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* rename float to discrete
* use same section title level on all source files
* Elasticsearch => {es}
Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
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[[kibana-debugging]]
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== Debugging {kib}
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For information about how to debug unit tests, refer to <<debugging-unit-tests>>.
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[discrete]
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=== Server Code
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`yarn debug` will start the server with Node's inspect flag. {kib}'s development mode will start three processes on ports `9229`, `9230`, and `9231`. Chrome's developer tools need to be configured to connect to all three connections. Add `localhost:<port>` for each {kib} process in Chrome's developer tools connection tab.
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[discrete]
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=== Instrumenting with Elastic APM
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{kib} ships with the
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https://github.com/elastic/apm-agent-nodejs[Elastic APM Node.js Agent]
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built-in for debugging purposes.
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Its default configuration is meant to be used by core {kib} developers
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only, but it can easily be re-configured to your needs. In its default
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configuration it’s disabled and will, once enabled, send APM data to a
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centrally managed {es} cluster accessible only to Elastic
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employees.
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To change the location where data is sent, use the
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https://www.elastic.co/guide/en/apm/agent/nodejs/current/configuration.html#server-url[`serverUrl`]
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APM config option. To activate the APM agent, use the
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https://www.elastic.co/guide/en/apm/agent/nodejs/current/configuration.html#active[`active`]
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APM config option.
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All config options can be set either via environment variables, or by
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creating an appropriate config file under `config/apm.dev.js`. For
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more information about configuring the APM agent, please refer to
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https://www.elastic.co/guide/en/apm/agent/nodejs/current/configuring-the-agent.html[the
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documentation].
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Example `config/apm.dev.js` file:
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[source,js]
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----
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module.exports = {
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active: true,
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};
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----
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APM
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https://www.elastic.co/guide/en/apm/agent/rum-js/current/index.html[Real
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User Monitoring agent] is not available in the {kib} distributables,
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however the agent can be enabled by setting `ELASTIC_APM_ACTIVE` to
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`true`. flags
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....
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ELASTIC_APM_ACTIVE=true yarn start
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// activates both Node.js and RUM agent
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....
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Once the agent is active, it will trace all incoming HTTP requests to
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{kib}, monitor for errors, and collect process-level metrics. The
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collected data will be sent to the APM Server and is viewable in the APM
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UI in {kib}. |