Add --inode-mode option

CHANGELOG.md

@@ -7,6 +7,11 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
 
+## [0.6.0] - 2021-04-16
+
+### Added
+- Added --inode-mode option to monitore inode information instead of block usage (df -i)
+
 ## [0.4.2] - 2021-03-31
 
 ### Changed

README.md

@@ -45,6 +45,7 @@ Flags:
   -p, --include-pseudo-fs         Include pseudo-filesystems (e.g. tmpfs) (default false)
   -r, --include-read-only         Include read-only filesystems (default false)
   -f, --fail-on-error             Fail and exit on errors getting file system usage (e.g. permission denied) (default false)
+  -j, --inode-mode                Inode mode, check usage of inode (default false)
   -h, --help                      help for check-disk-usage
 
 Use "check-disk-usage [command] --help" for more information about a command.
@@ -75,6 +76,7 @@ error, such as `permission denied` for a file system.  If true, the check will
 exit with as a critical failure and provide the error message.  If false (the
 defaut), it will specify unknown for that file system, provide the error and
 continue to check the remaining file systems as expected.
+* The `--inode-mode` option check inode information instead of block usage
 
 ## Configuration
 

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"strings"
+    "strconv"
 
 	human "github.com/dustin/go-humanize"
 	"github.com/sensu-community/sensu-plugin-sdk/sensu"
@@ -22,6 +23,7 @@ type Config struct {
 	IncludePseudo   bool
 	IncludeReadOnly bool
 	FailOnError     bool
+    InodeMode       bool
 }
 
 var (
@@ -115,6 +117,16 @@ var (
 			Usage:     "Include read-only filesystems (default false)",
 			Value:     &plugin.IncludeReadOnly,
 		},
+		{
+			Path:      "inode-mode",
+			Env:       "",
+			Argument:  "inode-mode",
+			Shorthand: "j",
+			Default:   false,
+			Usage:     "Inode mode, check usage of inode (default false)",
+			Value:     &plugin.InodeMode,
+		},
+
 	}
 )
 
@@ -178,19 +190,37 @@ func executeCheck(event *types.Event) (int, error) {
 			continue
 		}
 
-		// implement magic factor for larger file systems?
-		fmt.Printf("%s ", plugin.PluginConfig.Name)
-		if s.UsedPercent >= plugin.Critical {
-			criticals++
-			fmt.Printf("CRITICAL: ")
-		} else if s.UsedPercent >= plugin.Warning {
-			warnings++
-			fmt.Printf(" WARNING: ")
+        if plugin.InodeMode {
+
+			// implement magic factor for larger file systems?
+			fmt.Printf("%s ", plugin.PluginConfig.Name)
+			if s.InodesUsedPercent >= plugin.Critical {
+				criticals++
+				fmt.Printf("CRITICAL: ")
+			} else if s.InodesUsedPercent >= plugin.Warning {
+				warnings++
+				fmt.Printf(" WARNING: ")
+			} else {
+				fmt.Printf("      OK: ")
+			}
+			fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.InodesUsedPercent, strconv.FormatUint(s.InodesTotal, 10), strconv.FormatUint(s.InodesUsed, 10), strconv.FormatUint(s.InodesFree, 10))
 		} else {
-			fmt.Printf("      OK: ")
+
+			// implement magic factor for larger file systems?
+			fmt.Printf("%s ", plugin.PluginConfig.Name)
+			if s.UsedPercent >= plugin.Critical {
+				criticals++
+				fmt.Printf("CRITICAL: ")
+			} else if s.UsedPercent >= plugin.Warning {
+				warnings++
+				fmt.Printf(" WARNING: ")
+			} else {
+				fmt.Printf("      OK: ")
+			}
+			fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.UsedPercent, human.Bytes(s.Total), human.Bytes(s.Used), human.Bytes(s.Free))
 		}
-		fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.UsedPercent, human.Bytes(s.Total), human.Bytes(s.Used), human.Bytes(s.Free))
-	}
+
+    }
 
 	if criticals > 0 {
 		return sensu.CheckStateCritical, nil