Learn KOP - Deploy Test Workload - Rafay Product Documentation
Part 4: Workload
What Will You Do
In this part of the self-paced exercise, you will deploy a test workload to your Amazon EKS cluster that will be used to change the load on the cluster and trigger Karpenter to scale the cluster up and down.
Step 1: Deploy Workload
In this step, you will create a workload on the cluster using the "inflate-workload.yaml" file which contains the declarative specification for our test workload.
The following items may need to be updated/customized if you made changes to these or used alternate names.
- project: "defaultproject"
- clusters: "karpenter-cluster"
name: inflate-workload
namespace: default
project: defaultproject
type: NativeYaml
clusters: karpenter-cluster
payload: inflate.yaml
- Open Terminal (on macOS/Linux) or Command Prompt (Windows) and navigate to the folder where you forked the Git repository
- Navigate to the folder "/getstarted/karpenter/workload"
- Type the command below
rctl create workload inflate-workload.yaml
If there were no errors, you should see a message like below
Workload created successfully
Now, let us publish the newly created workload to the EKS cluster. The workload can be deployed to multiple clusters as per the configured "placement policy". In this case, you are deploying to a single EKS cluster with the name "karpenter-cluster".
rctl publish workload inflate-workload
In the web console, click on Applications -> Workloads. You should see something like the following.
Step 2: Scale Workload
The test workload can be scaled to consume the resources of the cluster. Once the cluster resources are constrained, Karpenter will increase the number of nodes in the cluster as needed.
- Navigate to Infrastructure -> Clusters
- Click on "KUBECTL" in the cluster card
- Verify the number of "inflate" pods is 0
kubectl get deployments
- You should see a result like the following showing the inflate deployment with 0 pods running.
NAME READY UP-TO-DATE AVAILABLE AGE
inflate 0/0 0 0 62s
- Verify the number of nodes
kubectl get nodes
- You should see a result like the following showing 1 node.
NAME STATUS ROLES AGE VERSION
ip-192-168-21-112.us-west-2.compute.internal Ready <none> 64m v1.28.8-eks-ae9a62a
- Scale the number of inflate replicas up to increase workload and wait 2-3 minutes for new nodes
kubectl scale deployment inflate --replicas 5
- To verify that the deployment was scaled up successfully
kubectl get pod -n default
- You should see a result like the following showing 5 inflate pods
NAME READY STATUS RESTARTS AGE
inflate-56d689d486-kqhj2 1/1 Running 0 3m37s
inflate-56d689d486-nd89d 1/1 Running 0 3m37s
inflate-56d689d486-vv7bv 1/1 Running 0 3m37s
inflate-56d689d486-w4rbp 1/1 Running 0 3m37s
inflate-56d689d486-wzlgt 1/1 Running 0 3m37s
- Verify the number of nodes again
kubectl get nodes
- You should see a result like the following showing 3 nodes
NAME STATUS ROLES AGE VERSION
ip-192-168-185-147.us-west-2.compute.internal Ready <none> 8m27s v1.29.6-eks-1552ad0
ip-192-168-93-53.us-west-2.compute.internal Ready <none> 90m v1.29.6-eks-1552ad0
- Verify that the inflate pods are now in a running state with the new node resources
kubectl get pod -n default
- You should see a result like the following showing 5 inflate pods in a running state
NAME READY STATUS RESTARTS AGE
inflate-7d57f774d4-92njk 1/1 Running 0 87s
inflate-7d57f774d4-bm8kv 1/1 Running 0 87s
inflate-7d57f774d4-nkxg5 1/1 Running 0 87s
inflate-7d57f774d4-v8tkq 1/1 Running 0 87s
inflate-7d57f774d4-vd4xw 1/1 Running 0 87s
Recap
Congratulations! At this point, you have successfully
- Deployed and scaled a test workload to the EKS Cluster and verified that Karpenter automatically adjusted the number of nodes in the cluster.