Tag: kubernetes

Total 19 Posts
kubernetes, descheduler

Meet a Kubernetes Descheduler

The kube-scheduler is a component responsible for scheduling in Kubernetes. But, sometimes pods can end up on the wrong node due to Kubernetes dynamic nature. You could be editing existing resources, to add node affinity or (anti) pod affinity, or you have more load on some servers and some are running almost on idle. Once the pod is running kube-scheduler will not try to reschedule it again. Depending on the environment you might have a lot of moving parts. In ...

kubernetes, efk, monitoring, logs

Get Kubernetes Logs with EFK Stack in 5 Minutes

Last week I wrote about getting Kubernetes cluster metrics with Prometheus. Metrics are only one part of the story. Logs are important and luckily we have a great set of tools that will help you to create simple and easy logging solution. In this post, I will show you how to start monitoring Kubernetes logs in 5 minutes with EFK stack (Elasticsearch, Fluent Bit, and Kibana) deployed with Helm and operators. Previous post Just blogged: Get #Kubernetes Cluster Metrics with ...

kubernetes, prometheus, monitoring, metrics

Get Kubernetes Cluster Metrics with Prometheus in 5 Minutes

Having a Kubernetes cluster up and running is pretty easy these days. But, when you start to use the cluster and deploy some applications you might expect some issues over time. Kubernetes being a distributed system is not easy to troubleshoot. You need a good monitoring solution and because the Prometheus is CNCF project as Kubernetes it is probably the best fit. In this post, I will show you how to get the Prometheus running and start monitoring your Kubernetes ...

kubernetes, persistent storage

Kubernetes Persistent Volumes with Deployment and StatefulSet

I get a lot of questions about Kubernetes and persistence. Of course, persistence is important for stateful apps. We often say that for stateful apps you need to use StatefulSet and for stateless apps Deployment. This doesn't mean that you couldn't use deployment to define stateful apps with persistent volumes. For example, the official MySQL Helm chart is using deployment. So, it can be done, but users get confused about this. What is the deal? When should you use deployment ...

kubernetes, drone, ci/cd, pipeline

Set Up a Drone CI/CD Pipeline with Kubernetes

I like to say that continuous delivery or CD is the most important part of Cloud Native. There are so much great tools out there and you need to pick up the right ones. A few weeks ago I was writing almost about the same topic, only with Jenkins. While the Jenkins is the most used CI/CD tool, not every team is happy with it. Jenkins has a huge number of plugins and the great set of features, but ...

kubernetes, ceph, persistent storage

Using Existing Ceph Cluster for Kubernetes Persistent Storage

I wrote about Rook storage a few weeks ago, but maybe you already have Ceph cluster running in your datacenter. Or you prefer to use Ceph on separate nodes and without Kubernetes. Also, currently Rook is alpha software and not ready for production use. I would assume that this large Ceph cluster if you have one, is also used for other services outside Kubernetes. Whatever is the case it is simple to connect Ceph and Kubernetes together to provision persistent ...