kubernetes | braindose

Kubernetes Disaster Recovery

Posted on November 24, 2022November 24, 2022 by CK Gan

The Kubernetes ETCD database can be easily backup and restored by using the etcd commands such as etcdutl or etcdctl. However there are no proper documented procedure on how to restore the control planes together with the ETCD. There are many posts out there but none of them solve my problem. In the past, I spent amount of time to recreate the entire Kubernetes cluster because I was not able to properly bring up the Kubernetes cluster due to unforeseen problems, with ETCD restored. This is the first time I managed to recover my Kubernetes cluster without rebuild the entire cluster. Let’s take a look how this can be done.

Monitor and Analyse Nginx Ingress Controller Logs using Kibana and ElasticSearch

Monitor and Analyze Nginx Ingress Controller Logs on Kubernetes using ElasticSearch and Kibana

Posted on July 18, 2022July 18, 2022 by CK Gan

We are going to learn how to deploy and configure Fluent Bit (a sub-project of FluentD) to capture the Nginx Ingress Controller logs on Kubernetes and stream the formatted logs to ElasticSearch. We can then perform the logs analytics using Kibana.

Automate Kubernetes etcd Data Backup

Posted on February 9, 2022February 9, 2022 by CK Gan

When come to operating Kubernetes, we need to ensure the cluster backup is one of the key operation as part of our backup strategy. We need to properly backup and secure the application data which is typically stored in persistent volumes. On the other hand, we need to backup the etcd data because it is the operational data store that is used by Kubernetes in order to operate accordingly. In this post we are looking at how to schedule the etcd data backup using out of the box Kubernetes features.

K8s on RPi 4 Pt. 5 – Exposing Applications to the World

Posted on January 17, 2022January 17, 2022 by CK Gan

There are a few approaches to expose your applications to the world outside of Kubernetes cluster. One of them is using Ingress Controller. We are going to learn how can we use Nginx Ingress Controller to expose container applications running on top of Raspberry Pi Kubernetes cluster.

K8s on RPi 4 Pt. 4 – Configuring Kubernetes Storage

Posted on January 12, 2022August 19, 2022 by CK Gan

In a perfect world, we would prefer to implement microservices to be stateless. This stateless approach eliminates a lot of problems towards maintaining the storage for the applications data. However, we are not in a perfect world. At most time, applications need to deal with data and keep them on storage for long term references. We need persistent storage solution so that the applications data can survive containers (or systems) restart or crash. Kubernetes provides this type of storage support in the concept of volumes. We are going to look at how can we configured storage for Kubernetes on Raspberry Pi 4.