Make MySQL ignore lost+found directory in its datadir

This commit introduces optional ignore_db_dirs parameter that can be passed to
mysql::server. It is expected to be an array and is empty by default.

Change-Id: Ic8815b89fea41182692f9f8fafd07bbe6ca15af6
Closes-Bug: 1484552

deployment/puppet/mysql/manifests/config.pp

@@ -11,10 +11,11 @@
 #   [*config_file*]       - my.cnf configuration file path.
 #   [*socket*]            - mysql socket.
 #   [*datadir*]           - path to datadir.
-#   [*ssl]                - enable ssl
-#   [*ssl_ca]             - path to ssl-ca
-#   [*ssl_cert]           - path to ssl-cert
-#   [*ssl_key]            - path to ssl-key
+#   [*ssl*]               - enable ssl
+#   [*ssl_ca*]            - path to ssl-ca
+#   [*ssl_cert*]          - path to ssl-cert
+#   [*ssl_key*]           - path to ssl-key
+#   [*ignore_db_dirs*]    - array of directories to ignore in datadir.
 #
 # Actions:
 #
@@ -49,6 +50,7 @@ class mysql::config(
   $server_id          = $mysql::params::server_id,
   $debug              = $mysql::params::debug,
   $wait_timeout       = $mysql::params::wait_timeout,
+  $ignore_db_dirs     = $mysql::params::ignore_db_dirs,
 ) inherits mysql::params {
 
   $mysql_buffer_pool_size  = $::mysql::params::mysql_buffer_pool_size
@@ -59,6 +61,10 @@ class mysql::config(
   $myisam_sort_buffer_size = $::mysql::params::myisam_sort_buffer_size
   $open_files_limit        = $::mysql::params::open_files_limit
 
+  if ! is_array($ignore_db_dirs) {
+    fail('The ignore_db_dirs parameter is expected to be an array')
+  }
+
   if $custom_setup_class != "pacemaker_mysql" {
     File {
       owner  => 'root',

deployment/puppet/mysql/manifests/params.pp

@@ -32,6 +32,7 @@ class mysql::params {
   $open_files_limit        = '102400'
   $max_connections         = '3000'
   $debug                   = false
+  $ignore_db_dirs          = []
 
   case $::osfamily {
     'RedHat': {

deployment/puppet/mysql/manifests/server.pp

@@ -41,6 +41,7 @@ class mysql::server (
   $bind_address            = '0.0.0.0',
   $use_syslog              = true,
   $wait_timeout            = $mysql::params::wait_timeout,
+  $ignore_db_dirs          = $mysql::params::ignore_db_dirs,
 ) inherits mysql::params {
 
   if ($config_hash['config_file']) {

deployment/puppet/mysql/templates/my.cnf.erb

@@ -22,6 +22,11 @@ port      = <%= @port %>
 basedir   = <%= @basedir %>
 datadir   = <%= @datadir %>
 tmpdir    = /tmp
+<% if @ignore_db_dirs and (@ignore_db_dirs.length > 0) %>
+  <% @ignore_db_dirs.each do |directory| %>
+ignore-db-dir =  <%= directory %>
+  <% end %>
+<% end %>
 skip-external-locking
 bind-address    = <%= @bind_address %>
 max_allowed_packet = 256M

deployment/puppet/osnailyfacter/modular/database/database.pp

@@ -53,6 +53,12 @@ if $enabled {
     $config_hash_real = { }
   }
 
+  if '/var/lib/mysql' in split($::mounts, ',') {
+    $ignore_db_dirs = ['lost+found']
+  } else {
+    $ignore_db_dirs = []
+  }
+
   class { 'mysql::server':
     bind_address            => '0.0.0.0',
     etc_root_password       => true,
@@ -68,6 +74,7 @@ if $enabled {
     mysql_skip_name_resolve => $mysql_skip_name_resolve,
     use_syslog              => $use_syslog,
     config_hash             => $config_hash_real,
+    ignore_db_dirs          => $ignore_db_dirs,
   }
 
   class { 'osnailyfacter::mysql_user':

tests/noop/spec/hosts/database/database_spec.rb

@@ -4,6 +4,12 @@ manifest = 'database/database.pp'
 
 describe manifest do
   shared_examples 'catalog' do
+    let(:facts) {
+      Noop.ubuntu_facts.merge({
+        :mounts => '/,/boot,/var/log,/var/lib/glance,/var/lib/mysql'
+      })
+    }
+
     let(:endpoints) do
       Noop.hiera('network_scheme', {}).fetch('endpoints', {})
     end
@@ -24,7 +30,7 @@ describe manifest do
       (Noop.puppet_function 'get_node_to_ipaddr_map_by_network_role', database_nodes, 'mgmt/database').values
     end
 
-    it "should delcare osnailyfacter::mysql_user with correct other_networks" do
+    it "should declare osnailyfacter::mysql_user with correct other_networks" do
       expect(subject).to contain_class('osnailyfacter::mysql_user').with(
         'user'            => 'root',
         'access_networks' => access_networks,
@@ -37,6 +43,12 @@ describe manifest do
       ).that_comes_before('Osnailyfacter::Mysql_user')
     end
 
+    it "should configure mysql to ignore lost+found directory" do
+      expect(subject).to contain_class('mysql::server').with(
+        'ignore_db_dirs' => ['lost+found']
+      ).that_comes_before('Osnailyfacter::Mysql_user')
+    end
+
     it { should contain_class('osnailyfacter::mysql_access') }
     it { should contain_class('openstack::galera::status').that_comes_before('Haproxy_backend_status[mysql]') }
     it { should contain_haproxy_backend_status('mysql').that_comes_before('Class[osnailyfacter::mysql_access]') }