alertmanager.sh

#!/bin/bash 

sudo useradd -M -r -s /bin/false/ alertmanager
wget https://github.com/prometheus/alertmanager/releases/download/v0.20.0/alertmanager-0.20.0.linux-amd64.tar.gz
tar xvfz alertmanager-0.20.0.linux-amd64.tar.gz

sudo cp alertmanager-0.20.0.linux-amd64/alertmanager /usr/local/bin/
sudo chown alertmanager:alertmanager /usr/local/bin/alertmanager
sudo mkdir -p /etc/alertmanager

sudo cp alertmanager-0.20.0.linux-amd64/alertmanager.yml /etc/alertmanager

sudo chown -R alertmanager:alertmanager /etc/alertmanager
sudo mkdir -p /var/lib/alertmanager
sudo chown alertmanager:alertmanager /var/lib/alertmanager

cat << EOF > /etc/systemd/system/alertmanager.service
[Unit]
Description=Prometheus Alertmanager
Wants=network-online.target
Afet=network-online.target

[Service]
User=alertmanager
Group=alertmanager
Type=simple
ExecStart=/usr/local/bin/alertmanager \
  --config.file /etc/alertmanager/alertmanager.yml \
  --storage.path /var/lib/alertmanager/

[Install]

WantedBy=multi-user.target
EOF

sudo systemctl start alertmanager

sudo cp alertmanager-0.20.0.linux-amd64/amtool /usr/local/bin/
sudo mkdir -p /etc/amtool

cat << EOF > /etc/amtool/config.yml
alertmanager.url: http://localhost:9093
EOF

cat << EOF > /etc/prometheus/prometheus.yml
# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
       - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
    - targets: ['localhost:9090']
EOF

sudo systemctl restart prometheus