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Introduction to container based virtualization with docker

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Bangladesh Network Operators Group
Bangladesh Network Operators Group

This document provides an overview of Docker and the author's experience. It discusses key Docker concepts like images, containers, the Dockerfile and Docker Engine. It also summarizes Docker benefits like portability, scalability and efficiency. Components like Docker Hub, Docker Machine and orchestration tools are briefly introduced. Security considerations and using Docker in production are also mentioned.

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About Me MD. Al-Amin Talukdar 3+ year experience in IT DevOps Engineer RHCSA, RHCE
Old Way
Virtualization
Container Based Virtualization
Container vs VM
Container vs VM • Containers are more lightweight. • No need to install guest OS. • Less CPU, RAM, Storage needed. • More containers per machine than VM. • Greater Graterility.
What is Docker? Docker is a platform for developing, shipping & running application using container based virtualization technology.
How Docker Works
Components of Docker • Docker File • Docker Images • Docker Engine • Docker Container • Docker Hub • Docker Machine • Docker Swam • Docker Compose • Kitematic
Docker Image • A Docker image is a binary that includes all of the requirements for running a single Docker container, as well as metadata describing its needs and capabilities.
Docker File • A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Using docker build users can create an automated build that executes several command-line instructions in succession. • Dockerfile is used for automation of work by specifying all step that we want on docker image.
Docker Container • Images are read only containers used to create containers. • Built by you or other Docker Users. • Stored in docker hub or your local repository
Docker Engine • Docker Engine is the program that enables containers to build shipped & run. • Docker Engine uses Linux Kernel namespace & control group. • Namespace gives us the isolated workspace.
Installing Docker & Running Hello World Install docker with command # curl -sSL https://get.docker.com/ | sh Run the hello world container to test your installation # sudo docker run hello-world *Installation instruction areavailable at https://docs.docker.com/engine/installation/
Registry & Repository • Where we store our image is known as registry • You can use your own registry or docker's public registry. Known as Docker Hub
Docker Hub • Docker hub is the public registry that contains large amount of images available for your use. • Official Repositories are available at https://hub.docker.com/explore/
Intro to Images 1. Go to https://hub.docker.com/ and sign up for an account. 2. Find your confirmation email and active your account. 3. Explore images from docker hub. 4. Understanding official Images, Tags 5. Search images on docker hub.
Docker Orchestration Three tools for orchestrating distributed applications with docker • Docker Machine Tool that provides Docker Hosts and install the Docker Engine on them. • Docker Swarm Tool that clusters many Engines and schedules containers. • Docker Compose Tool to create and manage multi-container application.
Benefits of using Docker - Separation of Concerns Life becomes easier for System admin - Fast deployment cycle - Application portability Build in one environment, Ship anywhere. - Scalability Easy sign up new containers if needed. - Run more apps on host machine
Docker Networking • Containers can talk to each other without having to expose ports to host. • Essential for micro service application architecture. • Example: -Container with Tomcat running -Container with MySQL running -Application on tomcat needs to connect to MySQL
Quick Security Consideration • Docker demon needs to run as root. • Ensure that, only trusted can control Docker Demon. • If binding the demon to a TCP socket, secure it with TLS • Use linux hardening solutions - SELinux - GRSEC
Docker In Production - Private Registry - Docker Swarm - Docker Cloud - AWS ECS - Apache Mesos - Google Cloud - DC/OS
Introduction to container based virtualization with docker
Introduction to container based virtualization with docker

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Introduction to container based virtualization with docker

  • 1.
  • 2. About Me MD. Al-Amin Talukdar 3+ year experience in IT DevOps Engineer RHCSA, RHCE
  • 7. Container vs VM • Containers are more lightweight. • No need to install guest OS. • Less CPU, RAM, Storage needed. • More containers per machine than VM. • Greater Graterility.
  • 8. What is Docker? Docker is a platform for developing, shipping & running application using container based virtualization technology.
  • 10. Components of Docker • Docker File • Docker Images • Docker Engine • Docker Container • Docker Hub • Docker Machine • Docker Swam • Docker Compose • Kitematic
  • 11. Docker Image • A Docker image is a binary that includes all of the requirements for running a single Docker container, as well as metadata describing its needs and capabilities.
  • 12. Docker File • A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Using docker build users can create an automated build that executes several command-line instructions in succession. • Dockerfile is used for automation of work by specifying all step that we want on docker image.
  • 13. Docker Container • Images are read only containers used to create containers. • Built by you or other Docker Users. • Stored in docker hub or your local repository
  • 14. Docker Engine • Docker Engine is the program that enables containers to build shipped & run. • Docker Engine uses Linux Kernel namespace & control group. • Namespace gives us the isolated workspace.
  • 15. Installing Docker & Running Hello World Install docker with command # curl -sSL https://get.docker.com/ | sh Run the hello world container to test your installation # sudo docker run hello-world *Installation instruction areavailable at https://docs.docker.com/engine/installation/
  • 16. Registry & Repository • Where we store our image is known as registry • You can use your own registry or docker's public registry. Known as Docker Hub
  • 17. Docker Hub • Docker hub is the public registry that contains large amount of images available for your use. • Official Repositories are available at https://hub.docker.com/explore/
  • 18. Intro to Images 1. Go to https://hub.docker.com/ and sign up for an account. 2. Find your confirmation email and active your account. 3. Explore images from docker hub. 4. Understanding official Images, Tags 5. Search images on docker hub.
  • 19. Docker Orchestration Three tools for orchestrating distributed applications with docker • Docker Machine Tool that provides Docker Hosts and install the Docker Engine on them. • Docker Swarm Tool that clusters many Engines and schedules containers. • Docker Compose Tool to create and manage multi-container application.
  • 20. Benefits of using Docker - Separation of Concerns Life becomes easier for System admin - Fast deployment cycle - Application portability Build in one environment, Ship anywhere. - Scalability Easy sign up new containers if needed. - Run more apps on host machine
  • 21. Docker Networking • Containers can talk to each other without having to expose ports to host. • Essential for micro service application architecture. • Example: -Container with Tomcat running -Container with MySQL running -Application on tomcat needs to connect to MySQL
  • 22. Quick Security Consideration • Docker demon needs to run as root. • Ensure that, only trusted can control Docker Demon. • If binding the demon to a TCP socket, secure it with TLS • Use linux hardening solutions - SELinux - GRSEC
  • 23. Docker In Production - Private Registry - Docker Swarm - Docker Cloud - AWS ECS - Apache Mesos - Google Cloud - DC/OS