Docker is a container platform that allows developers to easily deploy applications. It allows building, shipping and running distributed applications without costly rewrites whether using microservices or traditional apps. Docker simplifies software delivery using containers that package code and dependencies together, ensuring apps work seamlessly in any computing environment. Docker Compose and Docker Swarm allow defining and running multi-container apps across multiple hosts, providing clustering, orchestration and service discovery capabilities.

1. What is
Data Driven Product?Docker and Orchestration
A.Akkus

2. Agenda
1. What is the Docker?
2. Docker CLI & Docker HTTP API
3. Docker Machine
4. Docker Compose
5. Docker Swarm
6. Docker for Development Env.
7. Demo

3. What is the Docker?
• Docker is the world’s leading software container platform.
• Docker simplifies software delivery by making it easy to build, ship, and run distributed
applications.
• Eliminate the “it works on my machine” problem once and for all.
• Deploy both microservices and traditional apps anywhere without costly rewrites.
• From one to thousands of containers without breaking a sweat.
• Secure by default.

4. What is the
Docker?

6. Dockerfile
FROM java:8
VOLUME /tmp
ADD target/challenge-0.0.1-SNAPSHOT.jar challenge.jar
RUN bash -c 'touch /challenge.jar’
EXPOSE 8080
ENTRYPOINT ["java","-jar","/challenge.jar"]

7. Best practices for writing Dockerfiles
• Containers should be ephemeral
• Use a .dockerignore file
• Avoid installing unnecessary packages
• Each container should have only one concern
• Minimize the number of layers
• Sort multi-line arguments
• Use the multi-stage build

8. Docker CLI
• To list available commands, either run docker with no parameters or execute docker help.
$ docker
Usage: docker [OPTIONS] COMMAND [ARG...] docker [ --help | -v | --version ]
A self-sufficient runtime for containers.
…….
• Quick demo.

9. Docker HTTP API
• By default, a unix domain socket (or IPC socket) is created at /var/run/docker.sock
• If you need to access the Docker daemon remotely, you need to enable the tcp Socket.
• You can do following items;
* Run a container
* Update a container
* List and manage containers
* Print the logs of a specific container
* Pull images
* List a network
…..
….

10. Docker Machine
• Docker Machine allows you to create Docker hosts on your
computer, on cloud providers, and inside your own data center.
• It creates servers, installs Docker on them, and then configures
the Docker client to talk to them.
• Common commands for Docker Machine;
* create, ls, ssh, scp, inspect, env, start/stop/kill, rm, ip

11. Docker Compose
• Docker Compose is a tool that allows you to define and run
applications with one or more Docker containers.
• Typically, an application would consist of multiple containers such as
one for the web server, another for the application server, and
another one for the database.
• With Compose, a multi-container application can be easily defined
in a single file.
• All the containers required for the application can be then started
and managed with a single command.
For example; docker-compose up or docker-compose up -d

12. Docker Compose
• The Docker Compose file is typically called
docker-compose.yml.
• If you decide to use a different filename, it
can be specified using the - f option to
docker-compose script.

13. iyzicontainer

14. iyzicontainer

15. Docker Swarm
• The cluster management and orchestration features embedded in the Docker Engine are built using SwarmKit.
• You enable swarm mode for an engine by either initializing a swarm or joining an existing swarm.
• Declarative service model.
• Scaling.
• Desired state reconciliation.
• Multi-host networking.
• Service discovery.
• Load balancing.
• Secure by default.
• Rolling updates.
• Configurable Updates.

16. Docker Swarm

17. Docker Swarm - Raft
• When the Docker Engine runs in swarm mode, manager nodes implement the Raft
Consensus Algorithm to manage the global cluster state.
• Raft tolerates up to (N-1)/2 failures and requires a majority or quorum
of (N/2)+1 members to agree on values proposed to the cluster.
• The implementation of the consensus algorithm in swarm mode means it features the
properties inherent to distributed systems;
• agreement on values in a fault tolerant system.
• mutual exclusion through the leader election process
• cluster membership management
• globally consistent object sequencing and CAS (compare-and-swap) primitives

18. Docker for Development Environment
• Docker containers wrap up a piece of software in a complete filesystem that
contains everything it needs to run: code, runtime, system tools, system libraries —
anything you can install on a server. This guarantees that it will always execute the
same, regardless of the environment it is running in.
• docker-compose up –d
./run-test.sh
docker-compose down

19. Demo
• A sample app that uses a Java Spring Boot backend connected to a database to
display a fictitious art shop with a React front-end.
• We’ve 3 swarm nodes(one manager and two worker)
https://github.com/AlicanAkkus/atsea-sample-shop-app

20. Links
• Docker;
• https://docs.docker.com/get-started/
• https://alicanakkus.github.io/blog/docker/docker-introduction
• https://alicanakkus.github.io/blog/docker/docker-images
• https://alicanakkus.github.io/blog/docker/docker-containers
• https://alicanakkus.github.io/blog/docker/springboot-for-docker
• https://alicanakkus.github.io/blog/docker/docker-network
• https://alicanakkus.github.io/blog/docker/docker-volume
• https://alicanakkus.github.io/blog/docker/docker-compose-en
• Docker hub;
• https://hub.docker.com
• Raft;
• http://thesecretlivesofdata.com/raft/

21. Thanks