Docker: Difference between revisions

Revision as of 19:36, 13 November 2020

Docker is a system for building, deploying and running complex images of a program with its runtime.

With the rise of cloud computing the need arose to give users an easy way to create a run-time package that could be sent to any cloud Platform as a Service provider (PaaS) with complete interoperability.

Docker was released in 2013 and solved many of the problems that developers had running containers end-to-end. It had all these things:

When you run a Docker container, these are the steps Docker actually goes through:

Download the image
Unpack the image into a "bundle". This flattens the layers into a single filesystem.
Run the container from the bundle

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 *With the rise of cloud computing the need arose to give users an easy way to create a run-time package that could be sent to any cloud Platform as a Service provider (PaaS) with complete interoperability.
 ==Solutions==
- When you run a Docker container, these are the steps Docker actually goes through:
+Docker was released in 2013 and solved many of the problems that developers had running containers end-to-end. It had all these things:
+# A container image format
+# A method for building container images (Dockerfile/docker build)
+# A way to manage container images (docker images, docker rm , etc.)
+# A way to manage instances of containers (docker ps, docker rm , etc.)
+# A way to share container images (docker push/pull)
+# A way to run containers (docker run)
+When you run a Docker container, these are the steps Docker actually goes through:
 # Download the image
 # Unpack the image into a "bundle". This flattens the layers into a single filesystem.