stackforge/puppet-openstack-cloud
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[galera] Some master/slave tweaks

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This adds some tweaks for galera master/slave setup

It also allows to customize the galera gcache size,
This value depends mainly of the database traffic.
But the default value of 128M is clearly to low for us, this means
if a down node comeback and the data that need to be transfered is
greater than 128MB a full sync if done instead of an incremental.

So we use 1G by default and that should
changed in case of a deployement with a big database workload.
This commit is contained in:
Mehdi Abaakouk 2014-09-18 10:42:35 +02:00
parent 24bd6bc3d8
commit 253aaeb138
3 changed files with 10 additions and 6 deletions
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1
manifests/database/sql.pp
View File

@ -26,6 +26,7 @@ class cloud::database::sql (
$service_provider = 'sysv',
$galera_master_name = 'mgmt001',
$galera_internal_ips = ['127.0.0.1'],
$galera_gcache = '1G',
$keystone_db_host = '127.0.0.1',
$keystone_db_user = 'keystone',
$keystone_db_password = 'keystonepassword',

5
spec/classes/cloud_database_sql_spec.rb
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@ -32,6 +32,7 @@ describe 'cloud::database::sql' do
:api_eth => '10.0.0.1',
:galera_master_name => 'os-ci-test1',
:galera_internal_ips => ['10.0.0.1','10.0.0.2','10.0.0.3'],
:galera_gcache => '1G',
:keystone_db_host => '10.0.0.1',
:keystone_db_user => 'keystone',
:keystone_db_password => 'secrete',
@ -88,8 +89,8 @@ describe 'cloud::database::sql' do
context 'configure mysqlchk http replication' do
it { should contain_file('/etc/xinetd.d/mysqlchk').with_mode('0755') }
it { should contain_file('/usr/bin/clustercheck').with_mode('0755') }
it { should contain_file('/usr/bin/clustercheck').with_content(/MYSQL_USERNAME="#{params[:galera_clustercheck_dbuser]}"/)}
it { should contain_file('/usr/bin/clustercheck').with_content(/MYSQL_PASSWORD="#{params[:galera_clustercheck_dbpassword]}"/)}
it { should contain_file('/usr/bin/clustercheck').with_content(/MYSQL_USERNAME='#{params[:galera_clustercheck_dbuser]}'/)}
it { should contain_file('/usr/bin/clustercheck').with_content(/MYSQL_PASSWORD='#{params[:galera_clustercheck_dbpassword]}'/)}
it { should contain_file('/etc/xinetd.d/mysqlchk').with_content(/bind = #{params[:galera_clustercheck_ipaddress]}/)}
end # configure mysqlchk http replication

10
templates/database/mysql.conf.erb
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@ -49,14 +49,16 @@ wsrep_provider = "<%= @wsrep_provider %>"
wsrep_cluster_name = "galera_cluster"
wsrep_cluster_address = "gcomm://<%= @gcomm_definition %>"
wsrep_sst_auth = root:<%= @mysql_root_password %>
wsrep_certify_nonPK = 1
wsrep_convert_LOCK_to_trx = 0
wsrep_auto_increment_control = 1
wsrep_drupal_282555_workaround = 0
wsrep_causal_reads = 0
wsrep_sst_method = rsync
wsrep_node_address = "<%= @api_eth %>"
wsrep_node_incoming_address = "<%= @api_eth %>"
# This is the minimal value (proc*2)
wsrep_slave_threads = "<%= @processorcount.to_i * 2 %>"
# Thoses TWEAK assume that the galera cluster is used in master/slave mode
wsrep_provider_options = "gcache.size=<%= @galera_gcache %>;gcs.fc_master_slave=1;gcs.fc_limit=256;gcs.fc_factor=0.9"
# this value here are used by /usr/bin/innobackupex
# and wsrep_sst_xtrabackup take only one configuration file and use the last one
# (/etc/mysql/my.cnf is not used)