
🏠 {{ . }}
{{- end }}
🔗 <a href="{{ $a.GeneratorURL }}">Grafana Explore</a> · ⏱ {{ $a.StartsAt.Format "2006-01-02 15:04:05" }}
🔗 <a href="{{ .GeneratorURL }}">Grafana Explore</a> · ⏱ {{ .StartsAt.Format "2006-01-02 15:04:05" }}
{{- end }}
{{- if le (len .Alerts) 5 }}
{{- range .Alerts }}{{ template "alert" . }}
{{- end }}
{{- else }}
{{- range slice .Alerts 0 5 }}{{ template "alert" . }}
{{- end }}
{{- if gt (len .Alerts) 5 }}
⚠️ 另有 {{ len (slice .Alerts 5) }} 条同组告警未列出，请查看 Alertmanager。
{{- end }}