一：背景
1.伺服器阿里雲 CentOS
2.Tomcat 8.0.24
3.該外掛透過tomcat的進行監控
二：Tomcat配置

1.tomcat-users.xml配置

點選(此處)摺疊或開啟

<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<tomcat-users xmlns=""
xmlns:xsi=""
xsi:schemaLocation=" tomcat-users.xsd"
version="1.0">
<!--
NOTE: By default, no user is included in the "manager-gui" role required
to operate the "/manager/html" web application. If you wish to use this app,
you must define such a user - the username and password are arbitrary.
-->
<!--
NOTE: The sample user and role entries below are wrapped in a comment
and thus are ignored when reading this file. Do not forget to remove
<!.. ..> that surrounds them.
-->
<!--
<role rolename="tomcat"/>
<role rolename="role1"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat" roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>
-->
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<user username="tomcat" password="tomcat1" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-script,admin-gui"/>
</tomcat-users>

2.開啟tomcat manager應用

三：安裝外掛xmlstarlet

yum install xmlstarlet

四：tomcat監控外掛指令碼 tomcat.chart.sh

1.指令碼存放路徑 /usr/local/netdata/usr/libexec/netdata/charts.d

2.指令碼下載路徑

3.綠色背景標示的地方，是需要根據自己的tomcat進行調整

點選(此處)摺疊或開啟

#!/bin/bash
# Description: Tomcat netdata charts.d plugin
# Author: Jorge Romero
# the URL to download tomcat status info
tomcat_url=""
# _update_every is a special variable - it holds the number of seconds
# between the calls of the _update() function
tomcat_update_every=1
tomcat_priority=60000
# convert tomcat floating point values
# to integer using this multiplier
# this only affects precision - the values
# will be in the proper units
tomcat_decimal_detail=1000000
# used by volume chart to convert bytes to KB
tomcat_decimal_KB_detail=1000
tomcat_check() {
require_cmd xmlstarlet || return 1
tomcat_get
if [ $? -ne 0 ]
then
echo >&2 "tomcat: cannot find stub_status on URL '${tomcat_url}'. Please set tomcat_url=''"
return 1
fi
# this should return:
# - 0 to enable the chart
# - 1 to disable the chart
return 0
}
tomcat_get() {
# Collect tomcat values
mapfile -t lines < <(curl -u tomcatUser:tomcatPassword -Ss "$tomcat_url" |\
xmlstarlet sel \
-t -m "/status/jvm/memory" -v @free \
-n -m "/status/connector[@name='\"http-nio-8080\"']/threadInfo" -v @currentThreadCount \
-n -v @currentThreadsBusy \
-n -m "/status/connector[@name='\"http-nio-8080\"']/requestInfo" -v @requestCount \
-n -v @bytesSent -n -)
tomcat_jvm_freememory="${lines[0]}"
tomcat_threads="${lines[1]}"
tomcat_threads_busy="${lines[2]}"
tomcat_accesses="${lines[3]}"
tomcat_volume="${lines[4]}"
return 0
}
# _create is called once, to create the charts
tomcat_create() {
cat <<EOF
CHART tomcat.accesses '' "tomcat requests" "requests/s" statistics tomcat.accesses area $((tomcat_priority + 8)) $tomcat_update_every
DIMENSION accesses '' incremental
CHART tomcat.volume '' "tomcat volume" "KB/s" volume tomcat.volume area $((tomcat_priority + 5)) $tomcat_update_every
DIMENSION volume '' incremental divisor ${tomcat_decimal_KB_detail}
CHART tomcat.threads '' "tomcat threads" "current threads" statistics tomcat.threads line $((tomcat_priority + 6)) $tomcat_update_every
DIMENSION current '' absolute 1
DIMENSION busy '' absolute 1
CHART tomcat.jvm '' "JVM Free Memory" "MB" statistics tomcat.jvm area $((tomcat_priority + 8)) $tomcat_update_every
DIMENSION jvm '' absolute 1 ${tomcat_decimal_detail}
EOF
return 0
}
# _update is called continiously, to collect the values
tomcat_update() {
local reqs net
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see bellow).
# do all the work to collect / calculate the values
# for each dimension
# remember: KEEP IT SIMPLE AND SHORT
tomcat_get || return 1
# write the result of the work.
cat <<VALUESEOF
BEGIN tomcat.accesses $1
SET accesses = $((tomcat_accesses))
END
BEGIN tomcat.volume $1
SET volume = $((tomcat_volume))
END
BEGIN tomcat.threads $1
SET current = $((tomcat_threads))
SET busy = $((tomcat_threads_busy))
END
BEGIN tomcat.jvm $1
SET jvm = $((tomcat_jvm_freememory))
END
VALUESEOF
return 0
}

五：tomcat監控截圖

Netdata Tomcat執行情況監控外掛

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