Machine/Discovery One/Node

ASLO Node

While discussing activities.sugarlabs.org maintainability with Dogi this afternoon, he suggested that instead of thinking about web, proxy, and database nodes we create a standard ALSO node which we can adopt and tune via configs.

Components

Database

Standard web node

Install needed packages

apt-get install mysql-client-5.0 mysql-server-5.0

Create database and set permissions

mysqladmin -u root -p create activities
mysql -u root -p

GRANT ALL ON *.* TO 'activities'@'xxx.xxx.xxx' IDENTIFIED BY 'XXXX';
exit;

Configuring database

/etc/mysql/my.cnf

[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0

[mysqld]
# * IMPORTANT
#   If you make changes to these settings and your system uses apparmor, you may
#   also need to also adjust /etc/apparmor.d/usr.sbin.mysqld.

user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
skip-external-locking


# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
# bind-address            = 127.0.0.1

# * Tuning
#

tmp_table_size          = 16M
 
innodb_buffer_pool_size = 1024M 
 
key_buffer              = 64M 
 
max_allowed_packet      = 16M 
thread_stack            = 128K 
thread_cache_size       = 8 
# This replaces the startup script and checks MyISAM tables if needed 
# the first time they are touched 
myisam-recover          = BACKUP 
 
max_connections         = 151 
 
table_cache             = 128 
#thread_concurrency     = 10 
 
query_cache_limit       = 2M 
query_cache_size        = 32M 

# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
#log            = /var/log/mysql/mysql.log
#
# Error logging goes to syslog. This is a Debian improvement :)
#
# Here you can see queries with especially long duration
log_slow_queries        = /var/log/mysql/mysql-slow.log
long_query_time = 1
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id              = 1
#log_bin                        = /var/log/mysql/mysql-bin.log
expire_logs_days        = 10
max_binlog_size         = 100M
#binlog_do_db           = include_database_name
#binlog_ignore_db       = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
# You might want to disable InnoDB to shrink the mysqld process by circa 100MB.
#skip-innodb
#
# * Federated
#
# The FEDERATED storage engine is disabled since 5.0.67 by default in the .cnf files
# shipped with MySQL distributions (my-huge.cnf, my-medium.cnf, and so forth).
#

#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem

[mysqldump]
quick
quote-names
max_allowed_packet      = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer              = 16M

#
# * NDB Cluster
#
# See /usr/share/doc/mysql-server-*/README.Debian for more information.
#
# The following configuration is read by the NDB Data Nodes (ndbd processes)
# not from the NDB Management Nodes (ndb_mgmd processes).
#
# [MYSQL_CLUSTER]
# ndb-connectstring=127.0.0.1


#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

Log Rotate

/etc/logrotate.d/mysql-server

# - I put everything in one block and added sharedscripts, so that mysql gets  
#   flush-logs'd only once. 
#   Else the binary logs would automatically increase by n times every day. 
# - The error log is obsolete, messages go to syslog now. 
/var/log/mysql.log /var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log { 
        daily 
        rotate 7 
        missingok 
        create 640 mysql adm 
        compress 
        sharedscripts 
        postrotate 
                test -x /usr/bin/mysqladmin || exit 0 
 
                # If this fails, check debian.conf!  
                MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf" 
                if [ -z "`$MYADMIN ping 2>/dev/null`" ]; then 
                  # Really no mysqld or rather a missing debian-sys-maint user? 
                  # If this occurs and is not a error please report a bug. 
                  if ps cax | grep -q mysqld; then 
                    exit 1 
                  fi  
                else 
                  $MYADMIN flush-logs 
                fi 
        endscript 
}

Turn off database by default

sudo update-rc.d -f mysql remove