(1) Install A lertmanager
Installed on k8s-node2 server
[root@k8s-node2 ~]# tar -zxvf alertmanager-0.21.0.linux-amd64.tar.gz
alertmanager-0.21.0.linux-amd64/
alertmanager-0.21.0.linux-amd64/alertmanager
alertmanager-0.21.0.linux-amd64/amtool
alertmanager-0.21.0.linux-amd64/NOTICE
alertmanager-0.21.0.linux-amd64/LICENSE
alertmanager-0.21.0.linux-amd64/alertmanager.yml
[root@k8s-node2 ~]# ls
alertmanager-0.21.0.linux-amd64 alertmanager-0.21.0.linux-amd64.tar.gz anaconda-ks.cfg disk_free.sh node_exporter-1.0.1.linux-amd64.tar.gz
[root@k8s-node2 ~]# cp alertmanager-0.21.0.linux-amd64/alertmanager /usr/local/bin/
[root@k8s-node2 ~]# cp alertmanager-0.21.0.linux-amd64/amtool /usr/local/bin/
[root@k8s-node2 ~]# alertmanager --version
(2) Configure Alertmanager
[root@k8s-node2 ~]# mkdir -pv /etc/alertmanager
mkdir: The directory "/etc/alertmanager" has been created
[root@k8s-node2 ~]# cp alertmanager-0.21.0.linux-amd64/alertmanager.yml /etc/alertmanager/
[root@k8s-node2 ~]# cat /etc/alertmanager/alertmanager.yml default configuration file
(3) Reconfigure Alertmanager
[root @ k8s-node2 alertmanager] # cp alertmanager.yml alertmanager.yml.bak
[root@k8s-node2 alertmanager]# ls
alertmanager.yml alertmanager.yml.bak
[root@k8s-node2 ~]# cat /etc/alertmanager/alertmanager.yml
[root@k8s-node2 alertmanager]# more alertmanager.yml
global:
smtp_smarthost: 'smtp.qq.com:25'
smtp_from: '[email protected]'
smtp_auth_username: '[email protected]'
smtp_auth_password: '******'
smtp_require_tls: false
route:
receiver: mail
receivers:
- name: 'mail'
email_configs:
- to: '[email protected]'
[root@k8s-node2 alertmanager]#
(4) Start Alertmanager
[root@k8s-node2 alertmanager]# alertmanager --config.file alertmanager.yml
(5) in the P rometheus adding the A lertmanage
# Alertmanager configuration
alerting:
alertmanagers:
- static_configs:
- targets:
- 192.168.20.43:9093
(6) In the P rometheus add the A lertmanage monitor
- job_name: 'alertmanager'
static_configs:
- targets: ['192.168.20.43:9093']
(7) Add alarm rules in P rometheus
groups:
- name: node-up
rules:
- alert: node-up
expr: up{job="k8s-node1"} == 0
for: 15s
labels:
severity: 1
team: node
annotations:
summary: "{{ $labels.instance }} has stopped running for more than 15s ! "
(8) Add the alarm rules to the P rometheus configuration file
rule_files:
- "rules/*_rules.yml"
- "rules/*_alerts.yml"
(9) View configuration rules
(10) Test: Stop the k8s-node1 node and see if there is an alarm
Prompt Pending(1)
(11) View the alarm Alertmanager
(12) Check email alarm
Prometheus+Grafana+Alertmanager + Email alert configuration completed
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Related Reading:
1. Deploy Prometheus in two ways
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