Does kubernetes provide an API in its client library to get the cluster-info dump. I went through its API documentation and could find any api which could actually do this.
What i do now: kubectl cluster-info dump --output-directory="dumpdir"
What i want: Using client-go/kubernetes api libraries, make an API call to get this dump from a golang application. Is it possible?
What i know: There are individual API's for each resource which can provide all the information provided by the cluster-info dump, but i want to do it will a single API call.
For example: golang code:
coreClient := kubernetesapi.CoreV1()
nodeList, err := coreClient.Nodes().List(metav1.ListOptions{})This will give me a list of nodes.
Is there an API which returns what "kubectl cluster-info dump" would give. So i can get all the details Programmatically.
I am afraid this is no such API to do that. kubectl cluster-info dump is also implemented based on k8s sdk.
But you can refer the implementation and customize to your own needs.
Backup and restore cluster resources:
https://medium.com/@marekbartik/kubernetes-in-production-snapshotting-cluster-state-41bd767ef14
Use ark for cluster backup and resotre:
ark schedule create <SCHEDULE NAME> --schedule "0 7 * * *"
ark restore create --from-backup <BACKUP-NAME>You can capture API calls by listing the output with verbose option in kubectl cluster-info command:
kubectl cluster-info dump -v 9
For example:
curl -k -v -XGET -H "Accept: application/json, /" -H "User-Agent: kubectl/v1.12.1 (linux/amd64) kubernetes/4ed3216" 'https://10.142.0.3:6443/api/v1/namespaces/kube-system/events'
Get the token for authorization purpose in your cluster:
MY_TOKEN="$(kubectl get secret <default-secret> -o jsonpath='{$.data.token}' | base64 -d)"
Now you can make API call for the target resource:
curl -k -v -H "Authorization : Bearer $MY_TOKEN" https://10.142.0.3:6443/api/v1/namespaces/kube-system/eventsKeep in mind that you may require role binding in order to grant view permission for your service account:
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: default-view
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: view
subjects:
- kind: ServiceAccount
name: default
namespace: default