[PURIFY] Remove Default distribution and only create OSS distribution.

[adnapibar]

The Default distribution is governed by Elastic license and hence needs to be removed and only create OSS distribution.

Clean up distribution (@setiah)

• Clean up non OSS distributions in Docker. - https://github.com/opendistro-for-elasticsearch/search/blob/main/distribution/docker
• Clean up non OSS flavors in Elasticsearch Distributions. - https://github.com/opendistro-for-elasticsearch/search/blob/main/buildSrc/src/main/java/org/elasticsearch/gradle/ElasticsearchDistribution.java#L77
• Clean up non OSS flavors in packaging - https://github.com/opendistro-for-elasticsearch/search/tree/main/distribution/packages
• Clean up UBI Docker flavor - @saratvemulapalli

PR: #102 #103 #110

Test with failures

• DistributionDownloadPluginFuncTest. bwc version can be resolved
• DistributionDownloadPluginFuncTest. current version can be resolved
• DistributionDownloadPluginFuncTest. released version can be resolved
• DistributionDownloadPluginFuncTest. transformed versions are kept across builds
• DistributionDownloadPluginFuncTest. transforms are reused across projects
• TestClustersPluginFuncTest. custom distro folder created for tweaked cluster distribution
• TestClustersPluginFuncTest. test cluster distribution is configured and started
• InternalDistributionBwcSetupPluginFuncTest. builds distribution from branches via archives assemble
• InternalDistributionBwcSetupPluginFuncTest. bwc distribution archives can be resolved as bwc project artifact
• InternalDistributionBwcSetupPluginFuncTest. bwc expanded distribution folder can be resolved as bwc project artifact
• InternalDistributionDownloadPluginFuncTest. resolves current version from local build
• InternalDistributionDownloadPluginFuncTest. resolves expanded bwc versions from source

Remove Flavor Enums (@adnapibar)

• remove the Flavor support
• remove -oss flag dependencies in package and build tests

PR: #104

Test with failures

./gradlew ':qa:rolling-upgrade:v6.8.15#oneThirdUpgradedTest'

• org.elasticsearch.upgrades.IndexingIT.testIndexing
• org.elasticsearch.upgrades.RecoveryIT.testUpdateDoc
• org.elasticsearch.upgrades.RecoveryIT.testSoftDeletesDisabledWarning
• org.elasticsearch.upgrades.RecoveryIT.testRelocationWithConcurrentIndexing
• org.elasticsearch.upgrades.RecoveryIT.testAutoExpandIndicesDuringRollingUpgrade
• org.elasticsearch.upgrades.RecoveryIT.testRetentionLeasesEstablishedWhenPromotingPrimary
• org.elasticsearch.upgrades.RecoveryIT.testRecoveryWithConcurrentIndexing
• org.elasticsearch.upgrades.RecoveryIT.testCloseIndexDuringRollingUpgrade

./gradlew ':qa:mixed-cluster:v6.8.15#mixedClusterTest'

• org.elasticsearch.backwards.IndexingIT.testUpdateSnapshotStatus
• org.elasticsearch.backwards.IndexingIT.testIndexVersionPropagation
• org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT

Clean up buildSrc (@setiah)

• Remove logic to check the distribution flavor and make the OSS as the only option.

[tlfeng]

A failure of license check for Debian packages, and should be fixed when the issue is resolved:

$ ./gradlew :distribution:packages:aarch64-deb:checkLicense     
> Task :distribution:packages:aarch64-deb:checkLicense FAILED

FAILURE: Build failed with an exception.

* Where:
Build file '/home/ftianli/github/search/distribution/build.gradle' line: 640

* What went wrong:
Execution failed for task ':distribution:packages:aarch64-deb:checkLicense'.
> java.nio.file.NoSuchFileException: /home/ftianli/github/search/distribution/packages/aarch64-deb/build/extracted/deb-extracted/usr/share/doc/elasticsearch-oss/copyright

Code for the Gradle task:
https://github.com/opendistro-for-elasticsearch/search/blob/809e5aa1b0803d3f3acbcadef14bda5e9583a4c1/distribution/packages/build.gradle#L489

Cause of the failure:
The expected license for "default" distribution is removed from the check in commit 809e5aa, but the "default" distribution is still built.

[saratvemulapalli]

Probably we can make this as a meta task.
There are references of non-oss code in build script which should be cleaned in packaging.
https://github.com/opendistro-for-elasticsearch/search/blob/main/distribution/packages/build.gradle

[saratvemulapalli]

Another task in the same issue:
Docker images being created for testing distributions are default and oss.
We have to clean up default distribution from:
https://github.com/opendistro-for-elasticsearch/search/blob/main/distribution/docker/build.gradle
https://github.com/opendistro-for-elasticsearch/search/blob/main/distribution/docker/docker-compose.yml

[abbashus]

Adding this related task failure

> Task :distribution:bwc:maintenance:buildBwcOssZip FAILED

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/home/ubuntu/search/distribution/build.gradle' line: 640

* What went wrong:
Execution failed for task ':distribution:packages:aarch64-deb:checkLicense'.
> java.nio.file.NoSuchFileException: /home/ubuntu/search/distribution/packages/aarch64-deb/build/extracted/deb-extracted/usr/share/doc/elasticsearch-oss/copyright

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':distribution:bwc:maintenance:buildBwcOssZip'.
> Building 6.8.14 didn't generate expected file /home/ubuntu/search/distribution/bwc/maintenance/build/bwc/checkout-6.8/distribution/archives/oss-zip/build/distributions/elasticsearch-oss-6.8.14-SNAPSHOT.zip

[nknize]

can this be closed?

[adnapibar]

Yes