support ppc64le architecture

[grooverdan]

Upstream support ppc64le packages for 10.0+ releases on Jessie on the same repo urls:

https://downloads.mariadb.org/mariadb/repositories/#distro=Debian&distro_release=jessie--jessie&version=10.2

A gosu implementation does exist.

Unfortunately percona's repository and percona-xtrabackup-24 doesn't exist for ppc64le however a docker image without this would still be functional.
Proof of concept:

$ uname -m
ppc64le
$ git diff
diff --git a/10.3/Dockerfile b/10.3/Dockerfile
index 07da03d..9b98c1a 100644
--- a/10.3/Dockerfile
+++ b/10.3/Dockerfile
@@ -4,6 +4,10 @@ FROM debian:jessie
 # 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

+#
+RUN [ -n "$http_proxy" ] && echo Acquire::http::proxy '"'$http_proxy'";' >> /etc/apt/apt.conf.d/proxy || :
+RUN [ -n "$https_proxy" ] && echo Acquire::https::proxy '"'$https_proxy'";' >> /etc/apt/apt.conf.d/proxy || :
+
 # add gosu for easy step-down from root
 ENV GOSU_VERSION 1.10
 RUN set -ex; \
@@ -65,7 +69,7 @@ RUN set -ex; \
        apt-key list

 # add Percona's repo for xtrabackup (which is useful for Galera)
-RUN echo "deb https://repo.percona.com/apt jessie main" > /etc/apt/sources.list.d/percona.list \
+RUN echo "deb [arch=amd64,i386] https://repo.percona.com/apt jessie main" > /etc/apt/sources.list.d/percona.list \
        && { \
                echo 'Package: *'; \
                echo 'Pin: release o=Percona Development Team'; \
@@ -94,7 +98,6 @@ RUN { \
        && apt-get install -y \
                "mariadb-server=$MARIADB_VERSION" \
 # percona-xtrabackup is installed at the same time so that `mysql-common` is only installed once from just mariadb repos
-               percona-xtrabackup-24 \
                socat \
        && rm -rf /var/lib/apt/lists/* \
 # comment out any "user" entires in the MySQL config ("docker-entrypoint.sh" or "--user" will handle user switching)
$ docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -f 10.3/Dockerfile  10.3
...
2018-03-19  5:28:05 0 [Note] /usr/sbin/mysqld (mysqld 10.3.5-MariaDB-10.3.5+maria~jessie) starting as process 852 ...
2018-03-19  5:28:05 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-03-19  5:28:05 0 [Note] InnoDB: Uses event mutexes
2018-03-19  5:28:05 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
2018-03-19  5:28:05 0 [Note] InnoDB: Using Linux native AIO
2018-03-19  5:28:05 0 [Note] InnoDB: Number of pools: 1
2018-03-19  5:28:05 0 [Note] InnoDB: Using POWER8 crc32 instructions
...
Removing intermediate container c899a2389061
 ---> a85eb6a18422
Successfully built a85eb6a18422

$ docker exec -ti d71885600642  /usr/bin/mysql -h"127.0.0.1" -P"3306" -uroot -p"my-very-secret-pw" -e "select @@version"
+------------------------------------+
| @@version                          |
+------------------------------------+
| 10.3.5-MariaDB-10.3.5+maria~jessie |
+------------------------------------+

[grooverdan]

Dockerfile compatibility solved in #155

mariadb-10.1+ has mariadb-backup packages (#111) for jessie and stretch on ppc64le and others.

[grooverdan]

Any feedback? From the response in #125 official packages seem to be the requirement to add a supported architecture. PR #155 makes it compatible by removing a minor component for non-x86_64/i386.

[grooverdan]

Added travis linux-ppc64le tests to #155 to show build is ppc64le compatible (without percona-xtrabackup)
https://travis-ci.org/docker-library/mariadb/builds/373285267

[grooverdan]

Mariabackup is installed on linux-ppc64le based on #158 too - https://travis-ci.org/grooverdan/mariadb/builds/373288626

[grooverdan]

closed via #184