In this presentation, building principles of the modern development process were addressed, ways of improvement suggested, and benefits of virtualization and REST API usage demonstrated. This presentation by Mykhailo Brodskyi (Lead Software Engineer, Consultant at GlobalLogic, Kharkiv), was delivered at GlobalLogic Kharkiv Java Conference 2018 on June 10, 2018.

1. Development Process
Optimization Using
Docker
Mykhailo Brodskyi
Lead Software Engineer, Сonsultant

2. Agenda
1. Problem Overview
2. High-Level Architecture
3. Containerization vs Virtualization
4. Improved Development Process with Docker
5. Docker Security
6. RESTful API Standards
2

4. 4

5. High-Level Architecture

6. High-Level Architecture
6
- Hardware
- Software
- VirtualDevice
Configuration
Monitoring Device Data
Collector
DB
Devices
LOG
Web Application

7. Containerization vs Virtualization
7
Desktop Virtualization
Type 2 hypervisor = with
host OS
Hardware
MacOS/Win
VirtualBox
App 1
Solaris
App 2
Win
Server Virtualization
Hardware
OVM/VMWare ESX/XEN
App 1
Solaris
App 2
Linux
App 3
Win
Immutable Docker container
-> Isolation
Hardware
Linux+Docker
JDK JDK
Open
JDK
JDK
WebLogic WebLogic Tomcat Jython
app.war
ejb.jar
app.war x.py
tools
Type 1 hypervisor
[Oracle] http://www.oracle.com/technetwork/articles/cloudcomp/munz-docker-occs-3585210.html

8. 8
Development process BEFORE
3 – 4 weeks

9. 9
Development process AFTER
1 – 2 weeks

10. Configuration – Docker Compose 10
version: '3'
services:
db:
image: postgres:9.2
ports:
- "5432:5432"
environment:
- DEBUG=false
- POSTGRES_USER=
- POSTGRES_PASSWORD=
volumes:
- ./dbdata/init:/docker-entrypoint-initdb.d/
- ./dbdata/sql:/db
app:
build: ./app
restart: always
image: app:latest
ports:
- "8082:8080"
- "8000:8000"
depends_on:
- "db"
command: ["/wait-for-db.sh", "db", "--",
"/usr/local/tomcat/bin/catalina.sh", "run"]
proxy:
image: "haproxy:latest"
ports:
- '443:443'
- '80:80'
volumes:
- ./haproxy_conf:/usr/local/etc/haproxy
links:
- app
Continue
- Define and run multi-container applications
- Single command to manage all services
- Great for dev, staging, and CI

11. Java Base Image
- Openjdk Image
- Alpine Image
- Oracle Container Registry
container-registry.oracle.com
- Zulu-openjdk Image
11

12. Docker in the Cloud
12

13. Docker Security

14. Docker security
- Use only trusted users
- Add extra layer of security
- SELinux (Security-Enhanced Linux)
- Limit memory and CPU resources
- Sign your images
14

15. RESTful API Standards

16. RESTful Architectural Constraints
- Client-server architecture
- Stateless
- Cache constraints
- Uniform Interface
- Layered System
16
[R. Felding - https://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm, chapter 5]

17. Example 17
1. Must NOT have verbs in the
URLs
2. Must use plural rather than
singular nouns
3. Must keep URL simple and
intuitive
4. Must use HTTP operations
5. Must use concrete names rather
than abstract or group names
6. Must keep IDs (identifiers)
globally
7. Must avoid Using sequence
numbers for IDs

18. Thank you!
mykhailo.brodskyi@globallogic.com
Michael Brodskiy