Schedule scans

The data on the map comes from the last scan. Scan each VLAN at regular intervals, for example every 15 minutes.

Before you start

Log in the user that runs the scans, so that it has the configuration file. See Install the collector.

With cron

Add one line for each VLAN to the crontab of the user:

*/15 * * * * shellgraph scan --env Production --vlan app-10 >> /var/log/shellgraph-app-10.log 2>&1

With a systemd timer

1. Make the service file /etc/systemd/system/shellgraph-scan@.service.

   [Unit]
   Description=ShellGraph scan of VLAN %i
   After=network-online.target
   Wants=network-online.target
   
   [Service]
   Type=oneshot
   User=shellgraph
   Environment=SHELLGRAPH_ENV=Production
   ExecStart=/usr/local/bin/shellgraph scan --env ${SHELLGRAPH_ENV} --vlan %i
   

2. Make the timer file /etc/systemd/system/shellgraph-scan@.timer.

   [Unit]
   Description=ShellGraph scan of VLAN %i every 15 minutes
   
   [Timer]
   OnBootSec=2min
   OnUnitActiveSec=15min
   RandomizedDelaySec=60
   
   [Install]
   WantedBy=timers.target
   

3. Load the files.

   systemctl daemon-reload
   

4. Start the timer for each VLAN.

   systemctl enable --now shellgraph-scan@app-10.timer
   

5. Look at the result of the last scan.

   journalctl -u shellgraph-scan@app-10.service -n 20