Troubleshooting See my previous article : here. POD and Container Introspection List the current pods kubectl get pods Describe pod kubectl describe pod <name> Delete pod kubectl delete pod <name> Watch nodes continuously kubectl get nodes -w Cluster Introspection Get cluster information kubectl cluster-info Get the configuration kubectl config view Get information on a node kubectl …
In this article, we will see together different ways to reduce your docker images size. Having small images will let you deploy and transfer them fast. How to select proper images DockerHub It’s important to remember that you should choose proper images before starting reducing images. If you select it on DockerHub, please check that …
Introduction As discussed several times through my articles (i.e Docker), containers are now very popular and a lot of development and programs are moved to them. You can see on this graph Docker popularity over yeards : However, in some case, using VM still makes sense ! We will try to compare both technologies and find …
Kubernetes Series : How to choose between VMs and Containers ? Read More »
Introduction In this article we will see 2 great tools I like to use. The first one is called K9S, which is a CLI that will help you to manage your Kubernets clusters. The second one is called Lens, an IDE to deal with Kubernetes clusters on a daily basis. K9S K9s provides a curses …
Introduction In this article we will see how to get logs and how to monitore a Kubernetes cluster. Troubleshooting Troubleshoot Clusters The first thing to do is to list your cluster and check if everything is registered correctly : And verify that all of the nodes you expect to see are present and that they …
Kubernetes Series : Monitoring, Logging and Debugging Read More »
Introduction In this new article we discuss about Ingresses. What is an Ingress ? An Ingress is basically the URL which will be used to reach your app. It exposes HTTP and HTTPS routes from outside the cluster to services within the cluster. Traffic routing is controlled by rules defined on the Ingress resource. internet | [ …
Introduction In this new article we discuss about Network Policies. What is a Network Policy ? A network policy is a specification of how groups of pods are allowed to communicate with each other and other network endpoints. NetworkPolicy resources use labels to select pods and define rules which specify what traffic is allowed to the selected pods. How …
Introduction In this new article we discuss about Services. What is a Service ? Once you have deployed your pods or deployments, you may want to be abel to configure a frontend which will find out and keep track of which IP address to connect to, so that the frontend can use the backend part …
Introduction In this new article we discuss about ReplicaSets. What is a ReplicaSet ? A ReplicaSet’s purpose is basically to maintain a stable set of replica Pods running at any given time. As such, it is often used to guarantee the availability of a specified number of identical Pods. For example, if we only have …
Introduction In this new article we discuss about Deployments. What is a Deployment? An entity called “ReplicaSet” ensures that a specified number of pod replicas are running at any given time. However, a Deployment is a higher-level concept that manages ReplicaSets and provides declarative updates to Pods along with a lot of other useful features. Therefore, …