default.tmpl

[va-bis]

Hi, I connected the template file to my alertmanager config, when I start alertmanager, I get the error: err="failed to parse templates: template: default.tmpl:10: function "duration" not defined", what needs to be fixed to add in the config, help me please

default.tmpl

{{ define "telegram.default" }}
  {{ range .Alerts }}
  {{ if eq .Status "firing"}}fire {{ .Labels.alertname }} fire{{ else }}white_check_mark {{ .Labels.alertname }} white_check_mark{{ end }}
  Labels:{{ range $key, $value := .Labels }}{{ if ne $key "alertname" }}
  {{ $key }}: {{ $value }}{{ end }}{{ end }}
  Annotations:{{ range $key, $value := .Annotations }}
  {{ $key }}: {{ $value }}{{ end }}{{ if eq .Status "firing"}}
  Duration: {{ since .StartsAt }}{{ else }}
  Duration: {{ duration .StartsAt .EndsAt }}
  Ended: {{ .EndsAt | since }}{{ end }}
  {{ end }}
  {{ end }}

alertmanager.yml

global:
 resolve_timeout: 5m
route:
 group_by: ['instance', 'alertname', 'service']
 group_wait: 30s
 group_interval: 5m
 repeat_interval: 3h
 receiver: 'alertmananger-bot'
receivers:
 - name: 'alertmananger-bot'
   webhook_configs:
   - send_resolved: true
     url: 'http://alertmananger-bot:8080'
inhibit_rules:
- source_match:
   severity: 'critical'
 target_match:
   severity: 'warning'
 equal: ['instance', 'alertname']
templates:
 - /etc/alertmanager/default.tmpl

docker-compose.yml

alertmanager-bot:
  volumes:
  - ./data:/data
  command:
  - --alertmanager.url=http://alertmanager:9093
  - --log.level=info
  - --store=bolt
  - --bolt.path=/data/bot.db
  environment:
  TELEGRAM_ADMIN: "xxxxxxxxx"
  TELEGRAM_TOKEN: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  image: metalmatze/alertmanager-bot:0.4.3
  container_name: alertmanager-bot
  networks:
  - networks
  ports:
  - 8080:8080
  restart: unless-stopped

[va-bis]

Answered
The response was received, this is configured in alertmanager-bot