[8.x](backport #40794) Add test for elasticsearch re-connection after network error & allow graceful shutdown #41454
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Proposed commit message
This commit reworks the
eslegclient.Connection
to accept a context in itsConnect
method, this allows the caller to cancel any in flight requests made by the connection by cancelling the context.The libbeat
outputs.Connectable
interface (used byoutputs.NetworkClient
) had to be updated to accept the context, which required refactoring in most of the outputs to also accept a context on connect.The worker from libbeat/publisher/pipeline/client_worker.go now uses a context for it's cancellation instead of a channel,
this context is also used when creating a connection to Elasticsearch.
An integration test is added to ensure the
ES output can always recover from network errors.
Checklist
[ ] I have made corresponding changes to the documentation[ ] I have made corresponding change to the default configuration filesCHANGELOG.next.asciidoc
orCHANGELOG-developer.next.asciidoc
.Disruptive User Impact
It's a bug fix, there is no disruptive user impact
## Author's ChecklistHow to test this PR locally
Related issues
## Use cases## Screenshots## LogsThis is an automatic backport of pull request #40794 done by [Mergify](https://mergify.com).