From bb8cdaf9dd25372bbbd09d916e9afe7f907ec1d6 Mon Sep 17 00:00:00 2001
From: "Costa Tsaousis (ktsaou)" <costa@tsaousis.gr>
Date: Thu, 9 Jun 2016 22:49:44 +0300
Subject: properly handle the exit status of plugins to avoid infinite restart
 attempts; plugins that report failure are now restarted up to 10 times if
 they have collected values in the past; apache fixed to work with latest
 apache; example plugin is now disabled by default to prevent starting bash in
 systems that dont have any other bash plugin used

---
 charts.d/apache.chart.sh  | 23 ++++++++++-------------
 charts.d/example.chart.sh |  7 +++++++
 2 files changed, 17 insertions(+), 13 deletions(-)

(limited to 'charts.d')

diff --git a/charts.d/apache.chart.sh b/charts.d/apache.chart.sh
index f4f7d0581b..a3e064094c 100755
--- a/charts.d/apache.chart.sh
+++ b/charts.d/apache.chart.sh
@@ -67,19 +67,14 @@ apache_detect() {
 
 	# we will not check of the Conns*
 	# keys, since these are apache 2.4 specific
-	if [ -z "${apache_key_accesses}" \
-		-o -z "${apache_key_kbytes}" \
-		-o -z "${apache_key_reqpersec}" \
-		-o -z "${apache_key_bytespersec}" \
-		-o -z "${apache_key_bytesperreq}" \
-		-o -z "${apache_key_busyworkers}" \
-		-o -z "${apache_key_idleworkers}" \
-		-o -z "${apache_key_scoreboard}" \
-		]
-		then
-		echo >&2 "apache: Invalid response or missing keys from apache server: ${*}"
-		return 1
-	fi
+	[ -z "${apache_key_accesses}"    ] && echo >&2 "apache: missing 'Total Accesses' from apache server: ${*}" && return 1
+	[ -z "${apache_key_kbytes}"      ] && echo >&2 "apache: missing 'Total kBytes' from apache server: ${*}" && return 1
+	[ -z "${apache_key_reqpersec}"   ] && echo >&2 "apache: missing 'ReqPerSec' from apache server: ${*}" && return 1
+	[ -z "${apache_key_bytespersec}" ] && echo >&2 "apache: missing 'BytesPerSec' from apache server: ${*}" && return 1
+	[ -z "${apache_key_bytesperreq}" ] && echo >&2 "apache: missing 'BytesPerReq' from apache server: ${*}" && return 1
+	[ -z "${apache_key_busyworkers}" ] && echo >&2 "apache: missing 'BusyWorkers' from apache server: ${*}" && return 1
+	[ -z "${apache_key_idleworkers}" ] && echo >&2 "apache: missing 'IdleWorkers' from apache server: ${*}" && return 1
+	[ -z "${apache_key_scoreboard}"  ] && echo >&2 "apache: missing 'Scoreboard' from apache server: ${*}" && return 1
 
 	if [ ! -z "${apache_key_connstotal}" \
 		-a ! -z "${apache_key_connsasyncwriting}" \
@@ -88,6 +83,8 @@ apache_detect() {
 		]
 		then
 		apache_has_conns=1
+	else
+		apache_has_conns=0
 	fi
 
 	return 0
diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh
index ad20504621..b20740e862 100755
--- a/charts.d/example.chart.sh
+++ b/charts.d/example.chart.sh
@@ -7,14 +7,21 @@
 # between the calls of the _update() function
 example_update_every=
 
+# the priority is used to sort the charts on the dashboard
+# 1 = the first chart
 example_priority=150000
 
+# to enable this chart, you have to set this to 12345
+# (just a demonstration for something that needs to be checked)
+example_magic_number=
+
 # _check is called once, to find out if this chart should be enabled or not
 example_check() {
 	# this should return:
 	#  - 0 to enable the chart
 	#  - 1 to disable the chart
 
+	[ "${example_magic_number}" != "12345" ] && return 1
 	return 0
 }
 
-- 
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