NetBox: UnboundLocalError When Syncing Data Source

Error: UnboundLocalError

When adding a new Data Source to NetBox, it provides an UnboundLocalError message.

Local Data Source Error:

UnboundLocalError("cannot access local variable '_' where it is not associated with a value")

Remote Git Data Source Error:

UnboundLocalError("local variable '_' referenced before assignment")

Solution

The UnboundLocalError failure occurs when the dulwich package is missing from the venv environment. To fix this, add dulwich to the requirements.txt file, run the upgrade.sh script, and then restart the NetBox service.

If using Amazon S3 bucket, then boto3 must be added to the requirements.

Source: NetBox OSS 4.0.8 Documentation - Synchronized Data

Add dulwich and boto3 to Requirements File

printf "dulwich\nboto3\n" | sudo tee -a /opt/netbox/requirements.txt
# or
sudo sh -c "printf 'dulwich\nboto3\n' >> /opt/netbox/requirements.txt"

Exit Venv Then Run Upgrade Script

deactivate
sudo /opt/netbox/upgrade.sh

Restart NetBox Service then Activate Venv

sudo systemctl restart netbox netbox-rq
source /opt/netbox/venv/bin/activate

NetBox should now be able to sync with a local or remote Data Source!