Setting up a Play With Kubernetes environment for the IBM Kube 101 lab

kube101-on-pwk.md

kube101

These instructions show how to deploy a very simple web application that uses a data backend using redis. You don't need to install any software, just point your browser at the kubernetes playground and follow along with the steps.

Initial set up

1. In a browser, open the kubernetes playground and log in using either a Docker Hub id or a GitHub id. Then click on Start.

2. Click on ADD NEW INSTANCE to set up your first node.

3. Bring up up kubernetes on the node

   kubeadm init --apiserver-advertise-address $(hostname -i)
   

   copy the example output of commands to add another node to cluster (your token and IP will be different) kubeadm join --token 37364e.138fd5cd5f5dce72 192.168.0.13:6443 --discovery-token-ca-cert-hash sha256:d7968bbcd0fafd6630ae366b3ffb7c91c2e093784f922705b6278eb8de882b67

4. Set up networking

   kubectl apply -n kube-system -f \
   "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
   

5. Check status, repeat until the master shows "Ready"

   kubectl get nodes
   NAME      STATUS     ROLES     AGE       VERSION
   node1     Ready      master    1m       v1.10.2
   

6. Add another node

   • click ADD NEW INSTANCE

   • click into node2 and then run the command you recorded for adding new nodes from step 2:

     kubeadm join --token 37364e.138fd5cd5f5dce72 192.168.0.13:6443 --discovery-token-ca-cert-hash sha256:d7968bbcd0fafd6630ae366b3ffb7c91c2e093784f922705b6278eb8de882b67
     

7. Return to the master (node1) and check on status with kubectl, wait until node2 shows ready:

   kubectl get nodes
   NNAME      STATUS    ROLES     AGE       VERSION
   node1     Ready     master    2m        v1.10.2
   node2     Ready     <none>    38s       v1.10.2
   

8. Clone the application repository to simplify access to the lab deployment configuration files

   git clone https://github.com/IBM/guestbook.git