FSF France machines management - Cookbook: recipe #311, Non standard scripts and patches

recipe #311, Information: Non standard scripts and patches

Non standard scripts and patches required to install and operate the ganeti based cluster :

Ganeti Debootstrap

These scripts are only useful if installing a VM with the deboostrap method of ganeti (not useful if installing from an ISO for instance).

/etc/ganeti/instance-debootstrap.d/ :

• file #10778 add eth0/dhcp config in /etc/network/interfaces
• file #10779 add our ssh pubkeys (loic,maxence,proppy) and disable password auth.

Munin

Kvm plugins

upstream is http://gitorious.org/mungins/mungins and muninexchange is usually lagging behind :

• http://gitorious.org/mungins/mungins/blobs/raw/master/kvm/kvm_cpu
• http://gitorious.org/mungins/mungins/blobs/raw/master/kvm/kvm_mem
• http://gitorious.org/mungins/mungins/blobs/raw/master/kvm/kvm_io
• http://gitorious.org/mungins/mungins/blobs/raw/master/kvm/kvm_net

wget -O /usr/share/munin/plugins/kvm_cpu http://exchange.munin-monitoring.org/plugins/kvm_cpu/version/1/download wget -O /usr/share/munin/plugins/kvm_mem http://exchange.munin-monitoring.org/plugins/kvm_mem/version/1/download wget -O /usr/share/munin/plugins/kvm_io http://exchange.munin-monitoring.org/plugins/kvm_io/version/1/download wget -O /usr/share/munin/plugins/kvm_net http://exchange.munin-monitoring.org/plugins/kvm_net/version/1/download chmod +x /usr/share/munin/plugins/kvm_* munin-node-configure --suggest --shell --families contrib munin-node-configure --suggest --shell --families contrib | bash etc/init.d/munin-node restart nc localhost 4949 # and see kvm_cpu kvm_net kvm_mem kvm_io

Configuration

Allow anyone to query munin node: line 36, replace allow ^127\.0\.0\.1$ by allow ^.*$

Aggregates views

wget -O /usr/lib/cgi-bin/muninAggregator.pl http://munin-monitoring.org/attachment/wiki/WishList/muninAggregator.3.pl chmod +x /usr/lib/cgi-bin/muninAggregator.pl cd /etc/munin ; patch : templates/munin-overview.tmpl

Nagios

DRBD

http://code.google.com/p/ganeti/wiki/DrbdDevicesMonitoring with file #10781 (already patched according to the HOWTO) on each node

Ganeti redundancy

On the ganeti master (z2-3.host.gnt in the nagios command below)

Append the following where 1.1.1.1 is the IP of the nagios host

Add a nagios command
define command{ command_name check_ganeti_redundancy command_line /usr/lib/nagios/plugins/check_by_ssh -i /etc/nagios3/id_rsa -H z2-3.host.gnt -l root -C "/usr/local/bin/check_ganeti \ $HOSTADDRESS$" }

Add the nagios ganeti-service definition (note the longer check_interval : 600 instead of )
generic ganeti service template definition define service{ name ganeti-service; The 'name' of this service template active_checks_enabled 1 ; Active service checks are enabled passive_checks_enabled 1 ; Passive service checks are enabled/accepted parallelize_check 1 ; Active service checks should be parallelized (disabling this can lead to major performance problems\ ) obsess_over_service 1 ; We should obsess over this service (if necessary) check_freshness 0 ; Default is to NOT check service 'freshness' notifications_enabled 1 ; Service notifications are enabled event_handler_enabled 1 ; Service event handler is enabled flap_detection_enabled 1 ; Flap detection is enabled failure_prediction_enabled 1 ; Failure prediction is enabled process_perf_data 1 ; Process performance data retain_status_information 1 ; Retain status information across program restarts retain_nonstatus_information 1 ; Retain non-status information across program restarts notification_interval 0 ; Only send notifications on status change by default. is_volatile 0 check_period 24x7 normal_check_interval 600 retry_check_interval 30 max_check_attempts 4 notification_period 24x7 notification_options w,u,c,r contact_groups admins register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE! }

For each ganeti node N add
define service { host_name N.host.gnt service_description ganeti check_command check_ganeti_redundancy use ganeti-service }

Drupal menu

file #10783 in /usr/lib/nagios/plugins : checks that drupal menu is ok. Nagios corresponding config :
define command{ command_name check_poker_menu command_line /usr/lib/nagios/plugins/check_menu $ARG1$ $ARG2$ $HOSTADDRESS$ }

pokersocial

file #10784 in /usr/lib/nagios/plugins : test POKER_REST with pokersocial. Nagios corresponding config :
define command{ command_name poker_rest_social_drupal6 command_line /usr/lib/nagios/plugins/check_pokersocial -H $HOSTADDRESS$ --container /drupal6 }

 

 

 

 

 

Attached Files