Adding kud containerized features

Issue-ID: MULTICLOUD-827
Signed-off-by: Kuralamudhan Ramakrishnan <kuralamudhan.ramakrishnan@intel.com>
Change-Id: I0205459a032c8876943e9b50e61b2c315b138af9

1 files changed, 139 insertions, 0 deletions

diff --git a/kud/hosting_providers/containerized/README.md b/kud/hosting_providers/containerized/README.md
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+# Multi cluster installation
+
+## Introduction
+
+Multi Cluster installation is an important features for production deployments.
+
+Most of the project are using the Kubernetes as undercloud orchestration. So deploying multi cluster for the multi cloud region should be maintained by Kubernetes
+
+This section explains how to deploy the Multi cluster of Kubernetes from a containerized KUD running as a Kubernetes Job.
+
+## How it works
+
+KUD installation installer is divided into two regions with args - `--install-pkg` and `--cluster <cluster-name>`
+
+### Args
+**--install-pkg** - Installs packages required to run installer script itself inside a container and kubespray packages
+
+**--cluster < cluster-name >** - Installs k8s cluster, addons and plugins and store the artifacts in the host machine
+
+### Internal Mechanism
+
+* Container image is build using the `installer --install-pkg` arg and Kubernetes job is used to install the cluster using `installer --cluster <cluster-name>`. Installer will invoke the kubespray cluster.yml, kud-addsons and plugins ansible cluster.
+
+Installer script finds the `hosts.init` for each cluster in `/opt/multi-cluster/<cluster-name>`
+
+Kubernetes jobs(a cluster per job) are used to install multiple clusters and logs of each cluster deployments are stored in the `/opt/kud/multi-cluster/<cluster-name>/logs` and artifacts are stored as follows `/opt/kud/multi-cluster/<cluster-name>/artifacts`
+
+## Quickstart Installation Guide
+
+Build the kud docker images as follows:
+
+```
+$ git clone https://github.com/onap/multicloud-k8s.git && cd multicloud-k8s
+$  docker build  --rm \
+	--build-arg http_proxy=${http_proxy} \
+	--build-arg HTTP_PROXY=${HTTP_PROXY} \
+	--build-arg https_proxy=${https_proxy} \
+	--build-arg HTTPS_PROXY=${HTTPS_PROXY} \
+	--build-arg no_proxy=${no_proxy} \
+	--build-arg NO_PROXY=${NO_PROXY} \
+	-t github.com/onap/multicloud-k8s:latest . -f build/Dockerfile
+```
+Let's create a cluster-101 and cluster-102 hosts.ini as follows
+
+```
+$ mkdir -p /opt/kud/multi-cluster/{cluster-101,cluster-102}
+```
+
+Create hosts.ini as follows in the direcotry cluster-101(c01 IP address 10.10.10.3) and cluster-102(c02 IP address 10.10.10.5)
+
+```
+/opt/kud/multi-cluster/cluster-101/hosts.ini
+[all]
+c01 ansible_ssh_host=10.10.10.5 ansible_ssh_port=22
+
+[kube-master]
+c01
+
+[kube-node]
+c01
+
+[etcd]
+c01
+
+[ovn-central]
+c01
+
+[ovn-controller]
+c01
+
+[virtlet]
+c01
+
+[k8s-cluster:children]
+kube-node
+kube-master
+```
+Do the same for the cluster-102 with c01 and IP address 10.10.10.5.
+
+Create the ssh secret for Baremetal or VM based on your deployment. and Launch the kubernetes job as follows
+```
+$ kubectl create secret generic ssh-key-secret --from-file=id_rsa=/root/.ssh/id_rsa --from-file=id_rsa.pub=/root/.ssh/id_rsa.pub
+$ CLUSTER_NAME=cluster-101
+$ cat <<EOF | kubectl create -f -
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: kud-$CLUSTER_NAME
+spec:
+  template:
+    spec:
+      hostNetwork: true
+      containers:
+        - name: kud
+          image: github.com/onap/multicloud-k8s:latest
+          imagePullPolicy: IfNotPresent
+          volumeMounts:
+          - name: multi-cluster
+            mountPath: /opt/kud/multi-cluster
+          - name: secret-volume
+            mountPath: "/.ssh"
+          command: ["/bin/sh","-c"]
+          args: ["cp -r /.ssh /root/; chmod -R 600 /root/.ssh; ./installer --cluster $CLUSTER_NAME"]
+          securityContext:
+            privileged: true
+      volumes:
+      - name: multi-cluster
+        hostPath:
+          path: /opt/kud/multi-cluster
+      - name: secret-volume
+        secret:
+          secretName: ssh-key-secret
+      restartPolicy: Never
+  backoffLimit: 0
+
+EOF
+```
+
+Multi - cluster information from the host machine;
+
+```
+$ kubectl --kubeconfig=/opt/kud/multi-cluster/cluster-101/artifacts/admin.conf cluster-info
+Kubernetes master is running at https://192.168.121.2:6443
+coredns is running at https://192.168.121.2:6443/api/v1/namespaces/kube-system/services/coredns:dns/proxy
+kubernetes-dashboard is running at https://192.168.121.2:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy
+
+To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
+$ kubectl --kubeconfig=/opt/kud/multi-cluster/cluster-102/artifacts/admin.conf cluster-info
+Kubernetes master is running at https://192.168.121.6:6443
+coredns is running at https://192.168.121.6:6443/api/v1/namespaces/kube-system/services/coredns:dns/proxy
+kubernetes-dashboard is running at https://192.168.121.6:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy
+
+To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
+```
+
+
+## License
+
+Apache-2.0