What is a ConfigMap in Kubernetes?

Today, in the world of application development, it's recommended to separate the configuration from the code. Kubernetes' ConfigMaps helps us do this. Create a ConfigMap ConfigMap allows you to define key and values or a properties file that can be used either at startup of the pod, or as a mount on the pod. https://gist.github.com/anjanashankar9/25cd25e6cc0ecb46da948f1b9b6578fe Create a configmap … Continue reading What is a ConfigMap in Kubernetes?

What is a causal inference?

Overview Causality is the relationship between a cause and effect. In distributed systems, ordering of events is challenging, as timestamps across nodes cannot be compared. This is where causality is useful in the distributed system. Causality and the happens-before relationship Let’s define an event as something happening at one node. This something can be either sending or receiving … Continue reading What is a causal inference?

What is a Zero Trust Network?

A zero trust network is exactly what its name implies, a completely untrusted network. It is also called permiterless security and provides five fundamental assertions on which to build the network: All the data sources and computing services are considered resources.All communication is secured, regardless of network location.Every device, user, and network flow is authenticated and authorized.Policies … Continue reading What is a Zero Trust Network?

Parsing command-line flags in Go

Golang has a built-in package called flag that enables one to parse command-line flags. The flag package allows you to define String, Bool, or Int flags. To be able to access the parameters passed as arguments to the command line execution of your program, three steps need to be completed. Define the flag.Bind the flag.Parse the flag. Syntax An example of how flag is used … Continue reading Parsing command-line flags in Go

Structure Equality in Golang

What is a struct in Go? A struct or structure in Go is a user-defined type. It helps with composing different types into a single unit. https://gist.github.com/anjanashankar9/d427d0cfe225c01c7631afd71153bdf7 When can you compare two structures? In order to compare two structures, it is imperative that all struct field types are comparable. If the variables being compared belong to different structures, then you will see a … Continue reading Structure Equality in Golang

Git submodules

Git submodules are a powerful way to use git as an external dependency management tool. It is basically a way to embed a repository into another. When you add a submodule in Git, the code of the submodule does not get added to the main repository, only certain information about the submodule does. It simply … Continue reading Git submodules

The Magic of Final Keyword in Java

In this post, we will discuss all things final in Java. Final Classes, Final Methods, Final Variables and finally Final Arguments. Final Classes Let us look at an example. We have a class A that is declared as final. https://gist.github.com/anjanashankar9/8adc9729a7b4d26d9bb110767b10d1fc Now let us try to create a subclass of A https://gist.github.com/anjanashankar9/5ad56b973687dab6c5bd60042ea5403a This will give a … Continue reading The Magic of Final Keyword in Java