How does Kubernetes create a Pod?

This is the greatest video of all time for beginners in Kubernetes.

Great explanation...thanks. this video. Would it be a bad idea if this video can be used in the IBM Cognitive Class Course called Introduction to Containers, Kubernetes, and OpenShift V2? (it's easier to conceptualize)

i was looking for a simple explanation and it was soo difficult to find out. Thank you soo much for this video and the quality of your explanations!!

Great explanation

Can anyone tell me in detail how the scheduler will know when to assign the pod to a node

excellent presentation !

I think one more thing needs to addressed here ,that is CNI for communication between pods , we have several of them like weave ,calico, flannel etc

A great explanation, good didatic. Thanks for your contribution 👏

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Thank a lot!

I have been learning about Kubernetes for past one week and came across your video and it gave me an deep understanding about various stages of pod creation. Thanks much.

very nice

Can we just take a moment to appreciate how well Whitney can effortlessly write in mirror image 🙂

Perfect, all i needed !

Is the actual state also stored in etcd ? How are the components aware of the actual state ?

Labs wont work for me. Error: Service is currently restricted and is available only to certain users

Controller managers takes care of runtime failures of pods

Steps in creating a new pod:

1. A user submits a new configuration with kubectl to kube-API Server
2. Kube-API Server writes the configuration to etcd
3. Scheduler compares the configuration to actual state
4. Scheduler informs kube-API Server of which compute node(s) to schedule the workload
5. Kube-API Server requests corresponding Kubelets to create the new pod
6. Kubelet creates a new pod
7. Kubelets report latest status to kube-API Server
8. Kube-API Server updates the actual state in etcd

kube-proxy is for communication between compute nodes

kubelet does a few things:

1. register compute nodes
2. report status
3. start/stop workload

honestly the best explanation over web!!

Great overview. Is it same flow while creating a deployment or any differences?

Best and simple way how pod is created
Thanks a lot

I was prepared for the question explain K8s architecture. But this question came in interview🙂

Awesome

Can replication controller recreate the pod by itself or does it talk to kubelet to restart the pod?

I love the logical processes you showcase.......damn cool!

…I’m not supposed to be In this class.
What are nodes? API server? Clusters?

Nicely explained

very good explanation....

doesn't ETCD store dns / ip for pod communication? and one more question is that which component generate full DNS name for pod?

what happens after the controller manager identifies that there is pod which has to be reschedule? i mean what exactly happens after that.

Wonderful description

it`s cool !!! thanks!

Doesn’t Kubernetes need a load balancer in front of compute nodes?

How do you write backwards like that? Good video too!

When the pod dies who lets API server know the pod is dead? Is it kubelet?
The video moves to controller manager and says that controller manager goes to Kube API server and gets to know the pod is down.
But the state of the pod on the Compute node need to be conveyed back to the API server, isn't it?

Nicely explained 👌

🥰❤️

So I am a data scientist and hence mostly an end user of the pods.. thanks for the explanation. So when we create a pod it assigns a random generated (available) ip that I should use for the compute. In my case I was using a jupyter notebook. Since pods are ephemeral like you mentioned, we need to attach a disk to the vm/pod which is always available to me. One time while running some python commands, my pod crashed and I got assigned another vm ip but the person who got assigned the vm ip I was using until then got my jupyter notebook saved on his disk. What could have happened? I am intrigued.

The Best video which explained the Pod creation

Surely one of the coolest way to explain k8s pod creation 👍👍

How do they make these videos? Do they have to learn how to write backwards? I don't think so... Do they?

How we restore back any pod that went to crashloopback off? This process is auto or manual?

Great introduction to the architecture of k8s. Well explained and clear.

To this day I could not understand how do they write backwards?

Great description. I really like that you chose a specific, isolated use case (pod creation), and then you describe exactly what's involved.

great content. awesome video..

Then what is the role for istio service mesh..... And also provide full video on kubernetes security of nodes