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authorGuilhem Moulin <guilhem@fripost.org>2015-06-10 15:35:13 +0200
committerGuilhem Moulin <guilhem@fripost.org>2015-06-10 18:37:19 +0200
commitb408390ae9311b7d703ce57c25a78dce23c31b16 (patch)
treed9b1c795c0ef8b75dbaef709aa8622863d636942 /roles/munin-master/templates/etc
parenta82e3759627a0612592d853796f2a1137f9189f5 (diff)
Configure munin nodes & master.
Interhost communications are protected by stunnel4. The graphs are only visible on the master itself, and content is generated by Fast CGI.
Diffstat (limited to 'roles/munin-master/templates/etc')
-rw-r--r--roles/munin-master/templates/etc/munin/munin.conf.j2115
-rw-r--r--roles/munin-master/templates/etc/stunnel/munin-master.conf.j262
2 files changed, 177 insertions, 0 deletions
diff --git a/roles/munin-master/templates/etc/munin/munin.conf.j2 b/roles/munin-master/templates/etc/munin/munin.conf.j2
new file mode 100644
index 0000000..8273a83
--- /dev/null
+++ b/roles/munin-master/templates/etc/munin/munin.conf.j2
@@ -0,0 +1,115 @@
+# Example configuration file for Munin, generated by 'make build'
+
+# The next three variables specifies where the location of the RRD
+# databases, the HTML output, logs and the lock/pid files. They all
+# must be writable by the user running munin-cron. They are all
+# defaulted to the values you see here.
+#
+#dbdir /var/lib/munin
+#htmldir /var/cache/munin/www
+#logdir /var/log/munin
+#rundir /var/run/munin
+
+# Where to look for the HTML templates
+#
+#tmpldir /etc/munin/templates
+
+# Where to look for the static www files
+#
+#staticdir /etc/munin/static
+
+# temporary cgi files are here. note that it has to be writable by
+# the cgi user (usually nobody or httpd).
+#
+# cgitmpdir /var/lib/munin/cgi-tmp
+
+# (Exactly one) directory to include all files from.
+includedir /etc/munin/munin-conf.d
+
+# You can choose the time reference for "DERIVE" like graphs, and show
+# "per minute", "per hour" values instead of the default "per second"
+#
+#graph_period second
+
+# Graphics files are generated either via cron or by a CGI process.
+# See http://munin-monitoring.org/wiki/CgiHowto2 for more
+# documentation.
+# Since 2.0, munin-graph has been rewritten to use the cgi code.
+# It is single threaded *by design* now.
+#
+graph_strategy cgi
+
+# munin-cgi-graph is invoked by the web server up to very many times at the
+# same time. This is not optimal since it results in high CPU and memory
+# consumption to the degree that the system can thrash. Again the default is
+# 6. Most likely the optimal number for max_cgi_graph_jobs is the same as
+# max_graph_jobs.
+#
+#munin_cgi_graph_jobs 6
+
+# If the automatic CGI url is wrong for your system override it here:
+#
+#cgiurl_graph /munin-cgi/munin-cgi-graph
+
+# max_size_x and max_size_y are the max size of images in pixel.
+# Default is 4000. Do not make it too large otherwise RRD might use all
+# RAM to generate the images.
+#
+#max_size_x 4000
+#max_size_y 4000
+
+# HTML files are normally generated by munin-html, no matter if the
+# files are used or not. You can change this to on-demand generation
+# by following the instructions in http://munin-monitoring.org/wiki/CgiHowto2
+#
+# Notes:
+# - moving to CGI for HTML means you cannot have graph generated by cron.
+# - cgi html has some bugs, mostly you still have to launch munin-html by hand
+#
+html_strategy cgi
+
+# munin-update runs in parallel.
+#
+# The default max number of processes is 16, and is probably ok for you.
+#
+# If set too high, it might hit some process/ram/filedesc limits.
+# If set too low, munin-update might take more than 5 min.
+#
+# If you want munin-update to not be parallel set it to 0.
+#
+#max_processes 16
+
+# RRD updates are per default, performed directly on the rrd files.
+# To reduce IO and enable the use of the rrdcached, uncomment it and set it to
+# the location of the socket that rrdcached uses.
+#
+rrdcached_socket /var/run/rrdcached.sock
+
+# Drop somejuser@fnord.comm and anotheruser@blibb.comm an email everytime
+# something changes (OK -> WARNING, CRITICAL -> OK, etc)
+contact.admin.command mail -s "Munin notification" admin@fripost.org
+#
+# For those with Nagios, the following might come in handy. In addition,
+# the services must be defined in the Nagios server as well.
+#contact.nagios.command /usr/bin/send_nsca nagios.host.comm -c /etc/nsca.conf
+
+local_address 127.0.0.1
+
+{% set n = 0 %}
+{% for node in groups.all | sort %}
+{% set n = n + 1 %}
+[all;{{ hostvars[node].inventory_hostname_short }}]
+{% if node == inventory_hostname %}
+ address 127.0.0.1
+{% else %}
+ address 127.0.{{ n }}.1
+{% endif %}
+ port 4994
+
+{% for g in hostvars[node].group_names | sort %}
+[{{ g }};{{ hostvars[node].inventory_hostname_short }}]
+ update no
+
+{% endfor %}
+
+{% endfor %}
diff --git a/roles/munin-master/templates/etc/stunnel/munin-master.conf.j2 b/roles/munin-master/templates/etc/stunnel/munin-master.conf.j2
new file mode 100644
index 0000000..c025183
--- /dev/null
+++ b/roles/munin-master/templates/etc/stunnel/munin-master.conf.j2
@@ -0,0 +1,62 @@
+; **************************************************************************
+; * Global options *
+; **************************************************************************
+
+; setuid()/setgid() to the specified user/group in daemon mode
+setuid = stunnel4
+setgid = stunnel4
+
+; PID is created inside the chroot jail
+pid = /var/run/stunnel4/munin-master.pid
+
+; Only log messages at severity warning (4) and higher
+debug = 4
+
+; **************************************************************************
+; * Service defaults may also be specified in individual service sections *
+; **************************************************************************
+
+; Certificate/key is needed in server mode and optional in client mode
+cert = /etc/stunnel/certs/munin-{{ inventory_hostname_short }}.pem
+key = /etc/stunnel/certs/munin-{{ inventory_hostname_short }}.key
+client = yes
+socket = a:SO_BINDTODEVICE=lo
+
+; Some performance tunings
+socket = l:TCP_NODELAY=1
+socket = r:TCP_NODELAY=1
+
+; Prevent MITM attacks
+verify = 4
+
+; Disable support for insecure protocols
+options = NO_SSLv2
+options = NO_SSLv3
+options = NO_TLSv1
+options = NO_TLSv1.1
+
+; These options provide additional security at some performance degradation
+options = SINGLE_ECDH_USE
+options = SINGLE_DH_USE
+
+; Select permitted SSL ciphers
+ciphers = EECDH+AES:EDH+AES:!MEDIUM:!LOW:!EXP:!aNULL:!eNULL:!SSLv2:!SSLv3:!TLSv1:!TLSv1.1
+
+; **************************************************************************
+; * Service definitions (remove all services for inetd mode) *
+; **************************************************************************
+
+{% set n = 0 %}
+{% for node in groups.all | sort %}
+{% set n = n + 1 %}
+{% if node != inventory_hostname %}
+[{{ hostvars[node].inventory_hostname_short }}]
+accept = 127.0.{{ n }}.1:4994
+connect = {{ node }}:4949
+delay = yes
+CAfile = /etc/stunnel/certs/munin-{{ hostvars[node].inventory_hostname_short }}.pem
+{% endif %}
+
+{% endfor %}
+
+; vim:ft=dosini