any open source tool for continuous K8s resource status retrieval
Is there any open-source tool or logic by which I can get the continuous status of K8s resources. For example if have 10 deployments running on my K8s cluster then I want to keep checking the current operational status of those deployments. Similarly, this will hold good for other resources like Replica sets, stateful sets, Daemon sets, etc. Currently, I have a logic that is dependent on the specific deployment hence looking out on something which can be generic for all deployments.
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Couple of really simple ways to do this are using command like:
kubectl get deployments -w
or
watch kubectl get deployments
As @rock'n rolla correctly pointed out, kubectl get -w is a really easy way to get basic information about the state of different Kubernetes resources.
If you need a more powerful tool that can quickly visualize cluster health, you can use the Kubernetes Dashboard or one of the many alternatives.
Personally I like to use the k8dash - Kubernetes Dashboard because it's really easy to install and we can fully manage the cluster via the k8dash web interface.
I will describe how you can install and use k8dash.
As described in the k8dash - Getting Started documentation, you can deploy k8dash with the following command:
$ kubectl apply -f https://raw.githubusercontent.com/indeedeng/k8dash/master/kubernetes-k8dash.yamlTo access k8dash, you must make it publicly visible using Ingress (see: Running k8dash with Ingress) or NodePort (see: Running k8dash with NodePort).
After exposing the dashboard, the easiest way to log into it is to create a dedicated service account (see: Service Account Token).
Using k8dash UI dashboard is pretty intuitive, you can monitor Nodes, Pods, ReplicaSets, Deployments, StatefulSets and more. Real time charts help quickly track down poorly performing resources.
