So, for everyone interested, I managed to get all the EE containers running thanks to your hint @ambtec.
net.ipv4.tcp_rfc1337 = 1to
sysctl --systemto reload the conf
I also updated my kernel to 5.4 as I read it solved Docker issues for a lot of people ( I’m running Ubuntu 18.04.4 )
I then shut down and removed every container, did a
/opt/easyengine/servicesand got EE global services turning green at last !
Then I went to my sites, did a
docker-compose upwithin the sites’ root folders, and I now have my sites back.
Phew… What a night it’s been…