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01/01: talks: Add OpenTechSummit 2015 talk.
|
From: |
Ricardo Wurmus |
|
Subject: |
01/01: talks: Add OpenTechSummit 2015 talk. |
|
Date: |
Sun, 24 May 2015 15:36:19 +0000 |
rekado pushed a commit to branch master
in repository maintenance.
commit 028164d344cfa23d5fffdd889aac9acebc724712
Author: Ricardo Wurmus <address@hidden>
Date: Sun May 24 17:32:25 2015 +0200
talks: Add OpenTechSummit 2015 talk.
---
talks/ots-2015/demo-home/.bashrc | 11 +
talks/ots-2015/demo-home/start.sh | 16 +
talks/ots-2015/images/function.pdf | Bin 0 -> 8071 bytes
talks/ots-2015/images/function.svg | 259 ++++++
talks/ots-2015/images/functional-package.pdf | Bin 0 -> 42240 bytes
talks/ots-2015/images/gnuhead.pdf | Bin 0 -> 70558 bytes
talks/ots-2015/images/guix-logo.pdf | Bin 0 -> 1999 bytes
talks/ots-2015/images/guixsd-logo.pdf | Bin 0 -> 48878 bytes
talks/ots-2015/images/profile-1.pdf | Bin 0 -> 128646 bytes
talks/ots-2015/images/profile-2.pdf | Bin 0 -> 173219 bytes
talks/ots-2015/images/profiles.svg | 1239 ++++++++++++++++++++++++++
talks/ots-2015/outline.org | 144 +++
talks/ots-2015/talk.pdf | Bin 0 -> 476941 bytes
talks/ots-2015/talk.tex | 314 +++++++
14 files changed, 1983 insertions(+), 0 deletions(-)
diff --git a/talks/ots-2015/demo-home/.bashrc b/talks/ots-2015/demo-home/.bashrc
new file mode 100644
index 0000000..64999d0
--- /dev/null
+++ b/talks/ots-2015/demo-home/.bashrc
@@ -0,0 +1,11 @@
+# .bashrc
+
+# User specific aliases and functions
+export USER=demo
+export HOME=/home/rekado/demo-home
+export PATH=~/.guix-profile/bin:~/.guix-profile/sbin:$PATH
+export LOCPATH="$HOME/.guix-profile/lib/locale/:$LOCPATH"
+
+PS1='address@hidden \w\$ '
+alias ls='ls -p --color'
+alias ll='ls -l'
diff --git a/talks/ots-2015/demo-home/start.sh
b/talks/ots-2015/demo-home/start.sh
new file mode 100755
index 0000000..0a77c0a
--- /dev/null
+++ b/talks/ots-2015/demo-home/start.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -e
+
+export USER=demo
+export HOME=/home/rekado/demo-home
+cd
+unset GUILE_LOAD_PATH
+unset GUILE_LOAD_COMPILED_PATH
+export
PATH=$HOME/.guix-profile/bin:/run/current-system/profile/bin:$HOME/local/bin:/run/setuid-programs
+rm -f /var/guix/profiles/per-user/demo/guix-profile*
+rm -f ~/.guix-profile
+rm -f old-times*
+rm -rf ~/hello*
+unset LANGUAGE
+exec bash
diff --git a/talks/ots-2015/images/function.pdf
b/talks/ots-2015/images/function.pdf
new file mode 100644
index 0000000..c0a7a8d
Binary files /dev/null and b/talks/ots-2015/images/function.pdf differ
diff --git a/talks/ots-2015/images/function.svg
b/talks/ots-2015/images/function.svg
new file mode 100644
index 0000000..dd030c4
--- /dev/null
+++ b/talks/ots-2015/images/function.svg
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diff --git a/talks/ots-2015/images/functional-package.pdf
b/talks/ots-2015/images/functional-package.pdf
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b/talks/ots-2015/images/guix-logo.pdf
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b/talks/ots-2015/images/profile-1.pdf
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diff --git a/talks/ots-2015/images/profile-2.pdf
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new file mode 100644
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diff --git a/talks/ots-2015/outline.org b/talks/ots-2015/outline.org
new file mode 100644
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--- /dev/null
+++ b/talks/ots-2015/outline.org
@@ -0,0 +1,144 @@
+* Outline
+** Package management is a good idea
+*** easy to install, upgrade, remove software
+*** dependency resolution
+*** centrally maintained
+so no need to scour the Internet for installers or sources
+
+** Problems
+But with traditional means there are still annoyances probably many of
+us have run into:
+
+*** outdated packages
+The application you want to use is too old in the official
+repositories.
+
+*** version conflicts
+You can't have two versions of an application installed at the same
+time. Most package systems won't accomodate this need for arbitrary
+versions.
+
+*** changes affect all users
+On a shared system a package upgrade affects everyone on the system.
+It happened often that I would accidentally break the system for other
+users on the same machine after an upgrade even though everything
+worked fine for me. It would have been nice if I could have only
+updated the applications I was using. These problems get a lot worse
+in big shared environments like clusters.
+
+*** potentially dangerous
+When a package is installed, system files are overwritten one by one.
+When this process is aborted you end up with a system in an
+inconsistent state.
+
+There is also another potential danger: binary packages are
+inscrutable blobs. Reproducible builds are near-impossible with
+binary maintainer uploads. How can we really trust?
+
+** Partial solutions
+*** third-party repositories
+They may solve the problem of outdated packages, but sufficiently
+large repositories such as EPEL may aggravate version conflicts. They
+all share the problem of trust.
+*** manual compilation
+You say you don't want to trust other people's binary packages so you
+compile software manually. This is not very practical as we lose all
+the benefits of package management: no more easy upgrades, no easy
+removal, no dependency tracking.
+*** language-specific package systems
+This just dilutes the problem and makes it all the more challenging to
+properly *manage* software. These package systems often don't even
+have feature parity with established system package managers as they
+aren't made for general package management.
+*** build your own system package
+This is rather hard for users because of arcane description languages
+and package formats, special build tools and directory structures,
+etc. It is uncomfortable even when you are trained to do this and do
+it somewhat regularly.
+*** meta-package managers
+The frustration with traditional packaging procedures has resulted in
+the rise of meta-package managers that generate low-quality but
+installable RPMs, debs or gems. Using them may simplify getting
+software installed and tracked by the system package manager, but it
+does not solve any of the other problems and is actually equal to
+admitting that packaging is hard.
+*** giving up
+You could also just shrug and deploy software by downloading an
+"appliance" or by using disk snapshots. There are very popular
+variations on this theme now but they all have in common that they are
+rather blunt and undisciplined. They ignore the problem and abstract
+it away with another level of binary indirection.
+
+** Guix
+Another approach is functional package management, and GNU Guix is my
+functional package manager of choice. What *is* functional package
+management?
+
+** Functional?
+Well, what is a function? This slide shows a pure function g that
+takes red discs and outputs green stars. That's *all* it can do. It
+cannot turn off the lights or eat all your candy. This means it has
+no side-effects.
+
+It performs its task no matter the environment in which it operates.
+It does not depend on anything except the red disc, its input.
+
+Given a certain input it always returns the same output; the result is
+immutable.
+
+** Functional packages
+Mapping this to package management, we want the output of a package
+recipe to be solely determined by its inputs, i.e. its bag of
+dependencies. These inputs may be development headers, compilers and
+other build tools, and libraries, and their dependencies as well. The
+output is an immutable package.
+
+** Functional package management
+We want a package definition to behave like a pure function; nothing
+in the environment (no other installed libraries, applications or
+headers) should affect it. It should only depend on declared and
+inherited inputs.
+
+This leads to reproducible results, so we can cache results and even
+offload the build process to other machines.
+
+The output should be immutable. It may not be changed by any other
+package evaluation. Any package built must be side-effect free.
+
+** Build process
+In the case of Guix these properties are achieved by isolating each
+build. An unprivileged user communicates with the build daemon to
+make it build software. Each build is performed by one of the
+unprivileged build users in a chroot in which only the declared inputs
+are available. The results of each build are placed in their own,
+separate, unique directory in a cache called the store.
+
+* Demos
+** preparation
+cd ./demo-home
+./start.sh
+
+** installing a package
+which hello # does not exist
+guix package -i hello
+guix package --list-installed # shows hello in store
+which hello # shows hello in PATH
+
+switch to other user, show that "hello" only exists
+
+** profiles
+guix package -i guile
+guile --version
+
+guix package -i python -r guile
+guix package --list-generations
+guix package --roll-back
+
+guix package -p old-times -i guile-1.8.8
+./old-times/bin/guile --version
+
+** reusing recipes for testing pre-releases or custom modifications
+tar xf $(guix build -S hello) && \
+ sed -i -e 's/Welt/Open Tech Summit/' hello-2.10/po/de.gmo && \
+ tar czf hello-3.tar.gz hello-2.10 && \
+ guix build --with-source=$HOME/hello-3.tar.gz hello
diff --git a/talks/ots-2015/talk.pdf b/talks/ots-2015/talk.pdf
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diff --git a/talks/ots-2015/talk.tex b/talks/ots-2015/talk.tex
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+++ b/talks/ots-2015/talk.tex
@@ -0,0 +1,314 @@
+\documentclass{beamer}
+
+\usetheme{default}
+
+\usefonttheme{structurebold}
+\usepackage{helvet}
+\usecolortheme{seagull} % white on black
+
+\usepackage[utf8]{inputenc}
+\PassOptionsToPackage{hyphens}{url}\usepackage{hyperref,xspace,multicol}
+\usepackage[absolute,overlay]{textpos}
+\usepackage{tikz}
+\usetikzlibrary{arrows,shapes,trees,shadows,positioning}
+%% \usepackage{tree}
+\usepackage{fancyvrb} % for \Verb
+\usepackage{ulem} % for \sout
+
+% Remember the position of every picture.
+\tikzstyle{every picture}+=[remember picture]
+
+\tikzset{onslide/.code args={<#1>#2}{%
+ \only<#1>{\pgfkeysalso{#2}} % \pgfkeysalso doesn't change the path
+}}
+
+% Colors.
+\definecolor{guixred1}{RGB}{226,0,38} % red P
+\definecolor{guixorange1}{RGB}{243,154,38} % guixorange P
+\definecolor{guixyellow}{RGB}{254,205,27} % guixyellow P
+\definecolor{guixred2}{RGB}{230,68,57} % red S
+\definecolor{guixorange2}{RGB}{236,117,40} % guixorange S
+\definecolor{guixtaupe}{RGB}{134,113,127} % guixtaupe S
+\definecolor{guixgrey}{RGB}{91,94,111} % guixgrey S
+\definecolor{guixblue1}{RGB}{38,109,131} % guixblue S
+\definecolor{guixblue2}{RGB}{10,50,80} % guixblue S
+\definecolor{guixgreen1}{RGB}{133,146,66} % guixgreen S
+\definecolor{guixgreen2}{RGB}{157,193,7} % guixgreen S
+
+\setbeamerfont{title}{size=\huge}
+\setbeamerfont{frametitle}{size=\huge}
+
+% Black-on-white color theme.
+\setbeamercolor{structure}{fg=guixblue2}
+\setbeamercolor{title}{fg=guixblue2}
+\setbeamercolor{frametitle}{fg=guixblue2}
+\setbeamercolor{date}{fg=darkgray}
+\setbeamercolor{author}{fg=darkgray}
+\setbeamercolor{alerted text}{fg=guixgreen2,bg=black}
+
+\title{Functional Package Management with GNU Guix}
+%%\subtitle{How GNU Guix Seeks to Empower Users}
+
+\author{Ricardo address@hidden
+\date{\small{OpenTechSummit\\14 May 2015}}
+
+\setbeamertemplate{navigation symbols}{} % remove the navigation bar
+
+\AtBeginSection[]{
+ \begin{frame}
+ \frametitle{}
+ \tableofcontents[currentsection, hideothersections]
+ \end{frame}
+}
+
+
+\AtBeginSubsection[]{
+ \begin{frame}
+ \frametitle{}
+ \tableofcontents[currentsection, currentsubsection]
+ \end{frame}
+}
+
+\begin{document}
+
+\maketitle
+
+\begin{frame}{Good idea}
+ \Large{
+ \begin{itemize}
+ \item easy to install, upgrade, remove software
+ \item dependency resolution
+ \item centrally maintained repositories
+ \end{itemize}
+ }
+\end{frame}
+
+\begin{frame}{Common problems}
+ \Large{
+ \begin{itemize}
+ \item outdated packages
+ \item version conflicts
+ \item changes affect all users
+ \item potentially dangerous
+ \item trust
+ \end{itemize}
+ }
+\end{frame}
+
+\begin{frame}{Partial solutions}
+ \setbeamercovered{transparent=35}
+
+ \Large{
+ \begin{itemize}[<+>]
+ \item \alert{third-party repositories}\\
+ EPEL, PPAs, ...
+ \item \alert{manual compilation}\\
+ install to custom prefix, static linking
+ \item \alert{language-specific package systems}\\
+ gem, cabal, pip, cpan, npm ...
+ \item \alert{build your own system package}\\
+ RPM, deb, PKGBUILD, ...
+ \item \alert{meta package managers}\\
+ e.g. fpm generating RPM, deb, gem
+ \item \alert{giving up}\\
+ virtual machines, ``app images'', snapshots
+ \end{itemize}
+ }
+\end{frame}
+
+\begin{frame}[plain]
+ \includegraphics[width=\textwidth]{images/guix-logo}
+\end{frame}
+
+\begin{frame}[plain]
+ \begin{center}
+ \includegraphics[height=0.6\textheight]{images/function}
+ \end{center}
+\end{frame}
+
+\begin{frame}[plain]
+ \begin{center}
+ \includegraphics[height=0.8\textheight]{images/functional-package}
+ \end{center}
+\end{frame}
+
+\begin{frame}{Functional package management}
+ \Large{
+ \begin{itemize}
+ \item no \alert{global} values:\\
+ /bin, /usr/include, /usr/lib, ...
+ \item \alert{purity}:\\
+ only declared inputs are visible at build time
+ \item \alert{reproducible} results:\\
+ build outputs can be cached and substituted;\\
+ automatic deduplication!
+ \item \alert{immutable results} without \alert{side effects}:\\
+ nothing outside of the cache and internal state is modified
+ \end{itemize}
+ }
+\end{frame}
+
+\begin{frame}[fragile]{}
+ \begin{tikzpicture}[tools/.style = {
+ text width=35mm, minimum height=4cm,
+ text centered,
+ rounded corners=2mm,
+ fill=black, text=white
+ },
+ tool/.style = {
+ fill=black, text=white, text width=3cm,
+ text centered
+ },
+ daemon/.style = {
+ rectangle, text width=50mm, text centered,
+ rounded corners=2mm, minimum height=15mm,
+ top color=guixorange1,
+ bottom color=guixyellow,
+ text=black
+ },
+ builders/.style = {
+ draw=guixorange1, very thick, dashed,
+ fill=white, text=black, text width=5cm,
+ rounded corners=2mm,
+ },
+ builder/.style = {
+ draw=guixred2, thick, rectangle,
+ fill=white, text=black,
+ rotate=90
+ }]
+ \matrix[row sep=3mm, column sep=1cm] {
+ \node(builders)[builders, text height=5cm]{}
+ node at (0, 2) {\large{\textbf{build processes}}}
+ node at (0, 1.5) {chroot, separate UIDs}
+ node[builder] at (-1,-0.5) {\alert{Guile}, make, etc.}
+ node[builder] at ( 0,-0.5) {\alert{Guile}, make, etc.}
+ node[builder] at ( 1,-0.5) {\alert{Guile}, make, etc.}; &
+ \node[tools]{}
+ node[text=white] at (0, 1) {\large{\textbf{Guix client}}}
+ node[tool] at (0, 0) {\texttt{(guix packages)}}
+ node(client)[tool] at (0, -1) {\texttt{(guix store)}};
+ \\
+
+ \node(daemon)[daemon]{\large{\textbf{build daemon}}}; &
+ &
+ \\
+ };
+ \end{tikzpicture}
+
+ \begin{tikzpicture}[overlay]
+ \path[very thick, draw=guixblue2]
+ (client.south) edge [out=-90, in=0, ->] node[below, sloped]{RPCs}
(daemon.east);
+ \path[->, very thick, draw=guixblue2]
+ (daemon) edge (builders);
+ \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[plain]
+ \begin{center}
+ \includegraphics[height=\textheight]{images/profile-1}
+ \end{center}
+\end{frame}
+\begin{frame}[plain]
+ \begin{center}
+ \includegraphics[height=\textheight]{images/profile-2}
+ \end{center}
+\end{frame}
+
+\begin{frame}[fragile]
+ \begin{semiverbatim}
+(define hello
+ (\alert{package}
+ (name "hello")
+ (version "2.8")
+ (source (\alert{origin}
+ (method url-fetch)
+ (uri (string-append
+ "mirror://gnu/\textrm{...}/hello-" version
+ ".tar.gz"))
+ (sha256 (base32 "0wqd\textrm{...}dz6"))))
+ (\alert{build-system} gnu-build-system)
+ (synopsis "Hello, GNU world: An example GNU package")
+ (description "Produce a friendly greeting.")
+ (home-page "http://www.gnu.org/software/hello/";)
+ (license gpl3+)))
+ \end{semiverbatim}
+\end{frame}
+
+\begin{frame}[plain]
+
+ \vspace{0.7cm}
+ \Large{
+ \begin{itemize}
+ \item version 0.8.2 is \textbf{out now}
+ \item quickly growing collection of package recipes (1800+)
+ \item \textbf{install the distribution}
+ \item \textbf{use it}, report bugs, add packages
+ \item share your \textbf{ideas}!
+ \end{itemize}
+ }
+
+ \begin{textblock}{5}(7,8)
+ \tikz
+ \node[overlay, rounded corners=4, text centered,
+ minimum size=10mm, fill=guixorange1, text width=5cm,
+ inner sep=3mm, rotate=-7, opacity=.75, text opacity=1,
+ drop shadow={opacity=0.5}] at (3, 3) {
+ \textbf{your help needed!}
+ };
+ \end{textblock}
+\end{frame}
+
+\begin{frame}{}
+\hfill{
+ \includegraphics[width=0.5\textwidth]{images/gnuhead}
+ \includegraphics[width=0.5\textwidth]{images/guixsd-logo}}
+\vfill{
+ \hfill{\includegraphics[width=0.3\textwidth]{images/guix-logo}}\\[0.2cm]
+ address@hidden \hfill{\alert{\url{http://gnu.org/software/guix/}}}
+}
+
+\end{frame}
+
+\begin{frame}{}
+
+ \begin{textblock}{12}(2, 8)
+ \tiny{
+ Copyright \copyright{} 2015 Ricardo Wurmus address@hidden
+ Copyright \copyright{} 2010, 2012, 2013, 2014 Ludovic Courtès
address@hidden
+ \\[3.0mm]
+ A GNU head, GFDL, \url{http://gnu.org/graphics/agnuhead.html}\\
+ GNU Guix logo, GFDL, \url{http://gnu.org/s/guix/graphics}
+
+ Copyright of other images included in this document is held by
+ their respective owners.
+ \\[3.0mm]
+ This work is licensed under the \alert{Creative Commons
+ Attribution-Share Alike 3.0} License. To view a copy of this
+ license, visit
+ \url{http://creativecommons.org/licenses/by-sa/3.0/} or send a
+ letter to Creative Commons, 171 Second Street, Suite 300, San
+ Francisco, California, 94105, USA.
+ \\[2.0mm]
+ At your option, you may instead copy, distribute and/or modify
+ this document under the terms of the \alert{GNU Free Documentation
+ License, Version 1.3 or any later version} published by the Free
+ Software Foundation; with no Invariant Sections, no Front-Cover
+ Texts, and no Back-Cover Texts. A copy of the license is
+ available at \url{http://www.gnu.org/licenses/gfdl.html}.
+ \\[2.0mm]
+ % Give a link to the 'Transparent Copy', as per Section 3 of the GFDL.
+ The source of this document is available from
+ \url{http://git.sv.gnu.org/cgit/guix/maintenance.git}.
+ }
+ \end{textblock}
+\end{frame}
+
+\end{document}
+
+% Local Variables:
+% coding: utf-8
+% comment-start: "%"
+% comment-end: ""
+% ispell-local-dictionary: "american"
+% compile-command: "pdflatex talk.tex"
+% End: