ServersMan@VPS:Muninの監視項目を増やす【unbound編】

Muninは、デフォルトの監視項目以外に「プラグイン」で監視したい項目を増やすことができます。代表的なモジュール「unbound」を監視項目に追加してみます。(2015/05/24作成)

caro_oe92 / Pixabay

1.ダウンロード&展開

unbound の「munin plugin」は、unbound のソースパッケージの中に含まれています。unbound のソースをダウンロードして、プラグラインを取り出します。

http://unbound.net/download.html

[crayon]
$ wget http://unbound.net/downloads/unbound-1.5.3.tar.gz
$ tar zxvf unbound-1.5.3.tar.gz unbound-1.5.3/contrib/unbound_munin_
$ cd unbound-1.5.3/contrib
$ sudo cp unbound_munin_ /usr/share/munin/plugins/
$ sudo chown root:root /usr/share/munin/plugins/unbound_munin_
$ sudo chmod 755 /usr/share/munin/plugins/unbound_munin_
[/crayon]

2.unbound.conf ファイルを修正

[crayon]
$ sudo v /etc/unbound/unbound.conf

server:
statistics-interval: 0
extended-statistics: yes
statistics-cumulative: no

remote-control:
control-enable: yes
control-interface: 127.0.0.1
[/crayon]

3.unbound-control で通信用に利用する鍵の作成

[crayon]
$ sudo /usr/sbin/unbound-control-setup
setup in directory /etc/unbound
unbound_server.key exists
unbound_control.key exists
create unbound_server.pem (self signed certificate)
create unbound_control.pem (signed client certificate)
Signature ok
subject=/CN=unbound-control
Getting CA Private Key
Setup success. Certificates created. Enable in unbound.conf file to use
[/crayon]

4.unbound plugin 設定の追加

[crayon]
$ sudo vi /etc/munin/plugin-conf.d/munin-node

[unbound*]
user root
env.statefile /var/lib/munin-node/plugin-state/munin/unbound-state
env.unbound_conf /etc/unbound/unbound.conf
env.unbound_control /usr/sbin/unbound-control
env.spoof_warn 1000
env.spoof_crit 100000
[/crayon]

5.munin-node へ unbound plugin を登録

[crayon]
(下記の対策)
/etc/munin/plugins/unbound_munin_queue: line 153: /var/lib/munin-node/plugin-state/munin/unbound-state.lock: No such file or directory

$ sudo mkdir /var/lib/munin-node/plugin-state/munin

$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_by_class
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_by_flags
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_by_opcode
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_by_rcode
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_by_type
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_histogram
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_hits
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_memory
$ sudo ln -s /usr/share/munin/plugins/unbound_munin_ /etc/munin/plugins/unbound_munin_queue
[/crayon]

6.動作確認

[crayon]
$ sudo /usr/sbin/munin-run –debug unbound_munin_queue
# Processing plugin configuration from /etc/munin/plugin-conf.d/amavis
# Processing plugin configuration from /etc/munin/plugin-conf.d/df
# Processing plugin configuration from /etc/munin/plugin-conf.d/fw_
# Processing plugin configuration from /etc/munin/plugin-conf.d/hddtemp_smartctl
# Processing plugin configuration from /etc/munin/plugin-conf.d/munin-node
# Processing plugin configuration from /etc/munin/plugin-conf.d/postfix
# Processing plugin configuration from /etc/munin/plugin-conf.d/sendmail
# Setting /rgid/ruid/ to /99/0/
# Setting /egid/euid/ to /99 99/0/
# Setting up environment
# Environment unbound_conf = /etc/unbound/unbound.conf
# Environment unbound_control = /usr/sbin/unbound-control
# Environment spoof_warn = 1000
# Environment spoof_crit = 100000
# Environment statefile = /var/lib/munin-node/plugin-state/munin/unbound-state
# About to run ‘/etc/munin/plugins/unbound_munin_queue’
t_ql_avg.value 0
t_ql_max.value 0
t_ql_overwritten.value 0
t_ql_exceeded.value 0
[/crayon]

7.設定反映

[crayon]
$ sudo /etc/init.d/unbound restart
$ sudo /etc/init.d/munin-node restart
[/crayon]

以上

About yoshimasa

埼玉県さいたま市在住、2男3女のパパです。Linux系の技術情報を中心にまとめています。1978年2月生まれ。

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