[Unit]
Description=Prometheus alertmanager
Wants=network-online.target
After=network-online.target

[Service]
User=prometheus
Group=prometheus
EnvironmentFile=-/etc/sysconfig/alertmanager
ExecStart=/usr/sbin/alertmanager \
    --config.file=/etc/alertmanager/alertmanager.yaml \
    --storage.path=/base/alertmanager \
    --web.config.file=/etc/prometheus/web-config.yaml

ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=always

[Install]
WantedBy=multi-user.target