154 lines
4 KiB
Markdown
154 lines
4 KiB
Markdown
---
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title: Recycled Cloud Technical Intro
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author: Timothée Floure
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institute: e-Durable SA
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date: 2021-03-01
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license: CC BY-SA
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---
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# It works! (TM)
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\begin{center}
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We even have a website! \href{https://recycled.cloud/}{https://recycled.cloud/}
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\end{center}
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# High-Level Overview
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* 3 locations - **Yes, it's overkill**.
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* LNTH and LSNE are production capable.
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* LNTH has **power and network redundancy**.
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* **Networking** + **Distributed Storage** + QEMU/KVM **VMs**.
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* Humans: 1-1.5 Summer, 0.5 Autumn, 0.25 January, 1.25 these days.
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# Public-ish services
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* Web hosting: Static + Wordpress - **unmanaged**.
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* Storage / backups - **unmanaged**.
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* KVM Virtual Machine Hosting - **unmanaged**.
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**e-Durable is our biggest client by far.**
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* No management interface or billing pipeline so far.
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- Billing is hard. We'll leverage Odoo.
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# A bit of History
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\begin{center}
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\includegraphics{ungleich-logo-black.png}
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\end{center}
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* I arrived from ungleich.
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* The 3 locations were already in the pipe.
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* **OpenStack** (and JuJu + MAAS).
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* **Had to drop everything and start from scratch**.
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* Only low-end hardware around.
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# System Administration 101
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* Setting something up is easy, **keeping it running is not**.
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* **Complexity** is your worst enemy.
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# Technial Stack - General guidelines
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* **KISS**: Keep things as simple as possible.
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* Alpine Linux and Debian GNU/Linux.
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* Document things in the Wiki ([wiki.recycled.cloud](https://wiki.recycled.cloud)).
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* Use configuration management ([cdist](https://cdi.st)).
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* Obviously **FOSS**-only... non-free software is a PITA!
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# Technical Stack - Networking
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* We are registered at [RIPE](https://ripe.net): **AS208948**, x1 IPv4 **/22**, x1 IPv6 **/29**.
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* External BGP peering in every location, OSPF internally.
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* Two edge routers per location, for redundancy.
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* **IPv6-first** - IPv4 is **LEGACY** (and painful)!
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# Technical Stack - Core Infrastructure
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\begin{center}
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\includegraphics{location.png}
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\end{center}
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# Technical Stack - Services
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* Services usually run in their own VM.
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* Central user directory with OpenLDAP.
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* Monitoring is provided by Prometheus + Grafana.
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* Backups with Borg.
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* ...
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# Tooling
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* There was no tooling at e-Durable, so we made our own.
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* Software Forge: code.recycled.cloud
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* Documentation: wiki.recycled.cloud
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* Mailing Lists: lists.recycled.cloud
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* File Sharing: files.recycled.cloud
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* Chat: chat.recycled.cloud
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# Buffer slide
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That's all for the big lines! Let's do some hands-on exercises now.
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* Allocating & accessing a new VM.
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* Using the Software Forge.
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* Configure said VM with cdist.
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# Allocating a new VM
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\begin{center}
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\includegraphics[width=5cm]{one-logo.png}
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\end{center}
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* Web interface at one.$LOCATION.recycled.cloud, LDAP account.
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* VMs are defined by templates.
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* We build our own images - see the RecycledCloud/images repository
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* Allocating a new VM is easy: **demo**.
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# Using the Software Forge
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\begin{center}
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\includegraphics[width=10cm]{gitea-logo.png}
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\end{center}
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* Our **VCS** is **git**.
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* **Everything** regarding the RC lives in version control.
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* **If you don't use version control, you're likely doing it wrong**.
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* code.recycled.cloud provides remote git repositories and simple issue
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tracking.
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* Joachim makes lovely git introductions.
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# CDIST
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\begin{center}
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\includegraphics[width=5cm]{cdist-logo.jpeg}
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\end{center}
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* Configuration management tool (similar to Ansible, Puppet, Chef, ...).
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* **KISS**. Do one thing, and do it right.
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* Originally written by ungleichfolk, much larger community now.
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* Shellscript.
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# CDIST 101
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* Manifests
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* Types
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* Explorers
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# e-Durable CDIST workflow
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* dot-cdist.
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* cdist-workdir meta repository and third-party sources.
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* RecycledCloud and e-Durable each have their own repositories.
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* Shellcheck (it's convenient to have it built-in in your editor...).
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# References
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* Recycled Cloud account management: meta.recycled.cloud
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* Recycled Cloud Software Forge: code.recycled.cloud
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* Recycled Cloud Wiki: wiki.recycled.cloud
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* CDIST Manual: cdi.st
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* OpenNebula Web UI: one.{lnth,lsne}.ch.recycled.cloud
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