Prometheus : Set Alert Notification (Email)2023/07/11 |
This is the Alert Notification Settings on Prometheus.
There are many way to receive Alerts like Slack, HipChat, WeChat and others, though, on this example, Configure Alerting with Email Receiver.
For more details of Alerting, Refer to the official documents.
⇒ https://prometheus.io/docs/alerting/configuration/ |
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[1] |
For Email notification, it needs SMTP Server.
On this example, it based on the environment that SMTP Server is running on localhost. |
[2] | Install Alertmanager on Prometheus Server Host. |
root@dlp:~# apt -y install prometheus-alertmanager |
[3] | Configure Prometheus Alert Settings with Email notification. |
root@dlp:~#
mv /etc/prometheus/alertmanager.yml /etc/prometheus/alertmanager.yml.org root@dlp:~# vi /etc/prometheus/alertmanager.yml # create new global: # SMTP server to use smtp_smarthost: 'localhost:25' # require TLS or not smtp_require_tls: false # notification sender's Email address smtp_from: 'Alertmanager <root@dlp.srv.world>' # if set SMTP Auth on SMTP server, set below, too # smtp_auth_username: 'alertmanager' # smtp_auth_password: 'password' route: # Receiver name for notification receiver: 'email-notice' # grouping definition group_by: ['alertname', 'Service', 'Stage', 'Role'] group_wait: 30s group_interval: 5m repeat_interval: 4h receivers: # any name of Receiver - name: 'email-notice' email_configs: # destination Email address - to: "root@localhost" # create new # for example, monitor node-exporter's [Up/Down] groups: - name: Instances rules: - alert: InstanceDown expr: up == 0 for: 5m labels: severity: critical annotations: description: '{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes.' summary: 'Instance {{ $labels.instance }} down'
root@dlp:~#
vi /etc/prometheus/prometheus.yml # line 17 : confirm - (Alertmanager Host):(Port) alerting: alertmanagers: - static_configs: - targets: ['localhost:9093'] # line 23 : add alert rules created above rule_files: # - "first_rules.yml" # - "second_rules.yml" - "alert_rules.yml"root@dlp:~# systemctl restart prometheus prometheus-alertmanager root@dlp:~# systemctl enable prometheus-alertmanager |
[4] | If [node-exporter] is down, following Email is sent. (mail body is HTML) |
root@dlp:~# mail ? 1 Return-Path: <root@dlp.srv.world> X-Original-To: root@localhost Delivered-To: root@localhost Received: from localhost (localhost [IPv6:::1]) by dlp.srv.world (Postfix) with UTF8SMTP id CAB68A08FF for <root@localhost>; Mon, 10 Jul 2023 23:14:37 -0500 (CDT) Subject: [FIRING:1] InstanceDown (node01.srv.world:9100 Hiroshima example critic al) To: root@localhost From: Alertmanager <root@dlp.srv.world> Message-Id: <1689048877830755260.9065214416407498040@dlp.srv.world> Date: Mon, 10 Jul 2023 23:14:37 -0500 Content-Type: multipart/alternative; boundary=ea1db661a52a2fc51c58be1772603c350 db11b35a8200af2fa337f49c289 MIME-Version: 1.0 --ea1db661a52a2fc51c58be1772603c350db11b35a8200af2fa337f49c289 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=UTF-8 ..... ..... |
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