VLAB random SSH connectivity failures

[pau-hedgehog]

Observed SSH connection to server failure in:
https://github.com/githedgehog/fabricator/actions/runs/12743481149/job/35513736851

09:27:19 DBG Ping result from=server-06 to=server-01 expected=false ok=false fail=true err="Process exited with status 1" out="PING 10.0.1.2 (10.0.1.2) 56(84) bytes of data.\n\n--- 10.0.1.2 ping statistics ---\n5 packets transmitted, 0 received, 100% packet loss, time 4121ms"
09:27:21 DBG IPerf3 result from=server-03 to=server-04 sendSpeed="4.16 Mbps" receiveSpeed="3.94 Mbps" sent="2.60 MB" received="2.47 MB"
09:27:21 DBG Running iperf from=server-06 to=server-05
09:27:27 DBG IPerf3 result from=server-06 to=server-05 sendSpeed="27.16 Mbps" receiveSpeed="26.66 Mbps" sent="16.97 MB" received="16.79 MB"
09:27:27 DBG Running iperf from=server-10 to=server-09
09:27:34 DBG IPerf3 result from=server-10 to=server-09 sendSpeed="8.05 Mbps" receiveSpeed="7.73 Mbps" sent="5.03 MB" received="4.86 MB"
09:27:34 DBG Running iperf from=server-08 to=server-07
09:27:40 DBG IPerf3 result from=server-08 to=server-07 sendSpeed="2.71 Mbps" receiveSpeed="2.45 Mbps" sent="1.70 MB" received="1.54 MB"
09:27:40 DBG Running iperf from=server-04 to=server-03
09:27:46 DBG IPerf3 result from=server-04 to=server-03 sendSpeed="4.96 Mbps" receiveSpeed="4.69 Mbps" sent="3.10 MB" received="2.94 MB"
09:27:46 DBG Running iperf from=server-05 to=server-06
09:27:53 DBG IPerf3 result from=server-05 to=server-06 sendSpeed="11.22 Mbps" receiveSpeed="10.91 Mbps" sent="7.01 MB" received="6.87 MB"
09:27:53 DBG Running iperf from=server-07 to=server-08
09:27:59 DBG IPerf3 result from=server-07 to=server-08 sendSpeed="2.72 Mbps" receiveSpeed="2.52 Mbps" sent="1.70 MB" received="1.58 MB"
09:27:59 DBG Running iperf from=server-09 to=server-10
09:28:06 DBG IPerf3 result from=server-09 to=server-10 sendSpeed="3.87 Mbps" receiveSpeed="3.56 Mbps" sent="2.42 MB" received="2.24 MB"
09:28:06 ERR Error(s) during testing connectivity
09:28:06 ERR Error key=vpcpeer--server-01--server-02 err="checking iperf from server-01 to server-02: running iperf: running iperf server: Process exited with status 1: Directory tree /var/lib/toolbox/core-ghcr.io_githedgehog_toolbox-latest is currently busy.\n"
09:28:06 ERR Error key=vpcpeer--server-02--server-01 err="checking iperf from server-02 to server-01: running iperf: running iperf server: ssh: rejected: connect failed (open failed): "
09:28:06 WRN Error running on-ready commands err="testing connectivity: testing connectivity: testing connectivity from \"server-02\" to \"server-01\": checking iperf from server-02 to server-01: running iperf: running iperf server: ssh: rejected: connect failed (open failed): "
09:28:21 DBG Force exit with code 2 err="context canceled"

[pau-hedgehog]

Another hit: https://github.com/githedgehog/fabricator/actions/runs/12755043108/job/35550398960