script: add kubejacker script

For those with running k8s/Rook environments, that want
to inject newly built binaries from their development
tree into their kubernetes environment.

Signed-off-by: John Spray <john.spray@redhat.com>

diff --git a/src/script/kubejacker/Dockerfile b/src/script/kubejacker/Dockerfile
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+
+from BASEIMAGE
+
+# Some apt-get commands fail in docker builds because they try
+# and do interactive prompts
+ENV TERM linux
+
+# Baseline rook images may be from before the `rook` ceph-mgr module,
+# so let's install the dependencies of that
+RUN yum install -y python-pip
+RUN pip install kubernetes==6.0.0
+
+# New RGW dependency since luminous
+RUN yum install -y liboath
+
+# For the dashboard, if the rook images are pre-Mimic
+RUN yum install -y python-bcrypt librdmacm
+
+ADD bin.tar.gz /usr/bin/
+ADD lib.tar.gz /usr/lib64/
+
+# Assume developer is using default paths (i.e. /usr/local), so
+# build binaries will be looking for libs there.
+ADD eclib.tar.gz /usr/local/lib64/ceph/erasure-code/
+ADD mgr_plugins.tar.gz /usr/local/lib64/ceph/mgr
+

diff --git a/src/script/kubejacker/README.rst b/src/script/kubejacker/README.rst
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+
+This tool is for developers who want to run their WIP Ceph code
+inside a Rook/kubernetes cluster without waiting for packages
+to build.
+
+It simply takes a Rook image, overlays all the binaries from your
+built Ceph tree into it, and spits out a new Rook image.  This will
+only work as long as your build environment is sufficiently similar
+(in terms of dependencies etc) to the version of Ceph that was
+originally in the images you're injecting into.
+

diff --git a/src/script/kubejacker/kubejacker.sh b/src/script/kubejacker/kubejacker.sh
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+#!/bin/bash
+
+set -x
+set -e
+SCRIPT=$(readlink -f "$0")
+SCRIPTPATH=$(dirname "$SCRIPT")
+
+# Run me from your build dir!  I look for binaries in bin/, lib/ etc.
+BUILDPATH=$(pwd)
+
+# PREREQUISITE: a built rook image to use as a base, either self built
+# or from dockerhub.  If you ran "make" in your rook source checkout
+# you'll have one like build-<hash>/rook-amd64
+DEFAULT_BASEIMAGE="`docker image ls | grep ceph-amd64 | cut -d " " -f 1`"
+BASEIMAGE="${BASEIMAGE:-$DEFAULT_BASEIMAGE}"
+
+# PREREQUISITE: a repo that you can push to.  You are probably running
+# a local docker registry that your kubelet nodes also have access to.
+if [ -z "$REPO" ]
+then
+    echo "ERROR: no \$REPO set!"
+    echo "Run a docker repository and set REPO to <hostname>:<port>"
+    exit -1
+fi
+
+# The output image name: this should match whatever is configured as
+# the image name in your Rook cluster CRD object.
+IMAGE=rook/ceph
+TAG=$(git rev-parse --short HEAD)
+
+# The namespace where ceph containers are running in your
+# test cluster: used for bouncing the containers.
+NAMESPACE=rook-ceph
+
+mkdir -p kubejacker
+cp $SCRIPTPATH/Dockerfile kubejacker
+sed -i s@BASEIMAGE@$BASEIMAGE@ kubejacker/Dockerfile
+
+# TODO: let user specify which daemon they're interested
+# in -- doing all bins all the time is too slow and bloaty
+BINS="ceph-mgr ceph-mon ceph-mds ceph-osd rados radosgw-admin radosgw"
+pushd bin
+strip $BINS  #TODO: make stripping optional
+tar czf $BUILDPATH/kubejacker/bin.tar.gz $BINS
+popd
+
+# We need ceph-common to support the binaries
+# We need librados/rbd to support mgr modules
+# that import the python bindings
+LIBS="libceph-common.so.0 libceph-common.so librados.so.2 librados.so librados.so.2.0.0 librbd.so librbd.so.1 librbd.so.1.12.0"
+pushd lib
+strip $LIBS  #TODO: make stripping optional
+tar czf $BUILDPATH/kubejacker/lib.tar.gz $LIBS
+popd
+
+pushd ../src/pybind/mgr
+find ./ -name "*.pyc" -exec rm -f {} \;
+# Exclude node_modules because it's the huge sources in dashboard/frontend
+tar --exclude=node_modules --exclude=tests --exclude-backups -czf $BUILDPATH/kubejacker/mgr_plugins.tar.gz *
+popd
+
+ECLIBS="libec_*.so"
+pushd lib
+strip $ECLIBS  #TODO: make stripping optional
+tar czf $BUILDPATH/kubejacker/eclib.tar.gz $ECLIBS
+popd
+
+
+pushd kubejacker
+docker build -t $REPO/$IMAGE:$TAG .
+popd
+
+# Push the image to the repository
+docker tag $REPO/$IMAGE:$TAG $REPO/$IMAGE:latest
+docker push $REPO/$IMAGE:latest
+docker push $REPO/$IMAGE:$TAG 
+
+# Finally, bounce the containers to pick up the new image
+kubectl -n $NAMESPACE delete pod -l app=rook-ceph-mds
+kubectl -n $NAMESPACE delete pod -l app=rook-ceph-mgr
+kubectl -n $NAMESPACE delete pod -l app=rook-ceph-mon