Basic operator (#10)

* Add reconcile function

* Format Rust code

* Deploy a StatefulSet

* Structure reconcile function

* Split controller into validation and build part and introduce some type-safety

* Use the qualified role group name for the StatefulSet

* Refactor "apply" and "update_status"

* Add ContextNames structure

* Improve error handling

* Merge role and role-group configs; Deploy PodDisruptionBudgets

* Improve macro attributed_string_type

* Rename AppName and AppVersion to ProductName and ProductVersion

* Add configuration options

* Implement overrides and set up first working cluster

* Create test script

* Fix integration test

* test(smoke): Improve security config

* Add startup and readiness probes

* Restructure role and role-group builder

* Improve code quality

* Add resource configuration and defaults

* Restructure build module

* Add ServiceAccount and RoleBinding

* Improve code quality and fix a lot of minor things

* Implement terminationGracePeriodSeconds

* Implement affinities

* Add additional labels to the cluster manager service

* Regenerate charts

* Fix RustDoc warnings

* Remove unnecessary comments from Helm values

* Add changelog

* Add license

* Add actionlint file

* Add config-spec/properties.yaml

* Fix yamllint warnings

Author: siegfriedweber

.actionlint.yaml

@@ -0,0 +1,5 @@
+---
+self-hosted-runner:
+  # Ubicloud machines we are using
+  labels:
+    - ubicloud-standard-8-arm

CHANGELOG.md

@@ -0,0 +1,20 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [Unreleased]
+
+### Added
+
+- Basic operator for OpenSearch 3.x with the following configuration options ([#10]):
+  - Cluster operations like `reconciliationPaused` and `stopped`
+  - Image selection (defaults to the official OpenSearch image for now)
+  - Overrides (CLI, config, environment variables, Pod)
+  - Affinities
+  - Graceful shutdown timeout
+  - OpenSearch node roles
+  - Resources (CPU, memory, storage)
+  - PodDisruptionBudgets
+  - Replicas
+
+[#10]: https://github.com/stackabletech/opensearch-operator/pull/10