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hello-world
docker run hello-worldbala:~/environment/fortune_app (master) $ docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 9db2ca6ccae0: Pull complete Digest: sha256:4b8ff392a12ed9ea17784bd3c9a8b1fa3299cac44aca35a85c90c5e3c7afacdc Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/engine/userguide/
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docker/whalesay
docker pull docker/whalesaydocker run docker/whalesay cowsay hellobala:~/environment/fortune_app (master) $ docker run docker/whalesay cowsay hello _______ < hello > ------- \ \ \ ## . ## ## ## == ## ## ## ## === /""""""""""""""""___/ === ~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ / ===- ~~~ \______ o __/ \ \ __/ \____\______/
Download the App from the following repo.
We will be using this demo fortune_app for this docker workshop. Its a simple Node.js app, which tell random sfortune. The app will be started on PORT 3000 by default. But you can still override by passing PORT env variable.
git clone https://github.com/balaprasanna/fortune_app.git
Also create an account in docker hub if dont have. We will need this to push our images to public / private registry in the later part of the demo.
Link for our base image
FROM node:alpine
WORKDIR /app
COPY package.json .
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]
docker build -t myapp:latest .
bala:~/environment/fortune_app (master) $ docker build -t myapp:latest .
Sending build context to Docker daemon 56.32kB
Step 1/7 : FROM node:alpine
alpine: Pulling from library/node
8e3ba11ec2a2: Pull complete
0cbaf23af500: Pull complete
c53714e0a6af: Pull complete
Digest: sha256:e9a83aa3e7ea576b93a21195f2e318ef8075ceccbebaa8f6c333294e9aa51dbd
Status: Downloaded newer image for node:alpine
---> 4e50ad7c0e0b
Step 2/7 : WORKDIR /app
Removing intermediate container 18e6f811388f
---> b75d246ba795
Step 3/7 : COPY package.json .
---> 8aaa70ec520e
Step 4/7 : RUN npm install
---> Running in 04fd854efa40
> [email protected] postinstall /app/node_modules/fortune-teller
> node lib/convert
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN [email protected] No description
npm WARN [email protected] No repository field.
added 51 packages from 48 contributors and audited 120 packages in 2.371s
found 0 vulnerabilities
Removing intermediate container 04fd854efa40
---> 76bd0fd7119d
Step 5/7 : COPY . .
---> 3969cb19cf2b
Step 6/7 : EXPOSE 3000
---> Running in 3193faafab0e
Removing intermediate container 3193faafab0e
---> f4335a3a0cf0
Step 7/7 : CMD ["npm", "start"]
---> Running in ac62595f0093
Removing intermediate container ac62595f0093
---> 1eeea450f741
Successfully built 1eeea450f741
Successfully tagged myapp:latest
docker images
bala:~/environment/fortune_app (master) $ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
myapp latest 1eeea450f741 3 minutes ago 81.7MB
node alpine 4e50ad7c0e0b 10 days ago 70.6MB
lambci/lambda nodejs4.3 6c30c5c1b1e0 8 weeks ago 969MB
lambci/lambda python2.7 377732dd7a1f 8 weeks ago 974MB
lambci/lambda python3.6 acf16b1d5297 8 weeks ago 1.1GB
lambci/lambda nodejs6.10 da301bf4fe34 8 weeks ago 1.02GB
docker run -d -p 3000:3000 --name app0 myapp:latest
Explainations:
--name Name for your container
-p 3000:3000 Port mapping from host 3000 to container 3000
-d Deamonized (Run the container in Background)
myapp:latest Name of the image (myapp) & its tag (latest)
docker ps
bala:~/environment/fortune_app (master) $ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
92b2ebaa21b5 myapp:latest "npm start" 2 seconds ago Up 1 second 0.0.0.0:3000->3000/tcp app0
curl localhost:3000, Thats where the application is running.
bala:~/environment/fortune_app (master) $ curl localhost:3000
In marriage, as in war, it is permitted to take every advantage of the enemy.
bala:~/environment/fortune_app (master) $ curl localhost:3000
Almost anything derogatory you could say about today's software design
would be accurate.
-- K.E. Iverson
bala:~/environment/fortune_app (master) $
Hint: You can use the EC2 public ip of the EC2 machine which supports the Cloud9 IDE to reach your app. Since you already exposed 3000 port, make sure inbound rules are set to reach your EC2 machine on PORT 3000
Use the container id to stop the container
docker stop 92b2ebaa21b5
Use the container name to stop the container
docker stop app0
Use can either use container name or id to start / stop contianers.
docker start app0
docker run -d -p 3001:3000 --name app1 myapp:latest
docker run -d -p 3002:3000 --name app2 myapp:latest
docker run -d -p 3003:3000 --name app3 myapp:latest
Step 1: You need to create a docker hub accont for this. Please register if you dont have an account.
Step 2: Do a docker login in command line.
docker login
When promted please enter username & password.
bala:~/environment/fortune_app (master) $ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: <your username>
Password:
Login Succeeded
Step 3: Tag your image with your username infront
docker tag myapp:latest balanus/fortune-app:latest
Step 4: Verify the tagged image by running docker images
bala:~/environment/fortune_app (master) $ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
myapp latest 1eeea450f741 29 minutes ago 81.7MB
balanus/fortune-app latest 1eeea450f741 29 minutes ago 81.7MB
node alpine 4e50ad7c0e0b 10 days ago 70.6MB
lambci/lambda nodejs4.3 6c30c5c1b1e0 8 weeks ago 969MB
lambci/lambda python2.7 377732dd7a1f 8 weeks ago 974MB
lambci/lambda python3.6 acf16b1d5297 8 weeks ago 1.1GB
lambci/lambda nodejs6.10 da301bf4fe34 8 weeks ago 1.02GB
Step 5: Finally, push the image using docker push
docker push balanus/fortune-app:latest
bala:~/environment/fortune_app (master) $ docker push balanus/fortune-app:latest
The push refers to repository [docker.io/balanus/fortune-app]
f41d5bed9291: Pushed
d9df74bc7450: Pushed
c8f8f4a9df78: Pushed
48cb9c80d7bb: Pushed
287ef32bfa90: Mounted from library/node
ce291010afac: Mounted from library/node
73046094a9b8: Mounted from library/node
latest: digest: sha256:c0112775a24091482665ec43fd6fda0b854dd0417ade411aba458a3b6c01955c size: 1784
By default, all docker images that your push will be a private image.
Please login to your docker hub account and change it to a public repo.
From Private repo to Public repo. So that , we can use this image to run in K8S later.