#Image digest

img_digest is the service in charge of resizing and beautifying our images.

The worker

Service worker consumes from the Rabbitmq queue img_digest.prod.q.resizer This worker pics images from our temporary file storage MongoDB GridFS And depending on position and applauses, It builds our different images, storing them in AWS S3

Environment vars

All the env vars this service reads:

NODE_ENV=development
DEBUG=*
RABBITMQ_VIRTUALHOST=/wetopi
RABBITMQ_USER
RABBITMQ_PASS
RABBITMQ_ENV_RABBITMQ_NODENAME=172.17.0.169
RABBITMQ_PORT_5672_TCP_PORT=5672
MONGODB_PORT=mongodb://172.17.0.168:27017/wetopi
AWS_S3_BUCKET=mybucket
AWS_S3_ENDPOINT=mybucket.s3-website-eu-west-1.amazonaws.com
AWS_ACCESS_KEY_ID=AAAAAAAAA
AWS_SECRET_ACCESS_KEY=XXXXXXXX/XXXX/XXXXXXXXX
AWS_DEFAULT_REGION=eu-west-1

Run worker with docker command line

assuming we have MongoDB and rabbitMQ containers running as:

• api_rabbitmq_1
• api_mongodb_1

docker run -d --name img_digest \
           -e NODE_ENV=development \
           -e RABBITMQ_VIRTUALHOST=/wetopi \
           -e RABBITMQ_USER \
           -e RABBITMQ_PASS \
           -e MONGODB_PORT=mongodb://mongodb:27017/wetopi \
           -e AWS_S3_BUCKET \
           -e AWS_S3_ENDPOINT \
           -e AWS_ACCESS_KEY_ID \
           -e AWS_SECRET_ACCESS_KEY \
           -e AWS_DEFAULT_REGION \
           -e 'DEBUG=*' \
           --link api_rabbitmq_1:rabbitmq \
           --link api_mongodb_1:mongodb \
           -v /home/wetopi/img_digest:/usr/src/app \
           wetopi/node \
           forever --watchDirectory=/usr/src/app -w -m 3 ./worker.js

Run worker with fig

Fig does not let us to link containers from other fig.yml external files. Just in case, edit fig.yml in oder to update external container IP's

fig up -d

IMPORTANT: this fig.yml does not build a docker image. This is for local development. img_digest uses the npm module lwip. This module needs code targetting the machine that runs it. If lwip echoes 'no suitable image found.', then delete node_modules/lwip and perform npm install in you container.