evolinux-base: Add check_hpraid.sh

This script is meant to be executed as a cron by executing Nagios
NRPE plugin check_hpraid and notify by mail any errors

evolinux-base/files/check_hpraid.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# This script is meant to be executed as a cron by executing Nagios 
+# NRPE plugin check_hpraid and notify by mail any errors
+
+TMPDIR=/tmp
+md5sum=$(command -v md5sum)
+awk=$(command -v awk)
+check_hpraid="/usr/local/lib/nagios/plugins/check_hpraid -v"
+check_hpraid_output=$(mktemp -p $TMPDIR check_hpraid_XXX)
+check_hpraid_last="$TMPDIR/check_hpraid_last"
+trap trapFunc EXIT ERR
+
+testDeps() {
+    
+    test -x "$md5sum" || (echo "md5sum binary not found"; exit 1)
+    test -x "$awk" || (echo "awk binary not found"; exit 1)
+}
+
+main() {
+    
+    if ! $check_hpraid > "$check_hpraid_output"; then
+        error=true
+    else
+        error=false
+    fi
+    if [ ! -f $check_hpraid_last ]; then
+        cp "$check_hpraid_output" $check_hpraid_last
+    fi
+    
+    # If output and last check is different, display differences and 
+    # exit
+    md5_now=$(md5sum "$check_hpraid_output" | awk '{print $1}')
+    md5_last=$(md5sum $check_hpraid_last | awk '{print $1}')
+    if [[ "$md5_now" != "$md5_last" ]]; then
+        cat << EOT
+        Different RAID state detected.
+        Was:
+        $check_hpraid_last
+        Is now:
+        $check_hpraid_output
+EOT
+    exit 1
+    fi
+    
+    # If check_hpraid returned error, display output, save status and 
+    # exit
+    if $error; then
+        cp "$check_hpraid_output" $check_hpraid_last
+        cat "$check_hpraid_output"
+        exit 1
+    else
+        exit 0
+    fi
+}
+
+trapFunc() {
+    
+    rm "$check_hpraid_output"
+}
+
+testDeps
+main