Dockerizing your apps

Building Docker Images

app

Approaches

Imperative

registry

1. pull image

2. run container 

3. copy source code 

4. build/compile

5. commit

6. push

Steps

dockerfile

FROM

RUN

COPY

EXPOSE

CMD

dockerfile

FROM

RUN

COPY

EXPOSE

CMD

docker build

http://hub.docker.com

http://store.docker.com

sign up

Building Image for Worker App

worker

• Java App

• Maven

registry

Worker app

https://gist.github.com/initcron/f35f7854a8176374a48963ed8aae0b8e

Application Code

Image creation instructions (Manual)

https://github.com/schoolofdevops/voting-app-worker

registry

host

Build Stage

registry

host

package Stage

Dockerfile

Dockerfile

FROM microsoft/dotnet-samples:aspnetapp

WORKDIR /app

RUN mkdir C:\site

ENTRYPOINT ["cmd"]

src: https://gist.github.com/initcron/43c9f6a6dee1e0977950cbf326323763

build

docker image build -t <dockrhub user id>/app:v2 .

docker image ls 

dot (current directory)

test image

docker container run -idt --name workertest2 <dockrhub user id>/app:v2 

docker container ls 

docker logs workertest2

docker image tag  <dockrhub user id>/app:v2  <dockrhub user id>/app:latest

docker image ls 

docker image push <dockrhub user id>/app:latest

docker image push <dockrhub user id>/app

Tag

publish

push

docker image push <dockrhub user id>/app:latest

docker image push <dockrhub user id>/app