Dedicate a Logical Volume for Nagios

A LV of 20GB is dedicated for Nagios which uses /var/nagios for all its data:
 - object_cache_file
 - status_file
 - temp_file
 - log_file
 - debug_file
 - log_archive_path

Change-Id: I5dc67e6326e21af48c59e3acf7fe31541c5af497

README.md

@@ -84,6 +84,16 @@ User Guide
     - The name of the node where the plugin is deployed.
     - The username and password to access Nagios web interface.
 
+### Disks partitioning
+The plugin uses:
+
+- 20% of the first disk for the operating system by honoring the range of
+  15GB minimum and 50GB maximum.
+- 20GB for Nagios data and logs (/var/nagios).
+- 10GB for /var/log.
+
+It is recommended to review the partitioning done by Fuel before the deployment
+and adapt it to your requirements.
 
 Testing
 -------

deployment_scripts/puppet/modules/nagios/manifests/init.pp

@@ -36,6 +36,8 @@ class nagios(
   $additional_freshness_latency = $nagios::params::additional_freshness_latency,
   $check_external_commands = false,
   $command_check_interval = $nagios::params::command_check_interval,
+  $data_dir = $nagios::params::data_dir,
+
   $interval_length = $nagios::params::interval_length,
 ) inherits nagios::params {
 
@@ -64,6 +66,31 @@ class nagios(
   $service_freshness = bool2num($check_service_freshness)
   $host_freshness = bool2num($check_host_freshness)
   $external_command = bool2num($check_external_commands)
+  $cache_dir = "${data_dir}/cache/"
+  $object_cache_file = "${cache_dir}/objects.cache"
+  $status_file = "${cache_dir}/status.dat"
+  $temp_file = "${cache_dir}/nagios.tmp"
+  $log_file = "${data_dir}/nagios.log"
+  $debug_file = "${data_dir}/nagios.debug.log"
+  $log_archive_path = "${data_dir}/archives"
+
+  file { $data_dir:
+    ensure => directory,
+    owner  => 'nagios',
+    before => Package[$service_name],
+  }
+
+  file { $cache_dir:
+    ensure  => directory,
+    owner   => 'nagios',
+    require => File[$data_dir];
+  }
+
+  file { $log_archive_path:
+    ensure  => directory,
+    owner   => 'nagios',
+    require => File[$data_dir];
+  }
 
   augeas{ $main_config:
     incl    => $main_config,
@@ -85,6 +112,12 @@ class nagios(
         "set service_freshness_check_interval ${service_freshness_check_interval}",
         "set check_external_commands ${external_command}",
         "set command_check_interval  ${command_check_interval}",
+        "set object_cache_file ${object_cache_file}",
+        "set status_file ${status_file}",
+        "set temp_file ${temp_file}",
+        "set log_file ${log_file}",
+        "set debug_file ${debug_file}",
+        "set log_archive_path ${log_archive_path}",
         ],
     require => Package[$service_name],
     notify  => Class['nagios::server_service'],

deployment_scripts/puppet/modules/nagios/manifests/params.pp

@@ -62,6 +62,8 @@ class nagios::params {
   $log_rotation_method = 'd'
   $max_concurrent_checks = 0 # no limit
 
+  $data_dir = '/var/nagios'
+
   # default Nagios contact
   $default_contact_groups = ['admins']
   $default_contact_email = 'root@localhost'

volumes.yaml

@@ -1,5 +1,20 @@
-volumes: []
+volumes:
+  - id: "nagios"
+    type: "vg"
+    min_size:
+      generator: "calc_gb_to_mb"
+      generator_args: [20]
+    label: "Nagios data"
+    volumes:
+      - mount: "/var/nagios"
+        type: "lv"
+        name: "nagios"
+        file_system: "ext4"
+        size:
+          generator: "calc_total_vg"
+          generator_args: ["nagios"]
 volumes_roles_mapping:
   infrastructure_alerting:
     - {allocate_size: "min", id: "os"}
-    - {allocate_size: "all", id: "logs"}
+    - {allocate_size: "min", id: "logs"}
+    - {allocate_size: "min", id: "nagios"}