[Google Cloud] Getting Started with Docker

I'll skip it until I get to the gcloud command line tools.

List active account names

gcloud auth list

output:

Credentialed accounts:
 - <myaccount>@<mydomain>.com (active)

List project IDs

gcloud config list project

output:

[core]
project = <project_ID>

Hello the world

docker run hello-world

Check the container image pulled from Dockerhub with Docker images

docker images

output

REPOSITORY     TAG      IMAGE ID       CREATED       SIZE
hello-world    latest   XXXXXXXXX      X days ago    X.XX kB

Display a list of running containers

docker ps

If you enter -a, containers that have not been started will also be displayed.

Build

Create a directory

mkdir test && cd test

Create a Dockerfile (omitted)

Create the source code file of the application (omitted)

Build the image

docker build -t [image name]:0.1 .

-t maps the image name to the tag name. name: tag If you do not define a tag name, it will be recorded as latest by default.

Run

docker run -p 4000:80 --name my-app [image name]:0.1

You can name the container name with --name.

Stop and rm the container

docker stop my-app && docker rm my-app

You can run the container in the background

docker run -p 4000:80 --name my-app -d [image name]:0.1

Use -d.

docker logs [container_id]

If you want to check the container log, execute the above command. If you can identify the container with the first few letters of container_id, you don't have to enter all the ids.

Modify the source code and upgrade the tag

docker build -t [image name]:0.2 .

docker run -p 8080:80 --name my-app-2 -d [image name]:0.2

curl http://localhost:8080

Check if the container was built correctly.

debug

docker logs -f [container_id]

If you want to check the log while moving the container, use -f.

Publish

Push your own image to Google Container Registry

[hostname]= gcr.io [project-id]= your project's ID [image]= your image name [tag]= any string tag of your choice. If unspecified, it defaults to "latest".

gcloud config list project

Find out the project ID.

docker tag [image name]:0.2 gcr.io/[project-id]/[image name]:0.2

Tag the image.

docker push gcr.io/[project-id]/[image name]:0.2

Push the image to gcr.

You can see the image pushed in Navigation menu> Container Registry. You can also check it at http://gcr.io/[project-id]/[image name].

docker stop $(docker ps -q)
docker rm $(docker ps -aq)

You can stop and delete the container in the development environment.

docker rmi [image name]:0.2 gcr.io/[project-id]/[image name] [image name]:0.1
docker rmi [image name]:[tag]
docker rmi $(docker images -aq)
docker images

After deleting the child image, delete the parent image.

docker pull gcr.io/[project-id]/[image name]:0.2
docker run -p 4000:80 -d gcr.io/[project-id]/[image name]:0.2
curl http://localhost:4000

If you want to start the container again in the development environment, docker pull the image stored by gcr and docker run.