In this post I will show how to install the Podman container tool on RHEL8 based systems.
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bookmark_borderPodman: A start point
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bookmark_borderKubernetes backup with Velero and Ceph
Velero is a tool that enables backup and restore Kubernetes cluster resources and persistent volumes. It simplifies the task of taking backups/restores, migrating resources to other clusters, and replication of clusters.
- Stores Kubernetes resources in highly available object stores (S3, GCS, Blob Storage, etc.)
- Backs up PVs / PVCs using cloud providers’ disk capture mechanism
- Scheduling backups with a syntax cron
- Rotation of automatic backups with TTL (Time to Live)
- Supports community-enhanced plugins
bookmark_borderKubernetes : Using Ceph RBD as Container Storage Interface (CSI)
Kubernetes Pods with persistent volumes are important for data persistence because containers are being created and destroyed, depending on the load and on the specifications of the developers. Pods and containers can self-heal and replicate. They are, in essence, ephemeral.
Before start this post I’ve been posted some hands on and conceptual docs to understand since the beginning this solution.
- Kubernetes: An Overview.
- Kubernetes: Ansible deployment.
- Ceph : An Overview.
- Ceph : Ansible deployment.
bookmark_borderCeph : An overview
Ceph is open source, software-defined storage maintained by RedHat. It’s capable of block, object, and file storage. The clusters of Ceph are designed in order to run on any hardware with the help of an algorithm called CRUSH (Controlled Replication Under Scalable Hashing). This algorithm ensures that all the data is properly distributed across the cluster and data quickly without any constraints. Replication, Thin provisioning, Snapshots are the key features of the Ceph storage.
There are good reasons for using Ceph as IaaS and PaaS storage :
- Scale your operations and move to market faster.
- Bridge the gaps between application development and data science.
- Gain deeper insights into your data.
- File, block and Object storage in the same wrapper.
- Better transfer speed and lower latency
- Easily accessible storage that can quickly scal up or down .
Site : https://ceph.io/
Continue reading “Ceph : An overview”bookmark_borderCeph : Cluster deployment
In this post will be presented how to deploy the environment by ceph ansible.
An ansible deployment is the most standardized and official format among the main vendors using Ceph. Ex: Suse, Oracle and Redhat.
The installation presented in this document will use a similar flow for deploying:
If you would like to get an overview about Ceph these document could help you.
Continue reading “Ceph : Cluster deployment”bookmark_borderKubernetes : Deploy a production ready cluster with Ansible.
Kubesray is a group of Ansible playbooks for deployment a Kubernetes cluster in most metal and most clouds.
Official site: https://kubespray.io/
As described by project git repository :
- Can be deployed on AWS, GCE, Azure, OpenStack, vSphere, Packet (bare metal), Oracle Cloud Infrastructure (Experimental), or Baremetal
- Highly available cluster
- Composable (Choice of the network plugin for instance)
- Supports most popular Linux distributions
- Continuous integration tests
My intention for this lab is show a deployment on premisses environment, so if you found this post directly without had a Kubernetes background maybe this overview can help you.
Continue reading “Kubernetes : Deploy a production ready cluster with Ansible.”bookmark_borderKubernetes: An Overview
Kubernetes is a powerful open-source system, initially developed by Google, for managing containerized applications in a clustered environment. It aims to provide better ways of managing related, distributed components and services across varied infrastructure.
We talk about system architecture and how it solves problems with use cases to handle containerized deployments and scaling.
Kubernetes official site : https://kubernetes.io/
Continue reading “Kubernetes: An Overview”