VMware Carvel Community Meetings, 25 Apr 2021

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From YouTube: Carvel KubeCon + CloudNativeCon Europe 2021 Demo

Description

Carvel maintainer, Dmitriy Kalinin, demo's how to use the Carvel tool suite to install Wordpress MySQL, one of the examples under the Kubernetes GitHub repo: https://github.com/kubernetes/examples/tree/master/mysql-wordpress-pd

This demo is featured at the VMware virtual booth at KubeCon + CloudNativeCon Europe 2021.

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Hey folks, we're going to use carvel tool suite to install wordpress and mysql on kubernetes, it's one of the examples under kubernetes examples: github repo, uh let's first start with downloading a portion of that repo into a little directory config upstream over here. Once we've downloaded this portion of the repository, it will look something like this. We also have a little overlay file with ytt. We are adding a secret, we are changing the service and we are also removing persistent volume. This is to avoid modifying the original yamls.

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Now that we have configuration figured out, let's also record which images are being used in this configuration that way, we will make sure that images are being used every single time. The same ones are being used same time, so we have digests uh for mysql and we have digest for wordpress.

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Now that we have all of this configuration logged down, we will push that configuration bundle into a docker repository because bundle.

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And we will get a reference from image package: let's grab this reference and place that into the app cr app cr is a resource that allows us to specify uh how the application should be fetched, templated and ultimately deployed. Let's go ahead and put that into a cluster.

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After a few seconds, we should see that the application successfully reconciles there is reconcile successful, and we can also see that the resources for that applications are available inside the cluster. Now the fun part here is that if we want to deploy this application multiple times, we can of course apply app cr multiple times with a few modifications with a different name. However, uh it might be useful to hide this configuration from the user that actually installs the application. Let's go ahead and grab this url and create another cr called package cr.

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This represents a particular version of the application, so wordpress1o, for example, let's apply that to our cluster.

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Now that we have this package, we can actually install this application twice, and this is done. We installed package cr, so let's go ahead and apply that temp kc 3 installed, and we can see now that the installed packages are on the cluster across in all namespaces.

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Thank you very much uh talk to us on slack or in our session bye.