02 - DOCKER BASICS

Question 1

what are the issues with adding servers manually

Question 2

why do we need docker ?

Answer 2

docker provides environment isolation

Question 3

what is kubernetes ?

Answer 3

Kubernetes is a tool for running a bunch of different containers

Question 4

what is a kubernetes cluster

Question 5

hows is kubernetes managed

Question 6

sample dockerfile to containerize a project

Answer 6

FROM node:alpine
WORKDIR /app
COPY package.json
RUN npm install
COPY ./ ./
CMD [“npm”, “start”]

Question 7

what is the .dockerignore file

Question 8

command to build a docker image

Answer 8

docker build -t [tag-name] .

Question 9

create and start a container by image_id or tag

Answer 9

docker run [image-id or tag]

Question 10

create and start a container, overriding the default command

Answer 10

docker run -it [image-id or tag] [cmd]

Question 11

print out information about all of the running containers

Answer 11

docker ps

Question 12

execute the given command in a running container

Answer 12

docker exec -it [container id] [cmd]

Question 13

print out logs from the given container

Answer 13

docker logs [container id]