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Gian Merlino 986a271a7d
Merge core CoordinatorClient with MSQ CoordinatorServiceClient. (#14652) 
* Merge core CoordinatorClient with MSQ CoordinatorServiceClient.

Continuing the work from #12696, this patch merges the MSQ
CoordinatorServiceClient into the core CoordinatorClient, yielding a single
interface that serves both needs and is based on the ServiceClient RPC
system rather than DruidLeaderClient.

Also removes the backwards-compatibility code for the handoff API in
CoordinatorBasedSegmentHandoffNotifier, because the new API was added
in 0.14.0. That's long enough ago that we don't need backwards
compatibility for rolling updates.

* Fixups.

* Trigger GHA.

* Remove unnecessary retrying in DruidInputSource. Add "about an hour"
retry policy and h

* EasyMock
 		2023-07-27 13:23:37 -07:00
..
cases Prepare master branch for next release, 28.0.0 (#14595) 2023-07-18 09:22:30 +05:30
docs Extend the IT framework to allow tests in extensions (#13877) 2023-05-15 20:29:51 +05:30
image Prepare master branch for next release, 28.0.0 (#14595) 2023-07-18 09:22:30 +05:30
tools Merge core CoordinatorClient with MSQ CoordinatorServiceClient. (#14652) 2023-07-27 13:23:37 -07:00
.gitignore Docker build for the revised ITs (#12707) 2022-08-10 14:17:33 +05:30
README.md Code cleanup & message improvements (#13778) 2023-02-15 15:22:54 +05:30

README.md

Revised Integration Tests

This directory builds a Docker image for Druid, then uses that image, along with test configuration to run tests. This version greatly evolves the integration tests from the earlier form. See the History section for details.

Shortcuts

List of the most common commands once you're familiar with the framework. If you are new to the framework, see Quickstart for an explanation.

Build Druid

./it.sh build

Build the Test Image

./it.sh image

Run an IT from the Command Line

./it.sh test <category>

Where <category> is one of the test categories.

Run an IT from the IDE

Start the cluster:

./it.sh up <category>

Where <category> is one of the test categories. Then launch the test as a JUnit test.

Contents

Background information

Goals

The goal of the present version is to simplify development.

  • Speed up the Druid test image build by avoiding download of dependencies. (Instead, any such dependencies are managed by Maven and reside in the local build cache.)
  • Use official images for dependencies to avoid the need to download, install, and manage those dependencies.
  • Make it is easy to manually build the image, launch a cluster, and run a test against the cluster.
  • Convert tests to JUnit so that they will easily run in your favorite IDE, just like other Druid tests.
  • Use the actual Druid build from distribution so we know what is tested.
  • Leverage, don't fight, Maven.
  • Run the integration tests easily on a typical development machine.

By meeting these goals, you can quickly:

  • Build the Druid distribution.
  • Build the Druid image. (< 1 minute)
  • Launch the cluster for the particular test. (a few seconds)
  • Run the test any number of times in your debugger.
  • Clean up the test artifacts.

The result is that the fastest path to develop a Druid patch or feature is:

  • Create a normal unit test and run it to verify your code.
  • Create an integration test that double-checks the code in a live cluster.