Debug School: Poornima P V

Docker training - Day 3 : Assignment 1

Poornima P V — Wed, 16 Nov 2022 05:25:00 +0000

When you create a container with a tmpfs mount, the container can create files outside the container’s writable layer.
As opposed to volumes and bind mounts, a tmpfs mount is temporary, and only persisted in the host memory. When the container stops, the tmpfs mount is removed, and files written there won’t be persisted.
docker run -d -it --name tmptest --mounttype=tmpfs,destination=/app nginx:latest

Docker training : day 2 - Assignment 3

Poornima P V — Tue, 15 Nov 2022 07:05:18 +0000

Docker image is a collection of filesystem layers
SHA is used for encryption
Each docker image will have id
Overlay 2 is used for storing the image
All layers are merged when creating container

Docker training: Day3- Assignment 1

Poornima P V — Tue, 15 Nov 2022 04:54:50 +0000

Use of Docker update - is used to update container configurations to modify CPU resources and memory.
docker
Use of Docker wait - is used to wait until one or more containers stop and the give the exit codes

Docker training - Assignment 2

Poornima P V — Mon, 14 Nov 2022 10:26:00 +0000

What is the diff between docker stop and docker kill?
The docker stop command issue the SIGTERM signal
The docker kill command sends the SIGKILL signal and will forcefully stops the containers

what is the diff between docker pause and docker unpause
Pause suspends all processes and unpause resumes it.

Docker Training

Poornima P V — Mon, 14 Nov 2022 07:29:00 +0000

What is Docker?
Docker is a tool to create, ship and run applications. Basically, a container mgt tool.

Why Docker?
Multiple applications which uses same resources can be run at the same time by isolating the resources

What is Container?
Basic package of an application and libraries that could be run

Docker Workflow?
Docker build -> checks if it in hub -> if there will pull -> else creates a image-> docker run

How container is created?
A container is created with docker create command.