ci/openshift-ci: Enable openshift-ci

Enable openshift-ci on runtime repository.

Fixes: github.com/kata-containers/tests#2527
Depends-on: github.com/kata-containers/tests#2802

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>

.ci/openshift-ci/README.md

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+# OpenShift CI files
+
+This directory contain scripts and files used by the openshift-ci operator to test kata. For further details read this [README](https://github.com/kata-containers/tests/tree/master/.ci/openshift-ci/README.md) file.

.ci/openshift-ci/build.sh

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+#!/bin/bash
+#
+# Copyright (c) 2020 Red Hat Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Build and install kata-containers under <repository>/_out/build_install
+#
+
+set -e
+
+export GOPATH=${GOPATH:-${HOME}/go}
+cidir=$(dirname "$0")/..
+source "${cidir}/lib.sh"
+
+export kata_repo=$(git config --get remote.origin.url | sed -e 's#http\(s\)*://##')
+
+mkdir -p $cidir/../_out/build_install
+destdir=$(realpath $cidir/../_out/build_install)
+
+clone_tests_repo
+pushd "${tests_repo_dir}"
+# Resolve the kata-container repositories. It relies on branch and
+# kata_repo variables.
+export branch=master
+.ci/resolve-kata-dependencies.sh
+.ci/openshift-ci/buildall_install.sh $destdir
+popd

.ci/openshift-ci/images/Dockerfile

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+# Copyright (c) 2020 Red Hat Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Build the image which wraps the kata-containers installation along with the
+# install script. It is used on a daemonset to deploy kata on OpenShift.
+#
+FROM centos:8
+
+RUN yum install -y rsync
+
+# Load the installation files.
+COPY ./_out ./_out
+
+COPY ./entrypoint.sh /usr/bin
+
+ENTRYPOINT /usr/bin/entrypoint.sh

.ci/openshift-ci/images/entrypoint.sh

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+#!/bin/bash
+#
+# Copyright (c) 2020 Red Hat Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Synchronize the kata-containers installation with in the host filesystem.
+#
+set -x
+
+install_status=1
+
+SRC="${PWD}/_out/build_install"
+
+# Expect the host filesystem to be mounted in following path.
+HOST_MOUNT=/host
+
+# Some files are copied over /usr which on Red Hat CoreOS (rhcos) is mounted
+# read-only by default. So re-mount it as read-write, otherwise files won't
+# get copied.
+mount -o remount,rw $HOST_MOUNT/usr
+
+# The host's '/opt' and '/usr/local' are symlinks to, respectively, '/var/opt'
+# and '/var/usrlocal'. Adjust the installation files accordingly.
+#
+cd $SRC
+if [ -d 'opt' ]; then
+	mkdir -p var
+	mv opt var
+fi
+
+if [ -d "usr/local" ]; then
+	mkdir -p var
+	mv usr/local var/usrlocal
+fi
+
+# Copy the installation over the host filesystem.
+rsync -a * $HOST_MOUNT
+
+# Ensure the runtime binary is searcheable via PATH. Notice it expects that
+# kata has been built with PREFIX=/opt/kata.
+#
+chroot $HOST_MOUNT ln -s /opt/kata/bin/containerd-shim-kata-v2 /var/usrlocal/bin/
+
+# Check the installation is good (or not).
+chroot $HOST_MOUNT /opt/kata/bin/kata-runtime kata-check
+install_status=$?
+
+# Sending a termination message. Can be used by an orchestrator that will
+# look into this file to check the installation has finished and is good.
+#
+echo "$install_status" >> /tmp/kata_install_status
+
+# By using it in an openshift daemonset it should spin forever until an
+# orchestrator kills it.
+#
+while true; do sleep 600; done