https://lawrence.video/proxmox

Forum Post
https://forums.lawrencesystems.com/t/when-you-should-and-should-not-use-docker-in-proxmox-lxc/26607

Should you run Docker in a Proxmox LXC container or a Virtual Machine? In this video, we move past the generic 'it depends' answer and look at the actual architectural requirements for Docker on Proxmox 9.1

Previous video covering LXC, Docker, and VM's
https://youtu.be/RB4ZEZ3I3tA?si=N35HnQnm-qlOPeWD

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Chapters
00:00 Running Docker in LXC
00:30 VM VS LXC Resource Usage
02:23 Isolation and Stability 
03:30 Live Migration 
04:08 Storage Mounting
05:30 Resource Usage
06:22 ZFS Optimization
08:11 When to choose LXC VS VM for Docker

Lawrence Systems

A practical comparison of running Docker inside LXC containers versus VMs on Proxmox 9.1, covering key trade-offs including kernel isolation, system stability, live migration, network storage (NFS/SMB), GPU passthrough, and resource efficiency. LXC containers use significantly less RAM (158MB vs 600MB for the same workload) and scale dynamically, but share the Proxmox kernel, meaning a kernel panic can crash the entire host. VMs offer stronger isolation and easier NFS/SMB mounts but consume more resources. The post also covers ZFS record size tuning to avoid write amplification with high-IO applications. Recommendations: use VMs for stability, live migration, and NAS-dependent stacks; use LXC for resource-constrained home labs running lightweight, self-contained apps like reverse proxies.

Should You Run Docker in LXC on Proxmox 9?