Install Prometheus Alert Manager
Video Lecture
Description
Install the Prometheus Alert Manager
sudo apt install prometheus-alertmanager
It has started a new service called prometheus-alertmanager
sudo service prometheus-alertmanager status
It is also managed by the user prometheus
ps -u prometheus
Note that the service is running on port 9093
Visit http://[your domain name or ip]:9093/
Block Port 9093 for external requests
iptables -A INPUT -p tcp -s localhost --dport 9093 -j ACCEPT iptables -A INPUT -p tcp --dport 9093 -j DROP iptables -L
Warning
iptables settings will be lost in case of system reboot. You will need to reapply them manually,
or
install iptables-persistent
sudo apt install iptables-persistent
This will save your settings into two files called,
/etc/iptables/rules.v4
/etc/iptables/rules.v6
Any changes you make to the iptables configuration won't be auto saved to these persistent files, so if you want to update these files with any changes, then use the commands,
iptables-save > /etc/iptables/rules.v4
iptables-save > /etc/iptables/rules.v6
Check the endpoint in the prometheus.yml is correctly set for the location of your Alertmanager.
sudo nano /etc/prometheus/prometheus.yml
Mine is set to the Alertmanager running locally on localhost:9093
...
# Alertmanager configuration
alerting:
alertmanagers:
- static_configs:
- targets: ['localhost:9093']
...
You can optionally also add the Alertmanager metrics endpoint to be scraped by prometheus as well so that you can monitor its performance.
scrape_configs:
...
- job_name: alertmanager
static_configs:
- targets: ['localhost:9093']