= Default CentOS 7 configuration =

{{{
#Install default packages
$ yum update
#install the  Fedora Extra Packages for Enterprise Linux (EPEL) repository
#http://www.rackspace.com/knowledge_center/article/install-epel-and-additional-repositories-on-centos-and-red-hat
$ yum install epel-release
$ yum install docker
$ yum install collectd
$ yum install mailx

#Create sysop users
$ useradd sanmai
$ usermod -aG wheel sanmai
$ useradd dietuyt
$ usermod -aG wheel dietuyt
$ useradd wilelb
$ usermod -aG wheel wilelb
#Set passwords for the users: passwd <user>

#Configure sshd
#no root login
PermitRootLogin no
#no username/password login
PasswordAuthentication no

#forward mail from root to sysops@clarin.eu
$ echo "root: sysops@clarin.eu" >> /etc/aliases
$ newaliases
$ service postfix restart

#test the configuration
$ echo test | mail -s "test message" root

#Enable services
systemctl enable docker.service
}}}

Auto start service on boot
{{{
systemctl enable httpd.service
}}}

Docker storage configuration
http://www.projectatomic.io/blog/2015/06/notes-on-fedora-centos-and-docker-storage-drivers/
https://access.redhat.com/articles/1492923
https://forums.docker.com/t/docker-storage-config-on-centos-7-1/3164

== CollectD ==

Installation:
{{{
yum install epel-release
yum install collectd
cp /etc/collectd.conf /etc/collectd.conf.orig
<edit /etc/collectd.conf according to the example below>
systemctl enable collectd.servic
service collectd restart
}}}

Example collectd configuration
{{{
##############################################################################
# Global                                                                     #
#----------------------------------------------------------------------------#
# Global settings for the daemon.                                            #
##############################################################################

#Hostname    "localhost"
#FQDNLookup   true
#BaseDir     "/var/lib/collectd"
#PIDFile     "/var/run/collectd.pid"
#PluginDir   "/usr/lib64/collectd"
#TypesDB     "/usr/share/collectd/types.db"

#----------------------------------------------------------------------------#
# When enabled, plugins are loaded automatically with the default options    #
# when an appropriate <Plugin ...> block is encountered.                     #
# Disabled by default.                                                       #
#----------------------------------------------------------------------------#
#AutoLoadPlugin false

#----------------------------------------------------------------------------#
# Interval at which to query values. This may be overwritten on a per-plugin #
# base by using the 'Interval' option of the LoadPlugin block:               #
#   <LoadPlugin foo>                                                         #
#       Interval 60                                                          #
#   </LoadPlugin>                                                            #
#----------------------------------------------------------------------------#
Interval     10

#Timeout      2
#ReadThreads  5
#WriteThreads 5

# Limit the size of the write queue. Default is no limit. Setting up a limit is
# recommended for servers handling a high volume of traffic.
#WriteQueueLimitHigh 1000000
#WriteQueueLimitLow   800000

##############################################################################
# Logging                                                                    #
#----------------------------------------------------------------------------#
# Plugins which provide logging functions should be loaded first, so log     #
# messages generated when loading or configuring other plugins can be        #
# accessed.                                                                  #
##############################################################################

LoadPlugin logfile
<Plugin logfile>
        LogLevel info
        File "/var/log/collectd/collectd.log"
        Timestamp true
        PrintSeverity false
</Plugin>

##############################################################################
# LoadPlugin section                                                         #
#----------------------------------------------------------------------------#
# Lines beginning with a single `#' belong to plugins which have been built  #
# but are disabled by default.                                               #
#                                                                            #
# Lines begnning with `##' belong to plugins which have not been built due   #
# to missing dependencies or because they have been deactivated explicitly.  #
##############################################################################

LoadPlugin cpu
LoadPlugin df
<Plugin df>
       MountPoint "/"
       IgnoreSelected false
       ReportByDevice false
       ReportReserved false
       ReportInodes true
       ValuesAbsolute true
       ValuesPercentage true
</Plugin>
LoadPlugin disk
<Plugin disk>
</Plugin>
LoadPlugin interface
<Plugin interface>
       Interface "eth0"
       IgnoreSelected false
</Plugin>
LoadPlugin load
LoadPlugin memory
LoadPlugin network
<Plugin network>
	Server "metrics.clarin.eu" "25826"
</Plugin>
LoadPlugin processes
LoadPlugin users

Include "/etc/collectd.d"
}}}