Docker comes with a lot of advantages, which is why it has become one of the most desired tools in the software industry. And obviously, the only condition to enjoy these benefits is that, the Docker engine is to be installed on the machine.
Portability of the software easily:
Just make the app/microservice, build the image, push it to docker registry. Boom! Now anyone can access it.
Ease of using:
Once you get the docker image of the app/microservice, just run it. And now, you can seamlessly interact with the app without going through the hassle of installing the packages, modules, os, etc. Thus, the app/microservice runs the exact same way on every docker host machine.
Docker promotes service-oriented architecture. This means that various services(also regarded as microservices) needed for the app functionality can be separated into individual containers. Thus docker offers the flexibility to individually deal with the microservices. As the microservices are isolated from one another, each microservice can be changed/updated without disturbing the others.
Docker can be installed on any machine, and thus docker containers can run anywhere, be it on the local machine of the developer, virtual machines, machines on the cloudlike AWS, GCP or Azure.
Since the microservices of an app are isolated from each other, they can be scaled as per the need.
Cost-effective usage of resources:
Unlike VMs, we don’t need to go for dedicated OS or hardware. Docker enables the usage of resources as per the need, thus being a cost-effective solution.