i have Service fabric Cluster Running on Azure ,i have deployed Application to Service Fabric.
Now i want to use azure Application Gateway on this Scenario like Request First served to Application Gateway and then it migrated to Fabric Load Ba-lancer. I am Quite Confused on this.How to meet above Challenges with ApplicationGateway
I also able to configure ApplicationGateway but dont have IDea how to use it for service fabric
Microsoft Azure Application Gateway offers layer 7 load balancing capabilities, SSL offloading, layer-7 routeing, cookie based session affinity, URL routeing and able to host multiple web application. Azure Application Gateway requires its subnet; sometimes it is confusing if you are not familiar with Azure VNet and Subnet segmentation.
First what you need to understand is the architecture pattern, how Microsoft Application Gateway would play a part in.
I have written some detail series documenting my journey throughout Azure ServiceFabric.
I would suggest you go through these posts, and it will explain Architecture viewpoint for having Application Gateway in front of Service Fabric Cluster.
Irrespective of Application Gateway, you would need Internal Loadbalancer or External Loadbalancer (depends on your topology).
Cloud Architecture Pattern: Azure Service Fabric and Microservices - Part 1 (Physical Architecture)
How to implement Application Gateway with Azure Service Fabric
Also try to understand how it is going to impact, security architecture of your implementation
Also, I would recommend you Reverse proxy in Azure Service Fabric.
Not fully sure your meaning, but you could create sf cluster and related resources using ARM teplates. Thats what I have done. I created appgw, cluster, vmss etc. In the virtualMachinesScalesets networkProfile you must configure the ApplicationGateway back endAddress pool instead of configuring loadBalancerBackendAddressPools. The appgw must exist before vmss deployment. You don't necessarily need lb at all. Appgw can handle the load balancing for you. Even though internal lb would bring in some nice additional features, which you could utilize later on...
I have to admit that these things are quite poorly documented...
Related
What is the difference between reverse proxy provided by APIM (API gateway) and Service fabric?
I am reading that the API gateway provided by APIM provides for reverse proxy.
Also, the service fabric also provides gateway (thus reverse proxy).
The API Management instance is meant to allow you to manage external access to your APIs, Functions, etc. hosted on Azure or on-premises environment, as long as you ensure connectivity between your Azure tenancy and your on-premises environment. The Service Fabric Gateway Service and Reverse Proxy Service are meant to manage exclusively the communication of your Service Fabric cluster. So, by using the Service Fabric Reverse Proxy, it is possible for a gateway service to intercept the traffic and forward it to the relevant service type in Service Fabric Reverse Proxy. Then the proxy is able to handle the complexity in finding the relevant container location and address to forward the incoming traffic.
So, to summarize, the API Management is meant to manage access control, apply policies and more for most of your applications hosted in Azure that have external users or apps accessing it. And the SF Gateway and Reverse Proxy is dedicated to Service Fabric, but these services do not manage access control. That's managed on your Access Control List, please see this article for more information.
Last, but not least, in case your service fabric application has external users accessing it, i would recommend you to consider to integrate API Management with your Service Fabric cluster, see more here.
I have 2 same Web App and I have added them to application gateway's backed pool in Azure.
I have one domain for the application Gateway and I can bind only one web app to it.
Is there any way to add 2 Web App with the same domain of application gateway?
If not, then any other way to achieve high availability for Web Apps?
I want that if one Web App is not reachable, the traffic should go to other Web App. The Web Apps are not stateless and therefore ruled out the use of Traffic Manager Profile due to lack of Session Persistence.
I have gone through various questions mentioned below on the same topic, but none is related or have satisfactory solution.
- DNS: High Availability with Azure Web Apps + Traffic Manager
- Achieving High Availability using Azure Traffic Manager
- Is it possible that one domain name has multiple corresponding IP addresses?
For App Service, Application Gateway cannot be used for Load balancing Purpose. You can use Application Gateway as WAF. In your scenario, as Thomas stated, AFD would be the best option.
You can leverage the priority option which can be configured while adding App Service to the backend pool to achieve your ask.
You can assign priorities to your different backends when you want to use a primary service backend for all traffic, and provide backups in case the primary or the backup backends are unavailable.
In this case, when the probe to the Primary goes down, then the traffic will be routed to the secondary Web App.
Reference: https://learn.microsoft.com/en-in/azure/frontdoor/front-door-routing-methods
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/
Currently I have a Service Fabric cluster with 2 stateless services hosting Asp Web APIs. While creating the cluster also appropriate Azure Load Balancers got created.
Now I would like to add Application Gateway in front of my cluster for various reasons like SSL offloading, url-routing etc.
I'd like to understand how to configure the Application Gateway correctly. I see 2 options, not sure which one is valid:
Application Gateway replaces the existing Load Balancer and points directly to SF services hosting WebApi
I keep existing LB configuration and Application Gateway points to this LB (seems like 1 LB solution too many)
Which one is correct? Any advise how to configure?
Approach 2 is what we are using, We have kept the load balancer and that is routing any request received from the Application Gateway. We found this to be easiest and simplest choice, as this involves minimum changes to be done in Application Gateway.
Your two web api's can run on every node in the VM scale set. The Azure Load Balancer is used to distribute traffic over those nodes. Targeting a single service on a single node will reduce scalability and fault tolerance.
You could use the App Gateway to translate incoming request to different ports on the Load Balancer. (E.g. direct traffic to API 1 #url ~/1/ and API 2 #url ~/2/)
Favor using load balancing rules (using all nodes) over NAT redirections (to single nodes). This way you'll have a performant, reliable system.
Solution 2 would also provide possibly to create VPN connection e.g to manage your cluster. Then no need to expose management endpoint to the public. Internal lb also brings on additional features to utilize in the future.
I would go with your first option and to implement it create / modify your ARM template so that it doesn't contain the load balancer and instead contains the application gateway.
Here is a link to the quick starts for ARM templates which you can use. There isn't an out of the box example for service fabric with a gateway but it will give you a great starting place.
link
I'm considering Reliable Actors right now that's part of Service Fabric. I have an existing Web App that I'd like to keep and act as an API surface to my actors. The Web App will also handle authentication and authorization before any calls get to my actors.
I can't tell from the documentation, but is it possible to connect a Web App to Service Fabric? Additionally, is it possible to limit connections to Service Fabric so that it doesn't except any public connections? How would I go about setting this up, or is it even advisable to do something like this?
I know with Cloud Services, you can connect a Cloud Service to a Web App through a Virtual Network, so I'm at least familiar with that kind of setup.
You would do it the same way you do with cloud services - use a virtual network. Service Fabric is just a framework running on VMs in a cloud service.
Connection to the service fabric can be controlled through the loadbalancers in the cluster VNET. I would suggest that you integrate the WebApp into the Service fabric cluster VNET, to do that you will have to add a VNET gateway