Lab - Roll Dice

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In an attempt at nostalgia, we are going to once again create an S2I builder, this time for a Fortran app. Yes, Fortran. The objective is to make our little chat program a bit more interesting.

Step 1 - Create the S2I Project

cd ~
s2i create fortran-s2i fortran-s2i

Step 2 - Edit the Dockerfile

cd ~
cat /dev/null > ~/fortran-s2i/Dockerfile
vi ~/fortran-s2i/Dockerfile

Copy the following text and paste it in to the editor.

# fortran-s2i
FROM openshift/base-centos7

LABEL maintainer="Kenneth Evensen <kdevensen@gmail.com>"

ENV BUILDER_VERSION 1.0

LABEL io.k8s.description="Platform for building Fortran apps" \
      io.k8s.display-name="builder 1.0.0" \
      io.openshift.tags="fortran"


RUN yum install -y gcc-gfortran && \
    yum clean all && \
    rm -rf /var/cache/yum/*

COPY ./s2i/bin/ /usr/libexec/s2i

RUN chown -R 1001:1001 /opt/app-root

USER 1001

CMD ["/usr/libexec/s2i/usage"]

To exit vi:

shift+z

shift+z

Step 3 - Edit the Assemble Script

cat /dev/null > ~/fortran-s2i/s2i/bin/assemble
vi ~/fortran-s2i/s2i/bin/assemble

Copy the following into the editor.

#!/bin/bash -e

echo "---> Installing application source..."
cp -Rf /tmp/src/. ./

echo "---> Building application from source..."
gfortran app.f90 -o /opt/app-root/fortran-app

To exit vi:

shift+z

shift+z

Step 4 - Edit the Run Script

cat /dev/null > ~/fortran-s2i/s2i/bin/run
vi ~/fortran-s2i/s2i/bin/run

Copy the following into the editor.

#!/bin/bash -e
exec /opt/app-root/fortran-app $ARGS

To exit vi:

shift+z

shift+z

Step 5 - Enusre You are Still in the Gochat-s2i Porject

In the Wetty terminal, change to the gochat-s2i-userYOUR# project space

oc project gochat-s2i-userYOUR#

Step 6 - Create the Fortran S2I Builder Image

Create a new build for the Fortran S2I builder image

oc new-build fortran-s2i/ --to=fortran-s2i

Start the new build for the Fortran S2I builder image

oc start-build fortran-s2i --from-dir=fortran-s2i/

Step 7 - Create the Fortran-Dice Container from Source

oc new-build https://github.com/kevensen/fortran-dice.git --image-stream=fortran-s2i --name=dice --allow-missing-imagestream-tags

Step 8 - Roll Some Dice

In the chat window, try:

//roll

or

//roll-dice2-sides6


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