Containerzation with Docker
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This document discusses Docker containers and provides instructions on installing and using Docker. It defines Docker as a tool that makes creating and managing Linux containers easy. It then covers downloading and installing Docker, creating Docker images using Dockerfiles or tar files, running containers from images, mapping container ports, and pushing image updates. It also provides examples of using Docker on Amazon Web Services instances.
![Docker
Conclusion
Whoami
Defn
Installing Docker
Images
Containers
Running services
Port mappings
AWS
Limitations
Dockerfile. . .
# Add files.
ADD root/.bashrc /root/.bashrc
ADD root/.gitconfig /root/.gitconfig
ADD root/.scripts /root/.scripts
# Set environment variables.
ENV HOME /root
# Define working directory.
WORKDIR /root
# Define default command.
CMD ["bash"]
Muna A.H @abdimuna1 Containerization with Docker](https://image.slidesharecdn.com/containerzationwithdockerabdimuna-150926114144-lva1-app6891/85/Containerzation-with-Docker-21-320.jpg)
![Docker
Conclusion
Whoami
Defn
Installing Docker
Images
Containers
Running services
Port mappings
AWS
Limitations
Actual test
oot@f12aec10cab9:/# curl --help | less
curl --help | less
Usage: curl [options...] <url>
Options: (H) means HTTP/HTTPS only, (F) means FTP o ...
--anyauth Pick "any" authentication meth ...
-a, --append Append to target file when upl ...
--basic Use HTTP Basic Authentication ...
--cacert FILE CA certificate to verify peer ...
--capath DIR CA directory to verify peer ag ...
-E, --cert CERT[:PASSWD] Client certificate file a ...
--cert-type TYPE Certificate file type (DER/PE ...
Muna A.H @abdimuna1 Containerization with Docker](https://image.slidesharecdn.com/containerzationwithdockerabdimuna-150926114144-lva1-app6891/85/Containerzation-with-Docker-28-320.jpg)
![Docker
Conclusion
Whoami
Defn
Installing Docker
Images
Containers
Running services
Port mappings
AWS
Limitations
Aws config. . .
Post config & verification
1 Log out/in to pick up new docker permissions.
2 Verify that the ec2-user can run docker commands without
sudo.
[ec2-user]$ docker info
Muna A.H @abdimuna1 Containerization with Docker](https://image.slidesharecdn.com/containerzationwithdockerabdimuna-150926114144-lva1-app6891/85/Containerzation-with-Docker-43-320.jpg)
Containerzation with Docker
- 1. Docker Conclusion Containerization with Docker Muna A.H @abdimuna1 September 25, 2015 Muna A.H @abdimuna1 Containerization with Docker
- 2. Docker Conclusion Outline 1 Docker Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations 2 Conclusion Muna A.H @abdimuna1 Containerization with Docker
- 3. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations #whoami Name: @abdimuna1; From: DAR; Mcs: Informatic & comp Engineering; Day Job: AIMGROUP(T) a enior Developer; Night Job: Independent ecurity Researcher. Muna A.H @abdimuna1 Containerization with Docker
- 4. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations What’s docker? Docker is an open-source project that makes creating and managing Linux containers really easy. Containers are like extremely lightweight VMs they allow code to run in isolation from other containers but safely share the machine resources, all without the overhead of a hypervisor. Muna A.H @abdimuna1 Containerization with Docker
- 5. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Docker download Link To download docker for both Mac OSX and Windows, follow this link https://www.docker.com/toolbox Muna A.H @abdimuna1 Containerization with Docker
- 6. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Installation Hint By Installing the docker toolbox, you’ll have installed docker-machine which is the docker’s daemon and docker itself as the client, for connecting to the docker VM aka daemon or docker-machine. Muna A.H @abdimuna1 Containerization with Docker
- 7. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Lets check old way of doing things. Lets install Ruby stack on ubuntu $time apt-get install -y -q ruby1.9.1 ruby1.9.1-dev rubygems build-essential libopenssl-ruby1.9.1 libssl-dev zlib1g-dev Reading package lists... Building dependency tree... The following extra packages will be installed: .... Setting up libalgorithm-merge-perl (0.08-2) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place real 1m22.470s Muna A.H @abdimuna1 Containerization with Docker
- 8. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Old . . . Installing dependencies, aka dependencies hell $apt-get install -y nodejs ... E: Unable to locate package nodejs Muna A.H @abdimuna1 Containerization with Docker
- 9. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Starting Docker Starting and stopping docker on OSX To start the docker machine aka daemon on Mac os x run this command 1. docker-machine start default To check current machine/computer’s IP address run this 2. docker-machine env <NameOfTheMachine> docker-machine env default Muna A.H @abdimuna1 Containerization with Docker
- 10. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Starting Docker Starting and stopping docker on OSX. . . To configure your shell run this command: eval "$(docker-machine env default)" Then after those 3 above steps you can run Docker by docker run -it ubuntu bash Muna A.H @abdimuna1 Containerization with Docker
- 11. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Starting Docker Starting and stopping docker on OSX. . . Summary for starting docker on OSX 1 docker-machine start default 2 docker-machine env 3 eval "$(docker-machine env default)" then run any container of your need Muna A.H @abdimuna1 Containerization with Docker
- 12. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Docker’s way Dockerfile FROM ubuntu:12.04 RUN apt-get update ## MYSQL RUN apt-get install -y -q mysql-client libmysqlclient-dev RUN apt-get install -y -q ruby1.9.1 ruby1.9.1-dev rubygems1.9.1 irb1.9.1 build-essential libopenssl-ruby1.9.1 libssl-dev zlib1g-dev Muna A.H @abdimuna1 Containerization with Docker
- 13. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Docker’s way. . . Building the app server root:/# time docker build -t="abdimuna/appserver" . Uploading context 92160 bytes Step 1 : FROM ubuntu:12.04 ---> 8dbd9e392a96 Step 2 : RUN apt-get update ---> Using cache ---> b55e9ee7b959 Step 3 : RUN apt-get install -y -q mysql-client libmysqlclient-dev ---> Using cache Muna A.H @abdimuna1 Containerization with Docker
- 14. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Docker’s way. . . Building the app server. . . ---> dc92be6158b0 Step 4 : RUN apt-get install -y -q ruby1.9.1 ruby1.9.1-dev Muna A.H @abdimuna1 Containerization with Docker
- 15. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations What’s an image? An image is software you load into a container. A Docker image, though, is capable of much more. An image can start software as complex as a database, wait for you (or someone else) to add data, store the data for later use. Muna A.H @abdimuna1 Containerization with Docker
- 16. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Creation There are two ways of creating images Muna A.H @abdimuna1 Containerization with Docker
- 17. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Ways of creating images 1-Dockerfile You can build images by using Dockerfile. 2-Using tar Building from a working machine that is running the distribution you like to package as a base image. Muna A.H @abdimuna1 Containerization with Docker
- 18. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Dockerfile A Dockerfile describes the software that is baked into an image. It isnot just ingredients tho, it can tell the software what environment to use or what commands to run. Muna A.H @abdimuna1 Containerization with Docker
- 19. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Dockerfile sample Example of docker file is show below # This image depends on ubuntu v14.04 # Ubuntu Dockerfile # # https://github.com/dockerfile/ubuntu # # Pull base image. FROM ubuntu:14.04 # Install. RUN sed -i ’s/# (.*multiverse$)/1/g’ /etc/apt/sources.list apt-get update && Muna A.H @abdimuna1 Containerization with Docker
- 20. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Dockerfile. . . apt-get -y upgrade && apt-get install -y build-essential && apt-get install -y software-properties-common && apt-get install -y byobu curl git htop man unzip && rm -rf /var/lib/apt/lists/* Muna A.H @abdimuna1 Containerization with Docker
- 21. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Dockerfile. . . # Add files. ADD root/.bashrc /root/.bashrc ADD root/.gitconfig /root/.gitconfig ADD root/.scripts /root/.scripts # Set environment variables. ENV HOME /root # Define working directory. WORKDIR /root # Define default command. CMD ["bash"] Muna A.H @abdimuna1 Containerization with Docker
- 22. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Using tar Creating an ubuntu base image $ sudo debootstrap raring raring > /dev/null $ sudo tar -C raring -c . | docker import - raring a29c15f1b $ docker run raring cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.04 DISTRIB_CODENAME=raring DISTRIB_DESCRIPTION="Ubuntu 13.04" Muna A.H @abdimuna1 Containerization with Docker
- 23. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Searching images To search an image in Docker hub docker search <ImageName> Muna A.H @abdimuna1 Containerization with Docker
- 24. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Listing images Listing images currently on the system. $docker images docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SI abdimuna/ubuntu v1.1 c9866b26495d 16 hours ago 221.1 MB ubuntu latest 91e54dfb1179 4 weeks ago 188.4 MB hello-world latest af340544ed62 6 weeks ago 960 B base/archlinux latest b97e110c94d9 12 weeks ago 278.8 MB moul/emacs latest e69384926ffd 3 months ago 298.3 MB training/webapp latest 02a8815912ca 4 months ago 348.8 MB Muna A.H @abdimuna1 Containerization with Docker
- 25. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Making changes Lets login % docker run -ti ubuntu /bin/bash docker run -ti ubuntu /bin/bash root@fb125040f4f6:/# Muna A.H @abdimuna1 Containerization with Docker
- 26. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Making changes. . . Test curl command curl bash: curl: command not found root@fb125040f4f6:/# Muna A.H @abdimuna1 Containerization with Docker
- 27. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Making changes. . . Installing curl to this image sudo apt-get update && sudo apt-get install curl Muna A.H @abdimuna1 Containerization with Docker
- 28. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Actual test oot@f12aec10cab9:/# curl --help | less curl --help | less Usage: curl [options...] <url> Options: (H) means HTTP/HTTPS only, (F) means FTP o ... --anyauth Pick "any" authentication meth ... -a, --append Append to target file when upl ... --basic Use HTTP Basic Authentication ... --cacert FILE CA certificate to verify peer ... --capath DIR CA directory to verify peer ag ... -E, --cert CERT[:PASSWD] Client certificate file a ... --cert-type TYPE Certificate file type (DER/PE ... Muna A.H @abdimuna1 Containerization with Docker
- 29. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Exit from container exit never returns! exit Muna A.H @abdimuna1 Containerization with Docker
- 30. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Commiting changes commit docker commit -m="added curl" 72d455ea abdimuna/ubuntu:v1.1 where: 72d468f455ea = container ID Muna A.H @abdimuna1 Containerization with Docker
- 31. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Pushing changes To push from development machine to remote repo $docker push abdimuna/appserver Muna A.H @abdimuna1 Containerization with Docker
- 32. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations On production machine Download the newly appserver docker pull abdimuna/appserver Muna A.H @abdimuna1 Containerization with Docker
- 33. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Deleting To delete an image docker rmi c9866b26495d Muna A.H @abdimuna1 Containerization with Docker
- 34. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations What is a container Defn A container is a stripped-to-basics version of a Linux operating system. Muna A.H @abdimuna1 Containerization with Docker
- 35. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Basic commands Some useful docker commands Commands: attach images pause build import port commit info ps cp inspect pull create kill push diff load rename events login restart exec logout rm export logs history pause Muna A.H @abdimuna1 Containerization with Docker
- 36. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Help ? Command usage docker diff --help Muna A.H @abdimuna1 Containerization with Docker
- 37. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Port mappings Use -P Port mappings can be achived by starting a container with -P option, example docker run -d -P training/webapp python app.py Muna A.H @abdimuna1 Containerization with Docker
- 38. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Port mappings Use -P . . . Here: -d = run in background mode -P = port map 1:1 from host to container Muna A.H @abdimuna1 Containerization with Docker
- 39. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Port mappings Use -P . . . Also you can specify by ports by $ docker run -d -p 80:5000 training/webapp python app.py Note: here non-capital letter -p is used where 80 port number of the host is mapped to 5000 port of the container. Muna A.H @abdimuna1 Containerization with Docker
- 40. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Aws config EC2 Instance preparation 1 Launch an instance with Amazon Linux AMI. 2 Connect to your instance 3 Update the installed packages and cache on your instance sudo yum update -y Muna A.H @abdimuna1 Containerization with Docker
- 41. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Aws config. . . Installing docker. . . 1 Installing docker, Recommended Ver > 1.5.0 sudo yum install -y docker 1 Start the docker service sudo service docker start Muna A.H @abdimuna1 Containerization with Docker
- 42. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Aws config. . . User/group setup 1 Add the ec2-user to the docker group so that you can exe Docker commands without sudo. sudo usermod -a -G docker ec2-user Muna A.H @abdimuna1 Containerization with Docker
- 43. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Aws config. . . Post config & verification 1 Log out/in to pick up new docker permissions. 2 Verify that the ec2-user can run docker commands without sudo. [ec2-user]$ docker info Muna A.H @abdimuna1 Containerization with Docker
- 44. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Security Containers have critical limitations in areas like OS support, visibility, risk mitigation, administration, and orchestration. This is especially true for the newer brands of containerization which do not (yet) have a significant management and security ecosystem. Muna A.H @abdimuna1 Containerization with Docker
- 45. Docker Conclusion Whoami Defn Installing Docker Images Containers Running services Port mappings AWS Limitations Scalability Containers face many challenges to scale. It’s one thing to do a Web app but it’s another thing to do a multitenant, complex enterprise app with a lot of data of interest. Muna A.H @abdimuna1 Containerization with Docker
- 46. Docker Conclusion Docker Yep Docker truly enables a separation of concerns. Microservices are ways to go. Many small servers beat a few big hosts. PPL need fast things! Docker security is getting more attention. Developers want to deploy apps and define infrastructure. Muna A.H @abdimuna1 Containerization with Docker
- 47. Docker Conclusion Outro ~ Thanks ~ Everything happens precisely. . . ! Muna A.H @abdimuna1 Containerization with Docker