Fixing get_hits_count for es 7.x

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+      {
+          "name": "Python: Module",
+          "type": "python",
+          "request": "launch",
+          "module": "elastalert.elastalert",
+          "args": [
+            "--config",
+            "../elastalert_config/opensearch/config.yaml"
+          ],
+          "env": {
+            "AWS_ACCESS_KEY_ID": "A",
+            "AWS_SECRET_ACCESS_KEY": "K"
+          }
+      }
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "python.testing.pytestArgs": [
+      "tests"
+  ],
+  "python.testing.unittestEnabled": false,
+  "python.testing.nosetestsEnabled": false,
+  "python.testing.pytestEnabled": true
+} 

elastalert/elastalert.py

@@ -456,8 +456,21 @@ def get_hits_count(self, rule, starttime, endtime, index):
             five=rule['five']
         )
 
+        es_client = self.thread_data.current_es
         try:
-            res = self.thread_data.current_es.count(index=index, doc_type=rule['doc_type'], body=query, ignore_unavailable=True)
+            if es_client.is_atleastsixsix():
+                res = es_client.count(
+                    index=index,
+                    body=query,
+                    ignore_unavailable=True
+                )
+            else:
+                res = es_client.count(
+                    index=index,
+                    doc_type=rule['doc_type'],
+                    body=query,
+                    ignore_unavailable=True
+                )
         except ElasticsearchException as e:
             # Elasticsearch sometimes gives us GIGANTIC error messages
             # (so big that they will fill the entire terminal buffer)