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nano /etc/systemd/system/alertmanager.service

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systemctl daemon-reload
systemctl start alertmanager
systemctl enable alertmanager
systemctl status alertmanager

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grafana-cli plugins install camptocamp-prometheus-alertmanager-datasource

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service grafana-server restart

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rule_files:
  - alert.rules.yml
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      - 'localhost:9093'

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global:
  scrape_interval: 10s
rule_files:
  - alert.rules.yml
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      - 'localhost:9093'
scrape_configs:

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groups:
- name: alert.rules
  rules:
  - alert: InstanceDown
    expr: up == 0
    for: 1m
    labels:
      severity: "critical"
    annotations:
      summary: "Endpoint {{ $labels.instance }} down"

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promtool check rules alert.rules.yml

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Host Bastion
	Hostname x.x.x.x
	User Ubuntu

Host Instance
	Hostname x.x.x.x
	User Ubuntu

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# Start the SSH-Agent: 
ssh-agent -s
# Add your private key that allows you to access your infrastructure 
ssh-add -k ~/.ssh/cloud-infra-key.pem
# list the ssh-keys currently available in the ssh-agent
ssh-add -l
# additionally, you can remove a key from the ssh-agent using the following command
ssh-add -d  ~/.ssh/cloud-infra-key.pem