Source code for insights.combiners.logrotate_conf

LogrotateConfAll - Combiner for logrotate configuration
Combiner for accessing all the logrotate configuration files.  It collects all
LogrotateConf generated from each single logrotate configuration file.

There may be multiple logrotate configuration, and the main configuration file is
``/etc/logrotate.conf``.  Only the options defined in this file are global
options, and all other options (if there are) will be discarded.


import operator
import os
import string
from fnmatch import fnmatch
from insights.core import ConfigCombiner, ConfigParser
from insights.core.plugins import combiner, parser
from insights.parsers.logrotate_conf import LogrotateConf
from insights.parsr.query import eq
from insights.specs import Specs
from insights.parsr import (AnyChar, Choice, EOF, EOL, Forward, LeftCurly,
        LineEnd, Literal, Many, Number, OneLineComment, Opt, PosMarker,
        QuotedString, RightCurly, skip_none, String, WS, WSChar)
from insights.parsr.query import Directive, Entry, Section

[docs]@combiner(LogrotateConf) class LogrotateConfAll(object): """ Class for combining all the logrotate configuration files. Sample files:: # /etc/logrotate.conf: compress rotate 7 /var/log/messages { rotate 5 weekly postrotate /sbin/killall -HUP syslogd endscript } # /etc/logrotate.d/httpd "/var/log/httpd/access.log" /var/log/httpd/error.log { rotate 5 mail size=100k sharedscripts postrotate /sbin/killall -HUP httpd endscript } # /etc/logrotate.d/newscrit /var/log/news/*.crit { monthly rotate 2 olddir /var/log/news/old missingok postrotate kill -HUP `cat /var/run/` endscript nocompress } Examples: >>> all_lrt.global_options ['compress', 'rotate'] >>> all_lrt['rotate'] '7' >>> '/var/log/httpd/access.log' in all_lrt.log_files True >>> all_lrt['/var/log/httpd/access.log']['rotate'] '5' >>> all_lrt.configfile_of_logfile('/var/log/news/olds.crit') '/etc/logrotate.d/newscrit' >>> all_lrt.options_of_logfile('/var/log/httpd/access.log')['mail'] '' Attributes: data(dict): All parsed options and log files are stored in this dictionary global_options(list): List of global options defined in ``/etc/logrotate.conf`` log_files(list): List of log files in all logrotate configuration files """ def __init__(self, lrt_conf): = {} self.global_options = [] self.log_files = [] self._file_map = {} for lrt in lrt_conf: if lrt.file_path == "/etc/logrotate.conf": self.global_options = lrt.options self.log_files.extend(lrt.log_files) self._file_map[lrt.file_path] = lrt.log_files def __contains__(self, item): return (item in self.global_options or any(fnmatch(item, f) for f in self.log_files)) def __getitem__(self, item): if item in self.global_options: return[item] return def _get_match_logfile(self, log_file, file_list=[]): file_list = self.log_files if not file_list else file_list for f in file_list: if fnmatch(log_file, f): return f
[docs] def options_of_logfile(self, log_file): """ Get the options of ``log_file``. Parameters: log_file(str): The log files need to check. Returns: dict: Dictionary contains the options of ``log_file``. None when no such ``log_file``. """ return
[docs] def configfile_of_logfile(self, log_file): """ Get the configuration file path in which the ``log_file`` is configured. Parameters: log_file(str): The log files need to check. Returns: dict: The configuration file path of ``log_file``. None when no such ``log_file``. """ for f, lfs in self._file_map.items(): if self._get_match_logfile(log_file, lfs): return f
class DocParser(object): def __init__(self, ctx): self.ctx = ctx scripts = set("postrotate prerotate firstaction lastaction preremove".split()) Stanza = Forward() Spaces = Many(WSChar) Bare = String(set(string.printable) - (set(string.whitespace) | set("#{}'\""))) Num = Number & (WSChar | LineEnd) Comment = OneLineComment("#").map(lambda x: None) ScriptStart = WS >> PosMarker(Choice([Literal(s) for s in scripts])) << WS ScriptEnd = Literal("endscript") Line = (WS >> AnyChar.until(EOL) << WS).map(lambda x: "".join(x)) Lines = Line.until(ScriptEnd).map(lambda x: "\n".join(x)) Script = ScriptStart + Lines << ScriptEnd Script = x: [x[0], [x[1]], None]) BeginBlock = WS >> LeftCurly << WS EndBlock = WS >> RightCurly First = PosMarker((Bare | QuotedString)) << Spaces Attr = Spaces >> (Num | Bare | QuotedString) << Spaces Rest = Many(Attr) Block = BeginBlock >> Many(Stanza).map(skip_none).map(self.to_entries) << EndBlock Stmt = WS >> (Script | (First + Rest + Opt(Block))) << WS Stanza <= WS >> (Stmt | Comment) << WS Doc = Many(Stanza).map(skip_none).map(self.to_entries) self.Top = Doc + EOF def to_entries(self, x): ret = [] for i in x: name, attrs, body = i if body: for n in [name.value] + attrs: ret.append(Section(name=n, children=body, lineno=name.lineno)) else: ret.append(Directive(name=name.value, attrs=attrs, lineno=name.lineno)) return ret def __call__(self, content): return self.Top(content)
[docs]def parse_doc(content, ctx=None): """ Parse a configuration document into a tree that can be queried. """ if isinstance(content, list): content = "\n".join(content) parse = DocParser(ctx) result = parse(content)[0] return Entry(children=result, src=ctx)
@parser(Specs.logrotate_conf, continue_on_error=False) class _LogRotateConf(ConfigParser): def parse_doc(self, content): return parse_doc("\n".join(content), ctx=self)
[docs]@combiner(_LogRotateConf) class LogRotateConfTree(ConfigCombiner): """ Exposes logrotate configuration through the parsr query interface. See the :py:class:`insights.core.ConfigComponent` class for example usage. """ def __init__(self, confs): include = eq("include") main_file = "logrotate.conf" super(LogRotateConfTree, self).__init__(confs, main_file, include) @property def conf_path(self): return os.path.dirname(self.main.file_path) def find_matches(self, confs, pattern): results = [] for c in confs: if os.path.isdir(pattern) and c.file_path.startswith(pattern): results.append(c) elif fnmatch(c.file_path, pattern): results.append(c) return sorted(results, key=operator.attrgetter("file_name"))
[docs]def get_tree(root=None): """ This is a helper function to get a logrotate configuration component for your local machine or an archive. It's for use in interactive sessions. """ from insights import run return run(LogRotateConfTree, root=root).get(LogRotateConfTree)