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Status Future consideration
Workspace Turbonomic ARM
Created by Guest
Created on Jul 26, 2022

Update kubernetes certificate when an instance is upgraded (OVA only issue)

I recently had an issue with a large financial customer where I made a license change and it caused the instance to show that none of the targets were validated any longer. After some troubleshooting, I found a certificate had expired. We worked with support to get it renewed and the instance came back up with all targets validated. When I asked how we could keep the certificate from expiring and taking down a production instance, the only answer was to figure out when it expires and mark it on your calendar to renew it before that date, as there is a script to run that renews it. In discussion with support, they agreed that this is not ideal and that it should be part of the upgrade process. When an instance is upgraded this script should run. Most everyone upgrades at least every year, so this should prevent what happened to me from happening with other customers. Cisco TAC SR 693934805
Idea priority Medium
  • Admin
    Mitchell Lau
    Sep 21, 2022

    We had a meeting today with Billy and Jet to discuss incorporating the certificate renewal script into the online/offline upgrades. Billy has mentioned that the OVA upgrades are intended for upgrading Turbo components only and we should not add the certificate renewal to the Turbo upgrade script.

    However, Jet has mentioned that he has encountered some issues with the kubeNodeCertUpdate.sh, where he has to reach out to Support because the cert update script did not move the files to the right location. As a next step, Jet is going to share the details of the cert update script issue and include info on the steps that Support used to solve the problems. Once we are clear on the issues, the kubeNodeCertUpdate.sh can be enhanced address those problems.

  • Guest
    Sep 2, 2022

    Hi Mitchell:
    The k8s certificate renewal script is here: https://github.com/turbonomic/t8c-install/blob/master/bin/kubeNodeCertUpdate.sh

    In my opinion the script above should be included as part of doing online or offline upgrades using the scripts below:

    Online: https://github.com/turbonomic/t8c-install/blob/master/bin/onlineUpgrade.sh

    Offline: https://github.com/turbonomic/t8c-install/blob/master/bin/offlineUpdate.sh

    A further nice to have would be for the MariaDB upgrade to be included in the upgrade scripts above as well to have the MariaDB upgraded in the OVA when it is needed which that script is here:
    https://github.com/turbonomic/t8c-install/blob/master/bin/mariadbUpgrade.sh

    Thanks,

  • Admin
    Mitchell Lau
    Sep 2, 2022

    Russ and Jason - Can you attach a copy of the script please?

  • Guest
    Aug 25, 2022

    Hi Mitchell, this is only for the OVA when doing upgrades since it is a Turbo created single node cluster in the OVA. Deployments into k8s have their own certificates in the cluster that Turbo won't need to manage during upgrades as we don't deploy them in that case.

  • Admin
    Mitchell Lau
    Aug 25, 2022

    Thanks Jason for clarifying. Yes, I think it makes sense to proactively check for certificate expiry. You mentioned about the OVA in the comments, do we also to have the same check for K8S deployments as well? Wanted to see if this is a generic issue or only for OVA deployments.

  • Guest
    Aug 15, 2022

    Hi Mitchell, yes there was a misunderstanding between what I wrote and you interpreted as. It is as the guest replied below.

  • Guest
    Aug 9, 2022

    Hi Mitchell, this is only related to the kubernetes certificate expiring every year and there is no warning before it expires. Currently the only check for this is the upgrade-precheck script. This Idea is to have the k8s certificate renewal process in the OVA done as part of upgrades to prevent this from happening going forward and causing the instance to be down without warning

  • Admin
    Mitchell Lau
    Aug 8, 2022

    We have a health check feature where the UI alerts the user when the targets are not validating. It is also available via Turbo API so that user can check the target validation status in an automated fashion. Any reason why the customer is not using this feature?