Kubernetes Cluster Setup with Kubeadm in RHEL7 |CENTOS7 for beginner --2021

#kuberneteswithkubeadm #kubeadm #kubernetescentos #kubernetescentos 7 #kubeadminit #installkubernetesoncentos #kubernetesoncentos #installkubernetesusingkubeadm #installkubernetesoncentos7stepbystep #kubeadmcreatecluster #kubeletkubeadmkubectl #k8scentos
This video demonstrate about how to configure Kubernetes two node cluster with kubeadm. A step by step procedure to build master and worker node.
Installation Steps in Github wiki:
github.com/tun...

[@edadalareddysekhar4993]

I usually don't comment on KZbin, for this video, whoever done this 🙏🙏 really appreciable

[@tunetolinux4173]

Appreciate your feedback. Thank you.

[@johsttincurahua5505]

Bro thank you so much for your video, I had a lot of problems trying to run kubernetes in Ubuntu, now finally it works in centos! I had to change somethings, first I needed to change this repo_gpgcheck=0 in kubernetes.repo and also before put kubeadm init I needed to delete a file: rm /etc/containerd/config.toml and restart the container service: systemctl restart containerd , thank you again I am getting suscribed.

[@tunetolinux4173]

Thank you joshsttin. Yes I thought of creating a new video about this. Newer version of kubernetes doesn’t use docker. It uses containerd instead. Hence you don’t need to install docker anymore. Second before you run #kubeadm init command. Just make sure #systemctl enable containerd -now. Later once your cluster in running you may want to view running containers details, you may run command # ctr ns list and # ctr -namespace k8s.io container list

[@cougar2013]

This video really helped me. Thank you!

[@faridkhan1954]

I appreciate the help dude. This helped a lot :)

[@deepabalu1028]

Thank you

[@vishvranjanmishra7030]

Amazing. Really helpful

[@tunetolinux4173]

Appreciate your feedback.

[@vinothvj8848]

working perfectly thanks

[@tunetolinux4173]

You are welcome

[@amitpawar1677]

Nice video Zafer bhai

[@tunetolinux4173]

Thanks Amit :)

[@dharanibalaraman4089]

Thanks, Nice video. Can you share the installation docs notepad which you used, thanks

[@tunetolinux4173]

Grad you like it. Steps are in GitHub and Link is in video description area.

[@samratmitra7536]

Good video. Thank you.

[@tunetolinux4173]

Glad you liked it! There is a series of them and more coming. Check the playlist. kzbin.info/aero/PLKse5vnrrZ2mknVuTt9_SOaRg6l-vGURy

[@sureshsg4060]

[discovery] Failed to request cluster-info, will try again: configmaps "cluster-info" is forbidden: User "system:anonymous" cannot get resource "configmaps" in API group "" in the namespace "kube-public"

[@mohamadrad4547]

Thank you for creating this tutorial :)

[@tunetolinux4173]

Thank you Rad. Hope you like it.

[@RAJKUMAR-bo2cb]

hi mohamad rad help me docker engine showing error

[@mohamadrad4547]

@@RAJKUMAR-bo2cb what is your problem

[@RAJKUMAR-bo2cb]

Docker configuration file ,,and I give systemctl restart docker, systemctl status chk showing active failed

[@RAJKUMAR-bo2cb]

Pls help me this one Mohammed I 'm trying many times

[@gauravharialia7792]

Really awesome and helpful! Thanks One question, Can I create my Kubernetes Cluster Setup on (16GB RAM/i7 processor/512 GB SSD) Laptop after installing virtualBOX

[@tunetolinux4173]

My laptop has the same specifications. Go ahead.

[@gauravharialia7792]

@@tunetolinux4173 : thanks

[@pramod4509]

@@tunetolinux4173 16GB ram is fine, is i5 processor enough or do we require i7?

[@tunetolinux4173]

@@pramod4509 i5 is fine.

[@AnurupShrestha]

Thanks for your video, I am tyring to run on CentOS 7 but I am always stuck on kubeadm init, I followed your instruction as suggested in your video, but I got this error message and failed, not sure how to resolve this. [preflight] Running pre-flight checks error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR CRI]: container runtime is not running: output: time="2023-03-17T23:10:39-04:00" level=fatal msg="validate service connection: CRI v1 runtime API is not implemented for endpoint \"unix:///var/run/containerd/containerd.sock\": rpc error: code = Unimplemented desc = unknown service runtime.v1.RuntimeService" , error: exit status 1 [preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...

[@기계공학사]

Awesome thx! :)

[@tunetolinux4173]

Grad you like it. Thank you.

[@mutaghaclinton3744]

Please, where can I get the link to follow to follow this tutorial. Thanks

[@tunetolinux4173]

github.com/tunetolinux/Kubernetes-Installation/wiki

[@mutaghaclinton3744]

@@tunetolinux4173 Thanks very much sor

[@leamon9024]

Really awesome and helpful! Thanks One question, Is it okay if I use lxc/lxd instead of VM to run master nodes and worker nodes for production environment? How would you suggest?

[@tunetolinux4173]

Go for VM.

[@leamon9024]

@@tunetolinux4173 Thanks!

[@zahidzia4309]

its the kind of video I was looking for so perfect and how awesome. I have followed your video everything worked well but when I run kubectl get pod --all-namespaces my coredns containers are stuck at ContainerCreating state...what did i do wrong?

[@tunetolinux4173]

Your worker doesn’t have enough memory or cpu. Increase that to fix this issue.

[@zahidzia4309]

@@tunetolinux4173 its the master node and i have set 2 cpu and memory aloocated is 8gb

[@tunetolinux4173]

@@zahidzia4309 yes. If these pod runs on master.

[@zahidzia4309]

@@tunetolinux4173 let me rebuild cluster on new vm and will ask you if i come accross any issue ..thanks for your reply I am so greatful to you.

[@juanchicchon5017]

Hi Buddy, At 2:32", I'm wondering why is registered at k8s-master's host file: 192.168.99.113 k8s-master ?

[@tunetolinux4173]

Yes I noticed that later. Thanks for bringing up to me for notice.

[@Sam_Sepiol6785]

Hey, Thank you, it is very usefull. Can you create the same guide with openshift?

[@tunetolinux4173]

Both 3.x and 4.x need huge amount of memory. I need to upgrade my desktop in order to install OCP. My laptop got only 16G of memory.

[@ernestpugazh9716]

Hi, How to verify network connection between PODs on different worker nodes. Example : POD1 on Worker Node1 and POD2 on Worker Node2.

[@tunetolinux4173]

It communicate with CNI and in our cluster we are using weave. You can also use other CNI addons such as calico and flannel. Hope this answered.

[@ernestpugazh9716]

@@tunetolinux4173 Thanks for your response. I mean how to check the network connection between the pods on different worker node to ensure the connectivity between the different worker node pods before deploying the frondend and backend applications. I mean is thier any kubectl or docker commands. Thanks

[@sureshsg4060]

Very useful, thanks, I have implemented on my personal laptop all good but after master when I'm trying to join the worker facing this below issue. error execution phase preflight: couldn't validate the identity of the API Server: configmaps "cluster-info" is forbidden: User "system:anonymous" cannot get resource "configmaps" in API group "" in the namespace "kube-public" any ref to over come to this error

[@RAJKUMAR-bo2cb]

Hi tune on linux i install docker configuration overlay2 file show error help me

[@RAJKUMAR-bo2cb]

reply quickly tune on linux help

[@venkatsdiary]

iam getting below error Initial timeout of 40s passed

[@davy2084]

can I install using RHEL 8 ?

[@tunetolinux4173]

Worth try. I have to check.