From d505335220127692d8c85e00f397e387fd078123 Mon Sep 17 00:00:00 2001 From: Egor Tensin Date: Sun, 26 Jan 2020 19:40:26 +0300 Subject: add more comments on Docker magic --- .travis.yml | 22 ++++++++++++++++++++-- fr24feed/Dockerfile | 1 + 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/.travis.yml b/.travis.yml index 61555a5..4cfdeb1 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,7 +1,25 @@ -# I used this guide to set up multiarch builds: -# https://mirailabs.io/blog/multiarch-docker-with-buildx/ +# I used a guide to set up multiarch builds [1]. # I don't understand it completely at the moment, but whatever. +# The goal is to have a single multiarch repo on Docker Hub for each of the +# services. +# The approach is to use Docker's new BuildKit builder + the buildx command +# line plugin. +# +# Other possibilities are: +# * use QEMU + multiarch base images directly [2][3], and create a manifest +# file manually, +# * build natively on multiple architectures (not sure how to combine them in +# a single manifest then though). +# +# The disadvantages of the approach taken are: +# * newer Docker version is required, +# * docker-compose doesn't seem to support that method natively. +# +# [1]: https://mirailabs.io/blog/multiarch-docker-with-buildx/ +# [2]: https://lobradov.github.io/Building-docker-multiarch-images/ +# [3]: https://ownyourbits.com/2018/06/27/running-and-building-arm-docker-containers-in-x86/ + # TODO: Docker Hub automated builds instead of Travis? # TODO: docker-compose instead of docker buildx? diff --git a/fr24feed/Dockerfile b/fr24feed/Dockerfile index 470f0fd..4b445f3 100644 --- a/fr24feed/Dockerfile +++ b/fr24feed/Dockerfile @@ -4,6 +4,7 @@ FROM debian:stretch-slim AS base # Those are weird hacks, but the alternative (using the apt repository) was # unsuitable (no systemctl, etc.). +# Using BuildKit is required for this to work (it exposes TARGETARCH). # The latest versions of the fr24feed binary for i386/x86_64/armhf as of # 2020-01-26, according to https://www.flightradar24.com/share-your-data. -- cgit v1.2.3