What is this?
Bocker is a minimal reimplementation of Docker written in roughly 100 lines of bash, built to demonstrate how core container functionality works under the hood.
Bocker is a minimal reimplementation of Docker written in roughly 100 lines of bash, built to demonstrate how core container functionality works under the hood.Is this a real replacement for Docker or more of a learning exercise?It's a bash script that mimics Docker's CLI commands using Linux primitives like btrfs snapshots, cgroups, and network bridges — an educational demo of Docker internals, not a production container runtime.
It's a bash script that mimics Docker's CLI commands using Linux primitives like btrfs snapshots, cgroups, and network bridges — an educational demo of Docker internals, not a production container runtime.How do I get it running?Clone the repo and run the bocker script directly, or use the included Vagrantfile to spin up a preconfigured VM with all the required packages and network setup already in place.
Clone the repo and run the bocker script directly, or use the included Vagrantfile to spin up a preconfigured VM with all the required packages and network setup already in place.What do I need installed before I can run it?You need btrfs-progs, curl, iproute2, iptables, libcgroup-tools, util-linux >= 2.25.2 and coreutils >= 7.5, plus a btrfs filesystem mounted at /var/bocker and a network bridge called bridge0 with IP 10.0.0.1/24.
You need btrfs-progs, curl, iproute2, iptables, libcgroup-tools, util-linux >= 2.25.2 and coreutils >= 7.5, plus a btrfs filesystem mounted at /var/bocker and a network bridge called bridge0 with IP 10.0.0.1/24.What parts of Docker are missing?Data volume containers, data volumes, and port forwarding aren't implemented yet, and the docker build support is described as only a very limited implementation.
Data volume containers, data volumes, and port forwarding aren't implemented yet, and the docker build support is described as only a very limited implementation.Is it safe to run on my regular machine?No — Bocker runs as root and directly rewrites your network interfaces, routing table, and firewall rules, so the README recommends running it inside a VM even if your system already meets the prerequisites.
No — Bocker runs as root and directly rewrites your network interfaces, routing table, and firewall rules, so the README recommends running it inside a VM even if your system already meets the prerequisites.Which Docker commands does Bocker support?It implements build (limited), pull, images, ps, run, exec, logs, commit, rm, and rmi, plus basic networking and quota support via cgroups.
It implements build (limited), pull, images, ps, run, exec, logs, commit, rm, and rmi, plus basic networking and quota support via cgroups.Why does Bocker need a btrfs filesystem?Btrfs's copy-on-write snapshots are used to implement container layers and image commits, similar to how Docker itself can use btrfs as a storage driver.
Btrfs's copy-on-write snapshots are used to implement container layers and image commits, similar to how Docker itself can use btrfs as a storage driver.Is there an easy way to try it without configuring my own Linux box?Yes, the included Vagrantfile builds a virtual machine with all the required packages, filesystem, and network bridge already set up.
Yes, the included Vagrantfile builds a virtual machine with all the required packages, filesystem, and network bridge already set up.What are similar projects?ProxmoxVE, distrobox, webhook, hadolint, skopeo, Linux-, neofetch, Proxmox
ProxmoxVE, distrobox, webhook, hadolint, skopeo, Linux-, neofetch, ProxmoxWhich topics is it in?containerization, educational, script, virtualization, bash, containers, sysadmin, shell, utility, devops, learning, gplv3
containerization, educational, script, virtualization, bash, containers, sysadmin, shell, utility, devops, learning, gplv3