doc: add OWNERS and redhat/ directory

These OWNERS files are needed for the openshift-ci bot to allow members
of the Ceph-CSI team to approve PRs and merge them automatically.

The redhat/ directory contains a README.md with details about the
downstream procedures. A Container file has been added as well, which
will allow running builds on the OpenShift CI for the PRs that are
created.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

redhat/Containerfile

@@ -0,0 +1,43 @@
+# This Containerfile is used by openshift-ci to build the image, and push it to
+# quay.io/ocs-dev/ceph-csi
+#
+# This image is based on the latest stable Ceph version, which uses CentOS.
+#
+# Note that other tests run on the latest Fedora release. That makes the binary
+# that gets build not necessary compatible with the Ceph version on other
+# distributions. Hence the need to rebuild the executable on the OS that will
+# be used as deployment image.
+#
+# Ideally we use a base container that is very closely like the Red Hat Ceph
+# Storage (RHCS) product. Unfortunately those container images are not publicly
+# available, so we will use the latest Ceph version that is available. If we
+# settle on a particular Ceph version, we might be missing out on backports
+# that the RHCS product contains (and compiling might fail).
+
+FROM docker.io/ceph/daemon-base:latest AS builder
+
+ENV GOPATH=/go
+
+# install dependencies
+RUN dnf -y install \
+        git \
+        golang \
+        make \
+        librados-devel \
+        librbd-devel \
+    && dnf -y update \
+    && dnf clean all \
+    && true
+
+# compile and link the executable
+COPY . /go/src/github.com/ceph/ceph-csi
+RUN cd /go/src/github.com/ceph/ceph-csi && make
+
+# final container to use in deployments
+FROM docker.io/ceph/daemon-base:latest
+
+COPY --from=builder /go/src/github.com/ceph/ceph-csi/_output/cephcsi /usr/local/bin/cephcsi
+
+RUN chmod +x /usr/local/bin/cephcsi
+
+ENTRYPOINT ["/usr/local/bin/cephcsi"]