Can K3s Installed Traefik Be Updated Independently Through Helm?

If k3s installs Traefik and flags it as a helm chart, can the application be updated independently through helm commands without encountering errors related to CRD resources not found in version Kubernetes v1.16+ or beyond?

Yes! However, due to changes introduced upstream for Traefik’s Custom Resource Definitions (CRD) from apiextensions.k8s.io/v1beta1 in versions older than Kubernetes v1.16+ towards the new ones managed by Rancher and documented within Traefik.

Here’s how to properly update Traefik on a k3s environment:

Step 1 - Install New CRD & RBAC for Kubernetes v1.16+

Firstly, ensure that you have the latest definitions and necessary permissions installed with these commands:

$ kubectl apply -f [URL_TO_NEW_CRDS] # Example URL provided in document to download crds definition files
$ kubectl apply -f [URL_TO0T_RBAC_FILES]  # Download the necessary RBAC configs for Traefik installation and management. Replace with actual URLs from your source documents or repositories.

Make sure these commands are executed within a k3s environment where Helm is already integrated, to avoid version mismatches between Kubernetes versions used by k3s and those needed post-update of CRD definitions and RBAC setup for Traefik on the cluster.

Step 2 - Upgrade Traefik Using Helm

Once you have set up these prerequisites, reinstalling or upgrading your application using helm is straightforward:

$ helm repo add traefik https://traefik.github.io/charts --if-present  # Ensure the Traefik chart repository has been added if not already done so via a Helm installation process specific to `k3s` setups or manual addition of repositories as necessary for your cluster's configuration
$ helm repo update                            # Refresh local charts list from remote sources, ensuring you have access to the latest releases
$ helm upgrade traefik traefik/traefik -n kube-system  --force   # Perform an installation or a forceful rollout of Traefik on your cluster namespace 'kube-system' (or appropriate namespaces if applicable) with Helmed tooling. The `--force` flag is used here for complete overwriting the existing resources, which may be needed when working within new CRD definitions

By running these steps in sequence and following proper permissions setup using RBAC roles as outlined by Traefik documentation or your specific k3s-based Helm configurations. You’re expected to observe a successful upgrade process without encountering the previous issue of missing mapping resources, since you are now aligned with CRD standards required for newer versions beyond Kubernetes v1.16+.

Optional Step - Clean-Up Deprecated Traefik Resources:

For cleanlininw and maintainability reasons after a successful upgrade process where the previously used traefik Helm release has been updated, you may choose to remove old deployments of CRD resources if they are no longer required. This can be done with this command:

$ helm delete traefik-crd -n kube-system  # Delete the deprecated crd deployment for `traefik` created by Helmed releases prior to applying new definitions and RBAC settings; ensure not deleting resources that your application relies on. Note this step is optional based upon personal needs or policies of maintaining historical records within a Kubernetes cluster environment

Remember, each command must be run inside the appropriate context where helm was installed for managing deployments in relation to Traefik and possibly with specific Helm values configured per your application’s requirements. The focus here is on an independent update of Helmed-managed services within a containerized Kubernetes environment provided by k3s, facilitating dynamic configuration without the need for extensive downtime or manual intervention beyond what’s necessary to align with current standards and tooling expectations from Helm.

Remember that each section contains essential comments in markdown which clarify why specific actions are being performed at every step along this independent updating process, providing clarity on prerequisites for successful execution within k3s infrastructure management using helm tools with Traefik applications as an example use case.