From d54058595d6177d98aa8bf730af61b3cd08188c0 Mon Sep 17 00:00:00 2001
From: "Hahn Axel (hahn)" <axel.hahn@iml.unibe.ch>
Date: Thu, 24 Jun 2021 15:37:28 +0200
Subject: [PATCH] mysql: check if query cache is enabled as a shared function
---
check_mysqlserver | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/check_mysqlserver b/check_mysqlserver
index f135b4d..5a9912d 100755
--- a/check_mysqlserver
+++ b/check_mysqlserver
@@ -12,13 +12,19 @@
# - execute check_mysqlserver -i
#
# ----------------------------------------------------------------------
+#
+# for mysql query cache:
+# https://www.techpaste.com/2013/01/query-cache-mysql-server/
+#
+# ----------------------------------------------------------------------
# 2020-08-xx v0.0 <axel.hahn@iml.unibe.ch>
-# 2021-06-08 v0.0 <axel.hahn@iml.unibe.ch> update HOME .. better implement a param and ENV var
+# 2021-06-08 v0.1 <axel.hahn@iml.unibe.ch> update HOME .. better implement a param and ENV var
+# 2021-06-24 v0.2 <axel.hahn@iml.unibe.ch> check if query cache is enabled as a shared function
# ======================================================================
. `dirname $0`/inc_pluginfunctions
-_version="0.1"
+_version="0.2"
# --- set HOME
# HOME=/etc/icinga2-passive-client
@@ -98,6 +104,7 @@ EOF
fi
}
+# show usage
function _usage(){
cat <<EOH
______________________________________________________________________
@@ -178,6 +185,13 @@ function _mysqlrenderdelta() {
test -z $deltaUnit && deltaUnit="sec"
_mysqlrendervar "$1" "$2" $deltaUnit $4
}
+
+# helper function for caching checks
+# The function aborts the check
+function _verify_cache(){
+ _mysqlgetvar "have_query_cache" | grep "YES" >/dev/null || ph.abort "Query cache (have_query_cache) is not active"
+ _mysqlgetvar "query_cache_type" | grep "OFF" >/dev/null && ph.abort "Query cache (have_query_cache) is active but query_cache_type is OFF"
+}
# ----------------------------------------------------------------------
# MAIN
# ----------------------------------------------------------------------
@@ -286,14 +300,14 @@ case "${sMode}" in
"qcache-blocks")
descr="query cache blocks"
- _mysqlgetvar "have_query_cache" | grep "YES" >/dev/null || ph.abort "Query cache is not active"
+ _verify_cache
_mysqlrendervar Qcache_total_blocks "Qcache_"
_mysqlrendervar Qcache_free_blocks "Qcache_"
;;
"qcache-queries")
descr="query cache data"
- _mysqlgetvar "have_query_cache" | grep "YES" >/dev/null || ph.abort "Query cache is not active"
+ _verify_cache
_mysqlrendervar Qcache_queries_in_cache "Qcache_"
_mysqlrenderdelta Qcache_not_cached "Qcache_" min float
_mysqlrenderdelta Qcache_lowmem_prunes "Qcache_" min float
@@ -301,7 +315,7 @@ case "${sMode}" in
"qcache-hits")
descr="query cache hits"
- _mysqlgetvar "have_query_cache" | grep "YES" >/dev/null || ph.abort "Query cache is not active"
+ _verify_cache
_mysqlrenderdelta Qcache_hits "Qcache_" min
_mysqlrenderdelta Qcache_inserts "Qcache_" min
_mysqlrenderdelta Qcache_not_cached "Qcache_" min
--
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