...
Edit the prometheus.service file
Code Block vi /usr/lib/systemd/system/prometheus.service
Change the value of “
--storage.tsdb.retention.time=15d
" below to "ExecStart=/usr/local/bin/prometheus \
" line.
The config will look like below for 45 days of data retention. (e.g. 1 year:1y
or365d
)Code Block # /etc/systemd/system/prometheus.service [Unit] Description=Prometheus Server Documentation=https://prometheus.io/docs/introduction/overview/ After=network-online.target [Service] User=prometheus Restart=on-failure ExecStart=/usr/local/bin/prometheus \ --config.file=/etc/prometheus/prometheus.yml \ --storage.tsdb.path=/var/lib/prometheus/data \ --storage.tsdb.retention.time=45d \ --web.console.templates=/etc/prometheus/consoles \ --web.console.libraries=/etc/prometheus/console_libraries [Install] WantedBy=multi-user.target
NOTE: Ensure that the unit of time is correctly specified. For instance:
- ‘m
' for minutes
- ‘h
’ for hours
- ‘d
' for days
- 'y
’ for years
Reload systemd manager configuration
Code Block systemctl daemon-reload
Restart Prometheus service
Code Block systemctl restart prometheus
See the Prometheus documentation.