Docker Questions

To pass dynamic configuration values to services at runtime

To define the Docker image to be used for a service

To configure the network settings for services

To specify the build context for a service's Dockerfile

docker images

docker start

docker run

docker ps

To enable parallel execution of build steps.

To simplify the process of building complex applications.

To improve network performance during the build process.

To reduce the size of the final Docker image.

To copy files from the host machine to the current build stage.

To copy files from the current build stage to a later build stage.

To copy files from a remote repository to the current build stage.

To copy files from a previous build stage to the current build stage.

It caches the result of each individual command within a RUN instruction.

It does not cache the results of RUN instructions.

It caches the entire file system state after each RUN instruction.

It only caches the output of the RUN command if it has changed.

Docker Swarm stacks

Dockerfiles

Docker Compose files

Kubernetes Deployments

Docker automatically scales applications based on real-time traffic

Docker handles database migrations as part of the deployment process

Docker enables immutable deployments, ensuring consistent application versions across environments

Docker eliminates the need for orchestration tools like Kubernetes

docker inspect <container_name> | find 'IP'

docker inspect <container_name> | grep IPAddress

docker inspect -f '{{.NetworkSettings.IPAddress}}' <container_name>

docker inspect <container_name> --format IP

-t

-r

-d

-f

A copy of a Docker image stored on a different node

A load balancer that distributes traffic across multiple containers

An instance of a container running a specific task for a service

A backup of a manager node to ensure high availability