Setup Kubernetes Cluster Using Kubeadm [Multi-node]

[@devopscube]

📙 𝗥𝗘𝗟𝗔𝗧𝗘𝗗 𝗥𝗘𝗦𝗢𝗨𝗥𝗖𝗘𝗦 1. 𝗞𝘂𝗯𝗲𝗿𝗻𝗲𝘁𝗲𝘀 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗖𝗼𝘂𝗿𝘀𝗲: techiescamp.com/kubernetes 2. 𝗞𝘂𝗯𝗲𝗿𝗻𝗲𝘁𝗲𝘀 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹𝘀: bit.ly/kubernetes-guides 3. 𝗙𝗿𝗲𝗲 𝗗𝗲𝘃𝗢𝗽𝘀 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 𝗖𝗼𝘂𝗿𝘀𝗲: bit.ly/dvops-roadmap

[@yassinouakka126]

man you hit the spot, i have been searching for almost 3 days about what you are saying in this video, you are a true mentor❤

[@oxcart4004]

I was getting depressed looking at the official kubernetes documentation. There are so many options, which is a good thing, but sometimes you just need the "cookbook approach" to get things up and running just so you can have a look around. Great video and good online resources. Just even going through the online scripts is very helpful and educational. I got a cluster running and the only thing I had to change at all in the scripts were ethernet port names... my ports were eno, not eth.

[@devopscube]

Glad it was helpful :)

[@cloudspikes_inc]

This is a 10/10 rating content. Everything so perfect, accurately automated and reliable solution. Thank you so much @devopscube for sharing such a wonderful piece of art. God bless you!!!!

[@devopscube]

Glad it helped!

[@gilgameshnightcore2885]

This is by far my most favorite Kubernetes Cluster Setup, so much details and so easy to understand. However, does your script includes the networking and storage setup for Kubernetes Cluster yet? And if it doesn't, do you have any plans that guides us on how to setup those things?

[@gabrielvalentin3106]

Excellent! Thanks for your efforts!

[@devopscube]

My pleasure!

[@vatsav1984]

Great - i tried Bibin's script few years ago - worked like a charm . Though i had already set up my own local k8s cluster in a more tedious and laborious manner . But great to have a push button solution for setting up a k8s cluster locally.

[@ajk7151]

crisp and to the point. excellent tutorial! thank you.

[@panchaldineshb]

WOW --- very clean and so helpful...

[@inteliconn995]

Thanks! It works!!! When your CKA course will be ready?

[@devopscube]

Hi, Our course is now live! techiescamp.com/p/certified-kubernetes-administrator-course We haven't announced it to the community yet as we are still doing a final review of all the topics. However, it is available for purchase. Use coupon code TECHIES30 to get a 30% discount! You will get free access to around 60 practice questions with explanations. Note: This is a text-based course with plenty of illustrations and hands-on exercises. The text format makes it easier to navigate and follow, especially since it involves many commands.

[@santoshperumal129]

Great content you are doing really cool stuff

[@devopscube]

Glad you like it !

[@rohithsai5265]

Content and slides 🔥🔥🔥

[@zenobikraweznick]

This is awesome, thank you 👍

[@devopscube]

You're very welcome!

[@amac1211]

Awesome content, clear and concise. Was curious if I wanted to utilize containerd instead of cri-o, what would you change in the script for that?

[@RomaRapoport]

I have depoyed VM's through VM aria, and at the last step when trying to work with the cluster from workstation i get: certificate signed by unknown, what to do?

[@killerman3635]

Struggled a lot. Thanks sir this is working fine😊

[@devopscube]

Glad it helped :)

[@ThuanTran-fn2yx]

Great, thank you so much for the script, I installed on 2 computer locally, everything works fine except DNS, the pod, service looks correct, but inside the pods, connection to CoreDNS service got connection refused, I am not sure what could be the reason. I tried to use the debug guide on k8s document but not help much.

[@rajarajan8869]

Hi I have a few questions 1. Why do you use ip tables and enable bridge network in this case iptables apply on the ec2 instance and other public cloud. 2.I have launched master and worker nodes and deployment the nginx web server on the master node how to monitor the pod from the master node or worker node it's possible to access the dashboard to manage the pods 3. How to enable node port in the public cloud and how to access the nginx web server in the public

[@astube08]

love it ... Thank you

[@akaspires037]

one doubt sir, here we configured 2 slaves manually so if we enable autoscaling and load balancer if load demands more than 3 servers .. are we going to do manually or through autoscaling it is going to create another server

[@ManjunathKundargi]

Hi sir, actually we have 3 workstations at office n planning to create the kubernetes cluster in these things. can i follow these steps for the setup, will this be usefulll for uat and prod deployment?

[@am7-p]

When most of community use container.d, what is the good reason using CRI-O? I wonder it is like do something different this time - or there is a benefit for using CRI-O?

[@devopscube]

Most people use kubeadm setup for learning and certification preparation. I used cri-o because in CKS certifications, there are tasks where you need to use crictl utiltity to debug issues.

[@Dhianesh]

I am frequently getting error "The connection to the server 10.0.0.6:6443 was refused - did you specify the right host or port?" on control-plane 'Can you please help me'

[@thanushashetty-b8w]

Same here!

[@strickmans]

Getting this error: Found multiple cri endpoint on the host. please define which one you wish to use by setting the crisocket When running the master script

[@devopscube]

I guess there is more than one container runtime.:which VM image are you using?

[@adityaguptaa]

@devopscube I am running the metric server with the /metrics-server.yaml file but seeing "Metrics API not available" metrics-server-d4dc9c4f-b5s96 1/1 Running 0 108m jump:~$ kubectl top nodes error: Metrics API not available

[@dattatrayhinge3410]

I am frequently getting error "The connection to the server 10.0.0.6:6443 was refused - did you specify the right host or port?" on control-plane

[@raghu3781]

same issue with me, did you get it resolved?

[@vacuumsealer8527]

./common.sh: line 50: curl: command not found Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). gpg: no valid OpenPGP data found. Helps me pls?

[@devopscube]

Looks like curl is not available in the server ..install curl first and then run common.sh

[@imtiazali1628]

Thanks for such detailed video. Can you please create a video for ingress for point to any existing resource. I tried many tuturials but still struggling.

[@devopscube]

Will do .. What issue are you facing?

[@shayelasharma1039]

what if we use loadbalancer instead, I am not getting the external ip... I am launching cluster on aws ec2 instances, any reason for it? plz revert

[@devopscube]

You can ..you need to point to the master node private IP.. May I know the reason why you are not getting an external IP? Are you working in a private subnet inside an org network?

[@karnanspark9012]

Hi brother, using local two linux machine can i do the same ? Is it possible then share the document for the onpremise deployment 😅

[@devopscube]

It is the same Karnan

[@babanmalhi6168]

Thank you so much.

[@sivasatya4265]

That was a nice & useful lecture , Thankyou & one question sir how do you setup the aws ssh in vscode is there any guide for that if it is there it is very helpful.Thankyou once agian

[@devopscube]

use the integrated terminal

[@visalpattyal8133]

I have observed that the pods in my cluster is not able to install the packages when exec to the pod . How to resolve this? My /etc/resolve.conf content is search sample.svc.cluster.local svc.cluster.local cluster.local us-west-2.compute.internal nameserver 10.96.0.10 options ndots:5

[@visalpattyal8133]

If anyone know the issue please help me.

[@ashwinkm3156]

Awesome But it is mostly an airgap network in actual production environment. So, no internet. Any waybto make it work in an airgap environment?

[@devopscube]

You will have to download all the images to the control plane first..that is the only internet requirement..rest of the packages should be available with the respective satellite servers.

[@ashwinkm3156]

@@devopscube But all the control plane and workers will be in an airgap environment!

[@devopscube]

@@ashwinkm3156 what I meant is, download images for control plane node. You can get in touch with the network/security team for downloading those images through proxy. or ask them to upload to the central private repository. Also try kurl.sh/..its specifically designed for aigapped environments

[@ashwinkm3156]

@@devopscube 👌 thank you so much

[@39vignesh.m35]

Sir for installing kubernates version 1.26.1 we should use calico v3. 25.0 ? Cni version is important.. For mach k8s version

[@devopscube]

Not exactly. But try to have the latest one to avoid issues

[@39vignesh.m35]

@@devopscube sir last doubt I deploed postgres ha in k8s refering devopscube page can I use for production and k8s version 1.22.0 support postgres ha latest version

[@39vignesh.m35]

@@devopscube sir I use physical virtual machine not cloud server

[@NikolaŽivković-y8h]

@devopscube your tutorial is not working. I use AWS created 3 instances, deployed the common file and master as per tutorial, deployed the sample file also and only one pod is accessible on port 32000 also when I include a ingress controller the ingress controller failes to get installed regardless what I do. Here are some networking issues in plase with calico

[@devopscube]

Will take a look ..

[@creazyengineer8080]

not working E: Malformed entry 51 in list file /etc/apt/sources.list (Component) E: Malformed entry 1 in list file /etc/apt/sources.list.d/kubernetes.list (Component) E: The list of sources could not be read.

[@alfagroupkz]

Magnificent! Get subscribed

[@omerfethicaner8907]

hello, you are the best thank you so much, Can record kubernetes cluster update?

[@devopscube]

Will publish it soon. You can check my blog for detailed upgrade steps devopscube.com/upgrade-kubernetes-cluster-kubeadm/

[@rohanrustagi7857]

sir do we use these type of cluster in production or other environment??

[@mallikarjunkonemane6908]

They use deployment stategy like blue green and canary deployment!!..

[@devopscube]

Hi Rohan, kubeadm setup follows all the best practices for the cluster. I personally haven't heard about anyone using it for production. People use solutions like Kubespray for the setup in on-premises. But from a learning perspective or test clusters with a small number of worker nodes, kubeadm is a great solution. When it comes to cloud, most organizations used manged solutions like AWS EKS, Google cloud GLE etc.

[@hangoutbuddy]

Hi Bibin Thanks for the Nice video. I want to setup this on My AWS cloud..Now will I face any problem as manually you cannot change IP?

[@devopscube]

@hangout buddy, no. In fact the demo was done on AWS instances ..give it a try ..if you face any issues or have any doubts, drop a comment here or in the blog. I will take a look at it You can also use the terraform script in the repo to provision instances on Aws ..

[@hangoutbuddy]

​@@devopscube It worked like a charm 😁. Tagged you 🙂 on LinkedIn post as a gratitude ❤

[@luongquyen1037]

thank you so much !