Re: Write content to file from Dockerfile and/or any other method

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On Fri, 29 Jan 2016 06:31, Keith Keller <kkeller@...> wrote:
On 2016-01-29, reynierpm@xxxxxxxxx <reynierpm@xxxxxxxxx> wrote:

I am building a Dockerfile and I am setting up MariaDB repos as follow:

This question is probably way offtopic for a CentOS mailing list.

# Setup MariaDB repos
RUN touch /etc/yum.repos.d/MariaDB.repo

What's the right way to do this? The one below?

echo "[mariadb]" >> "/etc/yum.repos.d/MariaDB.repo"
echo "name = MariaDB" >> "/etc/yum.repos.d/MariaDB.repo"
echo "baseurl = http://yum.mariadb.org/5.5/centos6-amd64"; >>
"/etc/yum.repos.d/MariaDB.repo"
echo "gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB"; >>
"/etc/yum.repos.d/MariaDB.repo"
echo "gpgcheck=1" >> "/etc/yum.repos.d/MariaDB.repo"

You probably want to do a COPY.  The Docker docs cover Dockerfile syntax
in detail:

https://docs.docker.com/engine/reference/builder/#copy

Yep, this is a much better way to do such things.
create the 'MariaDB.repo' in the direstory the 'Dockerfile' resides in,
and use the following line in the Dockerfile:

[code]
COPY MariaDB.repo /etc/yum.repos.d/MariaDB.repo
[/code]

much better that way, for further tips on Dockerfile writing,
I'll point you to the offical site "docs.docker.com", esp:

 https://docs.docker.com/engine/articles/dockerfile_best-practices/

Have a nice weekend,
 - Yamaban.
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