Azure Load Balancer Tutorial

Azure Load balancing allows for distribution of load or incoming network traffic across a group of backend resources or servers. It operates at layer 4 of the Open Systems Interconnection (OSI) model. It is the single point of contact for clients.
In this episode I give you introduction to what Azure Load Balancer service is and what are the key concepts around it including integrations with virtual machine scale sets and availability sets.
In this episodes live demo of
- Creating load balancer service
- Adding backend pools
- Creating health probes
- Creating load balancing rules
Source code: github.com/MarczakIO/azure4ev...
Next steps for you after watching the video
1. Load balancer documentation
- docs.microsoft.com/en-us/azur...
2. basic versus Standard Load Balancer
- docs.microsoft.com/en-us/azur...
3. Quickstart
- docs.microsoft.com/en-us/azur...
Want to connect?
- Blog marczak.io/
- Twitter / marczakio
- Facebook / marczakio
- LinkedIn / adam-marczak
- Site azure4everyone.com

[@darko2004]

Perfect tutorial. Explains load balances in plain and simple language

[@superanik1]

Hey Adam, The content you create is of super high quality with each and everything explained in detailed manner. Your videos are one stop solution for me for any Azure related stuff. Please keep spreading the knowledge.

[@AdamMarczakYT]

Thanks, will do! I appreciate the kind words.

[@SBTRIS]

Surprised you havent got more viewers, well narrated, to the point, and informative. I like it.

[@AdamMarczakYT]

Thanks glad you like it. I think the answer to this question would be that my channel is quite new, just under 31 weeks old. Also I don't have big networking range to share it to many people which also means no reshares and lastly I'm not yet a great entertainer. In real situation I talk with great passion about stuff but on camera I somehow don't do it yet, but I'm working on that! :) But I'm still very happy with the result. Thanks for tuning in :)

[@sanketmitra6570]

Thanks, Adam for the lb tutorial. it's very clear and specific. I came to this tutorial when I had confusion while doing a lab. Adding a reminder to watch this space each Tuesday :).

[@AdamMarczakYT]

Great to hear! You can always subscribe and hit that notification bell if you want to receive up to date emails with video links :)

[@RandomUserAmongRandomUsers]

You make it so easy to understand, thanks for your work Adam !

[@NaveenKumar-cy6ec]

Wow after searching and finding lot of content finally found your videos. These are really simple clean explanation.

[@AdamMarczakYT]

Glad you like them!

[@robertroy1878]

Consistently the best Azure tutorials. Great stuff.

[@Southpaw07]

Several hours of reading MS boring documentation, consolidated to 13 mins in this video. Great stuff Adam Thank you

[@vithalwadjec97]

True

[@brianedwards30]

I think I went through about 20 videos before I found this one. Great content!

[@JohnDeeks]

Great explanation, thanks for taking the time to put this together.

[@javedbajwha201]

Hi Adam, Man your content really helps me to deep under stand the topic. You are star. Keep it UP

[@edwinhendriks3604]

Hi Adam, studying for AZ-104 and this is helping me a lot! Thank you!

[@AdamMarczakYT]

Fantastic, best of luck, you can do it :)

[@fredericcartier4950]

Hello Adam, This content teach me so many things. It is well explained and sharpened my curiosity to go further. Thank you

[@AdamMarczakYT]

My pleasure!

[@tryashvanth]

I would say i have seen one of the best video of explaining in KZbin.Kudos to you i am a beginner with Azure and i will follow more of your videos. and i could able to grasp the the terminologies and explanation of each and every term and the functionality of the load balancer and kudos to you i have subscribed your channel and thanks for the great video

[@AdamMarczakYT]

Wow, thanks!

[@Zorrik-qk3bn]

Ale numer, Polak rządzi w Azure. BRAWO!!!!! Więcej takich jak Adam!!!

[@AimOnTargets]

I love your videos! Perfect explanation and i love the demos!!! helps so much, keep up with the amazing work! :)

[@1001fables]

Your tutorials are awesome. Thank you for providing cli scripts for practicing.

[@AdamMarczakYT]

Glad you like them!

[@Rprakaash]

hi Adam, Really Great Video. very simple and cleanly laid out. the Azure theme is been maintained throughout. Kudos to you man.. I just finished my overall training and did some exercise. But this video can be referred to anytime if we forget it. Subscribed.

[@AdamMarczakYT]

Many thanks! Glad to have you on board!

[@khushbugupta5849]

Hey Adam it's really helpful the difference between vmss and lb was asked in my interview n I able go answer it with a gud example all thanks to u . I was able to crack 2 Interviews back to back

[@AdamMarczakYT]

Awesome, glad it helped out! Good luck on the interviews.

[@sonynavi]

Good Explanation Adam! Short and to the point!

[@AdamMarczakYT]

Glad it was helpful!

[@PalaniSamy-hz6wn]

Thank God !!! I wasted almost 2 days to find the option under back end pool ->Associated to "Availability Set" and this option is was there in old demo videos :) and finally I verified that your demo was also showing "Virtual machine" and Virtual Machine Scale set" :) Microsoft keep on changing the options :) R&D :)

[@AdamMarczakYT]

haha! well yea, that's the nature of the cloud. Everything will be changing constantly, I just got used to this at this point. Thanks for tuning in!

[@wagnerfraga3850]

Hey Adam, thanks for the video. I am surprised you haven't got more viewers also.

[@AdamMarczakYT]

You and me both! Joking, I'm happy with my current viewers, you guys are fantastic :) ! Thanks for watching.

[@somasundarsambathini1780]

Thanks Adam. You are wonderful and your videos are simply great.

[@AdamMarczakYT]

I appreciate that! Thanks for tuning in!

[@ankushjain358]

Adam.... Whatever I need to learn on Azure...I pick your video on that topic if available.....Thanks buddy for creating such awesome videos.

[@AdamMarczakYT]

Happy to hear that!

[@RameshP-ds4xt]

Excellent video with end to end details. Thanks a lot !!!

[@AdamMarczakYT]

Glad it helped!

[@Mark-hc8vu]

Amazing!!! You are an incredible teacher. Loved your explanation

[@AdamMarczakYT]

Thank you! 😃

[@jasonliu2574]

You are the best! thank you so much for all the great classes and videos!

[@azhockeynut8297]

Wish Adam was working on my team. He has such a fantastic way for helping others understand complicated topics

[@AdamMarczakYT]

Hehe, thank you :)

[@abdulthakur5608]

Hi Adam, Thank you for explaining things so clearly.

[@AdamMarczakYT]

My pleasure :)

[@TheUmeru]

You explained it so well! Thanks Adam!

[@AdamMarczakYT]

My pleasure!

[@billyli5174]

Hi Adam, Thank you for explaining it so clearly.

[@AdamMarczakYT]

Glad it was helpful! Thanks!

[@ibmuser13]

great content, Adam! Liked and subscribed to your channel. Looking forward to more Azure videos!!

[@TPOneMedia]

Your content is A+++ Thank you for this!

[@sarayghb8079]

Very well explained! Thank you Adam!

[@AdamMarczakYT]

My pleasure!

[@volfram1]

You can use CTRL + F5 in this example. It's quite useful when you need to reload tab and cache at the same time to see request going to the different instances.

[@Hackenbaker]

Great explanation, very clear. Thanks a lot for this great content.

[@AdamMarczakYT]

Glad it was helpful!

[@LokeshKumarJ-qn4bq]

Hey Adam, Your videos are so crisp :-) Love all your videos. Please make a video for the Application gateway and VMscale set

[@AdamMarczakYT]

Thanks! Noted :)

[@mohammedmarhoon7408]

Great Job Adam, thank you so much for your video.

[@AdamMarczakYT]

Glad you enjoyed it!

[@aravind_balaji2058]

Hey Adam, Thank you very much It is really helpful for my career. Content is really easy to understand Appreciate your effort man!!!!!!!!!!!!! Do continue, cheers............

[@AdamMarczakYT]

Thanks mate! :)

[@jagananumula]

simple and clean explanations, thank you.

[@AdamMarczakYT]

Cheers!

[@Mopina1026]

I'm learning a lot with yours videos. thanks

[@AdamMarczakYT]

My pleasure!

[@ankitkishore77]

Thanks my pal Adam... great one...

[@nikz0001]

best azure videos ever ...Adam you rock bro!

[@AdamMarczakYT]

Thank you :)

[@sunilsjk]

Nice video, very detailed demonstration... thank for sharing the information

[@AdamMarczakYT]

Glad it was helpful!

[@siyabongamngomezulu9743]

Great video Mr Marczak

[@AdamMarczakYT]

Thanks :)

[@diezam]

Excellent video, very well explained, thank you!

[@AdamMarczakYT]

Cheers! :)

[@johnsieminski3801]

Great job. First person I have subscribed too.

[@AdamMarczakYT]

Awesome! Thank you!

[@chieh-chuanchang4506]

This is good tutorial and very distinctly.

[@AdamMarczakYT]

CHeers! :D

[@vidyanandjain]

Too good, superb explanation :-)

[@AdamMarczakYT]

Thanks a lot 😊

[@tacos-are-tasty4857]

Loved this video

[@deep001007]

Hello Adam, This video is really superb ,great thanks

[@AdamMarczakYT]

You are welcome! Thanks!

[@bayanomari1856]

Great vids man keep it up

[@chrupek272]

Dzięki. Bardzo mi pomogłeś

[@James-sc1lz]

Really, really good video. Subscribed

[@AdamMarczakYT]

Awesome, thank you!

[@srikanthn27]

Great training.

[@AdamMarczakYT]

Glad you think so!

[@jakubzareba3211]

Amazing video great! Thanks

[@lovelife1434]

Thank you. You are brilliant 👍

[@AdamMarczakYT]

Thank you too!

[@Sagey112]

Thank You! this really helped

[@AdamMarczakYT]

You're welcome!

[@trezay5950]

Tyty helped so much!

[@Certified_Chad_42]

Thank You, great video...

[@AdamMarczakYT]

Glad you liked it!

[@SamyUsa]

This is awesome.

[@sp121861saopaulo]

Great tutorial. Thanks

[@AdamMarczakYT]

Glad it was helpful!

[@anaselwakkad]

You are the best 👌 I follow you , you explain its very sample , thx bro

[@AdamMarczakYT]

Happy to help

[@jamesrobertson7334]

Fantastic video, thank you :-)

[@AdamMarczakYT]

Glad you enjoyed it!

[@johnp7158]

best tutorials, subscribed!

[@AdamMarczakYT]

Awesome, thank you!

[@Lost_poetry_029]

hey man loved your content

[@AdamMarczakYT]

Thanks!

[@edwardv4546]

Thank you!

[@syedubedullah8173]

Thnak you Adam.. Love from india

[@AdamMarczakYT]

Thank you, likewise!

[@markusx8916]

Good tutorial

[@prasadpardeshi2231]

Nice one 👍

[@AdamMarczakYT]

Thanks ✌️

[@erezshin]

great stuff

[@AdamMarczakYT]

Thanks!

[@diegoedwardsesquivelreyes7860]

Gracias Crack! Eres un papucho

[@AdamMarczakYT]

¡gracias! 😁

[@kobethedog23]

Thanks!

[@AdamMarczakYT]

Thanks, it's my pleasure :)

[@nimageofmine]

Hi Adam, the demo you had seems to be for L4 Load Balancer. Would it support a web application running in the backend pool listening on HTTP protocol (REST API)? Also, when would you use L7 Load Balancer?

[@mystudy1512]

Hey Adam, The content is super and explained in detail By any chance, will you be doing AZ-500, SC-200, and SC-100 Training. If not, could you please suggest a few learning tutorials which you have reviewed.

[@TPOneMedia]

Thanks

[@ZaneT531]

Awesome Tutorial Mate. THANK YOU SO MUCH ! Could you consider teaching us Powershell for beginners and intermediate level in upcoming videos Pls

[@AdamMarczakYT]

Thanks! Maybe in the future, for now I focus on Azure ;)

[@lenhat7067]

Thank you

[@AdamMarczakYT]

You're welcome 😊

[@channelkerr]

Thanks for this! BTW what do you use to create your topology diagrams?

[@AdamMarczakYT]

Thanks! I used Visio for this video :)

[@BijouBakson]

Just an observation for a comment you made at 4:04: you state that machines are updated automatically with Scale Set. I just wanted to note that there's actually 3 update policies with VMSS: Automatic, Manual & Rolling. Thanks

[@AdamMarczakYT]

Yea, I meant that the entire process of updating OS is automatic. You are correct on policies which provide you certain degree of control over this automated OS update process. Thanks!

[@ransandu]

Hey Adam, Thanks for putting up this. Really appreciated. One request, will you be able to do a series on APIM? specially Policies and Azure as function of APIM backend? Cheers

[@AdamMarczakYT]

APIM is definitely on the way! Got in on agenda, unfortunately there is still few important topics to cover but in Feb I should already have it out.

[@AdamMarczakYT]

An of course thanks :)

[@srinivasanrajagopalan3140]

Best explanation on LB..Can you do one video for Front door too..

[@AdamMarczakYT]

Thank you! Front door is definitely on the list. Can't wait! Although there is still few services and topics to cover before that. :)

[@shuchitatripathi4067]

Hi Adam, Thank you for explaining things so clearly. I am facing an issue. When I am doing curl localhost -usebasicparsing, it is giving me 'Unable to connect to the remote server'. and so, my loadbalancer is also not working properly. Any idea what can be the issue here?

[@AdamMarczakYT]

Hey! That's weird. Did you use the script that I provided for this tutorial? If so, maybe check if VMs got extension installed successfully.Thanks for watching :)

[@granandgity374]

Thank you

[@AdamMarczakYT]

You're welcome :)

Great videos!! Can you do one with load balancer and AKS?

[@gautam310781]

Hi Adam.. This is regarding balancing multi-tier applications by using both public and internal Load Balancer, how to route traffic from public load balancer to internal load balancer

[@AdamMarczakYT]

Check this out docs.microsoft.com/en-us/azure/architecture/reference-architectures/n-tier/n-tier-sql-server?WT.mc_id=AZ-MVP-5003556 in general you LB isn't connected to another LB, it's the application to connect them

[@freeEagle21]

hey Adam. In my scenario i have two identical servers (having two different private IPs of course) and sophos XG sitting top of the servers. In XG the way i loadbalanced is that pushing traffic on both servers and it distributes the traffic. Since azure does not have a public dns url, which means i should be directing my application to the public IP only?

[@AdamMarczakYT]

Hey. Azure Load Balancer can have public DNS if it has public IP assigned. Go to your public IP configuration blade and set DNS name there.

[@the_justanything]

Thanks Adam, nice explanation. I have query on throttling number of concurrent requests. Can it be done at the Azure load balancer layer?

[@AdamMarczakYT]

Thanks. Load Balancer doesn’t have out of the box throttling. If you are building web application try api management policies.

[@deepmehrotra4205]

HI Adam , follwoing all your videos , very helpful in learning Azure. I am looking for some stuff that could explain how Azure Load Balancer interacts with Ingress controllers in AKS cluster. Specifically how it manages to separate/forward request for different namespaces in a cluster.

[@AdamMarczakYT]

Thanks! I might do this once I cover AKS service, thanks for the suggestion.

[@rediusengineering]

Hi Adam, You have been posting amazing videos and thanks for that. Could you please explain about how the traffic will flow to public load balancer when we have firewall placed in front of it. Lets say we have web application hosted internally and its load balanced using public facing load balancer. But I want the internet traffic to first hit the firewall before its sent internally. Where should the public DNS point to? My Firewall Public IP or Load balancer PIP? If its to my firewall, how that will be routed to my load balancer.

[@asriazmi]

Hi @adam marczak. Where do we set URL instead of using IP and how can we check the user id who hit the url?

[@ravimalvia]

do i need create outbound rule also? since azure done some changes in creating load balcncar

[@xilongjin8093]

Hello Adam, I really like the networking map in the video. Could you please tell me which tool you are using? appreciated it.

[@AdamMarczakYT]

Thank you, I've used Visio to draw those ;)

[@xilongjin8093]

@@AdamMarczakYT Excellent work, I'd like to pay for the course. :)

[@AdamMarczakYT]

I don't have any paid courses at this moment, everything is free and available here on KZbin, but I'm glad to have you here :) But if people want to donate they can use Patreon patreon.com/marczakio or Paypal www.paypal.me/marczakio but it's not necessary, happy to help!

great video, Do you know how to install ssl certificates to loadbalancer?

[@ganirban82]

HI, Suppose a web application used a sticky session (aka "session affinity") and use session for data holding purpose. Can we deploy this kind web application to VM scale sets as backed pool to an AG and use as URLs filtering purpose? If not possible then what is alternative solutions? Thanks,

[@AdamMarczakYT]

Remember to have external service for session persistency like Redis because with VMSS servers will go up and down which will kill sessions even with session affinity. AG or FD in front is always advised for public facing apps :)

[@elatromeo7963]

Thanks for this wonderful piece of art. How do I get the script??

[@sid0000009]

Thnks Adam! i want to understand in which cases we use a combination of AG + Load balance and when we use only load balance ( public facing) if we have a web app hosted in App service (ASE) in Azure. Does the web app determine it ? ( AG - https , LB for TCP is am aware ). Few architect diagrams have them in combinations and some standalone with web apps on Azure..Any guidance is appreciated. ! ( Merry Christmas - you are doing a fab job by sharing your knowledge with the community - Thank you 4 that )

[@AdamMarczakYT]

There is a cool guide for choosing appropriate load balancing option in Azure, check it out docs.microsoft.com/en-us/azure/architecture/guide/technology-choices/load-balancing-overview?WT.mc_id=AZ-MVP-5003556 thanks and merry christmas!

[@hermannsteveze5865]

Please, How Do we manage a Linux VM Scale Set behind a load balancer, from the internet?

[@AdamMarczakYT]

Hi. You mean common scale set tasks? If you here are examples docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-manage-cli

[@sureshn4642]

Why do I need a Load Balancer for an Availability Group Listener in Azure but not on-premises

[@NaveenKumar-cy6ec]

Adam could you please also explain application gateway and the key difference between these 3 services

[@AdamMarczakYT]

Application Gateway is surely on the list. For now check MS guide on differences and choices docs.microsoft.com/en-us/azure/architecture/guide/technology-choices/load-balancing-overview