- The document discusses using Docker for local development of microservices. It outlines some of the problems with traditional development workflows, such as long setup times and dependencies between services. - It proposes using Docker to package each microservice into a container image for local development. This allows developers to quickly setup a consistent environment with all dependencies and have full working environments on their computers. - Docker Compose is recommended to define and run multi-container applications locally. Individual services can be built from local code or pulled from a registry. This allows each developer to have their own isolated environments to develop and test microservices.

2. Local Dev Environment for
micro service with Docker
Julian Shen, LINE Taiwan

3. - Micro services
- What’s the problems
- Containers & Docker
- Solve the problems
Agenda

4. Micro services
API
Gateway
service 1rest
service 2rest
service 3rest
service 4rest
service 5rest
Web UI Database
message bus

5. What’s the problem?
I am only in charge of some services
Too many dependencies
Not easy to setup development env in minutes
Not easy test before commit codes
As a developer

6. Develop with an alpha Env
API
Gateway
service 1rest
service 2rest
service 3rest
service 4rest
service 5rest
Web UI Database
message bus
What you really care

7. What you might do
develop commit
deploy to
alpha
test with
other services
take long time
develop
test with with
mocked data
OR
commit deploy
not precise

8. You need full environment on your
computer

9. Ease to setup development env in minutes
Using Docker for development
Having a consistent env for testing at local
Ease to swap components

10. Using Docker for development
API
Gateway
service 1rest
service 2rest
service 3rest
service 4rest
service 5rest
Web UI Database
message bus
version 1container container
container
container
container
container container
container
container
branch a
branch b
local codes

11. Packing container image
docker file
app config
build
build script
image
source
get from git
git
deploy
registry

12. Packing container image for development
docker file
app config
build
build script
image
source
Linked using volume
local storage
mount volume
building codes
running app
booting container

13. Using Docker-compose to run all
version: 3
services:
service1:
build: .
depends_on:
- redis
ports:
- “80:80”
service2:
image: “service2:branch_a”
redis:
image: redis
service 1 service 2
Redis
docker-compose.yml
after running “docker-compose up”

14. Using smaller base images
Avoid installing unnecessary packages
One concern for one container
Tag version with git information for dev image
Tips

15. Thank you