Due to how we build our Docker images, we need to install some development packages during the build of the base images we use for our final builds. However, we don't actually need those packages at runtime, and we don't remove them after we've installed the things that need to be built against them.

Currently, the primary culprits are:

• python3-dev
• gcc
• musl-dev
• mariadb-dev
• postgresql-dev
• mongo-c-connector-dev

Of these, the first three can be completely removed after the pip install command we run to pull in specific python dependencies. The other three can be mostly removed, but will need the runtime libraries that were linked against to be installed. I'm fairly certain that the relevant packages are, respectively, mariadb-connector-c, postgresql-bdr-libs, and mongo-c-connector.

All of this, including the pip install command, needs to be handled as a single RUN command in base/Dockerfile.

This issue was prompted by @ilyam8 noticing a significant increase in our Docker image sizes (over 350MB) that I'm 99% certain is a result of us now pulling in mongo-c-connector-dev.

@prologic If you want to deal with this yourself that's fine, if not I'll deal with it when i get back from vacation.

Alpine have moved a dependency of nut (in edge/testing) from edge/testing to edge/main, which breaks the final install line in the current base image Dockerfile:

# Add nut dependency from alpine-edge
RUN apk --no-cache add nut --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing

This results in an error such as:

#6 [3/3] RUN apk --no-cache add nut --repository http://dl-cdn.alpinelinux....
#6 0.793 fetch http://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
#6 0.916 fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
#6 0.973 fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
#6 1.166 ERROR: unsatisfiable constraints:
#6 1.200   so:libnetsnmp.so.40 (missing):
#6 1.200     required by: nut-2.7.4-r7[so:libnetsnmp.so.40]
#6 ERROR: executor failed running [/bin/sh -c apk --no-cache add nut --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing]: runc did not terminate sucessfully

I believe a simple fix would be to list the edge/main repository on the apk command line:

# Add nut dependency from alpine-edge
RUN apk --no-cache add nut --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing --repository http://dl-cdn.alpinelinux.org/alpine/edge/main

See netdata/netdata#7354 and netdata/netdata#7325 for background.

TL;DR libuv 1 is becoming a hard dependency and some of the OS images (e.g. CentOS 6) have version 0 of this library.

See Docker Build

Looks like some upstream breaking changes.

Docker Hub's automated builder infrastructure has horrendous queue times and is not exactly user friendly to work with. The queue times have caused numerous unnecessary delays on multiple occasions.

Given this, we should move our actual build and publishing logic to GitHub Actions, as we already know that works and has good performance.