Postgresql 9.0 HA at RMLL 2012
•
6 likes•4,021 views
This document discusses setting up high availability for a PostgreSQL 9.0 database cluster. It describes migrating from PostgreSQL 8.3.7, which did not have native replication support, to PostgreSQL 9.0, which introduces built-in streaming replication. The author outlines configuring a master-slave replication setup with PostgreSQL 9.0 and Corosync for failover capability. Topics covered include streaming replication specifications and configuration, clustering with Corosync, backups, monitoring, and automation with Puppet.
More Related Content
What's hot
What's hot (20)
Similar to Postgresql 9.0 HA at RMLL 2012
Similar to Postgresql 9.0 HA at RMLL 2012 (20)
More from Julien Pivotto
More from Julien Pivotto (20)
Recently uploaded
Recently uploaded (20)
Postgresql 9.0 HA at RMLL 2012
- 1. ; PostgreSQL 9.0 HA Julien Pivotto July 11, 2012
- 2. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration Table of content 1 Overview The mission Before the migration 2 PostgreSQL 9.0 Intro Streaming replication Master configuration Slave configuration 3 Clustering Set up of corosync OCF resource Synthesis 4 Backups and monitoring Backups with cron jobs BackupPC Nagios Munin 5 Automation Puppet module The node file 6 The end Julien Pivotto PostgreSQL 9.0 HA
- 3. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration Who am I • Julien Pivotto • @roidelapluie • roidelapluie@inuits.eu • Consultant at Inuits (Belgium) since May 2011 • FOSS defender since 2005 Julien Pivotto PostgreSQL 9.0 HA
- 4. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration A.R.S.I.A. • Association Régionale de Santé et d’Identification Animales (Belgique) Julien Pivotto PostgreSQL 9.0 HA
- 5. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration A.R.S.I.A. • Association Régionale de Santé et d’Identification Animales (Belgique) • 30 linux servers in several locations Julien Pivotto PostgreSQL 9.0 HA
- 6. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration A.R.S.I.A. • Association Régionale de Santé et d’Identification Animales (Belgique) • 30 linux servers in several locations • A lot of Open Source: • CentOS, Samba, Open-xchange, mailscanner, Cyrus, • . . . Puppet, jenkins, foreman, OpenVPN, GLPI, rabbitmq, • . . . BackupPC, CUPS, icinga, trac, zope, plone, • . . . solr, pentaho, funambol, munin, squid, asterisk, • . . . and PostgreSQL, . . . Julien Pivotto PostgreSQL 9.0 HA
- 7. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration C.E.R.I.S.E • A web application: • Plone (python) • 15k+ visits, 500k+ pages and 2.000.000+ hits each month • Developped by another open-source company, Affinitic Julien Pivotto PostgreSQL 9.0 HA
- 8. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration C.E.R.I.S.E • A web application: • Plone (python) • 15k+ visits, 500k+ pages and 2.000.000+ hits each month • Developped by another open-source company, Affinitic • Several databases: • PostgreSQL 9.0 • Oracle database Julien Pivotto PostgreSQL 9.0 HA
- 9. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration C.E.R.I.S.E • A web application: • Plone (python) • 15k+ visits, 500k+ pages and 2.000.000+ hits each month • Developped by another open-source company, Affinitic • Several databases: • PostgreSQL 9.0 • Oracle database • Several servers/services: • Reverse proxies • Application servers • PostgreSQL servers • Oracledb server • Development server • Pentaho server Julien Pivotto PostgreSQL 9.0 HA
- 10. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 Julien Pivotto PostgreSQL 9.0 HA
- 11. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 • No native support of HA Julien Pivotto PostgreSQL 9.0 HA
- 12. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 • No native support of HA • High availability with heartbeat 2 and DRBD Julien Pivotto PostgreSQL 9.0 HA
- 13. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 • No native support of HA • High availability with heartbeat 2 and DRBD • Installed on the application servers Julien Pivotto PostgreSQL 9.0 HA
- 14. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 • No native support of HA • High availability with heartbeat 2 and DRBD • Installed on the application servers • Nothing automated Julien Pivotto PostgreSQL 9.0 HA
- 15. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration PostgreSQL before the migration • PostgreSQL 8.3.7 • No native support of HA • High availability with heartbeat 2 and DRBD • Installed on the application servers • Nothing automated • Failover: Passive node is not even read only Julien Pivotto PostgreSQL 9.0 HA
- 16. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration Monitoring before the installation • Icinga • Check of the DRBD • Simple connection check to PostgreSQL Julien Pivotto PostgreSQL 9.0 HA
- 17. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration Monitoring before the installation • Icinga • Check of the DRBD • Simple connection check to PostgreSQL • Graphing with Cacti: • Size of the databases • Connexions to the database • Checkpoints Julien Pivotto PostgreSQL 9.0 HA
- 18. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end The mission Before the migration Backups before the installation • Hourly local backups • External backups (on disk and on tape) • Made with pg_dump command • External backups tool: BackupPC Julien Pivotto PostgreSQL 9.0 HA
- 19. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration PostgreSQL 9.0 • Released in september 2010 Julien Pivotto PostgreSQL 9.0 HA
- 20. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration PostgreSQL 9.0 • Released in september 2010 • First version with native replication Julien Pivotto PostgreSQL 9.0 HA
- 21. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration PostgreSQL 9.0 • Released in september 2010 • First version with native replication • No native failover tool Julien Pivotto PostgreSQL 9.0 HA
- 22. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration PostgreSQL 9.0 • Released in september 2010 • First version with native replication • No native failover tool • We need to use PostgreSQL + Corosync Julien Pivotto PostgreSQL 9.0 HA
- 23. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Write-Ahead Logging • Every change to datafile is first written into a log file Julien Pivotto PostgreSQL 9.0 HA
- 24. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Write-Ahead Logging • Every change to datafile is first written into a log file • Less disk writes Julien Pivotto PostgreSQL 9.0 HA
- 25. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Write-Ahead Logging • Every change to datafile is first written into a log file • Less disk writes • More cohesion Julien Pivotto PostgreSQL 9.0 HA
- 26. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Write-Ahead Logging • Every change to datafile is first written into a log file • Less disk writes • More cohesion • Logs can be replayed Julien Pivotto PostgreSQL 9.0 HA
- 27. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration What is streaming replication • Ship and apply WAL XLOGS to standby servers Julien Pivotto PostgreSQL 9.0 HA
- 28. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration What is streaming replication • Ship and apply WAL XLOGS to standby servers • Possibility to have multiple standby servers Julien Pivotto PostgreSQL 9.0 HA
- 29. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration What is streaming replication • Ship and apply WAL XLOGS to standby servers • Possibility to have multiple standby servers • Standby servers can be read-only ("Hot standby") Julien Pivotto PostgreSQL 9.0 HA
- 30. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Disadvantages of streaming replication Julien Pivotto PostgreSQL 9.0 HA
- 31. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Disadvantages of streaming replication • Asynchronous log-shipping Julien Pivotto PostgreSQL 9.0 HA
- 32. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Disadvantages of streaming replication • Asynchronous log-shipping • No native HA features in PostgreSQL Julien Pivotto PostgreSQL 9.0 HA
- 33. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Disadvantages of streaming replication • Asynchronous log-shipping • No native HA features in PostgreSQL • Single-threaded replication Julien Pivotto PostgreSQL 9.0 HA
- 34. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Specifications of streaming replication • Asynchronous log-shipping • Delay is often very close to 0 • No native HA features in PostgreSQL • Single-threaded replication Julien Pivotto PostgreSQL 9.0 HA
- 35. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Specifications of streaming replication • Asynchronous log-shipping • Delay is often very close to 0 • No native HA features in PostgreSQL • We will use corosync • Single-threaded replication Julien Pivotto PostgreSQL 9.0 HA
- 36. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Specifications of streaming replication • Asynchronous log-shipping • Delay is often very close to 0 • No native HA features in PostgreSQL • We will use corosync • Single-threaded replication • Single-threaded replication. . . Julien Pivotto PostgreSQL 9.0 HA
- 37. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration Only one specific configuration file. Julien Pivotto PostgreSQL 9.0 HA
- 38. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration Only one specific configuration file. Configuration related to SR wal_level = hot_standby max_wal_senders = 2 wal_keep_segments = 128 Julien Pivotto PostgreSQL 9.0 HA
- 39. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Julien Pivotto PostgreSQL 9.0 HA
- 40. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Allows stanby server to be readable Julien Pivotto PostgreSQL 9.0 HA
- 41. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Allows stanby server to be readable • max_wal_senders = 2 Julien Pivotto PostgreSQL 9.0 HA
- 42. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Allows stanby server to be readable • max_wal_senders = 2 We allow up to 2 standby nodes Julien Pivotto PostgreSQL 9.0 HA
- 43. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Allows stanby server to be readable • max_wal_senders = 2 We allow up to 2 standby nodes • wal_keep_segments = 128 Julien Pivotto PostgreSQL 9.0 HA
- 44. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Master configuration • wal_level = hot_standby Allows stanby server to be readable • max_wal_senders = 2 We allow up to 2 standby nodes • wal_keep_segments = 128 The minimum wal segments to keep Julien Pivotto PostgreSQL 9.0 HA
- 45. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration • Two configuration files Julien Pivotto PostgreSQL 9.0 HA
- 46. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration • Two configuration files • PostgreSQL.conf file Julien Pivotto PostgreSQL 9.0 HA
- 47. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration • Two configuration files • PostgreSQL.conf file • Recovery.conf file Julien Pivotto PostgreSQL 9.0 HA
- 48. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration • Two configuration files • PostgreSQL.conf file • Recovery.conf file • A trigger file to stop replication can be specified Julien Pivotto PostgreSQL 9.0 HA
- 49. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration • Two configuration files • PostgreSQL.conf file • Recovery.conf file • A trigger file to stop replication can be specified PostgreSQL.conf - Configuration related to SR wal_level = hot_standby hot_standby = on Julien Pivotto PostgreSQL 9.0 HA
- 50. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration recovery.conf standby_mode = ‘on’ primary_conninfo = ‘host=192.168.142.31 user=replicuser’ Julien Pivotto PostgreSQL 9.0 HA
- 51. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration recovery.conf standby_mode = ‘on’ primary_conninfo = ‘host=192.168.142.31 user=replicuser’ • standby_mode = standby server Julien Pivotto PostgreSQL 9.0 HA
- 52. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Slave configuration recovery.conf standby_mode = ‘on’ primary_conninfo = ‘host=192.168.142.31 user=replicuser’ • standby_mode = standby server • primary_conninfo = connection to the master Julien Pivotto PostgreSQL 9.0 HA
- 53. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Replication user • Super user called replication is created Julien Pivotto PostgreSQL 9.0 HA
- 54. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Replication user • Super user called replication is created SQL query to create super user CREATE USER replication SUPERUSER LOGIN CONNECTION LIMIT 1 ENCRYPTED PASSWORD ‘foobar’; Julien Pivotto PostgreSQL 9.0 HA
- 55. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration pg_hba.conf • pg_hba.conf contains some kind of ACLs for the PostgreSQL connections Julien Pivotto PostgreSQL 9.0 HA
- 56. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration pg_hba.conf • pg_hba.conf contains some kind of ACLs for the PostgreSQL connections • Need to add the nodes as trusted. Julien Pivotto PostgreSQL 9.0 HA
- 57. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration pg_hba.conf • pg_hba.conf contains some kind of ACLs for the PostgreSQL connections • Need to add the nodes as trusted. pg_hba.conf hostnossl all all 192.168.142.31/32 trust hostnossl all all 192.168.142.31/32 trust hostnossl replication replicuser 192.168.142.32/32 trust Julien Pivotto PostgreSQL 9.0 HA
- 58. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Setting up a slave • 3 commands required to add a slave Julien Pivotto PostgreSQL 9.0 HA
- 59. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Intro Streaming replication Master configuration Slave configuration Setting up a slave • 3 commands required to add a slave Adding a standby server psql -c "SELECT pg_start_backup(’label’, true)" rsync -a ${PGDATA}/ standby:/srv/pgsql/standby/ --exclude postmaster.pid --exclude ‘*-master’ --exclude ‘*-slave’ psql -c "SELECT pg_stop_backup()" Julien Pivotto PostgreSQL 9.0 HA
- 60. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Corosync configuration • Goal: switching between master/slave Julien Pivotto PostgreSQL 9.0 HA
- 61. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Corosync configuration • Goal: switching between master/slave • One and only one node should be master Julien Pivotto PostgreSQL 9.0 HA
- 62. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Corosync configuration • Goal: switching between master/slave • One and only one node should be master • Master need to be connected to the router Julien Pivotto PostgreSQL 9.0 HA
- 63. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Corosync configuration • Goal: switching between master/slave • One and only one node should be master • Master need to be connected to the router • Custom master/slave ocf resource Julien Pivotto PostgreSQL 9.0 HA
- 64. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf • Main configuration file of corosync is /etc/corosync/crm.conf. • Contains all the resources/nodes/etc. . . Julien Pivotto PostgreSQL 9.0 HA
- 65. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf • Main configuration file of corosync is /etc/corosync/crm.conf. • Contains all the resources/nodes/etc. . . Defining the nodes node dupont.demo attributes standby="off" node dupond.demo attributes standby="on" Julien Pivotto PostgreSQL 9.0 HA
- 66. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Primitives primitive pgsql ocf:inuits:pgsql-ms primitive virt_ip ocf:heartbeat:IPaddr2 params nic="eth1" iflabel="0" ip="192.168.142.30" cidr_netmask="24" broadcast="192.168.142.255" meta target-role="Started" is-managed="true" primitive ping ocf:pacemaker:ping params host_list="192.168.142.1" op monitor interval="10s" timeout="10s" op start interval="0" timeout="45s" op stop interval="0" timeout="50s" Julien Pivotto PostgreSQL 9.0 HA
- 67. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Primitives primitive pgsql ocf:inuits:pgsql-ms primitive virt_ip ocf:heartbeat:IPaddr2 params nic="eth1" iflabel="0" ip="192.168.142.30" cidr_netmask="24" broadcast="192.168.142.255" meta target-role="Started" is-managed="true" primitive ping ocf:pacemaker:ping params host_list="192.168.142.1" op monitor interval="10s" timeout="10s" op start interval="0" timeout="45s" op stop interval="0" timeout="50s" • 3 primitives: Julien Pivotto PostgreSQL 9.0 HA
- 68. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Primitives primitive pgsql ocf:inuits:pgsql-ms primitive virt_ip ocf:heartbeat:IPaddr2 params nic="eth1" iflabel="0" ip="192.168.142.30" cidr_netmask="24" broadcast="192.168.142.255" meta target-role="Started" is-managed="true" primitive ping ocf:pacemaker:ping params host_list="192.168.142.1" op monitor interval="10s" timeout="10s" op start interval="0" timeout="45s" op stop interval="0" timeout="50s" • 3 primitives: • pgsql, the PostgreSQL primitive Julien Pivotto PostgreSQL 9.0 HA
- 69. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Primitives primitive pgsql ocf:inuits:pgsql-ms primitive virt_ip ocf:heartbeat:IPaddr2 params nic="eth1" iflabel="0" ip="192.168.142.30" cidr_netmask="24" broadcast="192.168.142.255" meta target-role="Started" is-managed="true" primitive ping ocf:pacemaker:ping params host_list="192.168.142.1" op monitor interval="10s" timeout="10s" op start interval="0" timeout="45s" op stop interval="0" timeout="50s" • 3 primitives: • pgsql, the PostgreSQL primitive • virt_ip, the floating IP address Julien Pivotto PostgreSQL 9.0 HA
- 70. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Primitives primitive pgsql ocf:inuits:pgsql-ms primitive virt_ip ocf:heartbeat:IPaddr2 params nic="eth1" iflabel="0" ip="192.168.142.30" cidr_netmask="24" broadcast="192.168.142.255" meta target-role="Started" is-managed="true" primitive ping ocf:pacemaker:ping params host_list="192.168.142.1" op monitor interval="10s" timeout="10s" op start interval="0" timeout="45s" op stop interval="0" timeout="50s" • 3 primitives: • pgsql, the PostgreSQL primitive • virt_ip, the floating IP address • ping, the primitive that will check that the servers are connected to the router Julien Pivotto PostgreSQL 9.0 HA
- 71. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Configuring the primitives ms pgsql-ms pgsql params pgsqlconfig="/var/lib/pgsql/data/postgresql.conf" lsb_script="/etc/init.d/postgresql-9.0" pgsqlrecovery="/var/lib/pgsql/data/recovery.conf" meta clone-max="2" clone-node-max="1" master-max="1" master-node-max="1" notify="false" clone clone-ping ping meta globally-unique="false" Julien Pivotto PostgreSQL 9.0 HA
- 72. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Configuring the primitives ms pgsql-ms pgsql params pgsqlconfig="/var/lib/pgsql/data/postgresql.conf" lsb_script="/etc/init.d/postgresql-9.0" pgsqlrecovery="/var/lib/pgsql/data/recovery.conf" meta clone-max="2" clone-node-max="1" master-max="1" master-node-max="1" notify="false" clone clone-ping ping meta globally-unique="false" • PostgreSQL M/S configuration: the init script, the configuration files. . . Julien Pivotto PostgreSQL 9.0 HA
- 73. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf Configuring the primitives ms pgsql-ms pgsql params pgsqlconfig="/var/lib/pgsql/data/postgresql.conf" lsb_script="/etc/init.d/postgresql-9.0" pgsqlrecovery="/var/lib/pgsql/data/recovery.conf" meta clone-max="2" clone-node-max="1" master-max="1" master-node-max="1" notify="false" clone clone-ping ping meta globally-unique="false" • PostgreSQL M/S configuration: the init script, the configuration files. . . • Ping resource as a clone (launched on both servers) Julien Pivotto PostgreSQL 9.0 HA
- 74. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf group and colocation group PSQL virt_ip location connected PSQL rule $id="connected-rule" -inf: not_defined pingd or pingd lte 0 colocation ip_psql inf: PSQL pgsql-ms:Master property $id="cib-bootstrap-options" cluster-infrastructure="openais" expected-quorum-votes="2" stonith-enabled="false" no-quorum-policy="ignore" default-resource-stickiness="INFINITY" rsc_defaults $id="rsc_defaults-options" migration-threshold="INFINITY" failure-timeout="10" resource-stickiness="INFINITY" • Master should always be on the same node as the floating IP address Julien Pivotto PostgreSQL 9.0 HA
- 75. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis crm.conf group and colocation group PSQL virt_ip location connected PSQL rule $id="connected-rule" -inf: not_defined pingd or pingd lte 0 colocation ip_psql inf: PSQL pgsql-ms:Master property $id="cib-bootstrap-options" cluster-infrastructure="openais" expected-quorum-votes="2" stonith-enabled="false" no-quorum-policy="ignore" default-resource-stickiness="INFINITY" rsc_defaults $id="rsc_defaults-options" migration-threshold="INFINITY" failure-timeout="10" resource-stickiness="INFINITY" • Master should always be on the same node as the floating IP address • Master should be connected to the router Julien Pivotto PostgreSQL 9.0 HA
- 76. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • Custom OCF resource to manage the master/slave PostgreSQL Julien Pivotto PostgreSQL 9.0 HA
- 77. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • Custom OCF resource to manage the master/slave PostgreSQL • Based on an example of resource written by Andrew Beekhof from Clusterlabs Julien Pivotto PostgreSQL 9.0 HA
- 78. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • Custom OCF resource to manage the master/slave PostgreSQL • Based on an example of resource written by Andrew Beekhof from Clusterlabs • The file is in /usr/lib/ocf/resource.d/inuits/pgsql-ms • Available on github! https://github.com/roidelapluie/puppet-cluster Julien Pivotto PostgreSQL 9.0 HA
- 79. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • The script does the following: Julien Pivotto PostgreSQL 9.0 HA
- 80. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • The script does the following: • Move the postgresql.conf-master to postgresql.conf when a node is promoted/master Julien Pivotto PostgreSQL 9.0 HA
- 81. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • The script does the following: • Move the postgresql.conf-master to postgresql.conf when a node is promoted/master • Move the postgresql.conf-slave to postgresql.conf when a node is depromoted/slave Julien Pivotto PostgreSQL 9.0 HA
- 82. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • The script does the following: • Move the postgresql.conf-master to postgresql.conf when a node is promoted/master • Move the postgresql.conf-slave to postgresql.conf when a node is depromoted/slave • Ensure that recovery.conf-slave is on recovery.conf on slave and absent on master Julien Pivotto PostgreSQL 9.0 HA
- 83. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis OCF resource • The script does the following: • Move the postgresql.conf-master to postgresql.conf when a node is promoted/master • Move the postgresql.conf-slave to postgresql.conf when a node is depromoted/slave • Ensure that recovery.conf-slave is on recovery.conf on slave and absent on master • Starts/restarts PostgreSQL when needed. Julien Pivotto PostgreSQL 9.0 HA
- 84. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Synthesis Julien Pivotto PostgreSQL 9.0 HA
- 85. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Synthesis Julien Pivotto PostgreSQL 9.0 HA
- 86. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Set up of corosync OCF resource Synthesis Synthesis Julien Pivotto PostgreSQL 9.0 HA
- 87. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Backups of the databases • The databases are quite small (a few gigabytes) • Hourly on each node (one at minute 0 and one at minute 30) • Daily external backup of each node • We keep 24 hourly backups and 7 daily backups on disk • BackupPC: we keep months of backups Julien Pivotto PostgreSQL 9.0 HA
- 88. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Hourly backup script /usr/local/bin/backup_hourly.sh #!/bin/bash DATE=$(date +%H) BACKUP_PATH=/var/lib/backups/hourly for db in foobar_db foobar2_db do /usr/bin/pg_dump $db | gzip > $BACKUP_PATH/${db}_$DATE.pgsql.gz ln -fs $BACKUP_PATH/${db}_$DATE.pgsql.gz $BACKUP_PATH/${db}_current.pgsql.gz done Julien Pivotto PostgreSQL 9.0 HA
- 89. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Hourly backup script /usr/local/bin/backup_hourly.sh #!/bin/bash DATE=$(date +%H) BACKUP_PATH=/var/lib/backups/hourly for db in foobar_db foobar2_db do /usr/bin/pg_dump $db | gzip > $BACKUP_PATH/${db}_$DATE.pgsql.gz ln -fs $BACKUP_PATH/${db}_$DATE.pgsql.gz $BACKUP_PATH/${db}_current.pgsql.gz done The daily script is almost the same. Julien Pivotto PostgreSQL 9.0 HA
- 90. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin BackupPC script /usr/local/bin/backup_backuppc.sh #!/bin/bash DATE=$(date +%u) BACKUP_PATH=/var/lib/backups/backuppc for db in cerise trackitquality trackit zodb_cerise do /usr/bin/pg_dump -U postgres $db | gzip > $BACKUP_PATH/${db}_$DATE.pgsql.gz ln -fs $BACKUP_PATH/${db}_$DATE.pgsql.gz $BACKUP_PATH/${db}_current.pgsql.gz done Julien Pivotto PostgreSQL 9.0 HA
- 91. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin BackupPC script /usr/local/bin/backup_backuppc.sh #!/bin/bash DATE=$(date +%u) BACKUP_PATH=/var/lib/backups/backuppc for db in cerise trackitquality trackit zodb_cerise do /usr/bin/pg_dump -U postgres $db | gzip > $BACKUP_PATH/${db}_$DATE.pgsql.gz ln -fs $BACKUP_PATH/${db}_$DATE.pgsql.gz $BACKUP_PATH/${db}_current.pgsql.gz done In the backupPC config, I added the following: BackupPC config $Conf{DumpPreUserCmd} = ‘$sshPath -t -q -x -l backuppc $host /usr/local/bin/backup_backuppc.sh’; Julien Pivotto PostgreSQL 9.0 HA
- 92. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin check_postgres script • check_postgres.pl is a nagios-compatible perl script Julien Pivotto PostgreSQL 9.0 HA
- 93. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin check_postgres script • check_postgres.pl is a nagios-compatible perl script • Available on http://www.bucardo.org/check_postgres/ and on Github Julien Pivotto PostgreSQL 9.0 HA
- 94. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin check_postgres script • check_postgres.pl is a nagios-compatible perl script • Available on http://www.bucardo.org/check_postgres/ and on Github • Checks: Julien Pivotto PostgreSQL 9.0 HA
- 95. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin check_postgres script • check_postgres.pl is a nagios-compatible perl script • Available on http://www.bucardo.org/check_postgres/ and on Github • Checks: • Current connections number Julien Pivotto PostgreSQL 9.0 HA
- 96. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin check_postgres script • check_postgres.pl is a nagios-compatible perl script • Available on http://www.bucardo.org/check_postgres/ and on Github • Checks: • Current connections number • Replication delay Julien Pivotto PostgreSQL 9.0 HA
- 97. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Check hot_standby latency • The check_postgres.pl script has a check for hot_standby delay Julien Pivotto PostgreSQL 9.0 HA
- 98. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Check hot_standby latency • The check_postgres.pl script has a check for hot_standby delay • We do not know who is the master and the slave Julien Pivotto PostgreSQL 9.0 HA
- 99. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Check hot_standby latency • The check_postgres.pl script has a check for hot_standby delay • We do not know who is the master and the slave • Here is a bash script I wrote to know the M/S order Julien Pivotto PostgreSQL 9.0 HA
- 100. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Check hot_standby latency • The check_postgres.pl script has a check for hot_standby delay • We do not know who is the master and the slave • Here is a bash script I wrote to know the M/S order Master/slave replication check #!/bin/bash /usr/lib64/nagios/plugins/check_postgres.pl --db="$1" --action hot_standby_delay -w 300 -c 600 --host=$( crm_resource --resource pgsql-ms --locate| awk ‘/Master/ {master=$6} / $/ {slave=$6} END {print master","slave}’ ) Julien Pivotto PostgreSQL 9.0 HA
- 101. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Munin postgres scripts • Munin is shipped with perl plugins for postgresql Julien Pivotto PostgreSQL 9.0 HA
- 102. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Munin postgres scripts • Munin is shipped with perl plugins for postgresql • We use four of them: Julien Pivotto PostgreSQL 9.0 HA
- 103. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Munin postgres scripts • Munin is shipped with perl plugins for postgresql • We use four of them: • postgres_size, • postgres_checkpoints, • postgres_connections_db, • postgres_cache Julien Pivotto PostgreSQL 9.0 HA
- 104. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Backups with cron jobs BackupPC Nagios Munin Munin postgres scripts Julien Pivotto PostgreSQL 9.0 HA
- 105. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Puppet module • Puppet-postgres module forked from Kris Buytaert’s github page Julien Pivotto PostgreSQL 9.0 HA
- 106. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Puppet module • Puppet-postgres module forked from Kris Buytaert’s github page • Forked to remove all references to services Julien Pivotto PostgreSQL 9.0 HA
- 107. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Puppet module • Puppet-postgres module forked from Kris Buytaert’s github page • Forked to remove all references to services • Creates the users, the super users, the databases Julien Pivotto PostgreSQL 9.0 HA
- 108. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Puppet module • Puppet-postgres module forked from Kris Buytaert’s github page • Forked to remove all references to services • Creates the users, the super users, the databases • Parameterized classes Julien Pivotto PostgreSQL 9.0 HA
- 109. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Puppet module • Puppet-postgres module forked from Kris Buytaert’s github page • Forked to remove all references to services • Creates the users, the super users, the databases • Parameterized classes • The cache sizes are parameterized too (useful for Vagrant boxes) Julien Pivotto PostgreSQL 9.0 HA
- 110. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Sqlexec definition sqlexec.pp define postgres::sqlexec($username, $database, $sql, $sqlcheck, $host=’localhost’, $password="") { exec{ "psql -h $host –username=${username} $database -c ¨${sql}¨&& /bin/sleep 5": environment => "PGPASSWORD=${password}", path => $::path, timeout => 600, unless => "psql -h $host -U $username $database -c $sqlcheck", } } Julien Pivotto PostgreSQL 9.0 HA
- 111. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Example in the node file Here is the result in the node file: Julien Pivotto PostgreSQL 9.0 HA
- 112. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Example in the node file Here is the result in the node file: site.pp node postgres-server { include postgres include site class { ’cluster’: cluster_bind_interface => ’eth1’, cluster_mcastaddr => ’226.94.1.1’, } postgres::hba { $::fqdn: password => ’yes’, allowedrules => [ "host all all $::ipaddress/32 password", ’hostnossl replication replicuser 192.168.142.31/24 trust’, ’hostnossl replication replicuser 192.168.142.32/24 trust’, ’hostnossl all all 192.168.142.0/24 password’, ] } include site::sshkeys Postgres::Cluster[$::fqdn] -> Class[’cluster’] } Julien Pivotto PostgreSQL 9.0 HA
- 113. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Example in the node file dupont.pp node dupont inherits postgres-server { postgres::cluster { $::fqdn: other_node_ip => ’192.168.142.31’, listen => ’*’, max_connections => ’100’, shared_buffers => ’120MB’, work_mem => ’3MB’, effective_cache_size => ’352MB’, } class { ’postgres::firstsync’: remotehost => ’dupont’, password => ’rmll2012’, } Class[’postgres’] -> Postgres::Cluster[$::fqdn] Julien Pivotto PostgreSQL 9.0 HA
- 114. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Example in the node file dupont.pp exec { ’/bin/sleep 10’: refreshonly => true, subscribe => Exec[’load_crm_config’], } exec { ’crm node online dupond.demo’: refreshonly => true, path => $::path, subscribe => Exec[’load_crm_config’], require => Exec[’/bin/sleep 10’, ’crm node online dupond.demo’], } Class[’site’] -> Class[’cluster’] -> Class[’postgres::firstsync’] Class[’postgres::firstsync’] -> Postgres::Hba[$::fqdn] Class[’cluster’] -> Exec[’/bin/sleep 10’] -> Class[’postgres::firstsync’] Julien Pivotto PostgreSQL 9.0 HA
- 115. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Puppet module The node file Example in the node file dupont.pp postgres::createuser { ’tintin’: password => ’rmll2012’, host => ’192.168.142.30’, passwd => ’milou’, require => Exec[’/bin/sleep 10’], } postgres::createdb { ’moulinsart’: password => ’rmll2012’, host => ’192.168.142.30’, owner => ’tintin’, require => [Exec[’/bin/sleep 10’],Postgres::Createuser[’tintin’]], } postgres::createsuperuser { ’replicuser’: password => ’rmll2012’, host => ’192.168.142.30’, passwd => ’icanhazapassword’, require => Exec[’/bin/sleep 10’], } } Julien Pivotto PostgreSQL 9.0 HA
- 116. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Test it yourself You will need vagrant (http://vagrantup.com). Test-it-yourself howto $ git clone git://github.com/roidelapluie/postgres9-demo-vagrant.git $ cd postgres9-demo-vagrant $ git submodule update --init $ vagrant up Julien Pivotto PostgreSQL 9.0 HA
- 117. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Any questions? (I stay all the week @RMLL) Julien Pivotto PostgreSQL 9.0 HA
- 118. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end • Presentation made with latex-beamer • PostgreSQL logo is used following the policy http://wiki.postgresql.org/wiki/Trademark_Policy • Tango icons have been released into the public domain • Database icon is under CC BY-SA 3.0 http://dracos.deviantart.com/#/d2y5ele • RMLL logo is under CC BY-SA 3.0 http://2012.rmll.info/kit-media Julien Pivotto PostgreSQL 9.0 HA
- 119. ; Overview PostgreSQL 9.0 Clustering Backups and monitoring Automation The end Thank you Julien Pivotto PostgreSQL 9.0 HA