DevOps

Question 1

How do you create a docker image?

Answer 1

docker run -p localport:conatinerport {-d optional} {–name optional} imagename

Question 2

How to detach the running docker from terminal?

Answer 2

By adding -d

docker run -p -d localport:conatinerport {-d optional} {–name optional} imagename

Question 3

How do you get a new image from repo in docker

Answer 3

Docker pull nameofimage

Question 4

How to build an image on docker

Answer 4

docker build -t{tagname} .

Question 5

What is docker network?

Answer 5

Docker networking enables a user to link a Docker container to as many networks as he/she requires. Docker Networks are used to provide complete isolation for Docker containers.

Question 6

Explain the steps in dockerization

Answer 6

1. docker pull image
2. docker run -p {p1:p2} –name name image
3. create Dockerfile
4. docker build -t appname .
5. docker run -p {p1:p2} –name name -e dbhost -e dbname image // this fails
6. docker netwoek create net-name
7. docker network connect net-name appname
8. docker run -p {p1:p2} –name name –net netname -e dbhost -e dbname image //shudnt fail

Question 7

How to push a docker image to dokcer hub?

Answer 7

1. give tag names for images with docker image tag sourcename tagname
2. docker push username/taggname