BUILD (Images from a Dockerfile) - Supercomputing. Hands On. With GUI and Performance measurement

If you are not able to find a suitable image on Docker Hub there is only one option left. You have to make your own image corresponding to your wishes: CPU type and OS.

Making an image is a daunting task. Make sure you have plenty of time available for building and testing.

I want to build a copy of the MariaDB SQL server version 10.3 I was only able to find version available for the AMD processor. RaspBerry PI is running an arm32v7, arm or armhf.

Problem is that the manifest is not unambiguously.

So I decided to start with the left over from other builds:

https://github.com/docker-library/mariadb/

Creating good working conditions:

mkdir mariadb10.3
cd mariadb10.3

Save the Dockerfile and docker-entrypoint.sh in the new directory.

Go to the directory in terminal mode.

$ docker build --tag jorgenlarsen/mariadb10.3:rpi . 

(Remember "." which means "here" in linux language)

As default docker build looks for a Dockerfile.

And errors are rolling in. Step by step the errors are fixed.

Corrections made:

The Dockerfile is for Ubuntu. So we change Dockerfile for Debian
Current latest release according to Debian repository
- (HINT: Use Synaptic to get it)
Fixing an absolute path

And the result looks like this:


# vim:set ft=dockerfile:
FROM debian:latest

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r mysql && useradd -r -g mysql mysql

# https://bugs.debian.org/830696 (apt uses gpgv by default in newer releases, rather than gpg)
RUN set -ex; \
	apt-get update; \
	if ! which gpg; then \
		apt-get install -y --no-install-recommends gnupg; \
	fi; \
	if ! gpg --version | grep -q '^gpg (GnuPG) 1\.'; then \
# Ubuntu includes "gnupg" (not "gnupg2", but still 2.x), but not dirmngr, and gnupg 2.x requires dirmngr
# so, if we're not running gnupg 1.x, explicitly install dirmngr too
		apt-get install -y --no-install-recommends dirmngr; \
	fi; \
	rm -rf /var/lib/apt/lists/*

# add gosu for easy step-down from root
# https://github.com/tianon/gosu/releases
ENV GOSU_VERSION 1.12
RUN set -eux; \
	savedAptMark="$(apt-mark showmanual)"; \
	apt-get update; \
	apt-get install -y --no-install-recommends ca-certificates wget; \
	rm -rf /var/lib/apt/lists/*; \
	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
	wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
	export GNUPGHOME="$(mktemp -d)"; \
	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
	gpgconf --kill all; \
	rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \
	apt-mark auto '.*' > /dev/null; \
	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
	chmod +x /usr/local/bin/gosu; \
	gosu --version; \
	gosu nobody true

RUN mkdir /docker-entrypoint-initdb.d

# install "pwgen" for randomizing passwords
# install "tzdata" for /usr/share/zoneinfo/
# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
RUN set -ex; \
	apt-get update; \
	apt-get install -y --no-install-recommends \
		pwgen \
		tzdata \
		xz-utils \
	; \
	rm -rf /var/lib/apt/lists/*

ENV GPG_KEYS \
# pub   rsa4096 2016-03-30 [SC]
#         177F 4010 FE56 CA33 3630  0305 F165 6F24 C74C D1D8
# uid           [ unknown] MariaDB Signing Key <signing-key@mariadb.org>
# sub   rsa4096 2016-03-30 [E]
	177F4010FE56CA3336300305F1656F24C74CD1D8
RUN set -ex; \
	export GNUPGHOME="$(mktemp -d)"; \
	for key in $GPG_KEYS; do \
		gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	done; \
	gpg --batch --export $GPG_KEYS > /etc/apt/trusted.gpg.d/mariadb.gpg; \
	command -v gpgconf > /dev/null && gpgconf --kill all || :; \
	rm -r "$GNUPGHOME"; \
	apt-key list

# bashbrew-architectures: amd64 arm64v8 ppc64le
ENV MARIADB_MAJOR 10.3
ENV MARIADB_VERSION 1:10.3.23-0+deb10u1
# release-status:Stable
# (https://downloads.mariadb.org/mariadb/+releases/)

RUN set -e;\
	echo "deb http://ftp.osuosl.org/pub/mariadb/repo/$MARIADB_MAJOR/ubuntu focal main" > /etc/apt/sources.list.d/mariadb.list; \
	{ \
		echo 'Package: *'; \
		echo 'Pin: release o=MariaDB'; \
		echo 'Pin-Priority: 999'; \
	} > /etc/apt/preferences.d/mariadb
# add repository pinning to make sure dependencies from this MariaDB repo are preferred over Debian dependencies
#  libmariadbclient18 : Depends: libmysqlclient18 (= 5.5.42+maria-1~wheezy) but 5.5.43-0+deb7u1 is to be installed

# the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
# also, we set debconf keys to make APT a little quieter
RUN set -ex; \
	{ \
		echo "mariadb-server-$MARIADB_MAJOR" mysql-server/root_password password 'unused'; \
		echo "mariadb-server-$MARIADB_MAJOR" mysql-server/root_password_again password 'unused'; \
	} | debconf-set-selections; \
	apt-get update; \
	apt-get install -y \
		"mariadb-server=$MARIADB_VERSION" \
# mariadb-backup is installed at the same time so that `mysql-common` is only installed once from just mariadb repos
		mariadb-backup \
		socat \
	; \
	rm -rf /var/lib/apt/lists/*; \
# purge and re-create /var/lib/mysql with appropriate ownership
	rm -rf /var/lib/mysql; \
	mkdir -p /var/lib/mysql /var/run/mysqld; \
	chown -R mysql:mysql /var/lib/mysql /var/run/mysqld; \
# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
	chmod 777 /var/run/mysqld; \
# comment out a few problematic configuration values
	find /etc/mysql/ -name '*.cnf' -print0 \
		| xargs -0 grep -lZE '^(bind-address|log|user\s)' \
		| xargs -rt -0 sed -Ei 's/^(bind-address|log|user\s)/#&/'; \
# don't reverse lookup hostnames, they are usually another container
	echo '[mysqld]\nskip-host-cache\nskip-name-resolve' > /etc/mysql/conf.d/docker.cnf

VOLUME /var/lib/mysql

COPY docker-entrypoint.sh /usr/local/bin/
RUN ln -s usr/local/bin/docker-entrypoint.sh / # backwards compat
ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

EXPOSE 3306
CMD ["mysqld"]

No changes required for docker-entrypoint.sh

Check either in Portainer or via the terminal:

$ docker images
REPOSITORY                 TAG                 IMAGE ID            CREATED             SIZE
netdata/netdata            <none>              a6e33681d79d        15 hours ago        290MB
netdata/netdata            latest              ff4918bf7242        38 hours ago        290MB
jorgenlarsen/mariadb10.3   rpi                 09f38af10d8f        2 weeks ago         316MB
portainer/portainer-ce     latest              5526251cc61f        7 weeks ago         163MB

The official Docker Build reference:

https://docs.docker.com/engine/reference/commandline/build/

If you want to get really confused…..

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