chrisleekr / docker-swarm-scalable-web-application-architecture

Docker Machine, Docker Swarm, Docker Registry, Docker Service, Docker Build

Docker 1.12 - Deploying Docker Services within Docker Swarm Mode and Docker Machine

This is proof-of-concept project to set up Docker Swarm in development environment with single command.

This project involves:

• Docker Machine
• Docker Swarm - Docker Built-in Orchestration
• Local Docker Registry
• Docker Network
• Docker Service

Note: This project is created for just practice. Not suitable for production use.

Prerequisites

• Docker 1.12.1+: https://www.docker.com/
• VirtualBox: https://www.virtualbox.org/

Usage

    $ git clone https://github.com/chrisleekr/docker-swarm-scalable-web-application-architecture.git
    $ cd docker-swarm-scalable-web-application-architecture
    $ ./run_swarm.sh

If run on windows, requires git shell https://git-for-windows.github.io/.

After shell script is completed, you can connect instances to:

• Visualizer UI: http://${MANAGER1_IP}:8500
• Web Access: http://${MANAGER1_IP}
• DB Access: tcp://${MANAGER1_IP}:3306

Note: Any node IP will be accessible to instances, not only manager1 node IP.

To stop all machines, run stop_swarm.sh

    $ ./stop_swarm.sh

Features

• Launch multiple Docker Machines and configure Docker Swarm automatically
• Demonstrate Docker Swarm which is introduced in Docker 1.12.1+
• Deploy local Docker Registry, which can use pull images across swarm nodes (https://hub.docker.com/_/registry/)
• Build docker image via Dockerfile in Docker Machine and push to local Docker Registry
• Create service with Docker Hub image MySQL (https://hub.docker.com/_/mysql/)
• Create service with custom build docker image (./docker-app-config/Dockerfile)
• Emulate scaling up for launched service

Screenshots

How it works

Note This section is a bit descriptive for reference purpose.

1. Launching docker machine manager1
   1. Remove existing docker machine manager1
   2. Create new docker machine manager1
   3. Stop newly created machine to add shared folder
   4. Add current folder as shared folder to docker machine
   5. Restart docker machine manager1
   6. Create new folder /docker into docker machine manager1
   7. Mount shared folder to /docker
2. Launching docker machine worker1
   1. Repeat aforementioned step #1-i to #1-vii
3. Launching docker machine worker2
   1. Repeat aforementioned step #1-i to #1-vii
4. Get lead manager manager1 host IP address
5. Initialize swarm in lead manager manager1
   1. Get swarm join token for manager node
   2. Construct swarm join command for manager node
   3. Run join command to join manager nodes
6. Join worker nodes to swarm
   1. Get swarm join token for worker node
   2. Construct swarm join command for worker node
   3. Run join command to join worker node worker1
   4. Run join command to join worker node worker2
7. Launch docker container manomarks/visualizer
8. Launch docker registry service registry:2
9. Build docker image for service web (Apache+PHP)
   1. Go to /docker/docker-app-config and build docker image docker-app-php
   2. Tag built docker image to localhost:5000/docker-app-php
   3. Push localhost:5000/docker-app-php to local docker registry
10. Create docker network frontend
11. Run MySQL service in docker machine manager1
    1. Clean MySQL data folder
    2. Create mysql service (single instance) for MySQL:5.7 to manager1 node
12. Run Apache & PHP docker-app-php service
    1. Create web service for docker image docker-app-php across swarm nodes
    2. Scale up web service to 4 instances