A Jsonnetcontroller. It can fetch Jsonnet files from:
- Flux Sources (GitRepository/OCIRepository/Bucket)
- ConfigMap/Secret
process those files programmatically invoking jsonnet go module and store the output in its Status section. Sveltos addon-manager can then be used to deploy the output of the jsonnet-controller in all selected managed clusters.
kubectl apply -f https://raw.githubusercontent.com/gianlucam76/jsonnet-controller/main/manifest/manifest.yamlor if you want a specific version
kubectl apply -f https://raw.githubusercontent.com/gianlucam76/jsonnet-controller/<tag>/manifest/manifest.yamlFor instance, this Github repository https://github.com/gianlucam76/jsonnet-examples contains jsonnet files. You can use Flux to sync from it and then simply post this JsonnetSource CRD instance. The jsonnet-controller will detect when Flux has synced the repo (and anytime there is a change), will programatically invoke jsonnet go module and store the outcome in its Status.Resources field.
apiVersion: extension.projectsveltos.io/v1beta1 kind: JsonnetSource metadata: name: jsonnetsource-flux spec: namespace: flux-system name: flux-system kind: GitRepository path: ./variables/deployment.jsonnet variables: deploymentName: eng namespace: staging replicas: "3"apiVersion: extension.projectsveltos.io/v1beta1 kind: JsonnetSource metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"extension.projectsveltos.io/v1beta1","kind":"JsonnetSource","metadata":{"annotations":{},"name":"jsonnetsource-flux","namespace":"default"},"spec":{"kind":"GitRepository","name":"flux-system","namespace":"flux-system","path":"./variables/deployment.jsonnet","variables":{"deploymentName":"eng","namespace":"staging","replicas":"3"}}} creationTimestamp: "2023-05-26T06:55:13Z" generation: 3 name: jsonnetsource-flux namespace: default resourceVersion: "39826" uid: b4cc7584-528d-4938-b6ed-74ec5ba1d760 spec: kind: GitRepository name: flux-system namespace: flux-system path: ./variables/deployment.jsonnet variables: deploymentName: eng namespace: staging replicas: "3" status: resources: | {"apiVersion":"apps/v1","kind":"Deployment","metadata":{"labels":{"app":"eng"},"name":"eng","namespace":"staging"},"spec":{"replicas":3,"selector":{"matchLabels":{"app":"eng"}},"template":{"metadata":{"labels":{"app":"eng"}},"spec":{"containers":[{"image":"nginx:latest","name":"my-container","ports":[{"containerPort":80}]}]}}}}Sveltos can used at this point to deploy resources in managed clusters:
apiVersion: config.projectsveltos.io/v1beta1 kind: ClusterProfile metadata: name: deploy-resources spec: clusterSelector: env=fv templateResourceRefs: - resource: apiVersion: extension.projectsveltos.io/v1beta1 kind: JsonnetSource name: jsonnetsource-flux namespace: default identifier: JsonnetSource policyRefs: - kind: ConfigMap name: info namespace: default --- apiVersion: v1 kind: ConfigMap metadata: name: info namespace: default annotations: projectsveltos.io/template: "true" # add annotation to indicate Sveltos content is a template data: resource.yaml: | {{ (index .MgtmResources "JsonnetSource").status.resources }}kubectl exec -it -n projectsveltos sveltosctl-0 -- ./sveltosctl show addons +-------------------------------------+-----------------+-----------+------+---------+-------------------------------+------------------+ | CLUSTER | RESOURCE TYPE | NAMESPACE | NAME | VERSION | TIME | CLUSTER PROFILES | +-------------------------------------+-----------------+-----------+------+---------+-------------------------------+------------------+ | default/sveltos-management-workload | apps:Deployment | staging | eng | N/A | 2023-05-26 00:24:57 -0700 PDT | deploy-resources | +-------------------------------------+-----------------+-----------+------+---------+-------------------------------+------------------+JsonnetSource can also reference ConfigMap/Secret. For instance, we can create a ConfigMap whose BinaryData section contains jsonnet files.
tar -czf jsonnet.tar.gz -C ~mgianluc/go/src/github.com/gianlucam76/jsonnet-examples/multiple-files . kubectl create configmap jsonnet --from-file=jsonnet.tar.gz=jsonnet.tar.gz Then we can have JsonnetSource reference this ConfigMap instance
apiVersion: extension.projectsveltos.io/v1beta1 kind: JsonnetSource metadata: name: jsonnetsource-configmap spec: namespace: default name: jsonnet kind: ConfigMap path: ./main.jsonnet variables: namespace: productionand the controller will programmatically execute jsonnet go module and store the outcome in Status.Results.
apiVersion: extension.projectsveltos.io/v1beta1 kind: JsonnetSource metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"extension.projectsveltos.io/v1beta1","kind":"JsonnetSource","metadata":{"annotations":{},"name":"jsonnetsource-configmap","namespace":"default"},"spec":{"kind":"ConfigMap","name":"jsonnet","namespace":"default","path":"./main.jsonnet","variables":{"namespace":"production"}}} creationTimestamp: "2023-05-26T08:28:48Z" generation: 1 name: jsonnetsource-configmap namespace: default resourceVersion: "121599" uid: eea93390-771d-4176-92fe-2b761b803764 spec: kind: ConfigMap name: jsonnet namespace: default path: ./main.jsonnet variables: namespace: production status: resources: | --- {"apiVersion":"apps/v1","kind":"Deployment","metadata":{"name":"my-deployment","namespace":"production"},"spec":{"replicas":3,"selector":{"matchLabels":{"app":"my-app"}},"template":{"metadata":{"labels":{"app":"my-app"}},"spec":{"containers":[{"image":"my-image:latest","name":"my-container","ports":[{"containerPort":8080}]}]}}}} --- {"apiVersion":"v1","kind":"Service","metadata":{"name":"my-service","namespace":"production"},"spec":{"ports":[{"port":80,"protocol":"TCP","targetPort":8080}],"selector":{"app":"my-app"},"type":"LoadBalancer"}}At this point Sveltos Kubernetes addon controller to use the output of the jsonnet-controller and deploy those resources in all selected managed clusters. To know more refer to Sveltos documentation
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