[provider] Recognize Opensearch version without compatibility mode.

Closes #218

.github/workflows/test.yml

@@ -110,9 +110,6 @@ jobs:
       # ensure that ES has come up and is available
       run: |
         ./script/wait-for-endpoint --timeout=20 http://localhost:9200
-        if [ -n "$OPENSEARCH_PREFIX" ]; then
-          curl -s -v -X PUT -H 'Content-type: application/json' -d '{"persistent": {"compatibility.override_main_response_version": true}}' http://localhost:9200/_cluster/settings
-        fi
     - name: Wait for Kibana
       # ensure that Kibana API has come up and is available
       run: |
@@ -122,15 +119,11 @@ jobs:
     - name: Warm up OpenDistro/Opensearch
       # - OpenDistro lazily initializes its indexes, see
       #   https://github.com/opendistro-for-elasticsearch/alerting/issues/60
-      # - OpenSearch 1.x uses a compatibility mode to maintain ESv7.x version
       run: |
         if [ -n "$ES_OPENDISTRO_IMAGE" ]; then
           ./script/wait-for-endpoint --timeout=120 http://admin:admin@localhost:9220
           curl -s -v -X POST -H 'Content-type: application/json' -d '{"name":"_warmup","type":"slack","slack":{"url": "http://www.example.com"}}' http://admin:admin@localhost:9220/_opendistro/_alerting/destinations
         fi
-        if [ -n "$OPENSEARCH_PREFIX" ]; then
-          curl -s -v -X PUT -H 'Content-type: application/json' -d '{"persistent": {"compatibility.override_main_response_version": true}}' http://admin:admin@localhost:9220/_cluster/settings
-        fi
     - name: Dump docker logs on failure
       if: failure()
       uses: jwalton/gh-docker-logs@v2

README.md

@@ -2,7 +2,7 @@
 
 ![Test](https://github.com/phillbaker/terraform-provider-elasticsearch/workflows/Test/badge.svg?branch=master)
 
-This is a terraform provider that lets you provision Elasticsearch and Opensearch resources, compatible with v6 and v7 of Elasticsearch and v1 of Opensearch ([via compatibility mode](https://opensearch.org/docs/latest/clients/agents-and-ingestion-tools/index/)). Based off of an [original PR to Terraform](https://github.com/hashicorp/terraform/pull/13238).
+This is a terraform provider that lets you provision Elasticsearch and Opensearch resources, compatible with v6 and v7 of Elasticsearch and v1 of Opensearch. Based off of an [original PR to Terraform](https://github.com/hashicorp/terraform/pull/13238).
 
 ## Using the Provider
 

docs/index.md

@@ -10,7 +10,7 @@ The provider is used to interact with the resources supported by
 Elasticsearch/Opensearch. The provider needs to be configured with an endpoint
 URL before it can be used.
 
-AWS Opensearch Service domains and OpenSearch clusters deployed on Kubernetes and other infrastructure are supported [via compatibility mode](https://opensearch.org/docs/latest/clients/agents-and-ingestion-tools/index/).
+AWS Opensearch Service domains and OpenSearch clusters deployed on Kubernetes and other infrastructure are supported.
 
 Use the navigation to the left to read about the available resources.
 

es/provider.go

@@ -438,8 +438,12 @@ func getClient(conf *ProviderConf) (interface{}, error) {
 		if err != nil {
 			return nil, err
 		}
+	} else if conf.flavor == Unknown && conf.esVersion < "2.0.0" && conf.esVersion >= "1.0.0" {
+		// Version 1.x of OpenSearch very likely. Nothing to do since it's API
+		// compatible with 7.x of ES. If elastic client library supports detecting
+		// flavor, update to Opensearch.
 	} else if conf.esVersion < "6.0.0" {
-		return nil, fmt.Errorf("ElasticSearch version %s is older than 6.0.0 and is not supported.", conf.esVersion)
+		return nil, fmt.Errorf("ElasticSearch version %s is older than 6.0.0 and is not supported, flavor: %v.", conf.esVersion, conf.flavor)
 	}
 
 	return relevantClient, nil

es/resource_elasticsearch_component_template.go

@@ -12,7 +12,7 @@ import (
 	elastic7 "github.com/olivere/elastic/v7"
 )
 
-var componentTemplateMinimalVersion, _ = version.NewVersion("7.8.0")
+var esComponentTemplateMinimalVersion, _ = version.NewVersion("7.8.0")
 
 func resourceElasticsearchComponentTemplate() *schema.Resource {
 	return &schema.Resource{
@@ -67,10 +67,10 @@ func resourceElasticsearchComponentTemplateRead(d *schema.ResourceData, meta int
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
-				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComponentTemplateAvailable(elasticVersion, providerConf) {
 				result, err = elastic7GetComponentTemplate(client, id)
+			} else {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default:
@@ -127,10 +127,10 @@ func resourceElasticsearchComponentTemplateDelete(d *schema.ResourceData, meta i
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
-				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComponentTemplateAvailable(elasticVersion, providerConf) {
 				err = elastic7DeleteComponentTemplate(client, id)
+			} else {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default:
@@ -144,6 +144,10 @@ func resourceElasticsearchComponentTemplateDelete(d *schema.ResourceData, meta i
 	return nil
 }
 
+func resourceElasticsearchComponentTemplateAvailable(v *version.Version, c *ProviderConf) bool {
+	return v.GreaterThanOrEqual(esComponentTemplateMinimalVersion) || c.flavor == Unknown
+}
+
 func elastic7DeleteComponentTemplate(client *elastic7.Client, id string) error {
 	_, err := client.IndexDeleteComponentTemplate(id).Do(context.TODO())
 	return err
@@ -165,10 +169,10 @@ func resourceElasticsearchPutComponentTemplate(d *schema.ResourceData, meta inte
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
-				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComponentTemplateAvailable(elasticVersion, providerConf) {
 				err = elastic7PutComponentTemplate(client, name, body, create)
+			} else {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default:

es/resource_elasticsearch_composable_index_template.go

@@ -48,6 +48,10 @@ func resourceElasticsearchComposableIndexTemplateCreate(d *schema.ResourceData,
 	return nil
 }
 
+func resourceElasticsearchComposableIndexTemplateAvailable(v *version.Version, c *ProviderConf) bool {
+	return v.GreaterThanOrEqual(minimalESComposableTemplateVersion) || c.flavor == Unknown
+}
+
 func resourceElasticsearchComposableIndexTemplateRead(d *schema.ResourceData, meta interface{}) error {
 	id := d.Id()
 
@@ -64,10 +68,10 @@ func resourceElasticsearchComposableIndexTemplateRead(d *schema.ResourceData, me
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(minimalESComposableTemplateVersion) {
-				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComposableIndexTemplateAvailable(elasticVersion, providerConf) {
 				result, err = elastic7GetIndexTemplate(client, id)
+			} else {
+				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default:
@@ -124,10 +128,10 @@ func resourceElasticsearchComposableIndexTemplateDelete(d *schema.ResourceData,
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(minimalESComposableTemplateVersion) {
-				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComposableIndexTemplateAvailable(elasticVersion, providerConf) {
 				err = elastic7DeleteIndexTemplate(client, id)
+			} else {
+				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default:
@@ -162,10 +166,10 @@ func resourceElasticsearchPutComposableIndexTemplate(d *schema.ResourceData, met
 	case *elastic7.Client:
 		elasticVersion, err = version.NewVersion(providerConf.esVersion)
 		if err == nil {
-			if elasticVersion.LessThan(minimalESComposableTemplateVersion) {
-				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
-			} else {
+			if resourceElasticsearchComposableIndexTemplateAvailable(elasticVersion, providerConf) {
 				err = elastic7PutIndexTemplate(client, name, body, create)
+			} else {
+				err = fmt.Errorf("index_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
 			}
 		}
 	default: