[kubernetes-users] Backup and restore kubeadm

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Hi all,

Is there any way to backup kubeadm master and then restore the master even 
the master OS is broken, or kubeadm has been reset? I looked into backup 
ectd but it seems not the right solution. 

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[kubernetes-users] Persistent volume with Infiniband

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Hi everyone, 


I want to build a Kubernetes cluster on bare-metal servers. Our cluster 
will be dedicated to MachineLearning/DeepLearning. 

We have 1 master and 3 nodes (workers). Each node has 8 GPUs and about 1TB 
local storage. Our cluster will be used by multiple users.

Users will login master server, create pods for their model (with requested 
GPU/CPU). 


I will use Persistent Volume to provision local storage, then the users can 
claim the Persistent Volume and use it in the pod to store their 
MachineLearning datasets and outputs. 

Because the dataset can be stored in one worker node but be processed in 
other workers, we want to use Infiniband over RDMA to boost the 
storage-to-cpu loading speed. 

We also want to use Infiniband to leverage Nvidia GPU-redirect between 
nodes. 


Our question is:

1. Persistent Volume has many options to provision the storage as in this 
link , so 
which solution is suitable for our case? (we thought about NFS but it might 
be slow)

2. Our cluster will be dedicated to multiple clients, is there any problem 
when we use InfiniBand for multiple client clusters. 


Thank you. 




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