[hnlmorg]

> Docker was the first viable containerization technology on Linux.

No it wasn’t. Docker was late to the party even for Linux (and Linux was late compared to every other “UNIX”).

OpenVZ was around for years before docker. Its main issue was that it required out-of-tree kernel code. But there were some distributions that did still ship OpenVZ support. In fact it’s what Proxmox originally used. And it worked very well.

Then LXC came along. Fun fact, Docker was originally used LXC itself. But obviously that was a long time ago too.

I’ve used both OpenVZ and LXC in production systems before Docker came along. But I’ve always preferred FreeBSD Jails + ZFS to anything Linux has offered.