[[stability]]
== Stability

Ensure your feature will work under all possible {kib} scenarios.

[discrete]
=== Environmental configuration scenarios

* Cloud
** Does the feature work on *cloud environment*?
** Does it create a setting that needs to be exposed, or configured
differently than the default, on Cloud? (whitelisting of certain
settings/users? Ref:
https://www.elastic.co/guide/en/cloud/current/ec-add-user-settings.html
,
https://www.elastic.co/guide/en/cloud/current/ec-manage-kibana-settings.html)
** Is there a significant performance impact that may affect Cloud
{kib} instances?
** Does it need to be aware of running in a container? (for example
monitoring)
* Multiple {kib} instances
** Pointing to the same index
** Pointing to different indexes
*** Should make sure that the {kib} index is not hardcoded anywhere.
*** Should not be storing a bunch of stuff in {kib} memory.
*** Should emulate a high availability deployment.
*** Anticipating different timing related issues due to shared resource
access.
*** We need to make sure security is set up in a specific way for
non-standard {kib} indices. (create their own custom roles)
* {kib} running behind a reverse proxy or load balancer, without sticky
sessions. (we have had many discuss/SDH tickets around this)
* If a proxy/loadbalancer is running between ES and {kib}

[discrete]
=== Kibana.yml settings

* Using a custom {kib} index alias
* When optional dependencies are disabled
** Ensure all your required dependencies are listed in kibana.json
dependency list!

[discrete]
=== Test coverage

* Does the feature have sufficient unit test coverage? (does it handle
storeinSessions?)
* Does the feature have sufficient Functional UI test coverage?
* Does the feature have sufficient Rest API coverage test coverage?
* Does the feature have sufficient Integration test coverage?

[discrete]
=== Browser coverage

Refer to the list of browsers and OS {kib} supports
https://www.elastic.co/support/matrix

Does the feature work efficiently on the list of supported browsers? 

[discrete]
=== Upgrade Scenarios - Migration scenarios- 

Does the feature affect old
indices, saved objects ? - Has the feature been tested with {kib}
aliases - Read/Write privileges of the indices before and after the
upgrade?