[ Kube 16 ] Using Resource Quotas & Limits in Kubernetes Cluster

In this video I will show you how to set and use resource quotas and limits in Kubernetes cluster to better use your cluster.
Github: github.com/justmeandopensourc...
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[@RK-wk6zn]

Thanks alot Venkat for these tutorials! I have cleared CKA mainly because of these videos. These videos gave me precise idea about the concepts and how to apply them.

[@justmeandopensource]

Hi RKM, I am extremely happy to hear this. Very delighted. Infact you are motivating me to do more. Congrats on earning CKA certification. I am looking to do it as well. But busy at the moment preparing videos for various series. I am glad to hear that my channel has helped someone in their preparation for CKA. Cheers.

[@aparnakonakanchi1120]

Thank you venkat for all these videos. I am learning kubernetes from your videos. Your way teaching is good and clear to me. I am looking for videos on terraform as well.please do post those as well. Thank you

[@nikhilwankhade3953]

I had learned many things from your demos. Thanks 🙏

[@justmeandopensource]

Thanks for watching.

[@amitpawar3859]

Thanks Venkat Sir.. Nice informative video...

[@justmeandopensource]

Hi Amit, thanks for watching. Cheers.

[@romantsyupryk3009]

Thanks so much for this tutorial.

[@justmeandopensource]

Hi Roman, thanks for watching. Cheers.

[@nikhilwankhade3953]

Thanks. very useful videos 👍

[@justmeandopensource]

Thanks for watching.

[@nguyenhuuthang5372]

Great work Venkat. Hope to make more series and videos

[@justmeandopensource]

Hi Nguyen, thanks for watching. I will surely be making more videos. Cheers.

[@jlan421]

Venkat, great tutorial, might be a continuation to this, topic if you can create a related video tutorial on admission controller, pod security policy and Open Policy agent (OPA). Cheers!

[@justmeandopensource]

Hi, thanks for watching this video. I have pod security policies and opa in my list and will work on that. Cheers.

[@johnclarkson6120]

Dude, this is best k8s course,,,google need u.

[@justmeandopensource]

HI BGP ASNO, many thanks for watching this video and taking time to comment and appreciate. You made my day. :)

[@md.zakirhossain6210]

Thanks

[@justmeandopensource]

Hi Zakir, thanks for watching.

[@vibhormathpal2021]

Thanks for the wonderful video...here i have one question...is it necessary to create quota limit at NS level before resources at pod level? on other words, can i straight away apply the resource limit at POD without making any quote at NS .

[@justmeandopensource]

Hi Vibhor, thanks for watching. In order to enforce limits for all pods by default you can set it at the namespace level. So that you don't have to define it for every pod.

[@bhupathirajuramnarendra7163]

hi venkat ur amazing man , i need some clarification that in real time also we use quotas to our namespaces?

[@justmeandopensource]

Hi Bhupathi, thanks for watching. What you mean by real time? Its a common practice to use Quotas so that you can define which teams can use how much of resources if the cluster is shared between multiple teams. Cheers.

[@nikhilwankhade3953]

Can we have vertical scaling of pods with automatic scale based on usage of resources. Thanks. 🙏

[@justmeandopensource]

Yes you can. I have done a video on it. kzbin.info/www/bejne/nH27oniLfsSKiMk

[@gautamsoni17990]

Hey Venkat, I have a doubt in this video, as you modified the quota-mem.yaml and add the requests.memory: "100Mi", After then you try to create one pod where only memory limits set, there were no requests memory configured in the pod. THen your pod doesn't create but i have tried the same thing and pod has been created and running fine. ++++++++++++++++++++ [vagrant@kmaster mine_yaml]$ kubectl -n quota-demo-ns describe quota demo-quota-mem Name: demo-quota-mem Namespace: quota-demo-ns Resource Used Hard -------- ---- ---- limits.memory 100Mi 500Mi requests.memory 100Mi 100Mi [vagrant@kmaster mine_yaml]$ [vagrant@kmaster mine_yaml]$ more pod-quota-mem.yaml apiVersion: v1 kind: Pod metadata: name: nginx namespace: quota-demo-ns spec: containers: - image: nginx name: nginx resources: limits: memory: "100Mi" [vagrant@kmaster mine_yaml]$ [vagrant@kmaster mine_yaml]$ kubectl -n quota-demo-ns get all NAME READY STATUS RESTARTS AGE pod/nginx 1/1 Running 0 6m16s [vagrant@kmaster mine_yaml]$ ++++++++++++++++++++ Please let me know if anything else required.

[@justmeandopensource]

HI Gautam, thanks for watching. If you don't specify requests but only limits, then limits will be used as requests. Its a good practice to specify both requests and limits.

[@manikanthkommoju3176]

how do we login to the k8 cluster with tokens/rbac/ldap?

[@justmeandopensource]

Hi Mani, Thanks for watching the video. RBAC is different to Authentication. RBAC is role based access control for authorization. You create a role/clusterole and map it to existing accounts. Authenticating to the cluster has to be done by external service like LDAP. I haven't played with that bit yet. Once I have some knowledge on it, I will post the video. Thanks.

[@manikanthkommoju3176]

Just me and Opensource thanks for taking time to reply👍

[@k.r.mohanreddyk.r2350]

Hi u can explain kubernetes on aws eks services please

[@justmeandopensource]

Hi Mohan, Thanks for watching my video. I am yet to get my hands on AWS side and when I get some time, I will definitely make it a video for the public. Thanks

[@sudheshpn]

Can you do a video to create resource quota using admission controller

[@justmeandopensource]

Hi Sudhesh, thanks for watching. In this video I used microk8s cluster. But the process should be similar in any kubernets cluster. I don't think you need to use admission controller.

[@sudheshpn]

@@justmeandopensource Its always better to have all policies like ResourceQuota,PSP applied on the Admission controller instead of namespace level so thats it becomes easy to manage

[@ledung1030]

can you share tool at right corner to monitor? thanks a lot

[@justmeandopensource]

Hi, that's conky. You can install conky and search for conkyrc configuration file in internet and you will find loads of them. You can customize what you want to see. I don't use this anymore and haven't saved a copy of my config either.

[@ledung1030]

@@justmeandopensource thank you!

[@justmeandopensource]

@@ledung1030 you are welcome

[@kaankarakaya4278]

can you take video about login new dashboard with https

[@justmeandopensource]

Hi, Thanks for watching the video. For Kubernetes Dashboard, you can check out my other video at kzbin.info/www/bejne/mKPUcoCvlt6dqKs. The web dashboard is already https enabled. Thanks.

[@devopskey6251]

or some other communication channel like slack channel.

[@travelersnotebook3503]

Difference between Requests and Limits were not clear from the video

[@justmeandopensource]

Sorry about that if you feel it that way. I should have made it clear. Will keep it in mind for future videos. Thanks for watching.

[@travelersnotebook3503]

@@justmeandopensource Overall the content is great. i just felt that part was missing.

[@justmeandopensource]

@@travelersnotebook3503 thanks for the feedback. Cheers.

[@gautamsoni17990]

Hey Venkat, I have a doubt in this video, as you modified the quota-mem.yaml and add the requests.memory: "100Mi", After then you try to create one pod where only memory limits set, there were no requests memory configured in the pod. THen your pod doesn't create but i have tried the same thing and pod has been created and running fine. ++++++++++++++++++++ [vagrant@kmaster mine_yaml]$ kubectl -n quota-demo-ns describe quota demo-quota-mem Name: demo-quota-mem Namespace: quota-demo-ns Resource Used Hard -------- ---- ---- limits.memory 100Mi 500Mi requests.memory 100Mi 100Mi [vagrant@kmaster mine_yaml]$ [vagrant@kmaster mine_yaml]$ more pod-quota-mem.yaml apiVersion: v1 kind: Pod metadata: name: nginx namespace: quota-demo-ns spec: containers: - image: nginx name: nginx resources: limits: memory: "100Mi" [vagrant@kmaster mine_yaml]$ [vagrant@kmaster mine_yaml]$ kubectl -n quota-demo-ns get all NAME READY STATUS RESTARTS AGE pod/nginx 1/1 Running 0 6m16s [vagrant@kmaster mine_yaml]$ ++++++++++++++++++++ Please let me know if anything else required.