Allow the close action to ignore sync flush fails (#1460)

If closing a very large batch of indices, potentially with some being live at runtime, a failure to perform a synced flush is a real possibility. This new option for the ``close`` action, ``ignore_sync_failures``, will allow index closures to continue.

Fixes #1248

Author: untergeek

CONTRIBUTORS

@@ -85,3 +85,4 @@ Contributors:
 * Juraj Seffer (jurajseffer)
 * Roger Steneteg (rsteneteg)
 * Muhammad Junaid Muzammil (junmuz)
+* Loet Avramson (psypuff)

curator/actions.py

@@ -4,7 +4,7 @@
 from copy import deepcopy
 from datetime import datetime
 from curator import exceptions, utils
-from elasticsearch.exceptions import RequestError
+from elasticsearch.exceptions import ConflictError, RequestError
 
 class Alias(object):
     def __init__(self, name=None, extra_settings={}, **kwargs):
@@ -256,14 +256,17 @@ def do_action(self):
 
 
 class Close(object):
-    def __init__(self, ilo, delete_aliases=False, skip_flush=False):
+    def __init__(self, ilo, delete_aliases=False, skip_flush=False, ignore_sync_failures=False):
         """
         :arg ilo: A :class:`curator.indexlist.IndexList` object
         :arg delete_aliases: If `True`, will delete any associated aliases
             before closing indices.
         :type delete_aliases: bool
         :arg skip_flush: If `True`, will not flush indices before closing.
         :type skip_flush: bool
+        :arg ignore_sync_failures: If `True`, will not fail if there are failures while attempting
+            a synced flush.
+        :type ignore_sync_failures: bool
         """
         utils.verify_index_list(ilo)
         #: Instance variable.
@@ -276,9 +279,12 @@ def __init__(self, ilo, delete_aliases=False, skip_flush=False):
         #: Internal reference to `skip_flush`
         self.skip_flush = skip_flush
         #: Instance variable.
+        #: Internal reference to `ignore_sync_failures`
+        self.ignore_sync_failures = ignore_sync_failures
+        #: Instance variable.
         #: The Elasticsearch Client object derived from `ilo`
-        self.client     = ilo.client
-        self.loggit     = logging.getLogger('curator.actions.close')
+        self.client = ilo.client
+        self.loggit = logging.getLogger('curator.actions.close')
 
 
     def do_dry_run(self):
@@ -295,7 +301,10 @@ def do_action(self):
         self.index_list.filter_closed()
         self.index_list.empty_list_check()
         self.loggit.info(
-            'Closing {0} selected indices: {1}'.format(len(self.index_list.indices), self.index_list.indices))
+            'Closing %s selected indices: %s' % (
+                len(self.index_list.indices), self.index_list.indices
+                )
+        )
         try:
             index_lists = utils.chunk_index_list(self.index_list.indices)
             for l in index_lists:
@@ -312,8 +321,16 @@ def do_action(self):
                             ' {0}'.format(e)
                         )
                 if not self.skip_flush:
-                    self.client.indices.flush_synced(
-                        index=utils.to_csv(l), ignore_unavailable=True)
+                    try:
+                        self.client.indices.flush_synced(
+                            index=utils.to_csv(l), ignore_unavailable=True)
+                    except ConflictError as err:
+                        if not self.ignore_sync_failures:
+                            raise ConflictError(err.status_code, err.error, err.info)
+                        else:
+                            self.loggit.warn(
+                                'Ignoring flushed sync failures: %s %s' % (err.error, err.info)
+                            )
                 self.client.indices.close(
                     index=utils.to_csv(l), ignore_unavailable=True)
         except Exception as e:

curator/defaults/option_defaults.py

@@ -57,6 +57,9 @@ def ignore_empty_list():
 def ignore_existing():
     return { Optional('ignore_existing', default=False): Any(bool, All(Any(*string_types), Boolean())) }
 
+def ignore_sync_failures():
+    return { Optional('ignore_sync_failures', default=False): Any(bool, All(Any(*string_types), Boolean())) }
+
 def ignore_unavailable():
     return { Optional('ignore_unavailable', default=False): Any(bool, All(Any(*string_types), Boolean())) }
 

curator/validators/options.py

@@ -19,7 +19,8 @@ def action_specific(action):
         ],
         'close' : [
             option_defaults.delete_aliases(),
-            option_defaults.skip_flush()
+            option_defaults.skip_flush(),
+            option_defaults.ignore_sync_failures(),
         ],
         'cluster_routing' : [
             option_defaults.routing_type(),

docs/Changelog.rst

@@ -8,6 +8,7 @@ Changelog
 
 **New**
 
+  * Require ``elasticsearch-py`` version 7.0.4
   * New client configuration option: api_key - used in the X-Api-key header in
     requests to Elasticsearch when set, which may be required if ReadonlyREST
     plugin is configured to require api-key. Requested in #1409 (vetler)
@@ -25,6 +26,8 @@ Changelog
   * Add support for ``freeze`` and ``unfreeze`` indexes using curator. Requires
     Elasticsearch version 6.6 or greater with xpack enabled. Requested in issue
     #1399 and rasied in PR #1454. (junmuz)
+  * Allow the ``close`` action to ignore synced flush failures with the new
+    ``ignore_sync_failures`` option.  Raised in #1248. (untergeek)
 
 **Bug Fixes**
 

docs/asciidoc/actions.asciidoc

@@ -175,8 +175,9 @@ TIP: See an example of this action in an <<actionfile,actionfile>>
 action: close
 description: "Close selected indices"
 options:
-  delete_aliases: False
-  skip_flush: False
+  delete_aliases: false
+  skip_flush: false
+  ignore_sync_failures: false
 filters:
 - filtertype: ...
 -------------
@@ -192,6 +193,7 @@ aliases beforehand.
 
 * <<option_delete_aliases,delete_aliases>>
 * <<option_skip_flush,skip_flush>>
+* <<option_ignore_sync_failures,ignore_sync_failures>>
 * <<option_ignore_empty,ignore_empty_list>>
 * <<option_timeout_override,timeout_override>>
 * <<option_continue,continue_if_exception>>

docs/asciidoc/examples.asciidoc

@@ -136,6 +136,7 @@ actions:
     options:
       skip_flush: False
       delete_aliases: False
+      ignore_sync_failures: True
       disable_action: True
     filters:
     - filtertype: pattern

docs/asciidoc/index.asciidoc

@@ -1,7 +1,7 @@
 :curator_version: 5.8.0
 :curator_major: 5
 :curator_doc_tree: 5.8
-:es_py_version: 7.0.2
+:es_py_version: 7.0.4
 :es_doc_tree: 7.3
 :stack_doc_tree: 7.3
 :pybuild_ver: 3.6.8

docs/asciidoc/options.asciidoc

@@ -458,6 +458,28 @@ an ERROR level message will be logged, and Curator will exit with code 1.
 
 The default value of this setting is `False`
 
+[[option_ignore_sync_failures]]
+== ignore_sync_failures
+
+NOTE: This setting is only used by the <<close,close action>>, and is
+    optional.
+
+[source,yaml]
+-------------
+action: close
+description: "Close selected indices"
+options:
+  ignore_sync_failures: false
+filters:
+- filtertype: ...
+-------------
+
+If `ignore_sync_failures` is set to `true`, Curator will ignore failures during
+the synced flush that normally takes place before closing. This may be useful
+for closing a list of indices which may include active indices.
+
+The default value is `false`.
+
 [[option_ignore]]
 == ignore_unavailable
 

requirements.txt

@@ -1,5 +1,5 @@
 voluptuous>=0.9.3
-elasticsearch>=7.0.2,<8.0.0
+elasticsearch>=7.0.4,<8.0.0
 urllib3>=1.24.2,<1.25
 requests>=2.20.0
 boto3>=1.9.142