Teach me Kubernetes - Part 1 - Overview
Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. …
Read Article →Kubernetes
78 articles about kubernetes development, tools, and best practices
Types of communication in Amazon EKS
There are multiple types of communication in Amazon EKS environments. Lines of communication include the following:
- Interpod communication between …
How to Install App Mesh on AWS EKS
You can follow the steps below to install App Mesh on AWS EKS (Kubernetes).
Step 1 – Prerequisites
curl -o pre_upgrade_check.sh …[Solved] Kubernetes Namespace stuck in Terminating state
If you have tried to delete a Kubernetes namespace, and it has been hanging in ‘deleting’ for hours on end, it’s likely that you have …
Read Article →[Solved] Error creating: pods “my-service-a-xxx” is forbidden: error looking up service account my-apps/my-service-a: serviceaccount “my-service-a” not found
So you’ve run a deployment and tried to check the pods and there’s nothing there!
kubectl get pods
Next step is to see what’s …
Read Article →How to Force a Redeploy in Kubernetes
If you need to force a redeploy of a deployment in Kubernetes, then you can use the rollout feature.
You may have an image that has been updated, but …
Read Article →How to Restart a Deployment in Kubernetes
If you need to restart a deployment in Kubernetes, perhaps because you would like to force a cycle of pods, then you can do the following:
Step 1 – …
Read Article →How to Create a Horizontal Pod Autoscaler in Kubernetes
If you could like to a create a Horizontal Pod Autoscaler (hpa) in Kubernetes, then you could run the following:
Step 1 – Create a Deployment
If you …
Read Article →How to Run a Load Generator on Kubernetes
If you would like to test hpa, Horizontal Pod Autoscaling, or throw some chaos at a specific deployment in Kubernetes, then you could run a Load …
How to Deploy a Metrics Server in Kubernetes
If you would like to deploy a Metrics Server in Kubernetes, then you first need to create a namespace for it to live it, followed by installing the …
Read Article →How to create an AWS EKS cluster using eksctl
eksctl dramatically simplifies the creation of AWS EKS clusters, by providing a simple command-line interface.
Step 1 – Define a Cluster YAML
You can …
Read Article →How to automatically generate a Manifests file in Kubernetes
If you want to automatically generate a manifest file in Kubernetes, you can do so by using the kubectl run command coupled with a --dry-run to output …
How to Sort Pods by CreationTimestamp in Kubernetes
If you need to sort a list of your pods by their CreationTimestamp, then do the following:
kubectl get pods -n kube-system …How to Jump onto a Kubernetes Pod with Bash
If you want to jump onto a particular Kubernetes Pod and run Bash within it, you can do so as follows:
kubectl exec -ti <pod_name> /bin/bash
You …
Read Article →How to run Shell Commands in a Kubernetes Cluster
If you would like to run shell commands inside of your Kubernetes cluster, then you can use the kubectl run command.
What the syntax looks like …
Read Article →How to Update Kubectl Config from AWS EKS
Ever searched for kubectl update config from aws eks and needed a quick result?
Step 1 – Validate AWS CLI
Make sure that you have valid AWS …
Read Article →[Solved] Unable to connect to the server: dial tcp: lookup with AWS EKS
If you have received the following error while trying to issue commands to kubectl:
Unable to connect to the server: dial tcp: lookup
Then it may be …
Read Article →How to Deploy a Docker Container to Kubernetes
Once you have a Docker container, it is really simple to deploy containers to Kubernetes.
Generate a Deployment YAML
kubectl provides a fantastic way …
How to Delete a Secret in Kubernetes
Once you have a secret in Kubernetes, if you know it’s name, you can delete it.
How to find the secret name
You can get the secret name as …
Read Article →How to Decode a Secret in Kubernetes
Secrets in Kubernetes are encoded using base64.
If you have the secret name, you can ask for its value. If not, then learn how to get a secret in …
Read Article →How to Verify a Secret in Kubernetes
You have created a secret, and would like to retrieve it.
Get a list of all the secrets in Kubernetes
kubectl get secrets
This will result in:
NAME …How to Create a Secret in Kubernetes
Secrets allow applications to not hardcode usernames, passwords or additional information such as hostnames, IP addresses or other protected/sensitive …
How to Expose your App through a Service in Kubernetes
Once you have deployed an application into Kubernetes, it will not be available to the outside world.
For this to be possible, you need to expose it …
Read Article →How to connect to Bash on a Kubernetes pod
If you find yourself needing to jump into a Kubernetes pod to either diagnose an issue, or run a particular command, you can use the bash connectivity …