EKS cluster creation in AWS - Step-by-Step Execution

Process Flow - EKS cluster creation

Start: Define cluster config

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Create VPC and networking

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Create EKS cluster control plane

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Create worker nodes (EC2 or Fargate)

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Join nodes to cluster

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Cluster ready for workloads

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End

This flow shows the main steps to create an EKS cluster: define config, set up networking, create control plane, add worker nodes, then the cluster is ready.

Execution Sample

AWS

eksctl create cluster --name my-cluster --region us-west-2 --nodes 2

This command creates an EKS cluster named 'my-cluster' in the us-west-2 region with 2 worker nodes.

Process Table

Step	Action	Status	Details	Result
1	Parse command and config	Success	Cluster name=my-cluster, region=us-west-2, nodes=2	Ready to create resources
2	Create VPC and networking	Success	VPC with subnets and security groups created	Networking ready
3	Create EKS control plane	In Progress	Provisioning control plane in AWS	Control plane creating
4	Control plane active	Success	Control plane endpoint available	Control plane ready
5	Create worker nodes	In Progress	Launching 2 EC2 instances for nodes	Nodes provisioning
6	Nodes joined cluster	Success	Nodes registered and ready	Cluster nodes ready
7	Cluster creation complete	Success	Cluster is active and ready for workloads	EKS cluster ready

💡 Cluster creation completes when control plane and nodes are active and joined

Status Tracker

Variable	Start	After Step 2	After Step 4	After Step 6	Final
VPC	None	Created	Created	Created	Created
ControlPlaneStatus	None	None	Active	Active	Active
WorkerNodesCount	0	0	0	2	2
ClusterStatus	Not created	Not created	Not created	Active	Active

Key Moments - 2 Insights

Why does the cluster status remain 'Not created' until after worker nodes join?

The cluster is considered fully ready only after both the control plane is active and worker nodes have joined, as shown in execution_table rows 4 and 6.

What happens if the VPC creation fails at step 2?

Subsequent steps cannot proceed because networking is required for the control plane and nodes, so the process stops early as indicated by the status in execution_table row 2.

Visual Quiz - 3 Questions

Look at the execution table, at which step does the control plane become active?

A Step 3

B Step 5

C Step 4

D Step 6

💡 Hint

Check the 'ControlPlaneStatus' and 'Status' columns in execution_table row 4.

According to variable_tracker, how many worker nodes exist after step 6?

A 1

B 2

C 0

D Not defined

💡 Hint

Look at the 'WorkerNodesCount' row under 'After Step 6' in variable_tracker.

If the VPC creation failed, what would happen to the cluster creation process?

A It would stop before creating the control plane

B It would continue creating the control plane

C It would create worker nodes only

D It would complete successfully anyway

💡 Hint

Refer to key_moments explanation about step 2 failure and execution_table row 2.

Concept Snapshot

EKS cluster creation steps:
1. Define cluster config (name, region, nodes)
2. Create VPC and networking
3. Create EKS control plane
4. Launch worker nodes
5. Nodes join cluster
6. Cluster ready for workloads
Use 'eksctl create cluster' for simple setup.

Full Transcript

Creating an EKS cluster involves several steps. First, you define the cluster configuration such as name, region, and number of nodes. Then, the system creates the necessary networking components like VPC and subnets. Next, the EKS control plane is provisioned and becomes active. After that, worker nodes are launched and join the cluster. Once nodes are registered, the cluster is ready to run workloads. If any step like VPC creation fails, the process stops early. The command 'eksctl create cluster' automates these steps for you.