Thursday, September 29, 2016

Building images with a Dockerfile

Our first Dockerfile

# Version: 0.0.1
FROM ubuntu:14.04
MAINTAINER James Turnbull ""
RUN apt-get update
RUN apt-get install -y nginx
RUN echo 'Hi, I am in your container' \

The Dockerfile contains a series of instructions paired with arguments. Each instruction, for example FROM, should be in upper-case and be followed by an argument: FROM ubuntu:14.04. Instructions in the Dockerfile are processed from the top down, so you should order them accordingly.
Each instruction adds a new layer to the image and then commits the image.

Building the image from our Dockerfile

$ sudo docker build -t="jamtur01/static_web" .
Sending build context to Docker daemon 2.56 kB
Sending build context to Docker daemon
Step 0 : FROM ubuntu:14.04
---> ba5877dc9bec
Step 1 : MAINTAINER James Turnbull ""
---> Running in b8ffa06f9274
---> 4c66c9dcee35

Pushing images to the Docker Hub

We push images to the Docker Hub using the docker push command.
$ sudo docker push jamtur01/static_web
The push refers to a repository [jamtur01/static_web] (len: 1)
Processing checksums
Sending image list
Pushing repository jamtur01/static_web to (1↩
. . .

SOURCE:TheDockerBook by James Turnbull

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