Let’s set the scene. You deployed the NGINX ingress controller a while ago onto an AKS cluster by following the Microsoft Docs https://learn.microsoft.com/azure/aks/ingress-basic and now need to update the nginx ingress controller but add a new configuration. If you read the doc page, you will notice the helm command is not using a values file but rather using the –set switch. If you have not saved the switches you used and you just do an upgrade, you can lose your settings. You could use the –reuse-vales switch, but that does not always work. Let’s have a quick look at how to find the currently used values.
The solution
Information: to get rid of the “USER-SUPPLIED VALUES:” line all you have to do is use the -o yaml switch. I have updated the commands to include this, but I have not updated the images.
The solution is simple and built into helm already. Let’s have a look at the command now. Just make sure you change the release name and namespace to the release you are checking.
| 1 | helm get values releasename -n namespace -o yaml |
You can now see all the values that are currently being used. But wait, we have another trick up our sleeve. You can save the output to a YAML file and use that as a values file going forward. To do that you can use the following command. Again, just change the release name and namespace to match yours.
| 1 | helm get values releasename -n namespace -o yaml > values.yaml |
And there you have it a nice uncomplicated way to find out what values were used for a deployed helm chart.
I hope you found this useful. If you have any questions or comments, feel free to reach out.
About the Author
I’m Richard Hooper aka Pixel Robots. I started this blog in 2016 for a couple reasons. The first reason was basically just a place for me to store my step by step guides, troubleshooting guides and just plain ideas about being a sysadmin. The second reason was to share what I have learned and found out with other people like me. Hopefully, you can find something useful on the site.
Reference
Hooper, R., 2023, Finding out what values were used on a deployed helm chart, Pixelrobots.co.uk, Available at: https://pixelrobots.co.uk/2023/03/finding-out-what-values-were-used-on-a-deployed-helm-chart/ [Accessed on 3 July 2023]
