Book Image

Mastering Kubernetes

By : Gigi Sayfan
Book Image

Mastering Kubernetes

By: Gigi Sayfan

Overview of this book

Kubernetes is an open source system to automate the deployment, scaling, and management of containerized applications. If you are running more than just a few containers or want automated management of your containers, you need Kubernetes. This book mainly focuses on the advanced management of Kubernetes clusters. It covers problems that arise when you start using container orchestration in production. We start by giving you an overview of the guiding principles in Kubernetes design and show you the best practises in the fields of security, high availability, and cluster federation. You will discover how to run complex stateful microservices on Kubernetes including advanced features as horizontal pod autoscaling, rolling updates, resource quotas, and persistent storage back ends. Using real-world use cases, we explain the options for network configuration and provides guidelines on how to set up, operate, and troubleshoot various Kubernetes networking plugins. Finally, we cover custom resource development and utilization in automation and maintenance workflows. By the end of this book, you’ll know everything you need to know to go from intermediate to advanced level.
Table of Contents (22 chapters)
Mastering Kubernetes
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Integrating enterprise storage into Kubernetes


If you have an existing Storage Area Network (SAN) exposed over the iSCSI interface, Kubernetes has a volume plugin for you. It follows the same model as other shared persistent storage plugins we've seen earlier. You must configure the iSCSI initiator, but you don't have to provide any initiator information. All you need to provide is the following:

  • IP address of the iSCSI target and port (if not the default 3260)

  • Target's iqn (iSCSI qualified name) – typically reversed domain name

  • LUN – logical unit number

  • Filesystem type

  • Readonly Boolean flag

The iSCSI plugin supports ReadWriteOnce and ReadonlyMany. Note that you can't partition your device at this time. Here is the volume spec:

volumes:
  - name: iscsi-volume
    iscsi:
      targetPortal: 10.0.2.34:3260
      iqn: iqn.2001-04.com.example:storage.kube.sys1.xyz
      lun: 0
      fsType: ext4
      readOnly: true

Torus – the new kid on the block

CoreOS recently released Torus – a new network storage...