Add OpenSearch Support to Golang Migrate

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go_bindata github github_ee bitbucket aws_s3 google_cloud_storage godoc_vfs gitlab
-DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite opensearch
 DATABASE_TEST ?= $(DATABASE) sqlite sqlite3 sqlcipher
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=

README.md

@@ -44,6 +44,7 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
 * [Firebird](database/firebird)
 * [MS SQL Server](database/sqlserver)
 * [rqlite](database/rqlite)
+* [OpenSearch](database/opensearch)
 
 ### Database URLs
 

database/opensearch/README.md

@@ -0,0 +1,18 @@
+# OpenSearch
+
+* Driver work with OpenSearch through [OpenSearch REST API](https://opensearch.org/docs/latest/getting-started/communicate/#opensearch-rest-api)
+* Migrations are written in JSON format and support actions such as creating indices, updating mappings, modifying settings and etc.
+* [Examples](./examples)
+
+# Usage
+
+`opensearch://user:password@host:port/index` 
+
+| URL Query  | Default value | Description |
+|------------|---------------------|-------------|
+| `index` | `.migrations` | Name of the migrations index |
+| `timeout` | `60s` | The max time that an operation will wait before failing. |
+| `user` | | The user to sign in as. Can be omitted |
+| `password` | | The user's password. Can be omitted | 
+| `host` | | The host to connect to |
+| `port` | | The port to bind to |

database/opensearch/examples/migrations/1_create_index.down.json

@@ -0,0 +1,4 @@
+{
+    "action": "DELETE /test-index",
+    "body": {}
+}

database/opensearch/examples/migrations/1_create_index.json

@@ -0,0 +1,16 @@
+{
+    "action": "PUT /test-index",
+    "body": {
+        "settings": {
+            "number_of_shards": 1,
+            "number_of_replicas": 0
+        },
+        "mappings": {
+            "properties": {
+                "title": {
+                    "type": "text"
+                }
+            }
+        }
+    }
+}