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Docker install and upgrade guide – CentOS and Ubuntu

15 points by lukasbar 6y ago

Legogris 6y ago
Where does the requirements of 4GB RAM per worker come from? That doesn’t seem right.
- mrweasel 6y ago
  It’s fine, depending on what you plan to deploy. The how thing comes of as a bit disconnected, Docker doesn’t have worker or management node. I think this is part of some Docker Swarm thingy, but fails to make that clear.
- gnabgib 6y ago
  The minimum requirements are absurd considering 2017 forum recommendations of 512MB[0], it runs just fine in 1-2GB of ram (depending on what's in the containers).. but the free disk space is low (images alone exceed this pretty quickly). The "must OSes" are inaccurate.. maybe article related (but Ubuntu 20 was out when this was written).. considering the basic content in this is almost identical to Docker's documentation[1][2] including line break positions in the commands.. I'm not sure what the value add of this is? [0]: https://forums.docker.com/t/minimum-hardware-requirement-to-run-docker/28072 https://forums.docker.com/t/minimum-hardware-requirement-to-... [1]: https://docs.docker.com/engine/install/ubuntu/ https://docs.docker.com/engine/install/ubuntu/ [2]: https://docs.docker.com/engine/install/centos/ https://docs.docker.com/engine/install/centos/
s09dfhks 6y ago
Docker also maintains an endpoint you can curl curl -L https://get.docker.com https://get.docker.com | bash does most of the repo / ppa adding for you
hybby 6y ago
> CentOS 7.1+ 64 bit version good luck on CentOS 8. docker does not maintain el8 rpms, and installing the most recent offering from Docker requires that you work around several package conflict issues. in the end it just didn't feel good, and i ended up going down the (clearly recommended) podman route instead. however, rootless podman containers have their own gotchas... i kind of wish i'd installed debian on my homeserver instead. :)
- temikus 6y ago
  Thanks for this comment, I’m so glad now I switched to Debian-based for my home server now as it’s essentially just docker+mdadm machine.

15 points by lukasbar 6y ago

Legogris 6y ago

Where does the requirements of 4GB RAM per worker come from? That doesn’t seem right.

mrweasel 6y ago
It’s fine, depending on what you plan to deploy. The how thing comes of as a bit disconnected, Docker doesn’t have worker or management node. I think this is part of some Docker Swarm thingy, but fails to make that clear.
gnabgib 6y ago
The minimum requirements are absurd considering 2017 forum recommendations of 512MB[0], it runs just fine in 1-2GB of ram (depending on what's in the containers).. but the free disk space is low (images alone exceed this pretty quickly). The "must OSes" are inaccurate.. maybe article related (but Ubuntu 20 was out when this was written).. considering the basic content in this is almost identical to Docker's documentation[1][2] including line break positions in the commands.. I'm not sure what the value add of this is? [0]: https://forums.docker.com/t/minimum-hardware-requirement-to-run-docker/28072 https://forums.docker.com/t/minimum-hardware-requirement-to-... [1]: https://docs.docker.com/engine/install/ubuntu/ https://docs.docker.com/engine/install/ubuntu/ [2]: https://docs.docker.com/engine/install/centos/ https://docs.docker.com/engine/install/centos/

s09dfhks 6y ago

Docker also maintains an endpoint you can curl curl -L https://get.docker.com https://get.docker.com | bash does most of the repo / ppa adding for you

hybby 6y ago

> CentOS 7.1+ 64 bit version good luck on CentOS 8. docker does not maintain el8 rpms, and installing the most recent offering from Docker requires that you work around several package conflict issues. in the end it just didn't feel good, and i ended up going down the (clearly recommended) podman route instead. however, rootless podman containers have their own gotchas... i kind of wish i'd installed debian on my homeserver instead. :)

temikus 6y ago
Thanks for this comment, I’m so glad now I switched to Debian-based for my home server now as it’s essentially just docker+mdadm machine.