Telemetry. Report "server.name" setting usage

[mshustov]

server.name has been introduced in #4335 and it was renamed once in #5587
Right now it serves the only purpose to populate kbn-name response header. It's not clear whether we should continue supporting the features. Before making a decision to remove it, we want to understand how often it's used by Kibana users.
Extend core_usage_collector to get information on whether server.name has been set in the config file explicitly

kibana/src/core/server/core_usage_data/core_usage_data_service.ts

Line 263 in dc1e1b1

http: {

Note that a default value is used if no value is set in the kibana.yml file

kibana/src/core/server/http/http_config.ts

Line 34 in b7acb1a

name: schema.string({ defaultValue: () => hostname() }),

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[pgayvallet]

@Bamieh isn't this info already accessible via the config usage data?

kibana/src/core/server/core_usage_data/core_usage_data_service.ts

Lines 507 to 509 in c766a2b

	getConfigsUsageData: async () => {
	return await this.getNonDefaultKibanaConfigs(exposedConfigsToUsage);
	},

kibana/src/core/server/core_usage_data/core_usage_data_service.ts

Lines 351 to 353 in c766a2b

	private async getNonDefaultKibanaConfigs(
	exposedConfigsToUsage: ExposedConfigsToUsage
	): Promise<ConfigUsageData> {

[Bamieh]

Indeed we do send telemetry for this setting (and all configs)

"kibana_config_usage": {
  "server.name": "[redacted]",
  "server.port": 5603,
  "server.basePath": "[redacted]",
  "server.rewriteBasePath": true,
  "elasticsearch.username": "[redacted]",
  "elasticsearch.password": "[redacted]",
  "plugins.paths": []
},

Note that it is reported as [redacted] by default since it is a string value. Which is the correct behavior for this case I believe

[pgayvallet]

Note that it is reported as [redacted] by default since it is a string value. Which is the correct behavior for this case I believe

We're only sending it when it's explicitly set by the user via the config, right?

[Bamieh]

@pgayvallet yes it is only sent if the user sets it (even if they set it manually to match the exact default value). I've used existing apis from core to do this

[afharo]

Should we close this issue?