eve-ng : When a node won't start

 

/var/log/syslog shows:

Jun 18 11:21:18 labusraeveng01 iol_wrapper[105334]: 18/5 15:21:18.639 ERR#011Error while connecting local AF_UNIX: No such file or directory /tmp/netio33797/5 (2)

Jun 18 11:21:18 labusraeveng01 iol_wrapper[105334]: 18/5 15:21:18.639 ERR#011Cannot listen at AF_UNIX (5). ERR: Cannot open AF_UNIX sockets (2).

Jun 18 11:21:18 labusraeveng01 iol_wrapper[105334]: 18/5 15:21:18.639 ERR#011Failed to create AF_UNIX socket file (2).

Jun 18 11:21:18 labusraeveng01 iol_wrapper[105334]: 18/5 15:21:18.639 INF#011Caught SIGTERM, killing child.

For some reason the socket in /tmp doesn't exist anymore.

mkdir /tmp/netio33797

python -c "import socket as s; sock = s.socket(s.AF_UNIX); sock.bind('/tmp/netio33797/5')"

chown -R 33797:unl /tmp/netio33797

et voila!

eve-ng network/interface linux issues

 

Sometimes the ip-config of eve-ng itself is deleted (on the linux level)

/var/log/syslog shows:

Jun 18 15:49:13 labusraeveng01 systemd-udevd[104705]: Could not generate persistent MAC address for vun001000000221: No such file or directory

This could be caused by this https://github.com/systemd/systemd/issues/3374. What I did was:
- Add file /etc/systemd/network/99-default.link

- Content:
[Link]
# NamePolicy=kernel database onboard slot path
MACAddressPolicy=none

- Reboot the server

After the reboot:
rm -f /opt/ovf/.configured
su –
and configure networking again.
Check license:
/opt/unetlab/wrappers/unl_wrapper -a fixpermissions
In case the license stays invalid, try:
systemctl restart licserver

You could still see in /var/log/syslog other errors:

Jun 18 16:23:33 labusraeveng01 systemd-udevd[66982]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.

(bug in systemd, should be fixed as of systemd v239) but this seems cosmetic