Workshop Guide for Demo Appliance for Tanzu Kubernetes Grid 1.2.1 Fling

# Workshop Guide for Demo Appliance for Tanzu Kubernetes Grid 1.2.1 Fling Pre-requisites: https://hackmd.io/Wo960wkVRkKPvwLXS3k6VA # TKG Cluster Deployment ## Step 1. SSH to TKG Demo Appliance SSH to the TKG Demo Appliance using `root`. If you can access the VM without going over the public internet, then the address would be 192.168.2.2 or whatever address you had configured for the TKG Demo Appliance. ![](https://i.imgur.com/jZnOWqq.png) ## Step 2. Deploy TKG Management Cluster There are two methods in setting up TKG, using either the TKG UI or CLI. Both methods are documented below. ### TKG UI Run the following command to start the UI wizard: `tkg init --ui` > As of TKG 1.2 > `tkg init -b 0.0.0.0:8080 --ui` > Once you have succesfully open the connection, open a local web browser and navigate to `192.168.2.2:8080` (Or `<Appliance-IP>:8080`) > [name=yogi] Open up another terminal session on your workstation and run the following command to use SSH port forwarding so we can connect to the TKG UI from your local workstation: ``` ssh root@<public-ip> -L 8080:127.0.0.1:8080 -N ``` > **Note:** The local port can be any port that is NOT in use on your local network. In the example above, we are choosing 8080. You can use another port in case 8080 is in use, but it looks like a side effect is that no progress is shown in the TKG UI which is a known issue. If you are on Windows, you can use Putty to setup SSH port forwarding using the following configuration: Under Connection->SSH->Tunnels use `8080` for Source Port and `127.0.0.1:8080` for Destination and then click on the "Add" button ![](https://i.imgur.com/HzwFaKa.png) Under Session use `ssh root@192.168.2.2` (or whatever internal IP you had configured the TKG Demo Appliance) and then login with your credentials ![](https://i.imgur.com/7Du4xws.png) > **Note:** If the SSH port forwarding was successfull, you will not see the terminal return and it will look like it is hanging. This is expected or else you would be prompted to enter the correct password if you had miss-typed it. Once you have succesfully open the connection, open a local web browser and navigate to `localhost:8080` and you should be taken to the following screen ![](https://i.imgur.com/8MmsJxk.png) Click on "Deploy your management cluster on VMware vSphere" to begin the deployment #### IaaS Provider Enter your VMC vCenter Server information and then click "Connect" button and fill the Datacenter and SSH Key (you can use dummy value if you don't have SSH key) but this is useful if you need to SSH into any of the TKG Nodes (username `capv`) ![](https://i.imgur.com/GxznnSu.png) When prompted, select `Deploy TKG Management Cluster` ![](https://i.imgur.com/LIULI3b.png) #### Managment Cluster Settings Select Development Flavor and specify a size, then give the K8s Management Cluster a name and specify the HA Proxy VM Template. The difference between the "Development" and "Production" plan is number of Control Plane and Worker Node VMs that are deployed. Using the "Development" plan, 1 x Control Plane and 1 x Worker Node is provisioned. Using the "Production" plan, 3 x Control Plane and 3 x Worker Node is provisioned. You can always scale up post-deployment by using the `tkg scale cluster` operation. ![](https://i.imgur.com/PzaHHyf.png) #### Resources Select `TKG` Resource Pool, VM Folder and WorkloadDatastore ![](https://i.imgur.com/UvPmf1z.png) #### Metadata This section is optional. You can leave blank #### Kubernetes Network Select `tkg-network` and leave the other defaults ![](https://i.imgur.com/AZSckXa.png) #### OS Image Selec thte K8s PhotonOS Template ![](https://i.imgur.com/BeImvzl.png) #### Customer Improvement Experience Program You can leave the default #### Review Review all settings to ensure they match and then click "Deploy Management Cluster" button at the bottom to begin the deployment. ![](https://i.imgur.com/ridR90J.png) ![](https://i.imgur.com/EYDBxl2.png) This can take ~6-10 minutes to complete and once the Management Cluster has been deployed, you can go close the web browser and go back to your first SSH session and do `ctrl+c` to stop the TKG UI. We can verify that all pods are up by running the following command: ``` # k get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE capi-kubeadm-bootstrap-system capi-kubeadm-bootstrap-controller-manager-6dd5cc66f9-jfjnv 2/2 Running 0 12h capi-kubeadm-control-plane-system capi-kubeadm-control-plane-controller-manager-5b84cc649c-c8sl6 2/2 Running 0 12h capi-system capi-controller-manager-7bf844cd67-2znlv 2/2 Running 0 12h capi-webhook-system capi-controller-manager-657574b8bd-qhmt6 2/2 Running 0 12h capi-webhook-system capi-kubeadm-bootstrap-controller-manager-b7c6fbf88-kgv5c 2/2 Running 0 12h capi-webhook-system capi-kubeadm-control-plane-controller-manager-f8bc57c4f-67fdv 2/2 Running 0 12h capi-webhook-system capv-controller-manager-c877dc585-4w7lj 2/2 Running 0 12h capv-system capv-controller-manager-5c678887b4-qrcjh 2/2 Running 0 12h cert-manager cert-manager-74c876585c-mw59n 1/1 Running 0 12h cert-manager cert-manager-cainjector-d8d75bc8d-mt8g6 1/1 Running 0 12h cert-manager cert-manager-webhook-bb58d99c-jwsrl 1/1 Running 0 12h kube-system antrea-agent-9z8td 2/2 Running 0 12h kube-system antrea-agent-xf4z5 2/2 Running 0 12h kube-system antrea-controller-7d888bb6-wgnml 1/1 Running 0 12h kube-system coredns-85855cd7ff-5cf6l 1/1 Running 0 12h kube-system coredns-85855cd7ff-ctwlq 1/1 Running 0 12h kube-system etcd-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-apiserver-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-controller-manager-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-proxy-7hnrr 1/1 Running 0 12h kube-system kube-proxy-rn6mk 1/1 Running 0 12h kube-system kube-scheduler-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-vip-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system vsphere-cloud-controller-manager-8qp58 1/1 Running 0 12h kube-system vsphere-csi-controller-7bdcfc6454-qbxq8 5/5 Running 0 12h kube-system vsphere-csi-node-5pttd 3/3 Running 0 12h kube-system vsphere-csi-node-flzp8 3/3 Running 0 12h tkg-system-telemetry tkg-telemetry-1609567200-2q85z 0/1 Completed 0 10h tkg-system-telemetry tkg-telemetry-1609588800-6w9kk 0/1 Completed 0 4h29m ``` ### TKG CLI Edit `config.yaml` using either the vi or nano editor and update the `VSPHERE_SERVER` variable with the Internal IP Address of your VMC vCenter Server (e.g. 10.2.224.4) and `VSPHERE_PASSWORD` variable with the credentials for cloudadmin@vmc.local account and save the file when you have finished. If you have other changes that deviate from this example, make sure to update those as well including the name of the K8s and HA Proxy vSphere Template. ``` VSPHERE_SERVER: '10.2.224.4' VSPHERE_USERNAME: 'cloudadmin@vmc.local' VSPHERE_PASSWORD: 'FILL-ME-IN' ... ... ``` > **Note:** The `config.yaml` is just an example for demo purposes. You can update other variables to match your environment. When using the TKG UI, it will automatically generate and update `.tkg/config.yaml` and you can use that method to see what variable and values are used. Run the following command to copy our sample `config.yaml` into `.tkg` directory: `cp config.yaml .tkg/config.yaml` Run the following command and specify the Virtual IP Address to use for Management Control Plane to deploy K8s Management Cluster: `tkg init -i vsphere -p dev --name tkg-mgmt --vsphere-controlplane-endpoint-ip 192.168.2.10 ` When prompted for the two questions, you can answer `n` and `y` to continue the deployment. > **Note:** By default, the TKG `dev` plan will be used. If you wish to specify, simply use `--plan=prod` to specify the `prod` plan. This will take ~6-8 minutes to complete and once the Management Cluster has been deployed, we can verify that all pods are up by running the following command: ``` # k get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE capi-kubeadm-bootstrap-system capi-kubeadm-bootstrap-controller-manager-6dd5cc66f9-jfjnv 2/2 Running 0 12h capi-kubeadm-control-plane-system capi-kubeadm-control-plane-controller-manager-5b84cc649c-c8sl6 2/2 Running 0 12h capi-system capi-controller-manager-7bf844cd67-2znlv 2/2 Running 0 12h capi-webhook-system capi-controller-manager-657574b8bd-qhmt6 2/2 Running 0 12h capi-webhook-system capi-kubeadm-bootstrap-controller-manager-b7c6fbf88-kgv5c 2/2 Running 0 12h capi-webhook-system capi-kubeadm-control-plane-controller-manager-f8bc57c4f-67fdv 2/2 Running 0 12h capi-webhook-system capv-controller-manager-c877dc585-4w7lj 2/2 Running 0 12h capv-system capv-controller-manager-5c678887b4-qrcjh 2/2 Running 0 12h cert-manager cert-manager-74c876585c-mw59n 1/1 Running 0 12h cert-manager cert-manager-cainjector-d8d75bc8d-mt8g6 1/1 Running 0 12h cert-manager cert-manager-webhook-bb58d99c-jwsrl 1/1 Running 0 12h kube-system antrea-agent-9z8td 2/2 Running 0 12h kube-system antrea-agent-xf4z5 2/2 Running 0 12h kube-system antrea-controller-7d888bb6-wgnml 1/1 Running 0 12h kube-system coredns-85855cd7ff-5cf6l 1/1 Running 0 12h kube-system coredns-85855cd7ff-ctwlq 1/1 Running 0 12h kube-system etcd-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-apiserver-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-controller-manager-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-proxy-7hnrr 1/1 Running 0 12h kube-system kube-proxy-rn6mk 1/1 Running 0 12h kube-system kube-scheduler-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system kube-vip-tkg-mgmt-control-plane-kb7nz 1/1 Running 0 12h kube-system vsphere-cloud-controller-manager-8qp58 1/1 Running 0 12h kube-system vsphere-csi-controller-7bdcfc6454-qbxq8 5/5 Running 0 12h kube-system vsphere-csi-node-5pttd 3/3 Running 0 12h kube-system vsphere-csi-node-flzp8 3/3 Running 0 12h tkg-system-telemetry tkg-telemetry-1609567200-2q85z 0/1 Completed 0 10h tkg-system-telemetry tkg-telemetry-1609588800-6w9kk 0/1 Completed 0 4h29m ``` ## Step 3. Deploy TKG Workload Cluster Run the following command to deploy TKG Cluster called `tkg-cluster-01` or any other name you wish to use along with the Virtual IP Address for TKG Workload Cluster Control Plane. By default, this will deploy the latest version of K8s which is currently v1.19.1 ``` # tkg create cluster tkg-cluster-01 --plan=dev --vsphere-controlplane-endpoint-ip 192.168.2.11 ``` > **Note:** By default, the TKG `dev` plan will be used. If you wish to specify, simply use `--plan=prod` to specify the `prod` plan. This will take a few minutes to complete. Once the TKG Cluster is up and running, we need to retrieve the credentials before we can use it. To do so, run the following command: ``` # tkg get credentials tkg-cluster-01 Credentials of workload cluster 'tkg-cluster-01' have been saved You can now access the cluster by running 'kubectl config use-context tkg-cluster-01-admin@tkg-cluster-01' ``` To switch context to our newly provisioned TKG Cluster, run the following command which will be based on the name of the cluster: ``` # k config use-context tkg-cluster-01-admin@tkg-cluster-01 ``` > **Note:** Another benefit of the TKG Demo Appliance is that the terminal prompt is automatically updated based on TKG Cluster context that you are currently in. If you had TKG CLI running on your desktop, this would not be known and you would have to interograte your context by using standard kubectl commands. Here is what your terminal prompt would look like after deployingn TKG Management Cluster: ![](https://i.imgur.com/XXiw8wu.png) Here is what your terminal prompt would look like after switching context to the TKG Worload Cluster: ![](https://i.imgur.com/K74XIbe.png) To list all available Kubernetes contexts in case you wish to switch, you can use the following command: ``` # k config get-contexts CURRENT NAME CLUSTER AUTHINFO NAMESPACE tkg-cluster-01-admin@tkg-cluster-01 tkg-cluster-01 tkg-cluster-01-admin * tkg-mgmt-admin@tkg-mgmt tkg-mgmt tkg-mgmt-admin ``` Lets ensure all pods in our new TKG Cluster is up by running the following command: ``` # k get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system antrea-agent-2m77j 2/2 Running 0 3m45s kube-system antrea-agent-vxbnb 2/2 Running 0 4m30s kube-system antrea-controller-7d888bb6-vg2nn 1/1 Running 0 4m30s kube-system coredns-85855cd7ff-l5x7r 1/1 Running 0 4m30s kube-system coredns-85855cd7ff-zgc87 1/1 Running 0 4m30s kube-system etcd-tkg-cluster-01-control-plane-nhzfb 1/1 Running 0 4m37s kube-system kube-apiserver-tkg-cluster-01-control-plane-nhzfb 1/1 Running 0 4m37s kube-system kube-controller-manager-tkg-cluster-01-control-plane-nhzfb 1/1 Running 0 4m37s kube-system kube-proxy-5lwlm 1/1 Running 0 4m30s kube-system kube-proxy-vhzlc 1/1 Running 0 3m45s kube-system kube-scheduler-tkg-cluster-01-control-plane-nhzfb 1/1 Running 0 4m36s kube-system kube-vip-tkg-cluster-01-control-plane-nhzfb 1/1 Running 0 4m37s kube-system vsphere-cloud-controller-manager-9nnw7 1/1 Running 0 4m30s kube-system vsphere-csi-controller-7bdcfc6454-p6nht 5/5 Running 0 4m30s kube-system vsphere-csi-node-dglmk 3/3 Running 0 3m45s kube-system vsphere-csi-node-zgjk2 3/3 Running 0 4m29s ``` ## Step 4. Upgrade TKG Workload Cluster To be able to deploy earlier releases of K8s version, you will need to set the `VSPHERE_TEMPLATE` environment variable matching the name of the vSphere Template for your desired K8s version. In our example, we will depoy v1.18.10 and simply run the following command: ``` export VSPHERE_TEMPLATE=photon-3-kube-v1.18.10_vmware.1 ``` Next, run the following command to deploy a TKG v1.18.10 Cluster called `tkg-cluster-02` or any other name you wish to use along with the Virtual IP Address for TKG Workload Cluster Control Plane. We will use this new clsuter upgrade to latest v1.19.3. ``` # tkg create cluster tkg-cluster-02 --plan=dev --kubernetes-version=v1.18.10+vmware.1 --vsphere-controlplane-endpoint-ip 192.168.2.12 ``` > **Note:** By default, the TKG `dev` plan will be used. If you wish to specify, simply use `--plan=prod` to specify the `prod` plan. Once the new TKG v1.18.8 Cluster has been provisioned, we can confirm its version before upgrading by running the following command: ``` # tkg get cluster NAME NAMESPACE STATUS CONTROLPLANE WORKERS KUBERNETES ROLES tkg-cluster-01 default running 1/1 1/1 v1.19.3+vmware.1 <none> tkg-cluster-02 default running 1/1 1/1 v1.18.10+vmware.1 <none> ``` To start the upgrade, simply run the following command and specify the name of the cluster: ``` # tkg upgrade cluster tkg-cluster-02 Logs of the command execution can also be found at: /tmp/tkg-20210102T164239352069735.log Upgrading workload cluster 'tkg-cluster-02' to kubernetes version 'v1.19.3+vmware.1'. Are you sure? [y/N]: y Validating configuration... Verifying kubernetes version... Retrieving configuration for upgrade cluster... Using custom image repository: registry.rainpole.io/library consuming Azure VM image information from BOM Create InfrastructureTemplate for upgrade... Configuring cluster for upgrade... Upgrading control plane nodes... Patching KubeadmControlPlane with the kubernetes version v1.19.3+vmware.1... Waiting for kubernetes version to be updated for control plane nodes Upgrading worker nodes... Patching MachineDeployment with the kubernetes version v1.19.3+vmware.1... Waiting for kubernetes version to be updated for worker nodes... Cluster 'tkg-cluster-02' successfully upgraded to kubernetes version 'v1.19.3+vmware.1' ``` Depending on the size of your TKG Cluster, this operation can take some time to complete. To confirm the version of TKG Cluster after the upgrade, we can run the following command to verify: ``` # tkg get cluster NAME NAMESPACE STATUS CONTROLPLANE WORKERS KUBERNETES ROLES tkg-cluster-01 default running 1/1 1/1 v1.19.3+vmware.1 <none> tkg-cluster-02 default running 1/1 1/1 v1.19.3+vmware.1 <none> ``` ## Step 5 Tanzu Mission Control (Optional) > **Note:** Internet connectivity will be required from the TKG Network to reach Tanzu Mission Control service. Login to [VMware Cloud Console](https://console.cloud.vmware.com/) and ensure that you have been entitled to the Tanzu Mission Control(TMC) service. You can confirm this by making sure you see the TMC Service tile as shown below. If you are not entitled, please reach out to your VMware account team to register for TMC evaluation. ![](https://i.imgur.com/bjAae69.png) Next, click on your user name and navigate to "My Accounts" to create the required API token ![](https://i.imgur.com/Re1rrjk.png) Generate a new API token for the TMC service which will be required to attach our TKG Cluster that we have deployed earlier. ![](https://i.imgur.com/hszgDVL.png) Make a note of the API Token as we will need this later. If you forget to copy it or have lost it, you can simply come back into this screen and just re-generate. Lets now jump back into the TKG Demo Appliance to attach our TKG Cluster to TMC. Run the following command to login to the TMC service and provide the API Token that you had created earlier along with a context name which is user defined. ``` # tmc login -c -n tkg-cluster-01 ``` ![](https://i.imgur.com/HkRpwcc.png) Now we need to create a TMC Cluster Group which allows you to logically group TKG Cluster which is reflected in the TMC UI. To do so, run the following command and give it a name ``` # tmc clustergroup create -n vmc-cluster ℹ using template "default" ✔ clustergroup "vmc-cluster" created successfully ``` To attach our TKG Cluster, we need to run the following command which will generate YAML manifest which we will need to run to actually deploy TMC Pod into our TKG Cluster ``` # tmc cluster attach --group vmc-cluster --name vmc-tkg-cluster-01 ✔ cluster "vmc-tkg-cluster-01" created successfully ℹ Run `kubectl apply -f k8s-attach-manifest.yaml` to attach the cluster ``` Finally, we run the apply to attach our TKG Cluster to TMC ``` # k apply -f k8s-attach-manifest.yaml namespace/vmware-system-tmc created configmap/stack-config created secret/tmc-client-secret created customresourcedefinition.apiextensions.k8s.io/agents.clusters.tmc.cloud.vmware.com created customresourcedefinition.apiextensions.k8s.io/extensions.clusters.tmc.cloud.vmware.com created serviceaccount/extension-manager created clusterrole.rbac.authorization.k8s.io/extension-manager-role created clusterrolebinding.rbac.authorization.k8s.io/extension-manager-rolebinding created service/extension-manager-service created deployment.apps/extension-manager created serviceaccount/extension-updater-serviceaccount created clusterrole.rbac.authorization.k8s.io/extension-updater-clusterrole created clusterrolebinding.rbac.authorization.k8s.io/extension-updater-clusterrolebinding created service/extension-updater created deployment.apps/extension-updater created serviceaccount/agent-updater created clusterrole.rbac.authorization.k8s.io/agent-updater-role created clusterrolebinding.rbac.authorization.k8s.io/agent-updater-rolebinding created deployment.apps/agent-updater created cronjob.batch/agentupdater-workload created ``` ![](https://i.imgur.com/blxDjKg.png) # TKG Demos ## Step 1. Storage Class and Persistent Volume Change into `storage` demo directory on the TKG Demo Appliance ``` cd /root/demo/storage ``` Retrieve the vSphere Datastore URL from the vSphere UI which will be used to create our Storage Class definition ![](https://i.imgur.com/rBp1ZYb.png) > **Note:** There are many ways of associating a vSphere Datastore to Storage Class definition. In VMC, this is currently required as the Cloud Native Storage/Container Storage Interface in VMC can leverage vSphere Tags yet. Edit the `defaultstorageclass.yaml` and update the `datastoreurl` property ``` kind: StorageClass apiVersion: storage.k8s.io/v1 metadata: name: standard annotations: storageclass.kubernetes.io/is-default-class: "true" provisioner: csi.vsphere.vmware.com parameters: datastoreurl: ds:///vmfs/volumes/vsan:c4f738225e324622-b1e100dd1abe8249/ ``` > **Note** Make there is a trailing "/" at the end of the datastoreurl value, this is required. If you copy the URL from the vSphere UI, the correct URL will be included. Create Storage Class definition: ``` # k apply -f defaultstorageclass.yaml persistentvolumeclaim/pvc-test created ``` Confirm the Storage Class was created: ``` # k get sc NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE standard (default) csi.vsphere.vmware.com Delete Immediate false 3s ``` Create 2GB Persistent Volume called `pvc-test` using our default Storage Class: ``` # k apply -f pvc.yaml persistentvolumeclaim/pvc-test created ``` Confirm the Persistent Volum was created: ``` # k get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE pvc-test Bound pvc-ff86c605-d600-4bcc-ac03-9f511fe7cb77 2Gi RWO standard 13m ``` > **Note:** This can take up to a few seconds before the PV has been realized in vSphere We can also see the new Persistent Volume in vSphere UI by navigating to the specific vSphere Datatore under `Monitor->Container Volumes` ![](https://i.imgur.com/bzQzGSG.png) Delete the Persistent Volume: ``` # k delete pvc pvc-test persistentvolumeclaim "pvc-test" deleted ``` ## Step 2. Simple K8s Demo App Change into `yelb` demo directory on the TKG Demo Appliance ``` cd /root/demo/yelb ``` Create `yelb` namespace for our demo: ``` k create ns yelb ``` Deploy the yelb application: ``` # k apply -f yelb.yaml service/redis-server created service/yelb-db created service/yelb-appserver created service/yelb-ui created deployment.apps/yelb-ui created deployment.apps/redis-server created deployment.apps/yelb-db created deployment.apps/yelb-appserver created ``` Wait for the deployment to complete by running the following: ``` # k -n yelb get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-server 1/1 1 1 47s yelb-appserver 1/1 1 1 47s yelb-db 1/1 1 1 47s yelb-ui 1/1 1 1 47s ``` Retrieve the "UI" Pod ID: ``` # k -n yelb get pods | grep ui yelb-ui-79c68df689-66bwq 1/1 Running 0 2m ``` Retrieve the IP Address of the Worker Node running the "UI" container: ``` # k -n yelb describe pod yelb-ui-79c68df689-66bwq Name: yelb-ui-79c68df689-66bwq Namespace: yelb Priority: 0 Node: william-02-md-0-848878f85b-vddk4/192.168.2.185 Start Time: Tue, 24 Mar 2020 18:19:23 +0000 ... ... ``` The IP Address can be found at the top under the `Node:` property and in this example, it is `192.168.2.185` If you have a desktop machine that has a browser and can access the TKG Network, you can open a browser to the following address: `http://192.168.2.185:31001` If you do not have a system, then we can still connect but we will need to setup SSH port forwarding to IP Address above. ``` ssh root@[TKG-DEMO-APPLIANCE-IP] -L 30001:192.168.2.185:31001 ``` Once you have established the SSH tunnel, you can open browser on your local system `localhost:31001` The Yelb application is interactive, so you feel free to play around with it ![](https://i.imgur.com/0jffUU7.png) > **Note:** Details about this demo app can be found [here](https://www.virtuallyghetto.com/2020/03/how-to-fix-extensions-v1beta1-missing-required-field-selector-for-yelb-kubernetes-application.html) and the original author of the application is Massimo Re'Ferre (his legacy lives on as Ex-VMware) Befor proceeding to the next two demo, you will need to delete the `yelb` application: ``` k delete -f yelb.yaml ``` ## Step 3. Basic Load Balancer Change into `metallb` demo directory on the TKG Demo Appliance ``` cd /root/demo/metallb ``` Edit the `metallb-config.yaml` and update the `addresses` property using small subset of the DHCP range from the `tkg-network` network. In our example, we used 192.168.2.0/24, so lets chose the last 5 IP Addresses for the Metal LB to provision from. ``` apiVersion: v1 kind: ConfigMap metadata: namespace: metallb-system name: config data: config: | address-pools: - name: default protocol: layer2 addresses: - 192.168.2.246-192.168.2.250 ``` Create the `metallb-system` namespace: ``` # k create ns metallb-system namespace/metallb-system created ``` Create required secret: ``` # k create secret generic -n metallb-system memberlist --from-literal=secretkey="\$(openssl rand -base64 128)" secret/memberlist created ``` Deploy Metal LB: ``` # k apply -n metallb-system -f metallb.yaml podsecuritypolicy.policy/controller created podsecuritypolicy.policy/speaker created serviceaccount/controller created serviceaccount/speaker created clusterrole.rbac.authorization.k8s.io/metallb-system:controller created clusterrole.rbac.authorization.k8s.io/metallb-system:speaker created role.rbac.authorization.k8s.io/config-watcher created role.rbac.authorization.k8s.io/pod-lister created clusterrolebinding.rbac.authorization.k8s.io/metallb-system:controller created clusterrolebinding.rbac.authorization.k8s.io/metallb-system:speaker created rolebinding.rbac.authorization.k8s.io/config-watcher created rolebinding.rbac.authorization.k8s.io/pod-lister created daemonset.apps/speaker created deployment.apps/controller created ``` Apply our Metal LB configuration: ``` # kubectl apply -n metallb-system -f metallb-config.yaml configmap/config created ``` Verify all pods within `metallb-system` namespace is running: ``` # k -n metallb-system get pod NAME READY STATUS RESTARTS AGE controller-66fdff65b9-bwxq7 1/1 Running 0 2m40s speaker-8jz5m 1/1 Running 0 2m40s speaker-bmxcq 1/1 Running 0 2m40s speaker-fsxq5 1/1 Running 0 2m40s speaker-t2pgj 1/1 Running 0 2m40s speaker-vggr8 1/1 Running 0 2m40s speaker-zjw7v 1/1 Running 0 2m40s ``` ## Step 4. Basic K8s Demo App Using Load Balancer Change into `yelb` demo directory on the TKG Demo Appliance ``` cd /root/demo/yelb ``` Deploy the yelb Load Balancer version of the application: ``` # k apply -f yelb-lb.yaml service/redis-server created service/yelb-db created service/yelb-appserver created service/yelb-ui created deployment.apps/yelb-ui created deployment.apps/redis-server created deployment.apps/yelb-db created deployment.apps/yelb-appserver created ``` Wait for the deployment to complete by running the following: ``` # k -n yelb get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-server 1/1 1 1 52s yelb-appserver 1/1 1 1 52s yelb-db 1/1 1 1 52s yelb-ui 1/1 1 1 52s ``` Retrieve the Load Balancer IP for the Yelb Service: ``` # k -n yelb get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE redis-server ClusterIP 100.66.186.168 <none> 6379/TCP 84s yelb-appserver ClusterIP 100.65.7.122 <none> 4567/TCP 84s yelb-db ClusterIP 100.69.33.14 <none> 5432/TCP 84s yelb-ui LoadBalancer 100.68.255.238 192.168.2.245 80:31376/TCP 84s ``` We should see an IP Address allcoated from our Metal LB range in the `EXTERNAL-IP` column. Instead of connecting directly to a specific TKG Cluster Node, we can now connect via this Load Balancer IP and you will see it is mapped to port 80 instead of the original appplicatio port on 31001 If you have a desktop machine that has a browser and can access the TKG Network, you can open a browser to the following address: `http://192.168.2.245` If you do not have a system, then we can still connect but we will need to setup SSH port forwarding to IP Address above and we'll use local port of 8081 to ensure there are no conflicts ``` ssh root@[TKG-DEMO-APPLIANCE-IP] -L 8081:192.168.2.245:80 ``` Once you have established the SSH tunnel, you can open browser on your local system `localhost:8081` # Extras (Optional) ## Harbor A local Harbor instance is running on the TKG Demo Appliance and provides all the required containers for setting up TKG Clusters and TKG demos in an air-gap/non-internet environment. You can connect to the Harbor UI by pointing a browser to the address of your TKG Demo Appliance with the following credentials: Username: `admin` Password: `Tanzu1!` ![](https://i.imgur.com/evV3YoG.png) You can also login to Harbor using Docker CLI to push and/or pull additional containers by using the following: ``` # docker login -u admin -p Tanzu1! registry.rainpole.io/library WARNING! Using --password via the CLI is insecure. Use --password-stdin. WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded ``` > **Note:** You must use `registry.rainpole.io` which is a real certificate generated by letsencrypt which requires a domain that you own using DNS-challenge. To support air-gap/non-internet scenarios, TKG today requires a registry that has a proper signed certificate (self-sign and custom CA) are NOT currently supported. ## Octant To easily navigate, learn and debug Kubernetes a useful tool such as Octant can be used. Octant is already installed on the TKG Demo Appliance and you can launch it running the following command: ``` octant ``` ![](https://i.imgur.com/BXzpSBp.png) Octant listens locally on `127.0.0.1:7777` and to be able to access the Octant UI, we need to setup SSH port forwarding to TKG Demo Appliance IP on port `7777` To do so, run the following command in another terminal: ``` ssh root@[TKG-DEMO-APPLIANCE-IP] -L 7777:127.0.0.1:7777 ``` > **Note:** You can also use Putty to setup SSH port forwarding, please refer to the TKG UI for instructions. Once you have established the SSH tunnel, you can open browser on your local system `localhost:7777` and you should see the Octant UI. ![](https://i.imgur.com/qyKNwxr.png) For more information on how to use Octan, please refer to the official documentation [here](https://octant.dev/docs/master/) ## Forward TKG logs to vRealize Log Intelligence Cloud > **Note:** Internet connectivity will be required from the TKG Network to reach the vRLIC service. Please see [https://blogs.vmware.com/management/2020/06/configure-log-forwarding-from-vmware-tanzu-kubernetes-cluster-to-vrealize-log-insight-cloud.html](https://blogs.vmware.com/management/2020/06/configure-log-forwarding-from-vmware-tanzu-kubernetes-cluster-to-vrealize-log-insight-cloud.html) for more details ## Monitor TKG Clusters with vRealize Operations Cloud > **Note:** Internet connectivity will be required from the TKG Network to reach the vROPs Cloud service. Please see [https://blogs.vmware.com/management/2020/06/monitor-tanzu-kubernetes-clusters-using-vrealize-operations.html](https://blogs.vmware.com/management/2020/06/monitor-tanzu-kubernetes-clusters-using-vrealize-operations.html) for more details ## Setup Network Proxy for TKG Mgmt and Workload Clusters Please see [https://www.virtuallyghetto.com/2020/05/how-to-configure-network-proxy-with-standalone-tanzu-kubernetes-grid-tkg.html](https://www.virtuallyghetto.com/2020/05/how-to-configure-network-proxy-with-standalone-tanzu-kubernetes-grid-tkg.html) for more details

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