Initial commit.

README.md

@@ -1 +1,13 @@
 # check_mk-mysql_open_files
+
+This check will monitor mysql open_files value raported to
+setted open_files_limit value. The plugin must be copied
+into /usr/lib/check_mk_agent/plugins folder and the
+executable bit must be set for this file.
+
+The check will return current open_files_limit and open_files
+values. The check gets critical at 90 percent of
+open_files_limit and warning at 80.
+ 
+Both limits are definable in Wato under "Parameters for
+Inventorized Checks", "Applications, Processes & Services".

agents/plugins/mysql_open_files

@@ -0,0 +1,16 @@
+#!/bin/bash
+# SpearHead Systems george.mocanu@sphs.ro 2015
+# Check_MK plugin for monitoring mysql open_files
+
+# Get mysqld pid number
+mysqlPid=`pidof mysqld`
+
+# Count files currently opened by mysql 
+mysqlOpenFiles=`ls -las /proc/$mysqlPid/fd/ | wc -l`
+
+# Get current open_files_limit value
+mysqlOpenFilesLimit=`cat /proc/$mysqlPid/limits | grep 'Max\ open\ files' | awk '{print $4}'`
+
+# Check output
+echo '<<<mysql_open_files>>>'
+echo 'open_files ' $mysqlOpenFilesLimit ' ' $mysqlOpenFiles

checkman/mysql_open_files

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+title: Check for monitor mysql open_files
+agents: linux
+catalog: os/linux
+license: GPL
+distribution:
+description:
+ This check will monitor mysql open_files raported to
+ setted open_files_limit value. The plugin must be copied
+ into /usr/lib/check_mk_agent/plugins folder and the 
+ executable bit mus be set for this file.
+ Will return current open_files_limit and open_files
+ values. The check gets critical at 90 percent of 
+ open_files_limit and warning at 80. 
+ Both limits are definable in Wato under "Parameters for 
+ Inventorized Checks", "Applications, Processes & Services".
+
+inventory:
+ One service will be created for each host running the plugin.
+
+perfdata:
+ Percent usage of open_files_limit value.

checks/mysql_open_files

@@ -0,0 +1,47 @@
+#!/usr/bin/python
+# SpearHead Systems george.mocanu@sphs.ro 2015
+
+# EXAMPLE DATA FROM:
+# fomat: "open_files" current_setted_value_of_open_files_limit  current_value_of_open_files
+#
+#<<<mysql_open_files>>>
+#open_files 3000 2305
+
+factory_settings["mysql_open_files_default_values"] = {
+        "levels": (80, 90),
+}
+
+def inventory_mysql_open_files(info):
+    inventory = []
+    for line in info:
+        checkName = line[0]
+        inventory.append( (checkName, {} ) )
+    return inventory
+
+
+def check_mysql_open_files(item, params, info):
+    if type(params) != dict:
+        params = { "levels": params }
+    warn, crit = params["levels"]
+    for line in info:
+        if line[0] == item:
+            open_files_limit = int(line[1])
+            open_files = int(line[2])
+            openPerc = int(((open_files*100)/open_files_limit))
+            perfdata = [ ( "open_files", openPerc, warn, crit ) ]
+            if openPerc > crit:
+                return (2, "Open files use level: %d percents. %d files opened out of maximum %d cconfigured." %(openPerc, open_files, open_files_limit), perfdata)
+            elif openPerc > warn:
+                return (1, "Open files use level: %d percents. %d files opened out of maximum %d cconfigured." %(openPerc, open_files, open_files_limit), perfdata)
+            else:
+                return (0, "Open files use level: %d percents. %d files opened out of maximum %d cconfigured." %(openPerc, open_files, open_files_limit), perfdata)
+    return(3, "Plugin not running on host")
+
+check_info["mysql_open_files"] = {
+    "check_function"            :check_mysql_open_files,
+    "inventory_function"        :inventory_mysql_open_files,
+    "service_description"       :"%s",
+    "default_levels_variable"   :"mysql_open_files_default_values",
+    "has_perfdata"              :True,
+    "group"                     :"mysql_open_files",
+}

info

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+{'author': 'george.mocanu@sphs.ro',
+ 'description': 'Monitor mysql open_files',
+ 'download_url': 'https://github.com/spearheadsys/check_mk-mysql_open_files',
+ 'files': {'agents': ['plugins/mysql_open_files'],
+           'checkman': ['mysql_open_files'],
+           'checks': ['mysql_open_files'],
+           'doc': [],
+           'inventory': [],
+           'notifications': [],
+           'pnp-templates': [],
+           'web': ['plugins/wato/mysql_open_files.py']},
+ 'name': 'mysql_open_files',
+ 'num_files': 4,
+ 'title': 'Check for mysql open_files',
+ 'version': '1.0',
+ 'version.min_required': '1.2.6b5',
+ 'version.packaged': '1.2.6b5'}

web/plugins/wato/mysql_open_files.py

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+#!/usr/bin/python
+# SpearHead Syste  george.mocanu@sphs.ro  2015
+
+register_check_parameters(
+    subgroup_applications,
+    "mysql_open_files",
+    _("Mysql Open Files Usage Status"),
+    Dictionary(
+        elements = [
+            ("levels", # Name of your parameters
+                Tuple(
+                    title = "Levels for Mysql Open Files Usage check", # Specify a title for this parameters
+                    elements = [
+                        Integer(
+                            title = _("Warning if above"),
+                            unit = _("Percent"),
+                            default_value = 80
+                        ),
+                        Integer(
+                            title = _("Critical if above"),
+                            unit = _("Percent"),
+                            default_value = 90
+                        ),
+                    ]
+                )
+            ),
+	],
+        optional_keys = None, # Always show this subgroup
+    ),
+    TextAscii( title = "Service name"),
+    "dict"
+)