Demo using Kind Clusters

This topic describes the steps to install the KubeSlice Controller and its components using kind clusters for non-production use. To install KubeSlice on a locally configured kind cluster, use the kubeslice-cli install command.

Prerequisites

Before you begin, ensure the following prerequisites are met:

• You have installed kind to create a demo clusters. For more information, see kind.
• You have installed helm to add the KubeSlice repo. For more information, see helm Releases page.
• You have installed kubectl to access clusters. For more information, see Installing Tools.
• You have installed kubectx which is required to switch cluster contexts. For more information, see Installing Kubectx.
• You have installed Docker. For more information, see Install Docker Engine.

Install KubeSlice

The kubeslice-cli install —profile=<minimal-demo|full-demo> command creates a demo topology consisting of one controller and two worker clusters. The full-demo deploys the application on the demo slice, whereas the minimal-demo requires that an application be deployed on the demo slice.

In this demonstration, install KubeSlice on kind clusters using kubeslice-cli, using the --profile=minimal-demo option.

The kubeslice-cli install command with the --profile=minimal-demo option does the following:

1. Creates three kind clusters. One controller cluster with the name ks-ctrl and two worker clusters with the names ks-w-1 and ks-w-1.
2. Installs Calico Networking on controller and worker clusters.
3. Downloads the opensource KubeSlice helm charts.
4. Installs KubeSlice Controller on a ks-ctrl cluster.
5. Creates a kubeslice-demo project namespace on a controller cluster.
6. Registers the ks-w-1 and ks-w-2 worker clusters with a project.
7. Installs Slice Operator on the worker clusters.
8. Creates a slice called demo.
9. Creates the iperf namespace for application deployment.

To setup the KubeSlice demo, use the following command:

kubeslice-cli install --profile=minimal-demo

caution

• You must run the kubeslice-cli commands on the controller cluster. Run this command to ensure you are on the controller cluster: kubectx -c.
• Export the kubeconfig file before you run any kubeslice-cli command using this command: export KUBECONFIG=kubeslice/kubeconfig.yaml.

Switch the Cluster Context

Use the following command to switch the context of the cluster:

kubectx kind-ks-ctrl

Expected Output

✔ Switched to context "kind-ks-ctrl".

Validate the Installation

To validate a project, use the following command on the kubeslice-controller namespace to get the list of project:

kubeslice-cli get project -n kubeslice-controller

Example Output

Fetching KubeSlice Project...
🏃 Running command: /usr/local/bin/kubectl get projects.controller.kubeslice.io -n kubeslice-controller
NAME   AGE
kubeslice-demo   4h19m

To validate the registered worker clusters, use the following command:

kubeslice-cli get worker -n kubeslice-demo

Expected Output

Fetching KubeSlice Worker...
🏃 Running command: /usr/local/bin/kubectl get clusters.controller.kubeslice.io -n kubeslice-demo
NAME     AGE
ks-w-1   54m
ks-w-2   54m

success

You have successfully installed the KubeSlice Controller on the controller cluster and Slice Operator on the worker cluster.

The kubeslice-cli install —profile=minimal-demo command creates a slice called demo after successfully installing KubeSlice Controller and the Slice Operator on the worker clusters. To validate the demo slice, see Validating the Slice.

You can now onboard the iperf application on the demo slice. To onboard the application on the slice, see Deploying the iPerf Application.

You can also use the kubeslice-cli command to create a new slice for application onboarding. To create a slice on your demo setup, follow these steps.

Create a Slice

info

Skips this step if you do not want to create a new slice and continue onboarding the application on the demo slice.

Create a slice configuration YAML file using the following template and apply it to the project namespace.

Create the Slice Configuration YAML File

info

To understand more about the configuration parameters, see Slice Configuration Parameters.

Use the following template to create a slice.

apiVersion: controller.kubeslice.io/v1alpha1
kind: SliceConfig
metadata:
  name: <slice-name>                #The name of the slice
spec:  
  sliceSubnet: <slice-subnet>        #The slice subnet
  sliceType: Application
  sliceGatewayProvider:
    sliceGatewayType: OpenVPN
    sliceCaType: Local
  sliceIpamType: Local
  clusters:
  - <worker-cluster-name1>           #The name of your worker cluster1
  - <worker-cluster-name2>           #The name of your worker cluster2
  qosProfileDetails:
    queueType: HTB
    priority: 0
    tcType: BANDWIDTH_CONTROL
    bandwidthCeilingKbps: 30000
    bandwidthGuaranteedKbps: 20000
    dscpClass: AF11

The following is the example slice configuration YAML file:

apiVersion: controller.kubeslice.io/v1alpha1
kind: SliceConfig
metadata:
  name: slice-red
spec:  
  sliceSubnet: 10.190.0.0/16
  sliceType: Application
  sliceGatewayProvider:
    sliceGatewayType: OpenVPN
    sliceCaType: Local
  sliceIpamType: Local
  clusters:
  - ks-w-1
  - ks-w-2
  qosProfileDetails:
    queueType: HTB
    priority: 0
    tcType: BANDWIDTH_CONTROL
    bandwidthCeilingKbps: 30000
    bandwidthGuaranteedKbps: 20000
    dscpClass: AF11

Apply the Slice Configuration YAML File

Use the following command to create a slice.

kubeslice-cli create sliceConfig -n kubeslice-demo -f <slice-configuration-yaml>

Example

kubeslice-cli create sliceConfig -n kubeslice-demo -f slice-config.yaml

Example output

🏃 Running command: /usr/local/bin/kubectl apply -f slice-config.yaml -n kubeslice-demo
sliceconfig.controller.kubeslice.io/slice-red created

Successfully Applied Slice Configuration.

Validate the Slice

Use the following command to get a slice:

kubeslice-cli get sliceConfig -n kubeslice-demo

Example Output

Fetching KubeSlice sliceConfig...
🏃 Running command: /usr/local/bin/kubectl get sliceconfigs.controller.kubeslice.io -n kubeslice-demo
NAME        AGE
slice-red   110s

Validate the Slice on the Controller Cluster

To validate the slice configuration on the controller cluster, use the following command:

/usr/local/bin/kubectl --context=kind-ks-ctrl --kubeconfig=kubeslice/kubeconfig.yaml get workersliceconfig -n kubeslice-demo

Expected Output

NAME               AGE
slice-red-ks-w-1   19h
slice-red-ks-w-2   19h

To validate the worker slice gateway, use the following command:

/usr/local/bin/kubectl --context=kind-ks-ctrl --kubeconfig=kubeslice/kubeconfig.yaml get workerslicegateway -n kubeslice-demo

Expected Output

NAME                      AGE
slice-red-ks-w-1-ks-w-2   19h
slice-red-ks-w-2-ks-w-1   19h

Validate the Slice on the Worker Cluster

To validate the slice creation on each worker cluster, use the following command:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml get slice -n kubeslice-system

Expected Output

NAME        AGE
slice-red   19h

To validate the slice gateway on each worker cluster, use the following command:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml get slicegw -n kubeslice-system

Expected Output

NAME                      SUBNET          REMOTE SUBNET   REMOTE CLUSTER   GW STATUS
slice-red-ks-w-1-ks-w-2   10.190.1.0/24   10.190.2.0/24   ks-w-2

Deploy the iPerf Application

The kubeslice-cli tool sets up the iPerf demo application on the iperf namespace. The iperf-server is deployed on the ks-w-1 worker cluster and the iperf-sleep is deployed on the ks-w-2 worker cluster. You need to restart the iPerf deployment to onboard the applications on the slice.

To restart the deployment on the ks-w-1 worker, use the following command:

/usr/local/bin/kubectl rollout  restart deployment/iperf-server -n iperf --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml

Expected Output

deployment.apps/iperf-server restarted

To restart the deployment on the ks-w-2 worker, use the following command:

/usr/local/bin/kubectl rollout  restart deployment/iperf-sleep -n iperf --context=kind-ks-w-2 --kubeconfig=kubeslice/kubeconfig.yaml

Expected Output

deployment.apps/iperf-sleep restarted

Validate the iPerf Installation

To validate the iperf-server installation, use the following command:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml get pods -n iperf

Expected Output

NAME                           READY   STATUS    RESTARTS   AGE
iperf-server-758dd55bf-dkkbw   2/2     Running   0          36m

ServiceExports and ServiceImports

The iPerf server needs to be exported for visibility. Use the following command to export the iPerf server:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml apply  -f kubeslice/iperf-server-service-export.yaml -n iperf

Expected Output

serviceexport.networking.kubeslice.io/iperf-server created

To validate the service export on the ks-w-1 worker cluster where the iperf-server is installed, use the following command:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml get serviceexport  -n iperf

Expected Output

NAME           SLICE       INGRESS   PORT(S)    ENDPOINTS   STATUS
iperf-server   slice-red             5201/TCP   1           READY

To validate the service imports on the workers clusters, use the following commands:

/usr/local/bin/kubectl --context=kind-ks-w-1 --kubeconfig=kubeslice/kubeconfig.yaml get serviceimport -n iperf

Expected Output

NAME           SLICE       PORT(S)    ENDPOINTS   STATUS
iperf-server   slice-red   5201/TCP   1           READY

/usr/local/bin/kubectl --context=kind-ks-w-2 --kubeconfig=kubeslice/kubeconfig.yaml get serviceimport -n iperf

Expected Output

NAME           SLICE       PORT(S)    ENDPOINTS   STATUS
iperf-server   slice-red   5201/TCP   1           READY

Verify the Inter-Cluster Communication

Use the following command to describe the iperf-server service and retrieve the short and full DNS names for the service.

/usr/local/bin/kubectl --context=kind-ks-w-2 --kubeconfig=kubeslice/kubeconfig.yaml describe serviceimport iperf-server -n iperf | grep

Expected Output

"Dns Name:"
  Dns Name:  iperf-server.iperf.svc.slice.local
    Dns Name:     iperf-server-758dd55bf-dkkbw.ks-w-1.iperf-server.iperf.svc.slice.local

note

Use the short DNS name later to verify the inter-cluster communication.

To verify the iPerf connectivity, use the following command:

/usr/local/bin/kubectl --context=kind-ks-w-2 --kubeconfig=kubeslice/kubeconfig.yaml exec -it deploy/iperf-sleep -c iperf -n iperf -- iperf -c iperf-server.iperf.svc.slice.local -p 5201 -i 1 -b 10Mb;

Expected Output

------------------------------------------------------------
Client connecting to iperf-server.iperf.svc.slice.local, TCP port 5201
TCP window size: 45.0 KByte (default)
------------------------------------------------------------
[  1] local 10.1.2.5 port 49188 connected with 10.1.1.5 port 5201
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-1.00 sec   640 KBytes  5.24 Mbits/sec
[  1] 1.00-2.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 2.00-3.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 3.00-4.00 sec   640 KBytes  5.24 Mbits/sec
[  1] 4.00-5.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 5.00-6.00 sec   640 KBytes  5.24 Mbits/sec
[  1] 6.00-7.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 7.00-8.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 8.00-9.00 sec   640 KBytes  5.24 Mbits/sec
[  1] 9.00-10.00 sec   512 KBytes  4.19 Mbits/sec
[  1] 0.00-10.12 sec  5.88 MBytes  4.87 Mbits/sec

Uninstall KubeSlice

info

The kubeslic-cli uninstall command deletes the kind clusters created for the demo, uninstalling the KubeSlice Controller and the registered worker clusters.

To uninstall KubeSlice and delete the demo clusters, use the following command:

kubeslice-cli uninstall