Re: Unable to start more than 14 domUs - libxl__xs_transaction_commit: could not commit xenstore transaction

[Jürgen Groß <jgross@xxxxxxxx>]

On 03.06.20 14:15, J. Roeleveld wrote:
> Hi all,
>
> I upgraded to Xen 4.12.2 recently and since the upgrade, I am unable to start
> more than 14 domUs. >
> The error, when trying to start the 15th, is:
> Parsing config from /etc/xen/boot/stage7/dbtest
> libxl: error: libxl_xshelp.c:265:libxl__xs_transaction_commit: could not
> commit xenstore transaction: No space left on device
> libxl: error: libxl_xshelp.c:265:libxl__xs_transaction_commit: could not
> commit xenstore transaction: No space left on device
> libxl: error: libxl_create.c:1318:domcreate_launch_dm: Domain 20:unable to add
> disk devices
> libxl: error: libxl_domain.c:1038:libxl__destroy_domid: Domain 20:Non-existant
> domain
> libxl: error: libxl_domain.c:993:domain_destroy_callback: Domain 20:Unable to
> destroy guest
> libxl: error: libxl_domain.c:920:domain_destroy_cb: Domain 20:Destruction of
> domain failed
>
>
>
> The domUs showing the issue get the disks from a driver-domain.
Ah, this might be related to hitting some Xenstore quota.

As you are seeing the problem in libxl__xs_transaction_commit I guess
you should increase the number of Xenstore entries per domain.

The default is 1000, you can set the value via the -E start parameter of
xenstored (e.g. "-E 5000" to set it to 5000), or if you are using
oxenstored by editing your /etc/xen/oxenstored.conf file (entry
"quota-maxentity").


Juergen