Kubernetes Pi Cluster release v1.9.

This might be interesting for you, if you run Kubernetes clusters on Raspberry Pies. But what's also interesting about this particular release is that they have stated the reasons for a migration from ArgoCD to FluxCD for cluster bootstrap.

(saving you a click)
Main reasons for this migration: FluxCd native support of Helm.

- ArgoCD does not use Helm to deploy applications, instead helm template command is used to generate the manifest files to be applied to the cluster. The engine used by Argo CD for applying manifests to the cluster, is not always fully compatible with all Helm possible configurations (hooks, lookups, random password) causing out-of-sync situations.

- FluxCD uses helm command to deploy Helm Charts, so Helm charts installed in this way support all the Helm-functions. Also, it eases the debugging process, because helm CLI tool can be used to see installed packages and configuration applied.

- Dependencies Definition support and improve performance in Bootstrap process.

- ArgoCD does not support application dependencies definition, only synchronization waves can be defined, so applications can be allocated to one of the synchronization waves, so some kind of bootstrapping order can be specified. The problem with this approach is that one synchronization wave cannot start till the previous one has ended successfully, making the full process take longer times.

- FluxCD support the definition of dependencies between applications so the cluster can be bootstrapped in order. Each application start its deployment as soon as all its dependencies are already synchronized, improving the time required to make a full cluster deployment.

- Avoid definition of extra-configuration in the manifest files to fix never-ending out-of-sync ArgoCD issues. Due to how Argo CD drift assessment logic certain not mandatory fields or server assigned fields are marked as out-of-synch, and they have to be configured to be ignored during the sync process.

Cluster bootstrap process using Ansible playbook has been updated to use FluxCD instead of ArgoCD

#kubernetes #argo #flux