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Running Docker on two hosts, bridged with Open vSwitch

This Gist shows how to use Open vSwitch to bridge Docker containers on two hosts. It is based on this blog post http://goldmann.pl/blog/2014/01/21/connecting-docker-containers-on-multiple-hosts/.

A similar Gist using Tinc instead of Open vSwitch is available: https://gist.github.com/noteed/11031504.

Setup

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hosts.csv
hosts.db

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Pandoc, Tufte CSS, and more

• https://github.com/edwardtufte/tufte-css: Where it all starts.
• https://github.com/jez/tufte-pandoc-css: Starter files for using Pandoc Markdown with Tufte CSS, untouched since March 2019 (MIT licensed).
• https://github.com/schollz/markdown2tufte: Based on the previous link. The tufte.html5 file is identical. Untouched (excepted the README) since November 2017.
• https://eddelbuettel.github.io/tint/: Tint Is Not Tufte, An implementation in R Markdown, possible inspiration.
• https://arthurperret.fr/2018/12/04/semantique-et-mise-en-forme/: Contenu en français.
• https://github.com/Synthetica9/tufte-pandoc: Seems to be LaTeX-specific.
• https://goodwill.awardwinninghuman.com/: Good-looking page with D3.js graphics.

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Notes about caching Nix builds

You can use Cachix (I haven't tried it yet but people are happy with it), or spend time like I do crawling through similar notes.

I have to put back my notes in order, because of this tweets: https://twitter.com/noteed/status/1285875859468029958

It turns out I did use a cache on Digital Ocean Spaces in the past, but I didn't have much notes.

Links

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Notes about creating small Docker images with Haskell binaries.

At first I haven't manage yet to do what I want. In this thread, there is a solution: http://mail.haskell.org/pipermail/haskell-cafe/2015-April/119021.html for the dynamic case. See below for the complete rootfs I use (similar thus to https://github.com/snoyberg/haskell-scratch).

We want a minimal Docker image with the following program.

> cat Example.hs
main = putStrLn "Hello, world."

Compiling the program

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Following https://github.com/rsms/inter/blob/master/CONTRIBUTING.md#compiling-font-files

$ make -j test
The program ‘make’ is currently not installed. It is provided by
several packages. You can install it by typing one of the following:
  nix-env -iA nixos.gnumake
 nix-env -iA nixos.gnumake42

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data V4 = V4 deriving Show

data V6 = V6 deriving Show

class V4Getter getter where getIPV4 :: getter -> IO V4

class V6Getter getter where getIPV6 :: getter -> IO V6

class (V4Getter getter, V6Getter getter) => V4V6Getter getter

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This is a Gist demonstrating how to populate a SQLite database with some content coming from a Markdown file, adding full-text search capability, and querying it with a small Scotty-based web server.

In particular, this uses

• direnv and a shell.nix file to easily get a development environment,
• pandoc --to markdown to remove any metadata block (an alternative is --to plain,
• SQLite's readile function to insert the content of a file in the database,
• SQLite's FTS feature,

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Learn Jira

I'm trying go-jira, but there is also jira-cli in Python.

I've generated an API token at https://id.atlassian.com/manage-profile/security/api-tokens and pasted it in my password store:

$ pass edit jira/smart-token

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Steam on NixOS

A wiki page exists: https://nixos.wiki/wiki/Steam.

I started with simply nix-shell -p steam, which failed with a 404 while trying to download some .deb. I updated my nixos channel, then tried again, and got a shell.

Then I run the following and got a problem: