Basic operator

[siegfriedweber]

Description

The operator is able to deploy a working OpenSearch cluster. All necessary configurations can be done via overrides. The operator is compatible with the official OpenSearch image. A smoke test is provided.

This pull request does intentionally not fulfill the definition of done. For instance, documentation and code comments are missing and some TODOs are still open. A CRD change request (#8) was approved, but the actual implementation differs slightly.

The missing pieces will be added in following pull requests and the "approved" parts will be revised.

Part of #2

Definition of Done Checklist

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[labrenbe]

lgtm