You're reading from Learn Helm

Product typeBook

Published inJun 2020

PublisherPackt

ISBN-139781839214295

Edition1st Edition

Tools

Kubernetes

Concepts

Containerization

Authors (2):

Andrew Block

Austin Dewey

View More author details

Improving the Guestbook Helm chart

The chart created in the previous section was able to successfully deploy the Guestbook application. However, as is the case with any type of software, the Helm chart can always be improved. In this section, we will focus on the following two features that will improve the guestbook chart:

Life cycle hooks to back up and restore the Redis database
Input validation to ensure only valid values are provided

Let's focus first on adding life cycle hooks.

Creating pre-upgrade and pre-rollback life cycle hooks

In this section, we will create two life cycle hooks, as follows:

The first hook will occur in the pre-upgrade life cycle phase. This phase takes place immediately after the helm upgrade command is run, but before any Kubernetes resources become modified. This hook will be used to take a data snapshot of the Redis database before performing the upgrade, ensuring that the database is backed up in case the upgrade...

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Learn Helm

Published in: Jun 2020Publisher: PacktISBN-13: 9781839214295

Authors (2)

Andrew Block

Andrew Block is a core maintainer on the Helm project and a Distinguished Architect at Red Hat. He specializes in the use of continuous integration and continuous delivery methodologies to streamline the delivery process and incorporate security at each stage. He works with organizations to adopt and implement these technologies and concepts within their organization. As an open source enthusiast, Andrew not only has authored several publications, but he is also a contributor to several open source communities and a lead within the sigstore project, which aims at simplifying how software is signed and verified.
Read more about Andrew Block

Austin Dewey

Austin Dewey is a DevOps engineer focused on delivering a streamlined developer experience on cloud and container technologies. Austin started his career with Red Hat's consulting organization, where he helped drive success at Fortune 500 companies by automating deployments on Red Hat's Kubernetes-based PaaS, OpenShift Container Platform. Currently, Austin works at fintech start-up Prime Trust, where he builds automation to scale financial infrastructure and supports developers on Kubernetes and AWS.
Read more about Austin Dewey

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