I have two app services (web apps), running the same code, hosted in azure at.
web1.azurewebsites.net and web2.azurewebsites.net (and possibly webN.azurewebsites.net)
I want to have a single web address (for example https://web1.azurewebsites.net or just any web address) and a load balancer that shares the load between them from the incomming requests.
How do I set up this in Azure. I dont understand the terminology and the guides Ive found is old.
Ive managed to create a Load Balancer with a public (dynamic) IP, but I dont know what host name that would answer to, nor how to connected it to my app services)
Could anyone guide me, either just a tutorial (no generic links please), or some step by step instructions how to do it.
If you want to load balance multiple instances of the exact same app service, you can just scale out your app service plan to let Azure create the instances and do the load balancing for you.
If that doesn't work for your situation or you want to load balance across regions, use a Traffic Manager.
Related
I am creating a network with 2 app services, containing 2 slots each
I know the load balancers are designed to work with VM's, but I am wondering if it is possible to place a load balencer on these 2 app services to balance the load between them, Is it possible to do so??
When you Scale your Web App you add instances of your current pricing tier and Azure deploys your Web App package to each of them.
There's a Load Balancer over all your instances, so, traffic is automatically load balanced between them. You shouldn't need a Virtual Machine for this and you don't need to configure any extra Traffic Manager.
You may want to refer: scale your app in Azure App Service for more details.
but I am wondering if it is possible to place a load balencer on
these 2 app services to balance the load between them, Is it possible
to do so??
According to your description, maybe you are looking for Azure application gateway(layer 7).
Azure application gateway works at the application layer (Layer 7 in the OSI network reference stack). It acts as a reverse-proxy service, terminating the client connection and forwarding requests to back-end endpoints.
Azure application gateway support HTTP, HTTPS and Websockets.
Here is the features offered by each service:
More information about Application gateway, please refer to this article.
Maybe little late but I guess this what you are looking at
Scale Out- A scale out operation is the equivalent of creating multiple copies of your web site and adding a load balancer to distribute the demand between them. When you scale out a web site in Windows Azure Web Sites there is no need to configure load balancing separately since this is already provided by the platform.
https://azure.microsoft.com/en-us/blog/scaling-up-and-scaling-out-in-windows-azure-web-sites/
We have a new requirement, summary follows,
Around 30 sites to be developed.
Should use Umbraco.
All the sites should need have a common Umbraco backend.
Single SQL DB.
Some of the sites will be bilingual.
Load balancing architecture required.
We did the POC for the same with 3 sites in a single instance of umbraco by adding root nodes and assigning proper host name, permissions etc and it worked fine.
But in the real case, will it work smoothly ?
We checked the following article regarding flexible load balancing in Umbraco and planned to move with Azure as it is mentioned as the first choice in the article here.
Is anyone has any similar kind of experience ?
Please share, your help would be greatly appreciated.
AFAIK, Azure Web Apps support Built-in autoscale and load balancing. I assumed that web apps leverage Application Request Routing. ARR Affinity is enabled on your Azure App Service by default. This means that if you are running multiple instance of your App Service, clients will be directed to the same instance for each request. For more details, you could refer to here.
Also, you could leverage Traffic Manager with your azure web app for load balancing, which could distribute the traffic to your web app endpoints in different datacenters (global route traffic).
Here are some tutorials, you could refer to them:
Create a Traffic Manager profile
Scale up your app by changing the pricing tier, then you could get more CPU, memory, disk space, etc. For more details, you could refer to Scale up your pricing tier.
Scale out your app to multiple instances manually or automatically based on your configured performance peaks. For more details, you could refer to Scale instance count manually or automatically.
We have an application running in Azure that consists of the following:
A Web App front end, which talks to…
A WebApi running as a Web App as well, which can (as well as a couple other services) talk to…
A Cloud Service load balanced set of VMs which Are hosting an Elasticsearch cluster.
Additionally we have the scenario were dev’s whitelist their IPs so that their localhost version of the API can hit the VMs as well.
We have locked down our Elasticsearch VM’s by adding ACLs to the exposed end point. I whitelisted the outbound IPs that were listed on my App Services. I was under the mistaken impression that these were unique to my Api. It turns out that these are shared across the scale unit in Azure. Other services running in the same scale unit, could, if they knew the endpoint, access the data exposed on the endpoint in my cluster. I need to lock this down, and I am trying to find the easiest way. These are the things I am looking at, and I would appreciate advice and/or redirection.
Elastic Shield: Not being considered. This is a product by Elastic
that is designed to secure ES. This is ideal, but at the moment it
is out of scope (due to the cost and overhead)
List item
Elastic plugins: Not being considered. The main plugins (such as
Jetty) appear to be abandoned.
Azure VPN. I originally tried to set this up, but ran into too many
difficulties. The ACLs seemed to give me what I need without much
difficulty. I am not sure if I can set this up now. The things I
don’t know are:
I don’t think I can move existing VMs into a new VPN.
I think you have to recreate the VMs in that VPN from the get go
Could I move my Web App into the VPN? How does that work?
This would prob break my developer scenario as the localhost API
would not be able to access the VPN, right?
Add a certificate to requests: It would be ideal if I could have
requests require a cert or a header token. I assume to do this I
would need to create a proxy that would run on the VMs and do the
validation before forwarding the request on to my Elasticsearch.
Anything else? Is there another option I have not thought of?
Thanks!
~john
You can create a VPN point-to-site connecting your Web App with your IaaS VMs. This is the best solution because you will be able to use just internal IPs on your IaaS.
The easiest way to do that using Azure Portal is create a Web App and, create a new VPN and VNet using "setup" option at "Your Web App" -> Settings -> Networking -> VNET Integration -> Setup -> Create New Virtual Network.
After that, create your IaaS inside this new VNet.
You also can create a ARM template to create Web App, IaaS, VPN and everything that you need. Take a look at my ARM template to create PHP+MySQL using Web App and MariaDB Cluster connected by VPN: https://github.com/juliosene/azure-webapp-php-mariadb
I'm trying to add web app endpoints from the same location, to an azure traffic manager, when I try to do this, it tells me that App Service will use load balancing to do this for me, when we apps are in the same location.
My understanding is that load balancing is for distributing requests between multiple VMs on one web app. The plan was to use out single DNS and allow traffic manager to determine which endpoint to go to using round-robin or failover. How will load balancing know to direct to one of the web apps from this single address?
Azure Web Apps already have built in load balancing between instances within the web app. So for example if you have a web app with 10 instances under the endpoint: tester.azurewebsites.net, Azure load balances appropriately across those instances.
When you bring in traffic manager, that is looking for different endpoints to facilitate between. Incoming requests will be routed based on proximity to endpoints it is managing, load and if the endpoint is available. Traffic Manager takes care of all of those complexities for you.
This allows you to have a single endpoint myapp.azurewebsites.net; which may route to myapp-west.azurewebsites.net and myapp-east.azurewebsites.net. That routing as I indicated is based on proximity, load and availability.
How it actually works is the magic sauce of Azure Traffic Manager. I use it in production and it has been working very well for me. I primarily use it for routing based on proximity, and have yet to experience a failure on a web app to test a production failover reroute.
Hope that helps!
We have a client that we have setup two webservers running about a dozen different websites spread over each webserver for each site (so site 1 is running on both webservers, site 2 is running on both ect).
We want to setup load balancing (presumably with Traffic Manager) so that it will spread the load and monitor the sites availability across both the web servers per site and not per virtual machine like the regular Azure load balanced sets do.
It seems that traffic manager might be able to do this but we don't know how it works and the documentation is not clear to us about if we can setup the TM per website and not per web server (as we understand it).
Can we setup any load balancing in Azure that will monitor the website itself and not the virtual machine? Because we want to run multiple sites on these two web servers, how do we setup TM do allow this to happen? Do we make a new TM service for each website?
thanks in advance.
UPDATE: do we even need to setup the regular load balancing set at all? Can I not just create a TM and click on the cloud services of each of the web servers and then add the port and relative path to one of the websites? and just repeat this for each website on the two servers? would that be how it should be setup?
Thanks again.
The available endpoints you can define in your Traffic Manager definition is only as granular as your cloud service URLs. So, the quick answer to your question is no.
You may want to look into using Application Request Routing in front of your two servers instead. It does introduce additional server(s) in your configuration but will give you a way to load balance across the sites.
http://www.iis.net/downloads/microsoft/application-request-routing
The answer to this question was custom end points from traffic manager. This will allow Azure to be able to monitor the service for each service or website on a web server within Azure.