Added Installation guide for CDS

Change-Id: I5f46585f0d83e171b991c63a421cd99634f28098
Issue-ID: CCSDK-1221
Signed-off-by: Ezhilarasi <ezhrajam@in.ibm.com>

diff --git a/docs/installation.rst b/docs/installation.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright (C) 2019 IBM.
+
+Installation
+============
+
+ONAP is meant to be deployed within a Kubernetes environment. Hence, the de-facto way to deploy CDS is through Kubernetes.
+
+ONAP also package Kubernetes manifest as Chart, using Helm.
+
+Prerequisite
+============
+
+https://docs.onap.org/en/latest/guides/onap-developer/settingup/index.html
+
+Setup local Helm
+================
+
+helm repo
+
+* helm serve &
+* helm repo add local http://127.0.0.1:8879
+
+Get the chart
+=============
+
+Make sure to checkout the release to use, by replacing $release-tag in bellow command
+
+git clone https://gerrit.onap.org/r/oom
+git checkout tags/$release-tag
+cd oom/kubernetes
+make cds
+
+Install CDS
+===========
+
+helm install --name cds cds
+
+Result
+======
+
+$ kubectl get all --selector=release=cds
+NAME                                             READY     STATUS    RESTARTS   AGE
+pod/cds-blueprints-processor-54f758d69f-p98c2    0/1       Running   1          2m
+pod/cds-cds-6bd674dc77-4gtdf                     1/1       Running   0          2m
+pod/cds-cds-db-0                                 1/1       Running   0          2m
+pod/cds-controller-blueprints-545bbf98cf-zwjfc   1/1       Running   0          2m
+NAME                            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)             AGE
+service/blueprints-processor    ClusterIP   10.43.139.9     <none>        8080/TCP,9111/TCP   2m
+service/cds                     NodePort    10.43.254.69    <none>        3000:30397/TCP      2m
+service/cds-db                  ClusterIP   None            <none>        3306/TCP            2m
+service/controller-blueprints   ClusterIP   10.43.207.152   <none>        8080/TCP            2m
+NAME                                        DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
+deployment.apps/cds-blueprints-processor    1         1         1            0           2m
+deployment.apps/cds-cds                     1         1         1            1           2m
+deployment.apps/cds-controller-blueprints   1         1         1            1           2m
+NAME                                                   DESIRED   CURRENT   READY     AGE
+replicaset.apps/cds-blueprints-processor-54f758d69f    1         1         0         2m
+replicaset.apps/cds-cds-6bd674dc77                     1         1         1         2m
+replicaset.apps/cds-controller-blueprints-545bbf98cf   1         1         1         2m
+NAME                          DESIRED   CURRENT   AGE
+statefulset.apps/cds-cds-db   1         1         2m
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