Cannot start performance test on ARM K8s: Action id 32 failed: Failed: sysbench is not prepared

[taurus-forever]

Steps to reproduce

1. juju set-model-constraints arch=arm64
2. juju deploy postgresql-k8s --trust --channel 14/edge --config profile=testing
3. juju deploy sysbench
4. juju config sysbench threads=1 scale=1 duration=300
5. juju relate sysbench postgresql-k8s
6. wait for all stable
7. juju run sysbench/leader prepare

taurus@pi5juju:~$ juju run sysbench/leader prepare
Running operation 29 with 1 task
  - task 30 on unit-sysbench-0

Waiting for task 30...
ERROR timed out waiting for results from: unit sysbench/0
...
taurus@pi5juju:~$ juju show-task 30
status: prepared


taurus@pi5juju:~$ juju run sysbench/leader run
Running operation 31 with 1 task
  - task 32 on unit-sysbench-0

Waiting for task 32...
Action id 32 failed: Failed: sysbench is not prepared

Expected behavior

No errors and test on Microk8s started the same way as on LXD.
I have feeling it used to work earlier... and lost in the last revisions.

Actual behavior

Cannot start performance test.

Versions

Operating system: Ubuntu 23.10
Juju CLI: 3.4.2-genericlinux-arm64
Juju agent: see above
Charm revision: see above
LXD: not applicable
MicroK8s: MicroK8s v1.30.0 revision 6788 (strict)

taurus@pi5juju:~$ juju status
Model  Controller  Cloud/Region        Version  SLA          Timestamp
arm    m2k8s       microk8s/localhost  3.4.2    unsupported  03:04:09+02:00

App             Version  Status  Scale  Charm           Channel        Rev  Address         Exposed  Message
postgresql-k8s  14.11    active      1  postgresql-k8s  14/edge        248  10.152.183.57   no       Primary
sysbench                 active      1  sysbench        latest/stable   25  10.152.183.154  no       

Unit               Workload  Agent  Address     Ports  Message
postgresql-k8s/0*  active    idle   10.1.46.58         Primary
sysbench/0*        active    idle   10.1.46.63         

Juju debug-log is clean... no errors.

[github-actions]

https://warthogs.atlassian.net/browse/DPE-4287