Deployment vs StatefulSet Kubernetes | Difference between Deployment and StatefulSet in Kubernetes

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In this video we actually looked into the difference between Deployment or StatefulSet Kubernetes resources. In the previous videos we have just talked about these resources but in this videos we actually discussed and saw how Deployment is not actually capable of running Stateful Distributed application and to run them we will have to use StatefulSets.
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GitHub :
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Опубликовано:

27 сен 2024

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Комментарии : 30

@jayantatul7530 2 года назад

Brilliant .. I always find your videos really helpful and easy to understand. Thanks for all your hard work . God bless you !!

@viveksinghggits 2 года назад

Hi Jayant, Thank you for the kind words. I appreciate it.

@farukabdullah2607 3 года назад

very nice explanation .... who dislike this video .. ??

@viveksinghggits 3 года назад

Thank you 😊

@adityapathak8556 3 года назад

Hey Vivek , amazing explanation, i do have one doubt , how data sync is happening between PVs here in statefulset?

@viveksinghggits 3 года назад

Hi Aditya, If I understood your question correctly, you are asking if we are running n replicas of a stateful application they would have n number of PVs, and in that case how the data is going to be synced between those PVs. This is the responsibility of the stateful application that is being run as statefulset. For example if you are running Cassandra as statefulset it's responsibility of Cassandra to manage the data between those volumes. I hope this makes sense, don't hesitate to ask any other questions if it was not clear.

@sudhanshujain9372 4 года назад

Hi vivek, It was very informative session. I have one doubt. When pod deployed and managed by deployment having separate PVC and pv is deleted , you said that will need to be looked manually. I wanted to ask if it can't be managed by liveliness and readiness probes ?

@viveksinghggits 4 года назад

Hey Sudhanshu, What I actually meant is, if the the pod is being run independently or in other words are not being controlled through Deployment in that case if the Pod is deleted we will have to manually start the pod. Because the pod is not being run using Deployment it would not start automatically. So in that case the problem is if the pod is deleted somehow. If we talk about PV and PVC if the PV is being used by a pod using PVC, we would not be able to delete the PV. Let me know if this makes sense, otherwise we can discuss more.

@sudhanshujain9372 4 года назад

@@viveksinghggits Thanks vivek for reply. I got your point now.

@viveksinghggits 4 года назад

No problem 😀

@ubbais6233 Год назад

Great explanation. 💫

@viveksinghggits Год назад

Thank you.

@sandeepkumarsahu3517 2 года назад

Hello Vivek, are you provide persional training on kubernates ?

@viveksinghggits 2 года назад

Hi Sandeep, No. Even if I was providing the training this is the exact same material that I would have covered. And if you have some questions you can obviously either ask here or schedule a call with me, the link is on the website.

@sumitbhanse007 Год назад

If I use hostname and domain parameter in deployments then I can achieve static identity (hostname and fqdn) for my pods.

@viveksinghggits Год назад

Makes sense. Thank you, Sumit.

@Raviverma-gq8xm 3 года назад

very well explained, make some more videos

@viveksinghggits 3 года назад

Thanks Ravi, Sure, I will keep making them.

@lokingan 3 года назад

Is there a version in english?

@viveksinghggits 3 года назад

The video is in English Lokson, if that is your concern. Did I misunderstand you?

@liveandlearn515 Год назад

Hater..

@Amarjeet-fb3lk 3 года назад

We can use persistance volume to store database data, then why stateful sets? If pod dies, we have volumes, that can be mounted in pods container again

@viveksinghggits 3 года назад

Hey Amarjeet, Did you watch the entire video and it didn't make sense?

@soumilkhandelwal4388 2 года назад

Hi Vivek, Great explanation, I have a doubt, let's say initially there were 3 pods in the Statefulset i.e. 3 PVC and PV, then we scaled it down to 2 pods, now the one PV and PVC is still there and the data is also there in that PV, what happens to that PV, I want to access its data how to get it? I don't know If my following doubts are correctly phrased, but I ll try : 1. Do all the PVs synchronized? i.e. what about the replication? 2. If each of the PV is replicated, then where are those replicas stored? 3. The user wants to get the data that might be present in any of the PVs , how is the mater pod gonna get that data? I hope you got what I want to ask, It would be helpful if you could clear these doubts.

@viveksinghggits 2 года назад

Hi Soumil, That's a great question, unfortunately I don't have an answer to it. If data is replicated in that case, we will be able to get the data from the other pods as well. If data is sharded we might have a problem and I think it would depend on how application/database is written to handle this. I might be way off from actual answer so please read more about it.

@soumilkhandelwal4388 2 года назад

@@viveksinghggits cool, got it, thanks for reply