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stormi merged 1 commit into from
Dec 1, 2025
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Document error with VDIs live migration #417

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25 changes: 25 additions & 0 deletions docs/troubleshooting/common-problems.md
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Expand Up @@ -271,3 +271,28 @@ It should be empty, but if you have the bug, you got `check_update`.
Remove `/var/lib/xcp-ng-xapi-plugins/updater.py.lock` and that should fix it.

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## Unable to live migrate VDI between SRs

### Cause

Upgrading from 8.2 to 8.3 can cause an issue where `/etc/stunnel/xapi-pool-ca-bundle.pem` is empty or missing
You can check this with `ls -l /etc/stunnel/xapi-pool-ca-bundle.pem` on the host.
It will cause issues when live-migrating VDIs between SRs (even if the VM remains on the same host).
The migration fails with:
```
Xenops_interface.Xenopsd_error([S(Internal_error);S(Sys_error(\"Connection reset by peer\"))])
```

### Solution

To fix this, create the file with the following command:
```
xe host-refresh-server-certificate host=<host name>
```
This will create the correct file on the host.
You will need to run the command on all hosts of the pool.

To know more about certificates in XAPI, check out the [XAPI documentation](https://xapi-project.github.io/new-docs/design/pool-certificates/index.html)

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