構成

Ubuntu 15.04

設定方法

logの設定

/etc/rsyslog.d/50-default.conf

L.38 ~

- #*.=info;*.=notice;*.=warn;\
- #       auth,authpriv.none;\
- #       cron,daemon.none;\
- #       mail,news.none          -/var/log/messages
+  *.=info;*.=notice;*.=warn;\
+         auth,authpriv.none;\
+         cron,daemon.none;\
+         mail,news.none          -/var/log/messages

設定の反映

cmd

# /etc/init.d/rsyslog restart

Playbookを晒す

上記だけだと寂しいので、AnsibleのPlaybookでも置いておきます。

version

$ ansible --version
ansible 1.9.3

playbook

roles/common/
├── handlers
│   └── main.yml
├── tasks
│   └── main.yml
└── templates
    └── 50-default.conf.j2

roles/common/handlers/main.yml

- name: restart rsyslog
  service: name=rsyslog state=restarted

roles/common/tasks/main.yml

- name: replace rsyslog.conf
  copy: >
    src=roles/common/templates/50-default.conf.j2
    dest=/etc/rsyslog.d/50-default.conf 
  notify: restart rsyslog

roles/common/templates/50-default.conf.j2

#  Default rules for rsyslog.
#
#			For more information see rsyslog.conf(5) and /etc/rsyslog.conf

#
# First some standard log files.  Log by facility.
#
auth,authpriv.*			/var/log/auth.log
*.*;auth,authpriv.none		-/var/log/syslog
# cron.*				/var/log/cron.log
# daemon.*			-/var/log/daemon.log
kern.*				-/var/log/kern.log
# lpr.*				-/var/log/lpr.log
mail.*				-/var/log/mail.log
# user.*				-/var/log/user.log

#
# Logging for the mail system.  Split it up so that
# it is easy to write scripts to parse these files.
#
# mail.info			-/var/log/mail.info
# mail.warn			-/var/log/mail.warn
mail.err			/var/log/mail.err

#
# Logging for INN news system.
#
news.crit			/var/log/news/news.crit
news.err			/var/log/news/news.err
news.notice			-/var/log/news/news.notice

#
# Some "catch-all" log files.
#
# *.=debug;\
#	auth,authpriv.none;\
#	news.none;mail.none	-/var/log/debug
*.=info;*.=notice;*.=warn;\
	auth,authpriv.none;\
	cron,daemon.none;\
	mail,news.none		-/var/log/messages

#
# Emergencies are sent to everybody logged in.
#
*.emerg                                :omusrmsg:*

#
# I like to have messages displayed on the console, but only on a virtual
# console I usually leave idle.
#
# daemon,mail.*;\
#	news.=crit;news.=err;news.=notice;\
#	*.=debug;*.=info;\
#	*.=notice;*.=warn	/dev/tty8

# The named pipe /dev/xconsole is for the `xconsole' utility.  To use it,
# you must invoke `xconsole' with the `-file' option:
# 
#    $ xconsole -file /dev/xconsole [...]
#
# NOTE: adjust the list below, or you'll go crazy if you have a reasonably
#      busy site..
#
daemon.*;mail.*;\
	news.err;\
	*.=debug;*.=info;\
	*.=notice;*.=warn	|/dev/xconsole

追記

過去のバージョンでも設定ファイルは変わらなさそうです。
Ubuntu12.04で/var/log/messagesを生成する