sos/SOURCES/sos-bz2125656-plugin-make-forbidden-path-checks-more-efficient.patch
2022-10-25 09:32:57 +00:00

134 lines
5.0 KiB
Diff

From 1dc3625fabea7331570f713fd1c87ac812d72d92 Mon Sep 17 00:00:00 2001
From: Jake Hunsaker <jhunsake@redhat.com>
Date: Wed, 18 May 2022 13:39:38 -0400
Subject: [PATCH] [Plugin] Make forbidden path checks more efficient
Forbidden path checks have up until now worked by taking a given file
path (potentially with globs), expanding that against all discovered
files that actually exist on the system, and then comparing a potential
collection path against that list.
While this works, and works reasonably fast for most scenarios, it isn't
very efficient and causes significant slow downs when a non-standard
configuration is in play - e.g. thousands of block devices which sos
would individually have to compare against tens of thousands of paths
for every path the `block` plugin wants to collect.
Improve this by first not expanding the forbidden path globs, but taking
them as distinct patterns, translating from shell-style (to maintain
historical precedent of using globs to specify paths to be skipped) to
python regex patterns as needed. Second, use `re` to handle our pattern
matching for comparison against the distinct patterns provided by a
plugin to skip.
Closes: #2938
Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>
---
sos/report/plugins/__init__.py | 20 +++++++++-----------
sos/report/plugins/cgroups.py | 6 ++----
sos/report/plugins/pulpcore.py | 2 +-
sos/report/plugins/rhui.py | 2 +-
4 files changed, 13 insertions(+), 17 deletions(-)
diff --git a/sos/report/plugins/__init__.py b/sos/report/plugins/__init__.py
index 2a42e6b0..ba1397a8 100644
--- a/sos/report/plugins/__init__.py
+++ b/sos/report/plugins/__init__.py
@@ -46,11 +46,6 @@ def _mangle_command(command, name_max):
return mangledname
-def _path_in_path_list(path, path_list):
- return any((p == path or path.startswith(os.path.abspath(p)+os.sep)
- for p in path_list))
-
-
def _node_type(st):
""" return a string indicating the type of special node represented by
the stat buffer st (block, character, fifo, socket).
@@ -1407,7 +1402,9 @@ class Plugin():
return None
def _is_forbidden_path(self, path):
- return _path_in_path_list(path, self.forbidden_paths)
+ return any(
+ re.match(forbid, path) for forbid in self.forbidden_paths
+ )
def _is_policy_forbidden_path(self, path):
return any([
@@ -1495,14 +1492,12 @@ class Plugin():
'symlink': "no"
})
- def add_forbidden_path(self, forbidden, recursive=False):
+ def add_forbidden_path(self, forbidden):
"""Specify a path, or list of paths, to not copy, even if it's part of
an ``add_copy_spec()`` call
:param forbidden: A filepath to forbid collection from
:type forbidden: ``str`` or a ``list`` of strings
-
- :param recursive: Should forbidden glob be applied recursively
"""
if isinstance(forbidden, str):
forbidden = [forbidden]
@@ -1244,8 +1244,11 @@
for forbid in forbidden:
self._log_info("adding forbidden path '%s'" % forbid)
- for path in glob.glob(forbid, recursive=recursive):
- self.forbidden_paths.append(path)
+ if "*" in forbid:
+ # calling translate() here on a dir-level path will break the
+ # re.match() call during path comparison
+ forbid = fnmatch.translate(forbid)
+ self.forbidden_paths.append(forbid)
def get_all_options(self):
"""return a list of all options selected"""
diff --git a/sos/report/plugins/cgroups.py b/sos/report/plugins/cgroups.py
index 6e2a6918..20d299cf 100644
--- a/sos/report/plugins/cgroups.py
+++ b/sos/report/plugins/cgroups.py
@@ -30,6 +30,9 @@
])
self.add_cmd_output("systemd-cgls")
+ self.add_forbidden_path(
+ "/sys/fs/cgroup/memory/**/memory.kmem.slabinfo"
+ )
return
diff --git a/sos/report/plugins/pulpcore.py b/sos/report/plugins/pulpcore.py
index 6c4237ca..f6bc194c 100644
--- a/sos/report/plugins/pulpcore.py
+++ b/sos/report/plugins/pulpcore.py
@@ -89,7 +89,7 @@
"/etc/pki/pulp/*"
])
# skip collecting certificate keys
- self.add_forbidden_path("/etc/pki/pulp/**/*.key", recursive=True)
+ self.add_forbidden_path("/etc/pki/pulp/**/*.key")
self.add_cmd_output("rq info -u redis://localhost:6379/8",
env={"LC_ALL": "en_US.UTF-8"},
diff --git a/sos/report/plugins/rhui.py b/sos/report/plugins/rhui.py
index add02461..8063fd51 100644
--- a/sos/report/plugins/rhui.py
+++ b/sos/report/plugins/rhui.py
@@ -30,7 +30,7 @@ class Rhui(Plugin, RedHatPlugin):
"/var/log/rhui/*",
])
# skip collecting certificate keys
- self.add_forbidden_path("/etc/pki/rhui/**/*.key", recursive=True)
+ self.add_forbidden_path("/etc/pki/rhui/**/*.key")
# call rhui-manager commands with 1m timeout and
# with an env. variable ensuring that "RHUI Username:"
--
2.27.0