Minikube is a single-node Kubernetes cluster that can be installed on macOS, Linux and Windows. It lets you to try out Kubernetes locally on your personal computer or use it for daily development work. In this note i will show how to install Minikube & Kubectl on Windows and deploy a first “Hello Minikube” application […]
kubernetes
This computer doesn’t have VT-X/AMD-v enabled
During the first attempt to start Minikube you may receive the following error: “This computer doesn’t have VT-X/AMD-v enabled“. This error may occur even if virtualization is enabled in BIOS and you don’t have any issues with creating and running the virtual machines on your computer. This note shows a fast workaround of the error: […]
Kubectl: Debug – Increase Verbosity
While troubleshooting Kubernetes-related issues it is useful to know how to increase the verbosity level of the main debugging tool – the kubectl command. The verbosity of the kubectl command is controlled by the -v or –v flags followed by an integer from 0 to 9 that represents the log level. In this note i […]
Kubectl Apply – All Files in Directory
kubectl apply command is used to manage applications by creating and updating Kubernetes resources declared in configuration files. In addition to possibly to manage resources through individual files, there is a way to apply all the YAML files in a folder. In this short note i will show how to use the kubectl apply command […]
Kubectl: Create Deployment – Command Line
In this note i will show how to create a Deployment from the command line using the kubectl command. Below you will find the examples of how to deploy an Nginx Docker image on a Kubernetes cluster and how to update and scale it using the kubectl command only (without YAML configs). I will also […]
Minikube: Start With More Memory & CPUs
Minikube is a single-node Kubernetes cluster that can be installed on macOS, Linux and Windows. By default, it starts with 2 CPUs and 2GB of memory, that may not be enough for experiments with some heavy projects. This note describes 3 easy ways to start the Minikube with more memory and CPUs.
Kubectl: Get Pod Logs – Tail & Follow
Application logs can be retrieved from a Pod in Kubernetes using kubectl command. In this note i will show how to get logs from a running Pod (including all replicas) and a previously crashed Pod. I will also show how to tail and follow logs from a Pod using kubectl command.
Kubectl: Get Deployments – Kubernetes
A Deployment in Kubernetes is the process of providing declarative updates to Pods. It allows to declare the desired state in the manifest (YAML) file, and the controller will change the current state to the declared state. Deployments can scale the number of replica Pods, enable rollout of updated code in a controlled manner, or […]
Kubectl: Get Services – Kubernetes
In Kubernetes, a Service is an abstraction which represents a logical set of Pods and a policy by which to access them. Although each Pod has a unique IP address, those IPs are not exposed outside the cluster without a Service. The point is that Pods in Kubernetes are “mortal” – every time a Pod […]
Kubectl: List & Change Namespaces – Kubernetes
Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters in Kubernetes are called Namespaces. The Namespaces allow to partition physical resources into the logically named groups, allowing a Kubernetes cluster to share resources between multiple groups. In this note i will show how to get the current Namespace, list all […]