Deploy Kustomize Kubernetes manifests

Example: Introduction to Kustomize and Sveltos

The below YAML snippet demonstrates how Sveltos utilizes a Flux GitRepository. The git repository, located at https://github.com/gianlucam76/kustomize, comprises multiple kustomize directories. In this example, Sveltos executes Kustomize on the helloWorld directory and deploys the Kustomize output to the eng namespace for every managed cluster matching the Sveltos clusterSelector.

apiVersion: config.projectsveltos.io/v1alpha1
kind: ClusterProfile
metadata:
  name: flux-system
spec:
  clusterSelector: env=fv
  syncMode: Continuous
  kustomizationRefs:
  - namespace: flux-system
    name: flux-system
    kind: GitRepository
    path: ./helloWorld/
    targetNamespace: eng

apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: flux-system
  namespace: flux-system
spec:
  interval: 1m0s
  ref:
    branch: main
  secretRef:
    name: flux-system
  timeout: 60s
  url: ssh://git@github.com/gianlucam76/kustomize

$ sveltosctl show addons
+-------------------------------------+-----------------+-----------+----------------+---------+-------------------------------+------------------+
|               CLUSTER               |  RESOURCE TYPE  | NAMESPACE |      NAME      | VERSION |             TIME              | CLUSTER PROFILES |
+-------------------------------------+-----------------+-----------+----------------+---------+-------------------------------+------------------+
| default/sveltos-management-workload | apps:Deployment | eng       | the-deployment | N/A     | 2023-05-16 00:48:11 -0700 PDT | flux-system      |
| default/sveltos-management-workload | :Service        | eng       | the-service    | N/A     | 2023-05-16 00:48:11 -0700 PDT | flux-system      |
| default/sveltos-management-workload | :ConfigMap      | eng       | the-map        | N/A     | 2023-05-16 00:48:11 -0700 PDT | flux-system      |
+-------------------------------------+-----------------+-----------+----------------+---------+-------------------------------+------------------+

Kustomize with ConfigMaps

If you have directories containing Kustomize resources, you can include them in a ConfigMap (or a Secret) and have a ClusterProfile reference it.

In this example, we are cloning the git repository https://github.com/gianlucam76/kustomize locally, and then we create a kustomize.tar.gz with the content of the helloWorldWithOverlays directory.

$ git clone git@github.com:gianlucam76/kustomize.git 

$ tar -czf kustomize.tar.gz -C kustomize/helloWorldWithOverlays .

$ kubectl create configmap kustomize --from-file=kustomize.tar.gz

The below ClusterProfile will use the Kustomize SDK to get all the resources needed for deployment. Then will deploy these in the production namespace of the managed clusters with the Sveltos clusterSelector set to env=fv.

apiVersion: config.projectsveltos.io/v1alpha1
kind: ClusterProfile
metadata:
  name: kustomize-with-configmap 
spec:
  clusterSelector: env=fv
  syncMode: Continuous
  kustomizationRefs:
  - namespace: default
    name: kustomize
    kind: ConfigMap
    path: ./overlays/production/
    targetNamespace: production

$ sveltosctl show addons
+-------------------------------------+-----------------+------------+---------------------------+---------+-------------------------------+--------------------------+
|               CLUSTER               |  RESOURCE TYPE  | NAMESPACE  |           NAME            | VERSION |             TIME              |     CLUSTER PROFILES     |
+-------------------------------------+-----------------+------------+---------------------------+---------+-------------------------------+--------------------------+
| default/sveltos-management-workload | apps:Deployment | production | production-the-deployment | N/A     | 2023-05-16 00:59:13 -0700 PDT | kustomize-with-configmap |
| default/sveltos-management-workload | :Service        | production | production-the-service    | N/A     | 2023-05-16 00:59:13 -0700 PDT | kustomize-with-configmap |
| default/sveltos-management-workload | :ConfigMap      | production | production-the-map        | N/A     | 2023-05-16 00:59:13 -0700 PDT | kustomize-with-configmap |
+-------------------------------------+-----------------+------------+---------------------------+---------+-------------------------------+--------------------------+