ElectricBrain | Docker Container Dev

What is Docker? https://en.wikipedia.org/wiki/Docker_(software)

Docker is used here extensively for deployment of more or less everything loaded on the cluster.

Development is carried out either on a) physical target hardware or b) virtualized machines (Virtualized as in hardware virtualized). In the case of hardware virtualized machines, docker is loaded in and then builds take place.

Hardware virtualization is done with either a) Oracle VirtualBox or b) QEMU.

Machines are all connected to a common repository holding everything needed to build.

Top level view of supported container build directories:

drwxr-xr-x 2 root root 0 Apr 12 2018 f25arm drwxr-xr-x 2 root root 0 Nov 29 22:10 f25x86 drwxr-xr-x 2 root root 0 Sep 13 2017 f26x86 drwxr-xr-x 2 root root 0 Apr 15 2018 f27arm32 drwxr-xr-x 2 root root 0 Apr 12 2018 f27arm64 drwxr-xr-x 2 root root 0 Jun 13 2018 f27x86 drwxr-xr-x 2 root root 0 Dec 19 15:01 f29arm32 drwxr-xr-x 2 root root 0 Jan 16 08:02 f29arm64 drwxr-xr-x 2 root root 0 Nov 26 08:47 f29x86 drwxr-xr-x 2 root root 0 Apr 6 2017 include drwxr-xr-x 2 root root 0 Jul 29 2017 MacOS drwxr-xr-x 2 root root 0 Jan 13 2018 monero drwxr-xr-x 2 root root 0 Oct 1 12:36 oel74 drwxr-xr-x 2 root root 0 Mar 7 2017 registry

Installing docker-ce on Fedora 31 arm64: https://linuxconfig.org/how-to-install-docker-on-fedora-31

In general docker containers created here tend to be machine images, meaning they contain a complete copy of the operating system. Therefore (in theory) they should run on any flavour of docker on any host (provided the CPU is compatible - and even then tricks can be used to make them go).

The build process "inherits" its base layers in a heirachical structure so that running a suite of containers generally uses common base layers, minimizing storage requirements.

Here is a tree listing to three levels deep:

. ├── f25arm │ ├── build │ │ └── context │ ├── build-all │ ├── run │ ├── z-child-f25arm-compile │ │ ├── build │ │ ├── data │ │ ├── run │ │ └── z-child-f25arm-golang │ └── z-child-f25arm-systemd │ ├── build │ ├── run │ ├── z-child-f25arm-davserver │ ├── z-child-f25arm-elasticsearch │ ├── z-child-f25arm-httpd │ ├── z-child-f25arm-mysql │ ├── z-child-f25arm-openvpn │ ├── z-child-f25arm-samba │ ├── z-child-f25arm-samba-build │ └── z-child-f25arm-squid ├── f25x86 │ ├── build │ │ └── context │ ├── run │ ├── z-child-f25x86-java │ │ ├── build │ │ ├── data │ │ ├── run │ │ ├── z-child-f25x86-eclipse │ │ ├── z-child-f25x86-sqldeveloper │ │ └── z-child-f25x86-tortoisehg │ ├── z-child-f25x86-libpst │ │ ├── build │ │ ├── data │ │ └── run │ └── z-child-f25x86-systemd │ ├── build │ ├── data │ ├── run │ ├── z-child-f25x86-lxde │ └── z-child-f25x86-sysd-java ├── f26x86 │ ├── build │ │ └── context │ ├── z-child-f26x86-kodi │ │ ├── build │ │ ├── data │ │ └── run │ ├── z-child-f26x86-lxde │ │ ├── build │ │ ├── data │ │ └── run │ └── z-child-f26x86-systemd │ ├── build │ ├── data │ └── run ├── f27arm32 │ ├── build │ │ └── context │ ├── run │ ├── z-child-f27arm32-compile │ │ ├── build │ │ ├── data │ │ ├── run │ │ └── z-child-f27arm32-golang │ └── z-child-f27arm32-httpd │ ├── build │ ├── run │ ├── z-child-f27arm32-backuppc │ ├── z-child-f27arm32-emailserver │ └── z-child-f27arm32-php ├── f27arm64 │ ├── build │ │ └── context │ ├── z-child-f27arm64-bitmonero │ │ ├── build │ │ ├── data │ │ └── run │ └── z-child-f27arm64-compile │ ├── build │ ├── data │ ├── run │ └── z-child-f27arm64-golang ├── f27x86 │ ├── build │ │ └── context │ ├── z-child-f27x86-eaglepcb │ │ ├── build │ │ ├── data │ │ └── run │ ├── z-child-f27x86-java │ │ ├── build │ │ ├── data │ │ ├── run │ │ └── z-child-f27x86-arduino-ide │ ├── z-child-f27x86-minergate │ │ ├── build │ │ ├── data │ │ └── run │ └── z-child-f27x86-systemd │ ├── build │ ├── data │ ├── run │ ├── z-child-f27x86-chrome-headless │ ├── z-child-f27x86-httpd │ ├── z-child-f27x86-java │ └── z-child-f27x86-vsftpd ├── f29arm32 │ ├── build │ │ └── context │ └── z-child-f29arm32 │ ├── build │ ├── z-child-f29arm32-httpd │ ├── z-child-f29arm32-openldap │ ├── z-child-f29arm32-openvpn-client │ └── z-child-f29arm32-openvpn-server ├── f29arm64 │ ├── build │ │ └── context │ └── z-child-f29arm64 │ ├── build │ ├── z-child-f29arm32-openldap │ ├── z-child-f29arm64-httpd │ ├── z-child-f29arm64-openvpn-client │ └── z-child-f29arm64-openvpn-server ├── f29x86 │ ├── build │ │ └── context │ └── z-child-f29x86-qemu │ ├── build │ ├── data │ └── run ├── include ├── MacOS │ └── glxgears │ ├── build │ ├── data │ └── run ├── monero ├── oel74 │ ├── z-child-odb-12201 │ │ └── build │ └── z-child-oel74-java-1.8 │ ├── build │ ├── data │ ├── run │ ├── z-child-tomcat │ └── z-child-wcc └── registry 150 directories

and for the Fedora 25 ARM(32) branch showing only the build parents which result in a docker image:

├── z-child-f25arm-compile │ └── z-child-f25arm-golang └── z-child-f25arm-systemd ├── z-child-f25arm-davserver ├── z-child-f25arm-elasticsearch ├── z-child-f25arm-httpd │ ├── z-child-f25arm-backuppc │ ├── z-child-f25arm-emailserver │ └── z-child-f25arm-php │ ├── z-child-f25arm-forms │ └── z-child-f25arm-php-mysql │ └── z-child-f25arm-websitebaker ├── z-child-f25arm-mysql ├── z-child-f25arm-openvpn ├── z-child-f25arm-samba │ └── z-child-f25arm-samba-mysite ├── z-child-f25arm-samba-build │ └── z-child-samba-ad └── z-child-f25arm-squid

The base container

The starting point for all containers in this tree style architecture is the base operating system container. It has all the basic infrastructure for a particular distribution of linux. It used to be that a minimal distribution had to be downloaded followed by the extraction of files minus the operating system drivers etc. Nowdays pretty much all distributions provide a base minimal docker container which can be used to build upon.

Step one is to locate the base container and "pull" it down:

Here is a link to the official fedora docker repo:
https://hub.docker.com/_/fedora/

docker pull arm32v7/fedora

or you can specify a particular version:

docker pull arm32v7/fedora:29