Optional Infra exercise

Author: rcastley

content/en/s4r/4-im-exercise/1-im-excersise.md renamed to content/en/s4r/3-initial-tour/6-infrastructure-home/3-im-exercise/1-im-excersise.md

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+---
+title: Infrastructure Exercise
+linkTitle: 3. Optional Exercise 
+description: This section of the workshop provides an exercise using Splunk infra monitoring based on the Kubernetes Navigator.
+weight: 4
+---
+
+{{% button icon="clock" %}}5 minutes{{% /button %}}
+
+This is the first section of our Kubernetes Navigator exercise. Below is some high-level information regarding Kubernetes, just in case you're not familiar with it.
+
+{{% notice title=" Kubernetes Terminology" style="info" %}}
+K8s, short for Kubernetes, is an open-source container orchestration platform. It manages the deployment, scaling, and maintenance of containerized applications, and we use it in this workshop to host our e-commerce application
+
+**Some terminology:**
+
+* A Kubernetes cluster is a group of machines, called nodes, that work together to run containerized applications.
+* Nodes are individual servers or VMs in the cluster. Typically, you would have several nodes in a cluster but you may have just one node, just like in this workshop.
+* Pods are the smallest deployable units in Kubernetes, representing one or more containers that share the same network and storage, enabling efficient application scaling and management
+* Applications are a collection of one or more Pods interacting together to provide a service.
+* Namespaces help you keep your applications organized and separate within the cluster, by providing a logical separation for multiple teams or projects within a cluster.
+* Workloads are like a task list and  define how many instances of your application should run, how they should be created, and how they should respond to failures
+{{% /notice %}}
+
+Please select the **K8s nodes** tile from the Tile pane if you have not yet done so.
+(Select Kubernetes as your Technology). This will bring you to the Kubernetes Navigator Page.
+
+![Kubernetes](images/im-kubernetes.png?width=30vw)
+
+The screenshot above shows the main part of the Kubernetes navigator. It will show all the clusters & their nodes that send metrics to the Splunk Observability Suite, and the first row of charts that show cluster-based Metrics. In the workshop, you will mostly see single-node Kubernetes clusters.
+
+Before we dive deeper, let's make sure we are looking at our own cluster.
+
+{{% notice title="Info" style="green" title="Exercise" icon="running" %}}
+
+* First, use the ![k8s filter](images/k8s-add-filter.png?classes=inline) option to pick your cluster.
+* This can be done by selecting `k8s.cluster.name` from the filter drop-down box.
+* You then can start typing the name of your cluster, (as provided by your instructor). The name should also appear in the drop-down values. Select yours and make sure just the one for your workshop is highlighted with a ![blue tick](images/select-checkmark.png?classes=inline&width=30px).
+* Click the {{% button style="blue"  %}}  Apply Filter   {{% /button %}} button to focus on our Cluster
+* We now should have a single cluster visible.
+{{% /notice %}}
+
+Let's move on to the next page of this exercise and look at your cluster in detail.