tl;dr: specify the --user root argument:

docker exec --interactive \
            --tty \
            --user root \
            --workdir / \
            container-name bash

A few years ago a colleague of mine told me about this thing called Docker, and I must admit I dismissed it as a fad…how wrong was I. Docker, and Docker Compose, are one of my key tools of the trade. With them I can build self-contained environments for tutorials, demos, conference talks etc. Tear it down, run it again, without worrying that somewhere a local config changed and will break things.

Doing some funky Docker Compose stuff, including:

(Previously, previously, previously)

Since Proxmox 4 has a recent Linux kernel and mainline one at that, it means that Docker can be run on it. I’ve yet to really dig into Docker and work out when it makes sense in place of Linux Containers (LXC), so this is going to be a learning experience for me.

To install Docker, add Backports repo to apt:

root@proxmox01:~# cat /etc/apt/sources.list.d/backports.list
deb http://ftp.debian.org/debian jessie-backports main

And then install:

After a long and painful delivery, I’m delighted to announce the arrival of a new addition to my household … :

This custom-build from Scan 3XS is sat in my study quietly humming away. I’m going to use it for hosting VMs for R&D on OBIEE, Big Data Lite, Elastic, InfluxDB, Kafka, etc. I’ll blog various installations that I’ve done on it as a reference for myself, and anyone else interested. Which I guess means, myself ;)