VNA fails to install with error - Response from VNA Server is "Internal Server Error"

Products

• Network Observability
• Virtual Network Assurance

Issue/Introduction

VNA server is failing upgrade with the following seen in the upgrade logs:

1 plugin configuration(s) found for upgrade

Updating config parameters of Meraki_7xxxxxx-xxxx-xxxx-xxxxx-xxxxxxxxxxx
ERROR: Plugin config Meraki_7xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx not upgraded. Response from VNA Server is "Internal Server Error"

Installation completed successfully

Plugin shows an Unknown Status in Portal:

Environment

DX NetOps Virtual Network Assurance (VNA) all currently supported releases

Cause

This is due to a lack of requisite permissions on the /tmp directory. 

Run:

mount | grep -w /tmp

If this returns noexec set on the /tmp directory, then it will need to be removed

Resolution

Need to remove  noexec as it blocks the direct execution of binary files and programs stored on that specific partition or directory.

vi /etc/fstab


Locate the line that mounts /tmp. It will look something like this:

/dev/mapper/vg_sys-lv_tmp /tmp ext4 defaults,nosuid,nodev,noexec 1 2

Remove noexec, then run systemctl daemon-reload and

mount -o remount /tmp

Then reinstall VNA or reconfigure plugins