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Nils Freydank 2 years ago
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  1. 27
      .gitignore
  2. 19
      COPYING-MIT
  3. 19
      Dockerfile
  4. 43
      README.rst
  5. 20
      prepare-and-build.sh

27
.gitignore vendored

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# ---> Vim
# Swap
[._]*.s[a-v][a-z]
[._]*.sw[a-p]
[._]s[a-rt-v][a-z]
[._]ss[a-gi-z]
[._]sw[a-p]
# Session
Session.vim
# Temporary
.netrwhist
*~
# Auto-generated tag files
tags
# Persistent undo
[._]*.un~
# ---> Kate
# Swap Files #
.*.kate-swp
.swp.*
# ---> Local stuff
# Intermediate Tar archives
*.tar*

19
COPYING-MIT

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Copyright 2020 Nils Freydank
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

19
Dockerfile

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#
# Dockerfile to create an alpinelinux container.
# Copyright (C) 2020 by Nils Freydank <nils+container@holgersson.xyz>,
# published under the terms of the MIT license.
#
# Note: This copyright and license only affects the docker/podman file itself.
# The installed softwarecomponents have their own respective licsenses!
FROM scratch as builder
ENV GLIBC_VERSION="2.31-r0"
ENV ALPINE_VERSION="3.11.6"
ENV ALPINE_ARCH="x86_64"
# Copy the rootfs from outside.
ADD alpine-minirootfs-${ALPINE_VERSION}-${ALPINE_ARCH}.tar.gz /
# Create the actual image without the env/version layers.
FROM scratch
MAINTAINER Nils Freydank "nils+container@holgersson.xyz"
COPY --from=builder . .

43
README.rst

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alpine-x86_64
=============
This repository contains a dockerfile to create a most trustworthy base image
for further containers. The distribution `Alpine Linux`_ is used inside.
Note that alpine linux uses the `musl libc`_, which is faster and far smaller
than the typically used glibc, but also far less supported by vendors shipping
closed source programms as pre compiled binaries.
Usage
-----
To build this container as a base for other images get sure wget, gnupg and
`podman`_/libpod are installed and set up. Then run the setup script
.. code:: shell
./prepare-and-build.sh
which will generate a container named alpine-${ARCH}:${VERSION}, e.g.
alpine-x86_64 (with default parameters). Note that you can overwrite the
params directly when calling the script, e.g. as
.. code:: shell
ARCH="x86" prepare-and-build.sh
for a 32bit installation.
Author and Copying
==================
This repository is authored by `Nils Freydank`_. You can use, modify and
share this code under the terms of the MIT license (see the file
COPYING-MIT for details).
.. links
.. _`Alpine Linux`: https://alpinelinux.org/about/
.. _`musl libc`: https://musl.libc.org/
.. _`podman`: https://github.com/containers/libpod/
.. _`Nils Freydank`: mailto:nils+container@holgersson.xyz?Subject:\ alpine\ podman

20
prepare-and-build.sh

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#!/usr/bin/env bash
#
# Shell script to fetch and verify alpine
# Copyright 2020 by Nils Freydank <nils+container@holgersson.xyz>,
# published according to terms of the MIT license.
set -xeu
PATH="/usr/bin:/usr/sbin/:/bin/:/usr/bin"
VERSION="${VERSION:-3.11.6}"
ARCH="${ARCH:-x86_64}"
# Fetch!
wget -c http://dl-cdn.alpinelinux.org/alpine/v${VERSION%.[0-9]*}/releases/${ARCH}/alpine-minirootfs-${VERSION}-${ARCH}.tar.gz{,.asc}
# Verify!
gpg --verify alpine-minirootfs-${VERSION}-${ARCH}.tar.gz{.asc,}
# Do magic!
podman build . -t alpine-${ARCH}:${VERSION}
# Cleanup!
rm -f alpine-minirootfs-${VERSION}-${ARCH}.tar.gz{.asc,}
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