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What Is A Docker Container? | Docker Container Tutorial For Beginners| Docker Container |Simplilearn

Simplilearn
Simplilearn

The document discusses the concept and benefits of Docker containers as a solution for application development and deployment. It highlights how Docker simplifies the packaging of applications with their dependencies, allowing them to run consistently across different environments, as well as improving efficiency compared to traditional virtual machine setups. The document also covers the architecture of Docker, the process of creating containers, and key commands for managing them.

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What Is A Docker Container? | Docker Container Tutorial For Beginners| Docker Container |Simplilearn
Why Docker Container? Standard Machine Bins/Libs App A App CApp B Host OS Infrastructure
Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Standard Machine Virtual Machine Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure
Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure
Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Standard Machine
Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Application A works fine along with its dependency (Bins/Libs), but Application B and C will not work as it doesn’t have its dependencies
Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Guest OS occupies more space and leads to unstable performance
Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Docker Container 1 App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Unlike Virtual machine, Containers are efficient and are easily portable across different platforms
Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Hypervisor Docker Container 1 App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3
Why Docker Container? Docker Container 1 Docker Engine Host OS Infrastructure App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Docker Container 1 Docker Engine Host OS Infrastructure Docker Container 2 Docker Container 3 For example:
Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system Developer
Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system After the application is developed, it is examined by the testing team Here, the tester repeats the installation process of JBoss Developer Tester
Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system After the application is developed, it is examined by the testing team Here, the tester repeats the installation process of JBoss To host the Java application, the system admin also has to install JBoss on his system Developer Tester System admin Once the application is tested, it will be deployed by the production team
Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production Why is the same Jboss installation done thrice?? Why Docker Container?
Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different Why Docker Container?
Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production But this process consumes a lot time and effort. can there be an alternate way to this? due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different computers Why Docker Container?
Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production But this process consumes a lot time and effort. can there be an alternate way to this? due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different computers Why not try Docker Containers? Why Docker Container?
What’s in it for you?  What is Docker?  Architecture of Docker  What is a Docker Container?  How to create a Docker Container?  Benefits of Docker Containers  Basic Commands of Containers  Demo Let’s get started
What is Docker?
What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Docker Container
What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Build Developer Ship Docker Container Run Tester
What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Build Developer Ship Docker Container Run Tester Before starting with Docker containers, let’s understand the architecture of Docker
Architecture of Docker
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client Docker Daemon REST API Docker Engine
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands Docker Daemon checks the client request and communicates with the Docker components in order to perform a service
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands Docker Daemon checks the client request and communicates with the Docker components in order to perform a service A Docker Image is a file of instructions which is used to create Containers
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Container is a portable executable package which includes applications and their dependencies
Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Container is a portable executable package which includes applications and their dependencies Docker Registry is a service used for hosting and distributing Docker images among users
What is a Docker Container?
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Occupies less space Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Occupies less space Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure Occupies less space Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure PortableOccupies less space Docker Container
What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure Portable Short boot-up time Occupies less space Docker Container
How to create a Docker Container?
How to create a Docker Container? Docker File Docker Image Note: A Docker File is a text file which contains commands for building a Docker Image • Docker File creates a Docker Image using the build command
How to create a Docker Container? Docker File Docker Image Project code • Docker File creates a Docker Image using the build command • A Docker Image contains of all the project’s code
How to create a Docker Container? Docker File Docker Container Docker Image • Docker File creates a Docker Image using the build command • A Docker Image contains of all the project’s code • With Docker Image, a user can run the code in order to create Docker Containers Note: Command to run a Docker Container is Docker run <image-id>
How to create a Docker Container? Docker File Docker Container Docker Image Docker Registry • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name)
How to create a Docker Container? Docker File Docker Container Docker Image Docker Registry Docker Hub Repository • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name) • When a Docker Image is created, it gets stored in a Docker Hub or in a Repository
How to create a Docker Container? Docker File Docker Container Docker Image Note: Docker also has its own default Registry called Docker Hub Docker Registry Docker Hub Repository • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name) • When a Docker Image is created, it gets stored in a Docker Hub or in a Repository
How to create a Docker Container? Docker File Docker Container Docker Image Docker Hub Repository Docker Registry • There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) Note: In Docker Registry, repository is a collection of Docker Images
• There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) • Once a Docker Image is retrieved from the Docker Registry, a user can build new Containers How to create a Docker Container? Docker File Docker Container Docker Image Container Container Docker Registry
• There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) • Once a Docker Image is retrieved from the Docker Registry, a user can get the Docker Image and build new Containers How to create a Docker Container? Docker File Docker Container Docker Image Container Container Docker Registry Now, Let’s create a Container using basic Docker commands
How to create a Docker Container? Docker Daemon Docker Registry REST API Image Docker Host Note: Docker uses Docker images to run your code, not the Dockerfile build push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command Docker Client Build Push Pull Run
How to create a Docker Container? When you run pull command, Docker Image (NGNIX) is retrieved from the registry Docker Daemon Docker Registry REST API pull Image Image Docker Host Docker Client Build Push Pull Run push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command build
How to create a Docker Container? Finally, a single Container (NGNIX) is built using Docker Image through the run command Docker Daemon Docker Registry REST API pull Image ImageContainer run Docker Client Docker Host Build Push Pull Run push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command When you run pull command, Docker Image (NGNIX) is retrieved from the registry build
How to create a Docker Container? DID YOU KNOW? • When a Container is created, a new layer is formed on top of the Docker Image layers called Container layer • Each Container has a separate (R/W) Container layer and any changes made in a Docker Container is reflected upon the particular Container layer • In case a Container is deleted, the Container layer also gets deleted Note: Docker Image has multiple image layers and each Image layer is created by executing each command in the Dockerfile
Benefits of Containers
Benefits of Containers Containers have no external dependency for applications to run
Benefits of Containers Container Containers have no external dependency for applications to run As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems
Benefits of Containers Containers have no external dependency for applications to run Data volumes can be shared and reused among multiple ContainersContainer As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems
Benefits of Containers Data volumes can be shared and reused among multiple Containers As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems Container Containers run applications in isolation and also share the OS kernel with other Containers os Containers have no external dependency for applications to run
Is it possible to run multiple Containers together without the need to start each one individually?Well, it’s possible with Docker compose !
Docker Compose Docker Compose can be used to run multiple Containers in a single service For example Consider an instance where you have an application which requires Apache Tomcat and redis. Now, you can easily create one Docker Compose file to run both Containers in a single service Docker Compose file
Basic Docker Container commands
Basic Docker Container commands Basic commands for Docker • Docker Container commit • Docker Container cp • Docker Container prune • Docker Container kill • Docker Container exec • Docker Container ls • Docker Container rm • Docker Container restart - Command to create a new Docker image from the changes made in Container - Command to copy files between the local filesystem and a Docker Container - Command to remove all stopped Containers - Command to terminate one or more running Containers - Command to run a new command in a running Container - Command to list Docker Containers - Command to remove one or more Containers - Command to restart one or more Containers
Other fields that use Blockchain Blockchain has been used in other industries as well. Some examples of this are: To ease the verification of documents To stop music piracy and to compensate artists for purchased songs Data integrity can be guaranteed. There cannot be a single point of failure Verification of identity of employee, history, etc. Payment and benefit process validation Travel Music Cybersecurity Human Resources

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What Is A Docker Container? | Docker Container Tutorial For Beginners| Docker Container |Simplilearn

  • 2. Why Docker Container? Standard Machine Bins/Libs App A App CApp B Host OS Infrastructure
  • 3. Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Standard Machine Virtual Machine Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure
  • 4. Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure
  • 5. Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Standard Machine
  • 6. Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Application A works fine along with its dependency (Bins/Libs), but Application B and C will not work as it doesn’t have its dependencies
  • 7. Why Docker Container? Docker Container 1 App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Guest OS occupies more space and leads to unstable performance
  • 8. Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Docker Container 1 App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Note: Unlike Virtual machine, Containers are efficient and are easily portable across different platforms
  • 9. Why Docker Container? App A Bins/Libs App B Bins/Libs Guest OS Guest OS Virtual Machine 1 Virtual Machine 2 Virtual Machine 3 Bins/LibsBins/Libs Guest OS App B Bins/Libs Guest OS Bins/Libs Standard Machine Virtual Machine Docker Container Docker Engine Host OS Infrastructure Hypervisor Host OS Infrastructure Bins/Libs App A App CApp B Host OS Infrastructure Hypervisor Docker Container 1 App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3
  • 10. Why Docker Container? Docker Container 1 Docker Engine Host OS Infrastructure App A Bins/Libs App C Bins/Libs App B Bins/Libs Docker Container 2 Docker Container 3 Docker Container 1 Docker Engine Host OS Infrastructure Docker Container 2 Docker Container 3 For example:
  • 11. Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system Developer
  • 12. Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system After the application is developed, it is examined by the testing team Here, the tester repeats the installation process of JBoss Developer Tester
  • 13. Let’s take an example where a company develops a Java Application Why Docker Container? A developer will setup a JBoss software on his system After the application is developed, it is examined by the testing team Here, the tester repeats the installation process of JBoss To host the Java application, the system admin also has to install JBoss on his system Developer Tester System admin Once the application is tested, it will be deployed by the production team
  • 14. Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production Why is the same Jboss installation done thrice?? Why Docker Container?
  • 15. Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different Why Docker Container?
  • 16. Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production But this process consumes a lot time and effort. can there be an alternate way to this? due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different computers Why Docker Container?
  • 17. Let’s take an example, where a company develops a Java Application In order to do so a software programmer will setup an JBoss server on his system After the application is developed it has to be tested by the testing team For which the tester will have to repeat the set up process of JBoss in order to test the application As soon the testing is finished, it will be deployed to the production team Once again the production team requires an environment with JBoss installed on their system, so that it can host the Java application Developer Tester Production But this process consumes a lot time and effort. can there be an alternate way to this? due to the difference in computer environments, Jboss doesn’t work on the other systems, so installation is done separately on three different computers Why not try Docker Containers? Why Docker Container?
  • 18. What’s in it for you?  What is Docker?  Architecture of Docker  What is a Docker Container?  How to create a Docker Container?  Benefits of Docker Containers  Basic Commands of Containers  Demo Let’s get started
  • 20. What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Docker Container
  • 21. What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Build Developer Ship Docker Container Run Tester
  • 22. What is Docker? Docker is an open source platform that helps a user to package an application and it’s dependencies into a Docker Container for the development and deployment of software Build Developer Ship Docker Container Run Tester Before starting with Docker containers, let’s understand the architecture of Docker
  • 24. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client Docker Daemon REST API Docker Engine
  • 25. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands
  • 26. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands Docker Daemon checks the client request and communicates with the Docker components in order to perform a service
  • 27. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Client is a service which uses REST API to send commands to Docker Daemon through CLI commands Docker Daemon checks the client request and communicates with the Docker components in order to perform a service A Docker Image is a file of instructions which is used to create Containers
  • 28. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Container is a portable executable package which includes applications and their dependencies
  • 29. Architecture of Docker Docker Client Docker Host Docker Daemon Docker Registry ImagesContainer Container REST API Docker Container is a portable executable package which includes applications and their dependencies Docker Registry is a service used for hosting and distributing Docker images among users
  • 30. What is a Docker Container?
  • 31. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Docker Container
  • 32. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Docker Container
  • 33. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Occupies less space Docker Container
  • 34. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Occupies less space Docker Container
  • 35. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure Occupies less space Docker Container
  • 36. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure PortableOccupies less space Docker Container
  • 37. What is a Docker Container? • Docker Container is an executable software package that includes all dependencies (frameworks, libraries, etc.) required to execute an application • With Docker Containers, applications can work efficiently in different computer environments Applications run in isolation Lightweight Secure Portable Short boot-up time Occupies less space Docker Container
  • 38. How to create a Docker Container?
  • 39. How to create a Docker Container? Docker File Docker Image Note: A Docker File is a text file which contains commands for building a Docker Image • Docker File creates a Docker Image using the build command
  • 40. How to create a Docker Container? Docker File Docker Image Project code • Docker File creates a Docker Image using the build command • A Docker Image contains of all the project’s code
  • 41. How to create a Docker Container? Docker File Docker Container Docker Image • Docker File creates a Docker Image using the build command • A Docker Image contains of all the project’s code • With Docker Image, a user can run the code in order to create Docker Containers Note: Command to run a Docker Container is Docker run <image-id>
  • 42. How to create a Docker Container? Docker File Docker Container Docker Image Docker Registry • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name)
  • 43. How to create a Docker Container? Docker File Docker Container Docker Image Docker Registry Docker Hub Repository • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name) • When a Docker Image is created, it gets stored in a Docker Hub or in a Repository
  • 44. How to create a Docker Container? Docker File Docker Container Docker Image Note: Docker also has its own default Registry called Docker Hub Docker Registry Docker Hub Repository • Once the Docker Image is created, it can be stored in the Docker Registry using Docker push command (Docker push image_name) • When a Docker Image is created, it gets stored in a Docker Hub or in a Repository
  • 45. How to create a Docker Container? Docker File Docker Container Docker Image Docker Hub Repository Docker Registry • There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) Note: In Docker Registry, repository is a collection of Docker Images
  • 46. • There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) • Once a Docker Image is retrieved from the Docker Registry, a user can build new Containers How to create a Docker Container? Docker File Docker Container Docker Image Container Container Docker Registry
  • 47. • There are multiple Docker images available in the registry and all can be retrieved through the Docker pull command (e.g. Docker pull image_name) • Once a Docker Image is retrieved from the Docker Registry, a user can get the Docker Image and build new Containers How to create a Docker Container? Docker File Docker Container Docker Image Container Container Docker Registry Now, Let’s create a Container using basic Docker commands
  • 48. How to create a Docker Container? Docker Daemon Docker Registry REST API Image Docker Host Note: Docker uses Docker images to run your code, not the Dockerfile build push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command Docker Client Build Push Pull Run
  • 49. How to create a Docker Container? When you run pull command, Docker Image (NGNIX) is retrieved from the registry Docker Daemon Docker Registry REST API pull Image Image Docker Host Docker Client Build Push Pull Run push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command build
  • 50. How to create a Docker Container? Finally, a single Container (NGNIX) is built using Docker Image through the run command Docker Daemon Docker Registry REST API pull Image ImageContainer run Docker Client Docker Host Build Push Pull Run push In Docker, a Dockerfile is used to build the image using build command and that image is stored into the registry using push command When you run pull command, Docker Image (NGNIX) is retrieved from the registry build
  • 51. How to create a Docker Container? DID YOU KNOW? • When a Container is created, a new layer is formed on top of the Docker Image layers called Container layer • Each Container has a separate (R/W) Container layer and any changes made in a Docker Container is reflected upon the particular Container layer • In case a Container is deleted, the Container layer also gets deleted Note: Docker Image has multiple image layers and each Image layer is created by executing each command in the Dockerfile
  • 53. Benefits of Containers Containers have no external dependency for applications to run
  • 54. Benefits of Containers Container Containers have no external dependency for applications to run As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems
  • 55. Benefits of Containers Containers have no external dependency for applications to run Data volumes can be shared and reused among multiple ContainersContainer As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems
  • 56. Benefits of Containers Data volumes can be shared and reused among multiple Containers As Containers are light-weight, they are easily shipped (deployed) to other computers and get executed on other computer environments regardless of their host operating systems Container Containers run applications in isolation and also share the OS kernel with other Containers os Containers have no external dependency for applications to run
  • 57. Is it possible to run multiple Containers together without the need to start each one individually?Well, it’s possible with Docker compose !
  • 58. Docker Compose Docker Compose can be used to run multiple Containers in a single service For example Consider an instance where you have an application which requires Apache Tomcat and redis. Now, you can easily create one Docker Compose file to run both Containers in a single service Docker Compose file
  • 60. Basic Docker Container commands Basic commands for Docker • Docker Container commit • Docker Container cp • Docker Container prune • Docker Container kill • Docker Container exec • Docker Container ls • Docker Container rm • Docker Container restart - Command to create a new Docker image from the changes made in Container - Command to copy files between the local filesystem and a Docker Container - Command to remove all stopped Containers - Command to terminate one or more running Containers - Command to run a new command in a running Container - Command to list Docker Containers - Command to remove one or more Containers - Command to restart one or more Containers
  • 61. Other fields that use Blockchain Blockchain has been used in other industries as well. Some examples of this are: To ease the verification of documents To stop music piracy and to compensate artists for purchased songs Data integrity can be guaranteed. There cannot be a single point of failure Verification of identity of employee, history, etc. Payment and benefit process validation Travel Music Cybersecurity Human Resources

Editor's Notes

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  • #6: application ‘A’ works fine along with its dependency (bin/lib),
  • #7: application ‘A’ works fine along with its dependency (bin/lib), But Application B and C will not work as it doesn’t have its dependencies
  • #10: Docker Containers are lightweight (occupies less space) because docker engines do not require an extra layer of a hypervisor and runs directly on the host operating system
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