Add elasticsearch log filtering while trying to connect

server/elastic/initialize.py

@@ -1,5 +1,8 @@
+import logging
 from time import sleep
+from typing import Type, Optional, Sequence, Any, Union
 
+import urllib3.exceptions
 from elasticsearch import Elasticsearch, exceptions
 
 import es_factory
@@ -25,6 +28,39 @@ class ElasticConnectionError(Exception):
     pass
 
 
+class ConnectionErrorFilter(logging.Filter):
+    def __init__(
+        self,
+        level: Optional[Union[int, str]] = None,
+        err_type: Optional[Type] = None,
+        args_prefix: Optional[Sequence[Any]] = None,
+    ):
+        super(ConnectionErrorFilter, self).__init__()
+        if level is None:
+            self.level = None
+        else:
+            try:
+                self.level = int(level)
+            except ValueError:
+                self.level = logging.getLevelName(level)
+
+        self.err_type = err_type
+        self.args = args_prefix and tuple(args_prefix)
+        self.last_blocked = None
+
+    def filter(self, record):
+        allow = (
+            (self.err_type is None or record.exc_info[0] != self.err_type)
+            and (self.level is None or record.levelno != self.level)
+            and (self.args is None or record.args[: len(self.args)] != self.args)
+        )
+
+        if not allow:
+            self.last_blocked = record
+
+        return int(allow)
+
+
 def check_elastic_empty() -> bool:
     """
     Check for elasticsearch connection
@@ -35,20 +71,32 @@ def check_elastic_empty() -> bool:
     cluster_conf = es_factory.get_cluster_config("events")
     max_retries = config.get("apiserver.elastic.probing.max_retries", 4)
     timeout = config.get("apiserver.elastic.probing.timeout", 30)
-    for retry in range(max_retries):
-        try:
-            es = Elasticsearch(hosts=cluster_conf.get("hosts"))
-            return not es.indices.get_template(name="events*")
-        except exceptions.NotFoundError as ex:
-            log.error(ex)
-            return True
-        except exceptions.ConnectionError:
-            if retry >= max_retries - 1:
-                raise ElasticConnectionError()
-            log.warn(
-                f"Could not connect to es server. Retry {retry+1} of {max_retries}. Waiting for {timeout}sec"
-            )
-            sleep(timeout)
+
+    es_logger = logging.getLogger("elasticsearch")
+    log_filter = ConnectionErrorFilter(
+        err_type=urllib3.exceptions.NewConnectionError, args_prefix=("GET",)
+    )
+
+    try:
+        es_logger.addFilter(log_filter)
+        for retry in range(max_retries):
+            try:
+                es = Elasticsearch(hosts=cluster_conf.get("hosts"))
+                return not es.indices.get_template(name="events*")
+            except exceptions.NotFoundError as ex:
+                log.error(ex)
+                return True
+            except exceptions.ConnectionError as ex:
+                if retry >= max_retries - 1:
+                    raise ElasticConnectionError(
+                        f"Error connecting to Elasticsearch: {str(ex)}"
+                    )
+                log.warn(
+                    f"Could not connect to ElasticSearch Service. Retry {retry+1} of {max_retries}. Waiting for {timeout}sec"
+                )
+                sleep(timeout)
+    finally:
+        es_logger.removeFilter(log_filter)
 
 
 def init_es_data():