System Architecture¶
System architecture describes how each component of the applications interact within the underlying system. This diagram details every service used and what technology developed under them.
Mobile Application¶
Application for the end user (medical facility / puskesmas) can monitor and manage the stock management on their facility.
Technology Front-end React Native
Website Application¶
Application for the head role (dinkes) of end users (medical facility / puskesmas) to monitor and distribute the supply chain of the inventory to medical facilities.
Technology Front-end React.js Framework Next.js
SSL / TLS¶
The communication between the front-end application with the backend application is encrypted through Secure Socket Layer (SSL) with HTTPS protocol.
Cloudflare WAF (Web Application Firewall)¶
The data sent to the backend application is filtered by cloudflare WAF for protection against DDos or other unauthorized attacks.
Kubernetes Cluster¶
Kubernetes is used for container orchestration for every service used in the applications.
Supply Chain Management (API)¶
Supply Chain Management API handles the process which includes but not limited to transactions in every medical facility, handling requests from mobile and website applications.
Technology Back-end Node.js Framework Express.js
Cold Chain Management (API)¶
Cold Chain Management API handles the process of requests from cold chain sensors through the API or other channels
Technology Back-end Node.js Framework Express.js
Logs (API)¶
Logs API is a service which handles every log needed by the system including but not limited to: system error log, debug log, informational log, etc.
Technology Back-end Node.js Framework Express.js
Queue (API)¶
Queue API is a service which handles queuing for system needs, including but not limited to: processing the requests from the cold chain, handling the queuing for notifications, etc.
Technology Back-end Node.js Framework Express.js Messaging Rabbit MQ
Notification (API)¶
Notification API is a service which handles notifications for every user, used for alarming the expected user about the inventory and cold chain sensors.
Technology Back-end Node.js Framework Express.js
MySQL (Database)¶
MySQL is used for databases as its capability to handle many transactions, and is good at OLAP/OLTP systems which have proof for its read speed capability.
Technology Database MySQL
Redis (Cache)¶
Redis is used for backend caching to fetch the data faster than querying a database.
Technology Database Redis
Rabbit MQ (Message Queuing)¶
Rabbit MQ is used for queuing messages used by queue service.
Technology Message Broker Rabbit MQ
Prometheus¶
Prometheus is used to gather data from the underlying operating system. It can be used to get the data to monitor the usage of the server.
Grafana¶
Grafana is used as a dashboard to monitor the usage of the server, which the data is supplied by prometheus.
Infrastructure¶
There are two managed infrastructure of SMILE application: Staging environment and Production environment. In Addition, production infrastructure is append to Disaster Recovery System.
Disaster Recovery System¶
Staging¶
Staging Infrastructure is managed in AWS services using EKS (Elastic Kubernetes Services) as the container orchestration which configured to handle large scale of requests using auto-scalable pattern horizontally and vertically. The database is configured on the managed service AWS RDS MySQL 8.0.
Production¶
Production Infrastructure is on premise server in Ministry of Health Data Center. Consist of 5 nodes of Openshift, and 5 nodes of VM databases configured with multi-master percona xtradb cluster.