From f7940cf53a341e1683c8669687e8b43cd38c984d Mon Sep 17 00:00:00 2001
From: "Hahn Axel (hahn)" <axel.hahn@iml.unibe.ch>
Date: Fri, 26 Mar 2021 11:24:37 +0100
Subject: [PATCH] add filesystem checks check_fs_errors and check_fs_writable
---
check_cpu.md | 48 ++++++++++++++++++++++++
check_fs_errors | 83 ++++++++++++++++++++++++++++++++++++++++
check_fs_writable | 96 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 227 insertions(+)
create mode 100644 check_cpu.md
create mode 100755 check_fs_errors
create mode 100755 check_fs_writable
diff --git a/check_cpu.md b/check_cpu.md
new file mode 100644
index 0000000..5396dea
--- /dev/null
+++ b/check_cpu.md
@@ -0,0 +1,48 @@
+# IML Checks for Icinga / Nagios
+
+[Home](readme.md)
+
+---
+
+## check CPU
+
+### Introduction
+
+**check_cpu** is a plugin to check cpu usage and cpu io wait.
+It reads cpu data from output of top command and shows
+
+ hwi - Time spent handling hardware interrupt routines. (Whenever a peripheral unit want attention form the CPU, it literally pulls a line, to signal the CPU to service it)
+ swi - Time spent handling software interrupt routines. (a piece of code, calls an interrupt routine...)
+ st - Time spent on involuntary waits by virtual cpu while hypervisor is servicing another processor (stolen from a virtual machine)
+
+ nice - Time spent running niced user processes (User defined priority)
+ wait - Time spent on waiting on IO peripherals (eg. disk)
+
+system - Time spent in kernel space
+ user - Time spent in user space
+ idle - Time spent in idle operations
+
+For all values it sends performance data.
+
+### Syntax
+
+``$ check_NAME [-c CRITICAL] [-w WARING] [-i CRITICAL_IO]``
+
+#### Parameters
+
+```text
+ -w VALUE cpu usage warning level (default: 75)
+ -c VALUE cpu usage critical level (default: 90)
+
+ -i VALUE io wait critical level (default: 50)
+
+ -h or --help show this help.
+
+```
+
+# Examples
+
+``check_cpu -w 60 -c 80 -i 40``
+ check cpu usage.
+ It shows a warning if usage is higer 60%.
+ It shows critical status if usage is higer 80% or io wait is 40%
diff --git a/check_fs_errors b/check_fs_errors
new file mode 100755
index 0000000..7f96088
--- /dev/null
+++ b/check_fs_errors
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+# ======================================================================
+#
+# Check filesystem errors
+#
+#
+# requirements:
+# - sudo permission on /bin/journalctl
+#
+# ----------------------------------------------------------------------
+# 2021-03-23 v0.0 <axel.hahn@iml.unibe.ch>
+# ======================================================================
+
+
+. `dirname $0`/inc_pluginfunctions
+
+
+# ----------------------------------------------------------------------
+# functions
+# ----------------------------------------------------------------------
+
+function showHelp(){
+cat <<EOF
+______________________________________________________________________
+
+CHECK_FS_ERRORS check if kernel logs inconsistency messages
+
+(c) Institute for Medical Education - Univerity of Bern
+Licence: GNU GPL 3
+______________________________________________________________________
+
+
+SYNTAX:
+`basename $0` [-h]
+
+OPTIONS:
+
+ -h or --help show this help.
+
+PARAMETERS:
+
+ none
+
+EXAMPLE:
+`basename $0`
+
+EOF
+}
+# ----------------------------------------------------------------------
+# MAIN
+# ----------------------------------------------------------------------
+
+# --- check required tools
+# ph.require bc top
+
+
+# --- check param -h
+case "$1" in
+ "--help"|"-h")
+ showHelp
+ exit 0
+ ;;
+ *)
+esac
+
+
+# ----- MAKE CHECK
+
+out=$( sudo /bin/journalctl | grep 'kernel: ' | grep -v 'check_fs_errors' | grep -E '(error|fail)' | grep 'inconsistent' )
+test ! -z "$out" && ph.setStatus "critical"
+
+
+# ----- OUTPUT
+
+ph.status "check if kernel logs inconsistency messages"
+echo $out
+
+
+# ----- CLEANUP AND BYE!
+
+ph.exit
+
+# ----------------------------------------------------------------------
diff --git a/check_fs_writable b/check_fs_writable
new file mode 100755
index 0000000..544ed3d
--- /dev/null
+++ b/check_fs_writable
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+# ======================================================================
+#
+# Check filesystem ... is it readonly?
+#
+# requirements:
+# - none
+#
+# ----------------------------------------------------------------------
+# 2021-03-23 v0.0 <axel.hahn@iml.unibe.ch>
+# ======================================================================
+
+
+. `dirname $0`/inc_pluginfunctions
+
+dirs2test="/tmp /var/tmp"
+out=""
+
+# ----------------------------------------------------------------------
+# functions
+# ----------------------------------------------------------------------
+
+function showHelp(){
+cat <<EOF
+______________________________________________________________________
+
+CHECK_FS_READONLY check if filesystem is readonly - v0.0
+
+(c) Institute for Medical Education - Univerity of Bern
+Licence: GNU GPL 3
+______________________________________________________________________
+
+
+SYNTAX:
+`basename $0` [directory [more directories]]
+
+OPTIONS:
+
+ -h or --help show this help.
+
+PARAMETERS:
+
+ DIRECTORY where to touch a temporary file
+
+EXAMPLE:
+`basename $0` /tmp /root /var/www
+
+EOF
+}
+# ----------------------------------------------------------------------
+# MAIN
+# ----------------------------------------------------------------------
+
+# --- check required tools
+# ph.require bc top
+
+
+# --- check param -h
+case "$1" in
+ "--help"|"-h")
+ showHelp
+ exit 0
+ ;;
+ *)
+esac
+
+# params are directory names ... if a param was given it overrides the internal default
+test $# -gt 0 && dirs2test="$*"
+
+
+# ----- MAKE CHECK
+
+for mydir in $dirs2test
+do
+ touchfile=$mydir/icinga_touch_testfile__${RANDOM}_${RANDOM}
+ out="$out
+
+--- touching something into $mydir
+ $( touch $touchfile && ls -l $touchfile && rm -f $touchfile 2>&1 )"
+ if [ $? -ne 0 ]; then
+ ph.setStatus "critical"
+ fi
+done
+
+
+# ----- OUTPUT
+
+ph.status "check if filesystem is writable in $dirs2test $out"
+#echo "$out"
+
+
+# ----- CLEANUP AND BYE!
+
+ph.exit
+
+# ----------------------------------------------------------------------
--
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