DX NetOps Upgrade to 25.4.8 fails on VNA component using upgrade automation with "Free disk space required on /root: 5 GB [ FAILED ]"

Products

Network Observability

Issue/Introduction

When performing a DX NetOps upgrade to version 25.4.8 using Upgrade Automation (UA), the process fails during the Virtual Network Assurance (VNA) task. The installer log shows the following error even if IATEMPDIR is correctly set to a partition with ample space:

==================================================================================
Disk Evaluation
---------------
Free disk space required on /root: 5 GB, available: 3 GB..................................[ FAILED ]
Free disk space required on /opt/CA: 5 GB, available: 46 GB..................................[ OK ]
Aborting Upgrade due to insufficient free disk space.

Cause

This is caused by a hardcoded check within the VNA installer script. The script strictly validates that 5 GB of free space is available on the /root partition. It does not honor the IATEMPDIR variable or other temporary directory overrides during this specific pre-flight evaluation.

Resolution

Engineering has identified this as a defect, and a permanent fix is scheduled for release in DX NetOps 25.4.10.

Workaround: To unblock the upgrade on systems where the /root partition cannot be expanded to 5 GB, follow these steps on the VNA host before running the upgrade:

Create a temporary symlink to redirect the /root path to a partition with sufficient space (e.g., /opt/CA):
bash
```
mv /root /root.realln -s /opt/CA /root
```

Execute the upgrade via Upgrade Automation or manually:

Restore the original directory structure immediately after the upgrade completes:
bash
```
rm /rootmv /root.real /root
```

Note: Alternatively, VNA can be upgraded manually while utilizing Upgrade Automation for the remaining DX NetOps components.