mirror of
https://github.com/bashclub/check-zfs-replication.git
synced 2024-12-24 17:00:11 +01:00
Added checkzfs.py version 1.38
This commit is contained in:
Thorsten Spille
GitHub
parent
559cf93067
commit
dede84af88
392
checkzfs.py
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392
checkzfs.py
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#!/usr/bin/env python3
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# vim:fenc=utf-8:noet
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## Copyright 2021 sysops.tv ;-)
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## BSD-2-Clause
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##
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## Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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##
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## 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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##
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## 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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## THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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## BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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## GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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## LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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VERSION = 1.38
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import sys
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import re
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import subprocess
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import time
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import json
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import os.path
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import socket
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from email.message import EmailMessage
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class zfscheck(object):
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ZFSLIST_REGEX = re.compile("^(?P<dataset>.*?)(?:|@(?P<snapshot>.*?))\t(?P<creation>\d+)\t(?P<guid>\d+)\t(?P<used>\d+)\t(?P<referenced>\d+)$",re.M) ## todo used/referenced ... diff zum replica
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ZFS_LOCAL_SNAPSHOTS = []
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ZFS_DATASTORES = {}
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ZFS_RESULT_SNAPSHOT = {}
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VALIDCOLUMNS = ["dataset","snapshot","creation","guid","used","referenced","size","age","status","copy"] ## valid columns
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DEFAULT_COLUMNS = ["dataset","snapshot","age","count","copy"] ## default columns
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DATEFORMAT = "%a %d.%b.%Y %H:%M"
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COLOR_CONSOLE = {
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"warn" : "\033[93m",
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"crit" : "\033[91m",
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"reset" : "\033[0m"
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}
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COLUMN_NAMES = { ## Namen frei editierbar
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"dataset" : "Dataset",
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"snapshot" : "Snapshotname",
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"creation" : "Erstellungszeit",
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"age" : "Alter",
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"count" : "Anzahl",
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"used" : "Größe",
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"copy" : "Replikat"
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}
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COLUMN_ALIGN = {
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"dataset" : "<",
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"snapshot" : "<",
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"copy" : "<",
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"status" : "^"
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}
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TIME_MULTIPLICATOR = { ## todo
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"h" : 60, ## Stunden
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"d" : 60*24, ## Tage
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"w" : 60 * 24 * 7, ## Wochen
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"m" : 60 * 24 * 30 ## Monat
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}
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COLUMN_MAPPER = {}
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def __init__(self,**kwargs):
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_start_time = time.time()
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self.remote = None
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self.filter = None
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self.rawdata = False
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self.sortreverse = False
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self._check_kwargs(kwargs)
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_data = self.get_data()
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_script_runtime = time.time() - _start_time
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if self.output == "text":
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print(self.table_output(_data))
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if self.output == "html":
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print( self.html_output(_data) )
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if self.output == "mail":
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self.mail_output(_data)
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if self.output == "checkmk":
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self.checkmk_output(_data)
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if self.output == "json":
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print(self.json_output(_data))
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print ("Runtime: {0:.2f}".format(_script_runtime))
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def _check_kwargs(self,kwargs):
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## argumente überprüfen
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for _k,_v in kwargs.items():
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if _k == "columns":
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_default = self.DEFAULT_COLUMNS[:]
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if not _v:
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self.columns = _default
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continue ## defaults
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# add modus wenn mit +
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if not _v.startswith("+"):
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_default = []
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else:
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_v = _v[1:]
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_v = _v.split(",")
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for _column in _v:
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if _column not in self.VALIDCOLUMNS:
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raise Exception("invalid column {0} ({1})".format(_v,",".join(self.VALIDCOLUMNS)))
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_default.append(_column)
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_v = list(_default)
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if _k == "sort" and _v:
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## sortierung desc wenn mit +
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if _v.startswith("+"):
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self.sortreverse = True
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_v = _v[1:]
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if _v not in self.VALIDCOLUMNS:
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raise Exception("invalid sort column: {0} ({1})".format(_v,",".join(self.VALIDCOLUMNS)))
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if _k == "threshold" and _v:
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_v = _v.split(",")
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## todo tage etc
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_v = list(map(int,_v[:2])) ## convert zu int
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if len(_v) == 1:
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_v = (float("inf"),_v[0])
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if _k == "filter" and _v:
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_v = re.compile(_v)
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setattr(self,_k,_v)
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## funktionen zum anzeigen / muss hier da sonst kein self
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if not self.rawdata:
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self.COLUMN_MAPPER = {
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"creation" : self.convert_ts_date,
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"age" : self.seconds2timespan,
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"used" : self.format_bytes,
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"size" : self.format_bytes,
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"referenced" : self.format_bytes,
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}
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def get_data(self):
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_data = self._call_proc()
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self.get_local_snapshots(_data)
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if self.remote:
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_data = self._call_proc(self.remote)
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return self.get_snapshot_results(_data)
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def get_local_snapshots(self,data):
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for _entry in self._parse(data):
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_entry.update({
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"creation" : int(_entry.get("creation",0))
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})
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if _entry.get("snapshot") == None:
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self.ZFS_DATASTORES[_entry.get("dataset")] = _entry
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self.ZFS_LOCAL_SNAPSHOTS.append(_entry)
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def get_snapshot_results(self,data):
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_now = time.time()
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for _entry in self._parse(data):
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if _entry.get("snapshot") == None:
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continue ## TODO
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if self.filter and not self.filter.search("{dataset}@{snapshot}".format(**_entry)):
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continue
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_timestamp = int(_entry.get("creation",0))
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_dataset = _entry["dataset"]
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_entry.update({
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"creation" : _timestamp,
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"age" : int(_now - _timestamp),
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"count" : 1,
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"size" : self.ZFS_DATASTORES.get(_dataset,{}).get("used",0),
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"used" : int(_entry.get("used",0)),
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"referenced": int(_entry.get("referenced",0)),
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"copy" : "",
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"status" : self.check_threshold(_now -_timestamp)
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})
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_copys = list(
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filter(lambda x: x.get("guid") == _entry.get("guid") and x.get("dataset") != _entry.get("dataset") , self.ZFS_LOCAL_SNAPSHOTS)
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)
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if len(_copys) > 0:
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_entry["copy"] = ",".join(["{0}".format(_x.get("dataset")) for _x in _copys])
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else:
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if self.backup:
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continue
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_exist_entry = self.ZFS_RESULT_SNAPSHOT.get(_dataset)
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if _exist_entry:
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_entry["count"] += _exist_entry.get("count") ## update counter
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if _exist_entry.get("creation") <= _entry.get("creation"): ## newer
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_exist_entry.update(_entry)
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else:
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_exist_entry["count"] = _entry["count"]
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else:
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self.ZFS_RESULT_SNAPSHOT[_dataset] = _entry
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return list(self.ZFS_RESULT_SNAPSHOT.values())
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def _parse(self,data):
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_ret = [] ## Fixme
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for _match in self.ZFSLIST_REGEX.finditer(data):
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#yield _match.groupdict()
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_ret.append(_match.groupdict())
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return _ret
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def _call_proc(self,remote=None):
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zfs_args = ["zfs", "list",
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"-t", "all", ## list snapshots / TODO:all
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"-Hp", ## script und numeric output
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"-o", "name,creation,guid,used,referenced", ## attributes to show
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"-r" ## recursive
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]
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if remote:
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_privkeyoption = []
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if self.ssh_identity:
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_privkeyoption = ["-i",self.ssh_identity]
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_sshoptions = "BatchMode yes"
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_parts = remote.split(":")
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_port = "22" ## default port
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if len(_parts) > 1:
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remote = _parts[0]
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_port = _parts[1]
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zfs_args = ["ssh",
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remote, ## Hostname
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"-p", _port,
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"-o", _sshoptions, ## ssh options
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] + _privkeyoption + zfs_args
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_proc = subprocess.Popen(zfs_args,stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=False)
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_stdout, _stderr = _proc.communicate()
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if _proc.returncode > 0:
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raise Exception(_stderr.decode(sys.stdout.encoding)) ## Raise Errorlevel with Error from proc
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return _stdout.decode(sys.stdout.encoding)
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def convert_ts_date(self,ts):
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return time.strftime(self.DATEFORMAT,time.localtime(ts))
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def check_threshold(self,age):
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if not self.threshold:
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return "ok"
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age /= 60 ## default in minuten
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#print("Age: {0} - {1} - {2}".format(age,list(zip(self.threshold,("warn","crit"))),list(filter(lambda y: y[0] < age,zip(self.threshold,("warn","crit"))))))
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_status = list(
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map(lambda x: x[1], ## return only last
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filter(lambda y: y[0] < age, ## check threshold Texte
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zip(self.threshold,("warn","crit"))
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)
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)
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)
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if not _status:
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_status = ["ok"]
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return _status[-1]
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@staticmethod
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def format_bytes(size,unit='B'):
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# 2**10 = 1024
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size = float(size)
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if size == 0:
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return "0"
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power = 2**10
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n = 0
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power_labels = {0 : '', 1: 'K', 2: 'M', 3: 'G', 4: 'T'}
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while size > power:
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size /= power
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n += 1
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return "{0:.2f} {1}{2}".format(size, power_labels[n],unit)
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@staticmethod
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def seconds2timespan(seconds,details=2,seperator=" ",template="{0:.0f}{1}",fixedview=False):
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_periods = (
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('W', 604800),
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('T', 86400),
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('Std', 3600),
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('Min', 60),
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('Sek', 1)
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)
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_ret = []
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for _name, _period in _periods:
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_val = seconds//_period
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if _val:
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seconds -= _val * _period
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#if _val == 1:
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# _name = _name[:-1]
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_ret.append(template.format(_val,_name))
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else:
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if fixedview:
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_ret.append("")
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return seperator.join(_ret[:details])
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def _datasort(self,data):
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if not self.sort:
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return data
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return sorted(data, key=lambda k: k[self.sort],reverse=self.sortreverse)
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def checkmk_output(self,data):
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if not data:
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return
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print ("<<<checkzfs>>>")
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for _item in data:
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print("<<{0}>>".format(_item.get("dataset","").replace(" ","_")))
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for _info,_val in _item.items():
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print("{0}: {1}".format(_info,_val))
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def table_output(self,data):
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if not data:
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return
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_header = data[0].keys() if not self.columns else self.columns
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_header_names = [self.COLUMN_NAMES.get(i,i) for i in _header]
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_converter = dict((i,self.COLUMN_MAPPER.get(i,(lambda x: str(x)))) for i in _header)
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_output_data = [_header_names]
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_line_status = []
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for _item in self._datasort(data):
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_line_status.append(_item.get("status"))
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_output_data.append([_converter.get(_col)(_item.get(_col,"")) for _col in _header])
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_maxwidth = [max(map(len,_col)) for _col in zip(*_output_data)] ## max column breite
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_format = " ║ ".join(["{{:{}{}}}".format(self.COLUMN_ALIGN.get(_h,">"),_w) for _h,_w in zip(_header,_maxwidth)]) ## format bilden
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_line_print = False
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_out = []
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_status = "ok"
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for _item in _output_data:
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if _line_print:
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_status = _line_status.pop(0)
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if _status != "ok":
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_out.append(self.COLOR_CONSOLE.get(_status,"") + _format.format(*_item) + self.COLOR_CONSOLE.get("reset"))
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else:
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_out.append(_format.format(*_item))
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if not _line_print:
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_out.append("═╬═".join(map(lambda x: x*"═",_maxwidth))) ## trennlinie
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_line_print = True
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return "\n".join(_out)
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def html_output(self,data):
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if not data:
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return
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_header = data[0].keys() if not self.columns else self.columns
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_header_names = [self.COLUMN_NAMES.get(i,i) for i in _header]
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_converter = dict((i,self.COLUMN_MAPPER.get(i,(lambda x: str(x)))) for i in _header)
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_out = []
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_out.append("<html><head>")
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_out.append("<style type='text/css'>.warn { background-color: yellow } .crit { background-color: red}</style>")
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_out.append("<title>ZFS</title></head>")
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_out.append("<body><table border=1>")
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_out.append("<tr><th>{0}</th></tr>".format("</th><th>".join(_header_names)))
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for _item in self._datasort(data):
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_out.append("<tr class='{1}'><td>{0}</td></tr>".format("</td><td>".join([_converter.get(_col)(_item.get(_col,"")) for _col in _header]),_item.get("status","ok")))
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_out.append("</table></body></html>")
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return "".join(_out)
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def mail_output(self,data):
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_msg = EmailMessage()
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self.hostname = socket.getfqdn()
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_msg.set_content(self.checkmk_output)
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_msg.add_alternative(self.html_output(data),subtype="html")
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_msg["From"] = "ZFS-Checkscript on {0} <root@{0}".format(self.hostname)
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_msg["To"] = "root@{0}".format(self.hostname)
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_msg["Content-Type"]
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_msg["Subject"] = "ZFS-Check {0}".format(self.hostname.split(".")[0])
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subprocess.run(["/usr/sbin/sendmail","-t","-oi"], input=_msg.as_bytes())
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def json_output(self,data):
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return json.dumps(data)
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if __name__ == "__main__":
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import argparse
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_parser = argparse.ArgumentParser("Tool to check ZFS Replication age\n##########################################\n")
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_parser.add_argument('--remote',type=str,
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help="SSH Connection Data user@host")
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_parser.add_argument("--filter",type=str,
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help="Regex Filter only Snapshots")
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_parser.add_argument("--pool",type=str,
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help="Regex Filter only Pool")
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_parser.add_argument("--output",type=str,default="text",choices=["html","text","mail","checkmk","json"],
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help="Ausgabeformat")
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_parser.add_argument("--columns",type=str,
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help="Show only Columns")
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_parser.add_argument("--sort",type=str,choices=zfscheck.VALIDCOLUMNS,
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help="Sort by Column")
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_parser.add_argument("--threshold",type=str,
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help="Add Warn/Crit times in minutes")
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_parser.add_argument("--backup",action="store_true",
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help="search backups only")
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_parser.add_argument("--rawdata",action="store_true",
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help="show times/bytes unconverted")
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_parser.add_argument("--ssh-identity",type=str,
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help="Path to ssh private key to use")
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_parser.add_argument("--ssh-extra-option",type=str,
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help="additional ssh -o ... options")
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args = _parser.parse_args()
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zfscheck(**args.__dict__)
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