[...]
osd2 # [    5.294516] systemd[1]: Starting Create Volatile Files and Directories...
monA # [    3.796676] systemd[1]: Reached target Containers.
osd0 # [    6.469903] systemd[1]: Found device /dev/hvc0.
osd2 # [    5.307825] systemd[1]: Started Create Volatile Files and Directories.
(0.67 seconds)
monA: waiting for success: ceph osd stat | grep -e '3 osds: 3 up[^,]*, 3 in'
Fatal Python error: could not acquire lock for <_io.BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads

Thread 0x00007ffff64c4700 (most recent call first):
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 94 in eprint
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 745 in process_serial_output

Thread 0x00007ffff5cc3700 (most recent call first):
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 94 in eprint
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 745 in process_serial_output

Thread 0x00007ffff54c2700 (most recent call first):
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 94 in eprint
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 745 in process_serial_output

Thread 0x00007ffff4cc1700 (most recent call first):
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 94 in eprint
  File "/nix/store/ygl9dx10myiy1ka6kgi35prn6c535xp8-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 745 in process_serial_output

Current thread 0x00007ffff7893f40 (most recent call first):
(0.79 seconds)
monA: waiting for success: ceph -s | grep 'mgr: a(active,'
(0.79 seconds)
monA: waiting for success: ceph -s | grep 'HEALTH_OK'
/nix/store/vilh5ays3ymz3xkwk0fri2a70lha7pfc-stdenv-linux/setup: line 1271:     3 Aborted                 (core dumped) LOGFILE=$out/log.xml tests='exec(os.environ["testScript"])' /nix/store/wkmmx61nyr0ndh8kh1vpyh8l6csc5jp9-nixos-test-driver-basic-multi-node-ceph-cluster/bin/nixos-test-driver
builder for '/nix/store/33jy4sdn9jzxkmrdlidr6pzgxilanh3y-vm-test-run-basic-multi-node-ceph-cluster.drv' failed with exit code 134
error: build of '/nix/store/33jy4sdn9jzxkmrdlidr6pzgxilanh3y-vm-test-run-basic-multi-node-ceph-cluster.drv', '/nix/store/5p6zrdni0q24p2qwmxmjdx3n72mwc9yk-vm-test-run-basic-single-node-ceph-cluster.drv' failed