In this lab, you have been provided two servers. You will install and configure Kubernetes and configure it to use containerd for container management. You will need to initialize a Kubernetes cluster, add a network plugin, and add a Node to the cluster. Then, you will need to create a deployment file that starts three replicas of an Nginx image. Once you’re done, there is a provided script called `check-tasks.sh` that can be used to check that all tasks have been completed.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Log In to the Provided Servers
Log in to the servers as
cloud_userwith the provided passwords to ensure you can log in. When the fileSERVER-READYis shown in the/home/cloud_userfolder for both servers, you can follow along with the tasks.- Install Kubernetes and containerd and Create a Cluster
Your task for this objective is to install the Kubernetes repository, and then install Kubernetes.
You will use whatever system commands are required.
The repository file should be called
/etc/yum.repos.d/kubernetes.repo.The contents of the repo should be:
[kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm- package-key.gpgNext, install the three kubernetes programs.
Access the containerd repo.
You should replace the
config.tomlwith a new default containerd configuration.Using the required commands, enable and start containerd. Be sure to configure containerd to start automatically on a reboot.
Next, enable and start the kubelet. Be sure to configure the kubelet to start automatically on a reboot.
Use the relevant command to initialize the cluster. The network you should use is
172.16.0.0/16.To set up your user, you will need to use the information output from the
kubeadm initcommand that was run previously.Apply the Calico network plugin.
- Add the Worker Node to the Cluster
Add your worker Node to the cluster. You will need to use the information output from the
kubeadm initcommand that was run previously.Use the
kubectl get nodescommand to test that the worker Node has been added.
- Create a Deployment File That Starts Three Replicas
You will create a deployment file called
deployment-nginx.ymlthat starts three replicas, runs the Nginx image, and uses port8080for its output.- Check That the Deployment Started the Three Replicas
Using
kubectl, create the deployment and check that the three replicas have started.You can use a script in the home folder called
check-tasks.shto check that you have completed the tasks for this lab.
