Integrate also nagios-based monitoring here

1 files changed, 125 insertions, 0 deletions

diff --git a/lib/nagios/nagios.sh b/lib/nagios/nagios.sh
new file mode 100755
index 0000000..40631c1
--- /dev/null
+++ b/lib/nagios/nagios.sh
@@ -0,0 +1,125 @@
+cd $(dirname "$0")
+
+. setup/parameters.sh
+
+function nagios_find_host {
+    echo "$@" | grep -oP '\-H\s*\K[^\s]*'
+}
+
+function find_host_param {
+    local id="$1" && shift
+    local pname="$1" && shift
+    local defval="$1" && shift
+
+    local val=$(cat setup/${pname}.txt  | grep -P "^$id" | awk '{ print $2 }')
+    [ -n "$val" ] || val="$defval"
+
+    echo -n "$val"
+}
+
+function nagios_find_host_param {
+    local pname="$1" && shift
+    local defval="$1" && shift
+    local host=$(nagios_find_host "$@")
+
+    find_host_param "$host" "$pname" "$defval"
+}
+
+function resolve_fqdn {
+    local host="$1" && shift
+
+    if [[ ! $host =~ \. ]]; then
+	local domain=$(find_host_param "$host" domains "$default_domain")
+	host+=".$domain"
+    fi
+
+    echo -n $host
+}
+
+function resolve_ip {
+    local host="$1" && shift
+
+    if [[ ! "$host" =~ ^[[:digit:]] ]]; then
+	local fqdn=$(resolve_fqdn "$host")
+	host=$(dig +short "$fqdn" A | head -n 1 | tr -d '\n')
+	if [ $? -ne 0 -o -z "$host" ]; then
+	    echo "DNS resolution for host ($fqdn) failed: $(dig +short "$fqdn" A 2>&1)"
+	    exit 2
+	fi
+    fi
+
+    echo -n "$host"
+}
+
+function nagios_run {
+    if [[ "$1" =~ ^- ]]; then
+	cmd=${nagios_plugins}/$(basename $0)
+    else
+	cmd=$1 && shift
+	[[ "$cmd" =~ ^/ ]] || cmd="${nagios_plugins}/$cmd"
+    fi
+
+    ARGS=""
+    while [[ $# -gt 0 ]]; do
+	key="$1" && shift
+    
+	case "$key" in 
+          -H)
+	    host="$1" && shift
+	    ip=$(resolve_ip "$host")
+	    if [ $? -eq 0 -a -n "$ip" ]; then
+		ARGS+=" ${key} $ip"
+	    else
+		echo "$ip"
+		exit $?
+	    fi
+	    ;;
+          *)
+	    ARGS+=" $key"
+	esac
+    done
+
+    [ -n "$debug" ] && echo "$(date) $cmd" "$ARGS" >> /tmp/nagios.log
+    eval "$cmd" "$ARGS"
+}
+
+function nagios_parse {
+    cmd="$1"; shift
+
+    output=$($cmd "$@")
+    exit_code=$?
+
+    if [ $exit_code -eq 0 ]; then
+	last_line=$(echo "$output" | tail -1)
+
+	status=$(echo $last_line | cut -d ' ' -f 1)
+	[[ "$status" =~ ^[0-9]$ ]] || status=0
+	echo -n ${last_line#$status}
+    else 
+	status=0
+    fi
+
+    if [ $status -ne 1 ]; then 
+	echo -n " -- "
+
+	lines=$(echo "$output" | sed '/^[[:space:]]*$/d' | wc -l)
+	if [ $lines -gt 1 ]; then
+	    echo "$output" | sed '/^[[:space:]]*$/d' | head -n 1 | tr -d '\n'
+	    echo " ... "
+	    echo "------------------"
+	    echo "$output" | head -n -1
+	else
+	    echo "$output" | sed '/^[[:space:]]*$/d' | head -n -1
+	fi
+    else
+	echo
+    fi
+
+    if [ "$status" -eq 0 ]; then
+	exit "2"
+    elif [ "$status" -eq 1 ]; then
+	exit "0"
+    else
+	exit "1"
+    fi
+}