DNS Sidecar jobs fail regularily

[cptanalatriste]

✅ Checklist

• I have searched open and closed issues for duplicates.
• This is a problem observed when deploying a Data Safe Haven.
• I can reproduce this with the latest version.
• I have read through the documentation.
• This isn't an open-ended question (open a discussion if it is).

💻 System information

• Operating System: MacOS
• Data Safe Haven version: v5.1.1

📦 Packages

List of packages

Paste list of packages here

🚫 Describe the problem

The DNS Sidecar job is very erratic, it success some times but of the times it fails:

Checking the logs (see below), failing is not related to the Job logic. Instead, there seem to be problems in the allocation of nodes.

🌳 Log messages

Relevant log messages

Your log details here

♻️ To reproduce

Deploy an SRE with DSH v5.5+. While at the beginning jobs will succeed, we observed that with time failures start to increase.