Image-resizer: sample app

This project is a demo app used for Kubernetes and Docker Swarm deployment examples.

There isn't any Swarm or Kubernetes manifest in this repository, you'll need to create them. This project require Postgres, nats.io and Minio. You'll need to create deployments for those dependencies too. In the Helpful informations section, you will find docker commands to start Postgres, nats and Minio.

Project architecture:

Services configuration:

Frontend:

To build the frontend you first need to edit the .env.prod file. Then you can build the project by running yarn build.

Environment variables (at build time):

• VUE_APP_JOB_API: The Jobs-API url
• VUE_APP_IMAGES_API: The Images-API url

Docker image: alexandrevilain/image-resizer-frontend

This image needs to be rebuild with working env variables

Jobs-API:

The jobs-API is a REST API providing image upload endpoint to create a resize job. When you send an image on /upload its uploaded to minio and a job is sent to nats.io

Environment variables:

• API_PORT: The port to listen
• STORAGE_BUCKETNAME: The bucket's name to use and to create in minio
• STORAGE_SERVER: The minio's access url
• STORAGE_PORT: The minio's access port
• STORAGE_ACCESSKEY: The minio's access key
• STORAGE_SECRETKEY: The minio's secret key
• STORAGE_SSL: Define if minio is using SSL
• NATS_CONNECTIONSTRINGS: Nats.io connection url
• NATS_QUEUE: The name of the queue

Docker image: alexandrevilain/image-resizer-jobs-api

Worker:

The worker gets resize jobs from nats.io, resize the image, saves it to minio and store metadata on postgres.

Environment variables:

• NATS_SERVERS: The connection stringS to connect to nats.io
• NATS_QUEUE: The name of the queue
• POSTGRES_CONNECTION_STRING: Postgres connection url
• STORAGE_SERVER: The minio's access url (with port)
• STORAGE_PUBLIC_ENDPOINT: The minio's public url (For k8s, this is the ingress). Don't put the scheme at the beginning. It uses the STORAGE_SSL env var to know if it's https or http.
• STORAGE_BUCKETNAME: The bucket's name to use and to create in minio
• STORAGE_ACCESSKEY: The minio's access key
• STORAGE_SECRETKEY: The minio's secret key
• STORAGE_SSL: Define if minio is using SSL

Docker image: alexandrevilain/image-resizer-worker

Images-API:

The image-API is using PostgREST. It returns all resized images from PostgreSQL. The config file is in its dedicated folder.

Helpful informations:

To start Postgres using docker:

docker run --name images \
  -e POSTGRES_PASSWORD=supinfo \
  -e POSTGRES_USER=supinfo \
  -e POSTGRES_DB=images \
  -v $(pwd)/tables.sql:/docker-entrypoint-initdb.d/tables.sql \
  -p 5432:5432 \
  -d postgres

To start Nats.io using docker:

docker run --name gnatsd \
  -p 4222:4222 \
  -p 8222:8222 \
  -p 6222:6222 \
  -d nats:latest

To start minio using docker:

docker run --name minio \
  -e MINIO_ACCESS_KEY=supinfo \
  -e MINIO_SECRET_KEY=supinfo1234 \
  -p 9000:9000 \
  -v /tmp/minio:/data \
  -d minio/minio server /data

To start image-api using docker:

docker run --rm --link images:db -p 3000:3000 \
  -e PGRST_DB_URI="postgres://supinfo:supinfo@db:5432/images" \
  -e PGRST_DB_ANON_ROLE="web_anon" \
  -e PGRST_DB_SCHEMA="api" \
  -d postgrest/postgrest

Or you can use the file images-api/postgrest.conf.