Create monitor plugin

[shuse2]

Description

Create a plugin which provides utility endpoints and diagnostic information about the attached node.

Motivation

During our QA phase, or when we monitor the network, it often requires additional measurements to reveal the actual status of the attached node or network, therefore it is ideal for this information to be included as part of the lisk-sdk.

Additional Information

• Performance measurements should be done in-memory and not persisted
• The config should allow one webhook URL, and event to fire. If empty, emit all
• The port should be configurable
• It should allow whitelisting IPs, by default, localhost only

Route	Controller name
api/stats/blocks	blocks
api/stats/transactions	transactions
api/stats/network	network
api/stats/forks	forks
api/prometheus/metrics	metrics

Tasks

Sprint 30

• Create package for the monitor module and setup default configs Create package for the monitor plugin and setup default configs #5291

Sprint 31

• Create GET /api/stats/blocks propagation endpoint Create GET /api/stats/blocks propagation endpoint #5295
• GET /api/stats/transactions propagation endpoint GET /api/stats/transactions propagation endpoint #5884
• Create GET api/stats/network for Peer connection statistics Create GET api/stats/network for Peer connection statistics #5885
• Create GET (api/stats/forks) for forks events with block header Create GET (api/stats/forks) for forks events with block header #5886
• Create API endpoint for Prometheus (api/prometheus/metrics) Create API endpoint for Prometheus (api/prometheus/metrics) #5887
• Add shared state to Monitor Plugin Add shared state to Monitor Plugin #5898