2021-03-31-kube-state-metrics-goes-v-2-0.md: Add kube-state-metrics 2.0

[lilic]

Add kube-state-metrics 2.0 blog post announcement. As kube-state-metrics v2.0.0 is going to be released next week, (unless any bugs are reported - we have v2.0.0-rc.1 out), we wanted to have a blog post that accompanies this, as we had a bunch of user breaking changes.

/hold
I put it on hold until kube-state-metrics v2.0.0 is out, but wanted to open the PR so folks can review, the other maintainers already had a look, but are cc-ed below.

@mrueg @brancz @tariq1890

[netlify]

Deploy preview for kubernetes-io-master-staging ready!

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[lilic]

https://deploy-preview-27324--kubernetes-io-master-staging.netlify.app/blog/2021/04/06/kube-state-metrics-v2-0/

[sftim]

Thanks @lilic - I've reviewed this as best I can and I hope the feedback helps.

[lilic]

Thanks @mrueg and @sftim for the reviews, I applied the suggestions, please have another look, thanks!

[tariq1890]

Suggested change

	After deploying kube-state-metrics it provides you with an array of useful metrics about the state of your cluster out of the box! These metrics can be used to serve as an insight into your cluster: Either through metrics alone, in the form of dashboards, or through an alerting pipeline. They can especially be useful to troubleshoot an outage. A metric worth pointing out is `kube_pod_container_status_restarts_total` which can be used to alert you on a crashing pod. Another helpful metric is `kube_deployment_status_replicas` which together with `kube_deployment_status_replicas_available` can be used to alert on whether a deployment is rolled out successfully or stuck. And there are many more metrics available! If you are interested in further metrics and their details, check out the [documentation](https://github.com/kubernetes/kube-state-metrics/tree/master/docs#readme).
	`kube-state-metrics` provides you with a wide range of useful metrics about the state of your Kubernetes cluster out of the box! These metrics can be used to serve as an insight into your cluster: Either through metrics alone, in the form of dashboards, or through an alerting pipeline. They can especially be useful to troubleshoot an outage. To provide a few examples:
	i) `kube_pod_container_status_restarts_total` can be used to alert on a crashing pod.
	ii)`kube_deployment_status_replicas` which together with `kube_deployment_status_replicas_available` can be used to alert on whether a deployment is rolled out successfully or stuck.
	And there are many more metrics available at your disposal! To learn more about the other metrics and their details, please check out the [documentation](https://github.com/kubernetes/kube-state-metrics/tree/master/docs#readme).

[lilic]

I really like that the start of the sentence isn't kube-state-metrics, if you can suggest another way, I would prefer to go that way, if that's okay?

[mrueg]

Maybe A wide range of useful metrics about the state of your Kubernetes cluster is provided by `kube-state-metrics` out of the box!

[mrbobbytables]

I do like the breakout format of the examples - for the intro piece I and was thinking something along the same lines as @mrueg .
"There are numerous useful metrics and insights provided by kube-state-metrics right out of the box!"

EDIT: not a blocker

[lilic]

Done, thanks all! I added also another example as two is not a nice number :D

[lilic]

Please have another look, I addressed the changes and removed the full list of the CHANGELOG and instead linked to it.

[lilic]

I also opened kubernetes/kube-state-metrics#1449 🎉

[sftim]

Article preview

[sftim]

LGTM
Needs a confirmed release date.

[mrbobbytables]

Things look good :) @lilic can you update the address of the filename to be tomorrow's date?

[lilic]

@mrbobbytables done, thanks!

[mrbobbytables]

/lgtm
(from @sftim's lgtm)
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 81fea6c8f44d71e1d5a75eda49e91848c217c1de

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[lilic]

/hold cancel

🎉 Thank you all!