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Hi there, I'm a prior hybrid network engineer transformed cloud engineer, and I enjoy writing posts about my technical journey including implementation guides, insights, tips, scripts and graphics from what I've gleaned along the way.
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Perform checkouts against your AWS Kubernetes cluster before and after implementing changes such as upgrades by using my latest Bash shell script! I took my AKS checkouts script from a couple of weeks ago and converted it into an EKS checkouts script 😎
This script performs the following tasks:
✅ Sets the kubeconfig context based on the provided cluster name (names must match)
✅ Display addresses of the master and services
✅ Checks the k8's version running on both the control plane and the nodes
✅ Checks supported EKS versions
✅ Lists all nodes and their status, age and version
✅ Display custom columns for pods with node, pod, namespace, status, and age
✅ Output count for total # pods running
✅ Gets all pods in the cluster, loops through each and runs a verbose describe outputting values from Node to Status
Link to the script: https://github.com/jksprattler/kubernetes/blob/main/eks/scripts/eks-checkouts.sh
The script output can be useful during instances where you need to submit a vendor ticket for troubleshooting. I'll also be including the output in my internal ticket tracking upgrades to validate it was completed.
Here's some sanitized sample output with redactions for brevity from running the script:
❯ ./eks-checkouts.sh --help
Usage: ./eks-checkouts.sh <cluster-name> <region> <aws-profile>
❯ ./eks-checkouts.sh my-cluster my-region my-profile
Switched to context "my-cluster".
########################################################
Kubernetes control plane is running at https://my-cluster.gr7.my-region.eks.amazonaws.com
CoreDNS is running at https://my-cluster.gr7.my-region.eks.amazonaws.com/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
########################################################
Control Plane Version:
Client Version: v1.23.6
Server Version: v1.23.17-eks-0a21954
########################################################
Cluster Version: v1.23.16-eks-48e63af
Cluster Status: ACTIVE
########################################################
Available EKS versions:
1.22
1.23
1.24
1.25
1.26
1.27
########################################################
NAME STATUS ROLES AGE VERSION
ip-my-node.my-region.compute.internal Ready <none> 73d v1.23.16-eks-48e63af
ip-my-node.my-region.compute.internal Ready <none> 73d v1.23.16-eks-48e63af
#### Redacted for brevity ####
########################################################
NODE POD NAMESPACE STATUS AGE
ip-my-node.my-region.compute.internal aws-node-zs123 kube-system Running 2023-03-24T18:35:15Z
#### Redacted for brevity ####
########################################################
Total number of pods running: 163
########################################################
Checking pod: cert-manager/cert-manager-12345678-45svg
Node: ip-my-node.my-region.compute.internal/ip-my-node
Start Time: Thu, 16 Mar 2023 06:25:19 -0500
Labels: app=cert-manager
app.kubernetes.io/component=controller
app.kubernetes.io/instance=cert-manager
app.kubernetes.io/name=cert-manager
app.kubernetes.io/version=v1.8.2
pod-template-hash=12345678
Annotations: kubernetes.io/psp: eks.privileged
prometheus.io/path: /metrics
prometheus.io/port: 9090
prometheus.io/scrape: true
Status: Running
########################################################
#### Redacted for brevity ####
Since I'm performing upgrades to my EKS clusters this week, I decided to put this script together and share it! Enjoy!