[Feat]: Enhance the Metrics search capability

[sashwathn]

Problem

Our customers struggle to search / filter the charts that are relevant to them based on:

• Contexts
• Services (chart labels)
• Dimensions
• etc.

Description

We need the metrics search on the UI to utilise the capabilities available on the Netdata Agent to provide more context to the search and the queries..

• Provide the list of contexts available based on the search
• Provide the list of chart labels / values available based on the search
• Provide the dimensions available based on the search

The user can then choose the actual thing they want to search for and result in the relevant set of charts on the metrics explorer. Example use-cases:

• Show all the charts with respect to a specific app-group
• Show all charts with respect to bandwidth as a dimension
• Show all charts that have utilisation in the context name
• Show all charts for postgres on the database X.

@ralphm @ktsaou please add more details to this request to @novykh from FE and @papazach and the BE team can evaluate how this can be implemented.

Importance

must have

Value proposition

1. Helps users easily focus on what is relevant to them.
2. Helps users group a set of charts with respect to a chart label (service etc)
3. Prevents users from creating custom dashboards without the need for it
4. Optimize the data queries made to the agent.

Proposed implementation

No response

[novykh]

@ktsaou can the agent maybe provide facets for the contexts based on the above search criteria and maybe more? This will be the most efficient way to do that.