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# Netdata Cloud On-Prem
Netdata Cloud is built as microservices and is orchestrated by a Kubernetes cluster, providing a highly available and auto-scaled observability platform.
The overall architecture looks like this:
```mermaid
flowchart TD
agents("🌍 <b>Netdata Agents</b><br/>Users' infrastructure<br/>Netdata Children & Parents")
users[["🔥 <b>Unified Dashboards</b><br/>Integrated Infrastructure<br/>Dashboards"]]
ingress("🛡️ <b>Ingress Gateway</b><br/>TLS termination")
traefik((("🔒 <b>Traefik</b><br/>Authentication &<br/>Authorization")))
emqx(("📤 <b>EMQX</b><br/>Agents Communication<br/>Message Bus<br/>MQTT"))
pulsar(("⚡ <b>Pulsar</b><br/>Internal Microservices<br/>Message Bus"))
frontend("🌐 <b>Front-End</b><br/>Static Web Files")
auth("👨💼 <b>Users & Agents</b><br/>Authorization<br/>Microservices")
spaceroom("🏡 <b>Spaces, Rooms,<br/>Nodes, Settings</b><br/>Microservices for<br/>managing Spaces,<br/>Rooms, Nodes and<br/>related settings")
charts("📈 <b>Metrics & Queries</b><br/>Microservices for<br/>dispatching queries<br/>to Netdata agents")
alerts("🔔 <b>Alerts & Notifications</b><br/>Microservices for<br/>tracking alert<br/>transitions and<br/>deduplicating alerts")
sql[("✨ <b>PostgreSQL</b><br/>Users, Spaces, Rooms,<br/>Agents, Nodes, Metric<br/>Names, Metrics Retention,<br/>Custom Dashboards,<br/>Settings")]
redis[("🗒️ <b>Redis</b><br/>Caches needed<br/>by Microservices")]
elk[("🗞️ <b>Elasticsearch</b><br/>Feed Events Database")]
bridges("🤝 <b>Input & Output</b><br/>Microservices bridging<br/>agents to internal<br/>components")
notifications("📢 <b>Notifications Integrations</b><br/>Dispatch alert<br/>notifications to<br/>3rd party services")
feed("📝 <b>Feed & Events</b><br/>Microservices for<br/>managing the events feed")
users --> ingress
agents --> ingress
ingress --> traefik
traefik ==>|agents<br/>websockets| emqx
traefik -.- auth
traefik ==>|http| spaceroom
traefik ==>|http| frontend
traefik ==>|http| charts
traefik ==>|http| alerts
spaceroom o-...-o pulsar
spaceroom -.- redis
spaceroom x-..-x sql
spaceroom -.-> feed
charts o-.-o pulsar
charts -.- redis
charts x-.-x sql
charts -..-> feed
alerts o-.-o pulsar
alerts -.- redis
alerts x-.-x sql
alerts -..-> feed
auth o-.-o pulsar
auth -.- redis
auth x-.-x sql
auth -.-> feed
feed <--> elk
alerts ----> notifications
%% auth ~~~ spaceroom
emqx <.-> bridges o-..-o pulsar
```
## Requirements
The following components are required to run Netdata Cloud On-Prem:
- **Kubernetes cluster** version 1.23+
- **Kubernetes metrics server** (for autoscaling)
- **TLS certificate** for secure connections. A single endpoint is required but there is an option to split the frontend, api, and MQTT endpoints. The certificate must be trusted by all entities connecting to it.
- Default **storage class configured and working** (persistent volumes based on SSDs are preferred)
The following 3rd party components are used, which can be pulled with the `netdata-cloud-dependency` package we provide:
- **Ingress controller** supporting HTTPS
- **PostgreSQL** version 13.7 (main database for all metadata Netdata Cloud maintains)
- **EMQX** version 5.11 (MQTT Broker that allows Agents to send messages to the On-Prem Cloud)
- **Apache Pulsar** version 2.10+ (message broken for inter-container communication)
- **Traefik** version 2.7.x (internal API Gateway)
- **Elasticsearch** version 8.8.x (stores the feed of events)
- **Redis** version 6.2 (caching)
- imagePullSecret (our ECR repos are secured)
Keep in mind though that the pulled versions are not configured properly for production use. Customers of Netdata Cloud On-Prem are expected to configure these applications according to their needs and policies for production use. Netdata Cloud On-Prem can be configured to use all these applications as a shared resource from other existing production installations.
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