This video explains the use of HTTP status codes 401, 403 and 409 along with an example.
Monday, May 3, 2021
Monday, April 19, 2021
This video explains the need of changing the deployment token, which gets generated while pushing our Azure Static Web App code on GitHub. It also talks about from where and how to get this token changed.
Sunday, April 18, 2021
This video explains how to use Azure Static Web Apps (Preview) Extension to setup CI/CD with GitHub repository. It also explains about, how to push the code to GitHub, build and deploy it from VS Code.
Sunday, April 11, 2021
Recently, I’ve recorded a video which demonstrates how to get rid of typographic errors which we may have left while writing logic. As it is very usual that, while writing logic, sometimes we are in so hurry that we do not verify variable names or say class names. So, to help with all this, Visual Studio has an extension called Code Spell Checker. This video will throw some light on how to install this extension and how to use that. Have a look:
Sunday, April 4, 2021
Recently, I’ve recorded a video which demonstrates how to get started with C# development on Visual Studio Code. I provided a brief overview of this editor and also spoke about what all extensions are required to set up, in order to make developer’s life easy. One will also get to learn about how to create a solution file and a project from scratch using commands.
Tuesday, March 30, 2021
For any web application to work there has to be an associated end point, which means whenever users sends a request, endpoint is the first thing which gets hit. If I say in simple term, endpoint is an internet facing service which could be hosted either in Microsoft Azure or outside of Azure.
What is Azure Traffic Manager
Now what is Traffic Manager? As it’s name suggests, it manages the traffic. It distributes the traffic across various Azure regions along with health monitoring capabilities. So, if you are planning for a multi-region support with high availability, it could be a perfect service for you.
Now, you must be thinking, what is the core which is making this happen? Actually it uses the DNS to route traffic to endpoints based on the selected Traffic Manger profile and the configured routing mechanisms. I’ll shortly mention about what all routing methods are available but before that let’s take a quick look at some of the major benefits which we can achieve using Traffic Manager.
Benefits of using Azure Traffic Manager
- Traffic Manager provides automatic failover whenever endpoint goes down as it keeps monitoring the end points.
- In case of planned maintenance activity, Traffic Manager redirects the traffic to other end points which are configured. So, we need not to worry about any downtime windows.
- Traffic Manager has the ability to perform calculation to know which end point will provide lowest latency to the user. In a way, Traffic Manager improves the responsiveness by redirecting the traffic to such end points.
- Another important capability of Traffic Manager is, it not only supports Azure end points, but it also go hand-in-hand with external non-Azure endpoints.
- And lastly, Traffic Manager allows to combine multiple routing methods to achieve any complex business scenarios using nested profiling mechanism.
Ways to manage traffic
Currently, there are 6 ways once can manage DNS routing.
This method is useful, when endpoints are configured in different geographic locations and one wants to select the closet one, in terms of lowest network latency.
In this method, one can create endpoints with designated weights, ranging between 1 and 1000 and based on the weight, traffic is redirected accordingly.
This method route users based on the geo location or say, it works based on the geography their DNS query originates from. It may look similar to performance but actually it’s different. The best use case, I can think of is, let’s say due to some compliance and government regulations one wants all the traffic from EAST US to be redirected to WEST US endpoint. So, this can be achieved by selecting the geo based profile.
As it’s name says, it works on the basis of assigned priority. So, whichever endpoint is having higher priority, traffic would be redirected to that one. By any chance, if endpoint having highest priority is down or not healthy, request will automatically be redirected to the endpoint which is assigned as 2nd highest priority and it keeps going on. Such routing method is very useful in disaster recovery scenarios.
In this type of routing method, there exists multiple endpoints for a single client request. One caveat here is, one can not go with server name mappings and has to mandatorily go with IPv4 or IPv6 one. Unfortunately, I couldn’t find any real-time use case here.
This method allows to map range of IP addresses to specific endpoints. Say, you want certain users or to be specific certain IP addresses to always use WEST US endpoint and rest all can use other end points then this routing method can be used.
Well enough of theory. Let’s have a look at practical example of how priority based DNS routing works.
Thursday, March 25, 2021
By default, Visual Studio doesn’t enable preview feature selection in Visual Studio 2019. Say you have .Net 5.0 installed on your machine and you are creating a new Console Application.
Monday, March 22, 2021
In this article, we will learn how to get notification whenever something is changed in Azure Storage. Let’s say, we want our application to get notified whenever any new file is uploaded to the blob or say any file is deleted from the blob. How can we do that?