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bucardo使用指南

一、Bucardo简介

Bucardo是一款能在PostgreSQL 中实现双向同步的软件，可以实现更多的源数据库（即主数据库）以及更多的目标数据库（即备份数据库）之间的同步，Bucardo还可以复制到其他类型的目标数据库，其中包括MySQL、MariaDB、Oracle、SQLite、MongoDB和Redis。

Bucardo是异步同步，因此实现多Master方案时，只能做到数据的最终一致，Bucardo的同步通过触发器来记录变化，并利用PostgreSQL中的“NOTIFY”消息事件通知机制实现高效同步，所以同步很灵活，可以只同步数据库中选定的几张表，或者几个序列。

二、安装环境

2.1 系统

# cat /etc/issue

CentOS release 6.5 (Final)

Kernel \r on an \m

# uname –a

Linux localhost.localdomain 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

2.2 主机

IP地址数据目录用户名主机名

192.168.10.187 /data/pgdata pg95 db1

192.168.10.186 /data/pgdata pg95 db2

2.3 安装的依赖包

Test-Simple-1.302013_005

ExtUtils-MakeMaker-7.11_03

version-0.9912_01

DBI-1.634

DBD-Pg-3.5.3

DDBIx-Safe-1.2.5

三、安装postgresql

注意事项：./configure --prefix=/opt/pgsql9.5 --port=1995 --with-perl

执行该步骤时，必须带上—with-perl选项, 安装posrgresql-plperl。

四、安装依赖包

依赖包统一下载路径：/opt/software

#安装test-simple

cd /opt/software

wget http://search.cpan.org/CPAN/authors/id/E/EX/EXODIST/Test-Simple-1.302013_005.tar.gz

tar -zxvf Test-Simple-1.302013_005.tar.gz

cd Test-Simple-1.302013_005

perl Makefile.PL

make install

#安装ExtUtils-MakeMaker

cd /opt/software/

wget http://search.cpan.org/CPAN/authors/id/B/BI/BINGOS/ExtUtils-MakeMaker-7.11_03.tar.gz

tar -zxvf ExtUtils-MakeMaker-7.11_03.tar.gz

cd ExtUtils-MakeMaker-7.11_03

perl Makefile.PL

make

make install

#安装version

cd /opt/software/

wget http://search.cpan.org/CPAN/authors/id/J/JP/JPEACOCK/version-0.9912_01.tar.gz

tar -zxvf version-0.9912_01.tar.gz

cd version-0.9912_01

perl Makefile.PL

make

make install

#安装DBI

cd /opt/software/

wget http://search.cpan.org/CPAN/authors/id/T/TI/TIMB/DBI-1.634.tar.gz

tar -zxvf DBI-1.634.tar.gz

cd DBI-1.634

perl Makefile.PL

make

make install

#安装DBD-Pg

Source /home/pg95/.bash_profile #加载配置有PG环境变量的文件。

cd /opt/software/

wget http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBD-Pg-3.5.3.tar.gz

tar -zxvf DBD-Pg-3.5.3.tar.gz

cd DBD-Pg-3.5.3

perl Makefile.PL

make

make install

#安装DBIx-Safe

cd /opt/software

wget http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBIx-Safe-1.2.5.tar.gz

tar -zxvf DBIx-Safe-1.2.5.tar.gz

cd DBIx-Safe-1.2.5

perl Makefile.PL

make

make install

五、安装Bucardo

在db1上安装Bucardo

#安装bucardo

cd /opt/software/

wget http://bucardo.org/downloads/Bucardo-5.4.1.tar.gz

tar -zxvf Bucardo-5.4.1.tar.gz

cd Bucardo-5.4.1

export INSTALL_BUCARDODIR=/opt/bucardo

perl Makefile.PL

make

make install

六、配置Bucardo

6.1 初始化Bucardo管理库

mkdir -p /var/run/bucardo #建立Bucardo pid文件目录

chmod 777 /var/run/bucardo

su - pg95

切换到bucardo安装目录下，不然会报找不到bucardo.shema

cd /opt/bucardo

bucardo install –U pg95 –d postgres

显示如下：

This will install the bucardo database into an existing Postgres cluster.

Postgres must have been compiled with Perl support,

and you must connect as a superuser

Current connection settings:

1. Host: localhost

2. Port: 1995

3. User: postgres

4. Database: postgres

5. PID directory: /var/run/bucardo

Enter a number to change it, P to proceed, or Q to quit: 3

Change the user to: pg95

Changed user to: pg95

Current connection settings:

1. Host: localhost

2. Port: 1995

3. User: pg95

4. Database: postgres

5. PID directory: /var/run/bucardo

Enter a number to change it, P to proceed, or Q to quit: P

Postgres version is: 9.5

Creating superuser 'bucardo'

Attempting to create and populate the bucardo database and schema

ERROR: role "bucardo" already exists

STATEMENT: CREATE USER bucardo SUPERUSER;

ERROR: language "plpgsql" already exists

STATEMENT: CREATE LANGUAGE plpgsql;

Database creation is complete

Updated configuration setting "piddir"

Installation is now complete.

If you see errors or need help, please email [email protected]

You may want to check over the configuration variables next, by running:

bucardo show all

Change any setting by using: bucardo set foo=bar

查看引入的对象：

[pg95@localhost bucardo]$ psql bucardo bucardo

psql (9.5rc1)

Type "help" for help.

bucardo=# \d

List of relations

Schema | Name | Type | Owner

---------+-------------------------------+----------+---------

Bucardo | bucardo_config | table | bucardo

Bucardo | bucardo_custom_trigger | table | bucardo

Bucardo | bucardo_custom_trigger_id_seq | sequence | bucardo

bucardo | bucardo_log_message | table | bucardo

bucardo | bucardo_rate | table | bucardo

bucardo | clone | table | bucardo

bucardo | clone_id_seq | sequence | bucardo

bucardo | customcode | table | bucardo

bucardo | customcode_id_seq | sequence | bucardo

bucardo | customcode_map | table | bucardo

bucardo | customcols | table | bucardo

bucardo | customcols_id_seq | sequence | bucardo

bucardo | customname | table | bucardo

bucardo | customname_id_seq | sequence | bucardo

bucardo | db | table | bucardo

bucardo | db_connlog | table | bucardo

bucardo | dbgroup | table | bucardo

bucardo | dbmap | table | bucardo

bucardo | dbrun | table | bucardo

bucardo | goat | table | bucardo

bucardo | goat_id_seq | sequence | bucardo

bucardo | herd | table | bucardo

bucardo | herdmap | table | bucardo

bucardo | sync | table | bucardo

bucardo | syncrun | table | bucardo

bucardo | upgrade_log | table | bucardo

(26 rows)

bucardo=# \df

List of functions

Schema | Name | Result data type | Argument data types | Type

---------+----------------------------+------------------+---------------------+---------

bucardo | bucardo_delete_sync | trigger | | trigger

bucardo | bucardo_log_message_notify | trigger | | trigger

bucardo | bucardo_tablename_maker | text | text | normal

bucardo | check_bucardo_config | trigger | | trigger

bucardo | db_change | trigger | | trigger

bucardo | db_getconn | text | text | normal

bucardo | db_testconn | text | text | normal

bucardo | find_unused_goats | SETOF text | | normal

bucardo | herdcheck | trigger | | trigger

bucardo | magic_update | text | | normal

bucardo | plperlu_test | text | | normal

bucardo | table_exists | boolean | text, text | normal

bucardo | validate_all_syncs | integer | | normal

bucardo | validate_all_syncs | integer | integer | normal

bucardo | validate_goat | trigger | | trigger

bucardo | validate_sync | trigger | | trigger

bucardo | validate_sync | text | text | normal

bucardo | validate_sync | text | text, integer | normal

(18 rows)

bucardo=# \dL

List of languages

Name | Owner | Trusted | Description

---------+---------+---------+------------------------------

Plperlu | bucardo | f |

plpgsql | pg95 | t | PL/pgSQL procedural language

(2 rows)

6.2 修改环境变量

export PGHOME=/opt/pgsql9.5

export PATH=$PGHOME/bin:/opt/bucardo:$PATH:.

export PGDATA=/data/pgdata

export LD_LIBRARY_PATH=$PGHOME/lib:$LD_LIBRARY_PATH

七、测试

7.1 修改db1，db2数据库网络访问权限

分别修改数据库的postgresql.con,pg_hba.conf

db1，db2 postgresql.conf 修改如下：

# - Connection Settings -

listen_addresses = '*' # what IP address(es) to listen on;

# comma-separated list of addresses;

# defaults to 'localhost'; use '*' for all

# (change requires restart)

port = 1995 # (change requires restart)

max_connections = 100 # (change requires restart)

*为了方便测试，故db1,db2之间实现无密码登录，也可以通过.pgpass实现,也可以在

Bucardo 添加数据库的时候，指定pass参数。

db1 pg_hba.conf 修改如下：

在文件中添加：

host all all 192.168.10.186/32 trust

db2 pg_hba.conf 修改如下：

在文件中添加：

host all all 192.168.10.187/32 trust

修改完上述两个文件之后重启数据库。

/opt/pgsql9.5/bin/pg_ctl –D /data/pgdata restart

测试是否实现无密码登录：

在db1上

su pg95

source /home/pg95/.bash_profile

[pg95@localhost pgdata]$ psql -h 192.168.10.186

psql (9.5rc1)

Type "help" for help.

postgres=#

在db2上执行

[pg95@localhost pgdata]$ psql -h 192.168.10.186

psql (9.5rc1)

Type "help" for help.

postgres=#

执行上述命令。不需要输入登录密码即可访问对方数据库。

7.2 主从测试

7.2.1、分别在db1,db2上创建两个测试库。

db1上执行 creatdb masterdb

db2上执行 createdb slavedb

7.2.2、分别在 masterdb,slavedb中建立一个测试表。

所建立的表必须添加主键。如果不指定主键，bucardo添加table的时候会报错，无法添加。

db1上执行psql -d masterdb -c 'create table mstest(id int primary key,content text);'

db2上执行psql -d slavedb -c 'create table mstest(id int primary key,content text);'

7.2.3、添加复制数据库（在db1上执行操作）

[pg95@localhost bucardo]$ bucardo add db masterdb dbhost=127.0.0.1 dbport=1995 dbuser=pg95 dbname=masterdb

Added database "masterdb"

[pg95@localhost bucardo]$ bucardo add db slavedb dbhost=192.168.10.186 dbport=1995 dbuser=pg95 dbname=slavedb

Added database "slavedb"

*当添加的数据库IP地址错误或者数据库不存在时报如下错误：

[pg95@localhost bucardo]$ bucardo add db slave dbhost=192.168.30.186 dbport=1995 dbuser=pg95 dbname=slavedb

Connection to "slave" (PostgreSQL database) failed. You may force add it with the --force argument.

Error was: could not connect to server: No route to host

Is the server running on host "192.168.30.186" and accepting

TCP/IP connections on port 1995?

[pg95@localhost bucardo]$ bucardo add db slave dbhost=192.168.10.186 dbport=1995 dbuser=pg95 dbname=slave

Connection to "slave" (PostgreSQL database) failed. You may force add it with the --force argument.

Error was: FATAL: database "slave" does not exist

添加数据库后查看：

bucardo=# select * from db;

-[ RECORD 1 ]--------+------------------------------

name | masterdb

dbtype | postgres

dbhost | 127.0.0.1

dbport | 1995

dbname | masterdb

dbuser | pg95

dbpass |

dbconn |

dbservice |

pgpass |

status | active

server_side_prepares | t

makedelta | f

cdate | 2016-01-07 11:15:02.510795+08

-[ RECORD 2 ]--------+------------------------------

name | slavedb

dbtype | postgres

dbhost | 192.168.10.186

dbport | 1995

dbname | slavedb

dbuser | pg95

dbpass |

dbconn |

dbservice |

pgpass |

status | active

server_side_prepares | t

makedelta | f

cdate | 2016-01-07 11:16:13.717162+08

bucardo=# select * from db_connlog ;

-[ RECORD 1 ]-------------------------------------------------------------

db | masterdb

conndate | 2016-01-07 11:15:02.510795+08

connstring | dbi:Pg:dbname=masterdb;host=127.0.0.1;port=1995 user=pg95

status | good

version | 90500

-[ RECORD 2 ]-------------------------------------------------------------

db | slavedb

conndate | 2016-01-07 11:16:13.717162+08

connstring | dbi:Pg:dbname=slavedb;host=192.168.10.186;port=1995 user=pg95

status | good

version | 90500

7.2.4、添加需要同步的表（在db1上执行操作）

[pg95@localhost bucardo]$ bucardo add table public.mstest db=masterdb

Added the following tables or sequences:

public.mstest

7.2.5、添加表群组

bucardo add herd herd1 public.mstest

Created relgroup "herd1"

The following tables or sequences are now part of the relgroup "herd1":

public.mstest

或者使用以下命令也可以

bucardo add relgroup herd1 public.mstest

Created relgroup "herd1"

The following tables or sequences are now part of the relgroup "herd1":

public.mstest

添加后查看：

bucardo=# select * from herd;

name | about | cdate

-------------+-------+-------------------------------

ms_relgroup | | 2016-01-07 13:42:35.503979+08

(1 row)

bucardo=# select * from herdmap ;

herd | goat | priority | cdate

-------------+------+----------+-------------------------------

ms_relgroup | 1 | 0 | 2016-01-07 13:42:35.503979+08

(1 row)

7.2.6、添加数据库群组

[pg95@localhost bucardo]$ bucardo add dbgroup ms_dbgroup masterdb:source slavedb:target

Created dbgroup "ms_dbgroup"

Added database "masterdb" to dbgroup "ms_dbgroup" as source

Added database "slavedb" to dbgroup "ms_dbgroup" as target

添加后查看：

bucardo=# select * from dbgroup;

name | about | cdate

------------+-------+-------------------------------

ms_dbgroup | | 2016-01-07 13:43:21.071796+08

(1 row)

7.2.7、添加同步

bucardo add sync ms_sync relgroup=ms_relgroup dbs=ms_dbgroup

Added sync "ms_sync"

当mstest表不存在是报如下错误：

[pg95@localhost bucardo]$ bucardo add sync ms_sync relgroup=ms_relgroup dbs=ms_dbgroup

WARNING: Issuing rollback() due to DESTROY without explicit disconnect() of DBD::Pg::db handle dbname=slavedb;host=192.168.10.186;port=1995 at line 1018.

CONTEXT: PL/Perl function "validate_sync"

SQL statement "SELECT validate_sync('ms_sync')"

PL/Perl function "validate_sync"

Failed to add sync: DBD::Pg::st execute failed: ERROR: Could not find "mstest" inside the "public" schema on database "slavedb"! at line 30.

CONTEXT: PL/Perl function "validate_sync" at /opt/bucardo/bucardo line 4612.

添加后查看：

bucardo=# select * from sync;

-[ RECORD 1 ]------+------------------------------

name | ms_sync

herd | ms_relgroup

dbs | ms_dbgroup

stayalive | t

kidsalive | t

conflict_strategy | bucardo_latest

copyextra |

deletemethod | delete

autokick | t

checktime |

status | active

rebuild_index | 0

priority | 0

analyze_after_copy | t

vacuum_after_copy | f

strict_checking | t

overdue | 00:00:00

expired | 00:00:00

track_rates | f

onetimecopy | 0

lifetime |

maxkicks | 0

isolation_level |

cdate | 2016-01-07 13:49:05.463634+08

[pg95@localhost bucardo]$ bucardo list sync

Sync "ms_sync" Relgroup "ms_relgroup" [Active]

DB group "ms_dbgroup" masterdb:source slavedb:target

[pg95@localhost bucardo]$ bucardo list dbs

Database: masterdb Status: active Conn: psql -p 1995 -U pg95 -d masterdb -h 127.0.0.1

Database: slavedb Status: active Conn: psql -p 1995 -U pg95 -d slavedb -h 192.168.10.186

[pg95@localhost bucardo]$ bucardo list herd[relgroups/herd/relgroup]

Relgroup: ms_relgroup DB: masterdb Members: public.mstest

Used in syncs: ms_sync

[pg95@localhost bucardo]$ bucardo list tables[table]

1. Table: public.mstest DB: masterdb PK: id (integer)

7.2.8 启动bucardo

bucardo start

Checking for existing processes

Starting Bucardo

[pg95@localhost bucardo]$ ps -ef | grep Bucardo | grep -v "grep"

pg95 4395 1 0 13:54 ? 00:00:01 Bucardo Master Control Program v5.4.1. Active syncs: ms_sync

pg95 4400 4395 0 13:54 ? 00:00:00 Bucardo VAC.

pg95 4403 4395 0 13:54 ? 00:00:01 Bucardo Controller. Sync "ms_sync" for relgroup "ms_relgroup" to dbs "ms_dbgroup"

pg95 4406 4403 0 13:54 ? 00:00:00 Bucardo Kid. Sync "ms_sync"

7.2.9 数据测试

在masterdb中插入数据

[pg95@localhost bucardo]$ psql masterdb

psql (9.5rc1)

Type "help" for help.

masterdb=# insert into mstest values (1,'test100');

INSERT 0 1

masterdb=# select * from mstest ;

id | content

----+---------

1 | test100

(1 row)

查询slavedb中查询数据

[pg95@localhost ~]$ psql slavedb

psql (9.5rc1)

Type "help" for help.

slavedb=# select * from mstest ;

id | content

----+---------

1 | test100

(1 row)

在masterdb中删除数据

masterdb=# select * from mstest ;

id | content

----+---------

1 | test100

(1 row)

masterdb=# delete from mstest where id=1;

DELETE 1

masterdb=# select * from mstest ;

id | content

----+---------

(0 rows)

在slavedb中查看数据

slavedb=# select * from mstest ;

id | content

----+---------

(0 rows)

在masterdb中修改数据

masterdb=# select * from mstest ;

id | content

----+---------

1 | test100

2 | test200

3 | test300

(3 rows)

masterdb=# update mstest set content='updatetest100' where id=1;

UPDATE 1

masterdb=# select * from mstest ;

id | content

----+---------------

2 | test200

3 | test300

1 | updatetest100

(3 rows)

查看slavedb的数据

slavedb=# select * from mstest ;

id | content

----+---------------

2 | test200

3 | test300

1 | updatetest100

(3 rows)

查看同步状态:

[pg95@localhost bucardo]$ bucardo status

PID of Bucardo MCP: 4395

Name State Last good Time Last I/D Last bad Time

=========+========+============+========+===========+===========+=======

ms_sync | Good | 14:42:24 | 4m 16s | 1/1 | none |

同时可以暂停唤醒停止同步

[pg95@localhost bucardo]$ bucardo pause ms_sync

Syncs paused: ms_sync

[pg95@localhost bucardo]$ bucardo resume ms_sync

Syncs resumed: ms_sync

[pg95@localhost bucardo]$ bucardo stop

Creating /var/run/bucardo/fullstopbucardo ... Done

7.2.10 撤除与搭建同步的过程相反

移除同步

[pg95@localhost bucardo]$ bucardo remove sync ms_sync

Removed sync "ms_sync"

Note: table triggers (if any) are not automatically removed!

移除数据库组

[pg95@localhost bucardo]$ bucardo remove dbgroup ms_dbgroup

Removed dbgroup "ms_dbgroup"

移除表集群

[pg95@localhost bucardo]$ bucardo remove relgroup ms_relgroup

Removed relgroup "ms_relgroup"

移除同步的表

[pg95@localhost bucardo]$ bucardo remove table public.mstest

Removed the following tables:

public.mstest

移除数据库

[pg95@localhost bucardo]$ bucardo remove db masterdb slavedb

Removed database "masterdb"

Removed database "slavedb"

至此：使用Bucardo搭建主从同步完成。

至此：使用Bucardo主从同步的搭建和撤出已经完成。

7.3 主主测试

7.3.1 分别在db1,db2一个数据库master1,master2及测试表

db1 [pg95@localhost ~]$ createdb masterdb0

db2 [pg95@localhost ~]$ createdb masterdb1

db1 psql -d masterdb0 -c 'create table mmtest(id int primary key,content text);'

db2 psql -d masterdb1 -c 'create table mmtest(id int primary key,content text);'

7.3.2 在bucardo中添加数据库(db1上执行)

[pg95@localhost ~]$ bucardo add db masterdb0 dbhost=127.0.0.1 dbport=1995 dbuser=pg95 dbname=masterdb0

Added database "masterdb0"

[pg95@localhost ~]$ bucardo add db masterdb1 dbhost=192.168.10.186 dbport=1995 dbuser=pg95 dbname= masterdb1

Added database "masterdb1"

7.3.3 添加需要同步的表

[pg95@localhost ~]$ bucardo add table public.mmtest db=masterdb0

Added the following tables or sequences:

public.mmtest

7.3.4 添加同步表集群

[pg95@localhost ~]$ bucardo add relgroup mm_relgoup public.mmtest

Created relgroup "mm_relgoup"

The following tables or sequences are now part of the relgroup "mm_relgoup":

public.mmtest

7.3.5添加数据库群组

[pg95@localhost ~]$ bucardo add dbgroup mm_dbgroup masterdb0:source masterdb1:source

Created dbgroup "mm_dbgroup"

Added database "masterdb0" to dbgroup "mm_dbgroup" as source

Added database "masterdb1" to dbgroup "mm_dbgroup" as source

7.3.6 添加同步

[pg95@localhost ~]$ bucardo add sync mm_sync relgroup=mm_relgroup dbs=mm_dbgroup

Added sync "mm_sync"

7.3.7 启动同步

[pg95@localhost ~]$ bucardo start

Checking for existing processes

Removing file "/var/run/bucardo/fullstopbucardo"

Starting Bucardo

7.3.8 数据测试

在master0上和master1上分别进行数据的增删改查。

增加数据

masterdb0=# select * from mmtest;

id | content

----+---------

1 | test100

(1 row)

masterdb0=# insert into mmtest values (2,'test200');

INSERT 0 1

masterdb0=# select * from mmtest;

id | content

----+---------

1 | test100

2 | test200

(2 rows)

删除数据

masterdb1=# select * from mmtest ;

id | content

----+---------

1 | test100

2 | test200

(2 rows)

masterdb1=# delete from mmtest where id=1;

DELETE 1

masterdb1=# select * from mmtest ;

id | content

----+---------

2 | test200

(1 row)

masterdb0=# select * from mmtest;

id | content

----+---------

2 | test200

(1 row)

修改数据

masterdb1=# select * from mmtest ;

id | content

----+---------

2 | test200

(1 row)

masterdb1=# update mmtest set content='updatetest200' where id=2;

UPDATE 1

masterdb1=# select * from mmtest ;

id | content

----+---------------

2 | updatetest200

(1 row)

masterdb0=# select * from mmtest;

id | content

----+---------------

2 | updatetest200

(1 row)

至此主主测试完成。

7.4 多主测试（4主库）

7.4.1 建立数据库和同步表

db1上操作

[pg95@localhost ~]$ createdb master0

[pg95@localhost ~]$ createdb master1

[pg95@localhost ~]$ psql -d master0 -c 'create table mutitest(id int primary key,content text);'

CREATE TABLE

[pg95@localhost ~]$ psql -d master1 -c 'create table mutitest(id int primary key,content text);'

CREATE TABLE

db2上操作

[pg95@localhost ~]$ createdb master2

[pg95@localhost ~]$ createdb master3

[pg95@localhost ~]$ psql -d master2 -c 'create table mutitest(id int primary key,content text);'

CREATE TABLE

[pg95@localhost ~]$ psql -d master3 -c 'create table mutitest(id int primary key,content text);'

CREATE TABLE

7.4.2 在bucardo中添加数据库(db1上操作)

[pg95@localhost ~]$ bucardo add db masterdb0 dbhost=127.0.0.1 dbuser=pg95 dbport=1995 dbname=master0

Added database "masterdb0"

[pg95@localhost ~]$ bucardo add db masterdb1 dbhost=127.0.0.1 dbuser=pg95 dbport=1995 dbname=master1

Added database "masterdb1"

[pg95@localhost ~]$ bucardo add db masterdb2 dbhost=192.168.10.186 dbuser=pg95 dbport=1995 dbname=master2

Added database "masterdb2"

[pg95@localhost ~]$ bucardo add db masterdb3 dbhost=192.168.10.186 dbuser=pg95 dbport=1995 dbname=master3

Added database "masterdb3"

7.4.3 添加需要同步的表

[pg95@localhost ~]$ bucardo add table public.mutitest db=masterdb0

Added the following tables or sequences:

public.mutitest

7.4.4 添加表集群

[pg95@localhost ~]$ bucardo add relgroup muti_relgroup public.mutitest

Created relgroup "muti_relgroup"

The following tables or sequences are now part of the relgroup "muti_relgroup":

public.mutitest

7.4.5 添加数据库集群

[pg95@localhost ~]$ bucardo add dbgroup muti_dbgroup masterdb0:source masterdb1:source masterdb2:source masterdb3:source

Created dbgroup "muti_dbgroup"

Added database "masterdb0" to dbgroup "muti_dbgroup" as source

Added database "masterdb1" to dbgroup "muti_dbgroup" as source

Added database "masterdb2" to dbgroup "muti_dbgroup" as source

Added database "masterdb3" to dbgroup "muti_dbgroup" as source

7.4.6 添加同步

[pg95@localhost ~]$ bucardo add sync muti_sync relgroup=muti_relgroup dbs=muti_dbgroup

Added sync "muti_sync"

7.4.7 启动bucardo

[pg95@localhost ~]$ bucardo start

Checking for existing processes

Removing file "/var/run/bucardo/fullstopbucardo"

Starting Bucardo

7.4.8 数据测试

插入数据

master1=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

(1 row)

master1=# insert into mutitest values (2,'mutitest200');

INSERT 0 1

master1=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

(2 rows)

master1=# \c master0

You are now connected to database "master0" as user "pg95".

master0=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

(2 rows)

master0=# insert into mutitest values (3,'mutitest300');

INSERT 0 1

master0=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

3 | mutitest300

(3 rows)

master0=# \c master0

You are now connected to database "master0" as user "pg95".

master0=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

3 | mutitest300

(3 rows)

master3=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

3 | mutitest300

(3 rows)

master3=# insert into mutitest values (4,'test400');

INSERT 0 1

master3=# \c master2

You are now connected to database "master2" as user "pg95".

master2=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

3 | mutitest300

4 | test400

(4 rows)

删除数据

master2=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

2 | mutitest200

3 | mutitest300

4 | test400

(4 rows)

master2=# delete from mutitest where id=2;

DELETE 1

master2=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

3 | mutitest300

4 | test400

(3 rows)

master2=# \c master3

You are now connected to database "master3" as user "pg95".

master3=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

3 | mutitest300

4 | test400

(3 rows)

master0=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

3 | mutitest300

4 | test400

(3 rows)

master0=# \c master1

You are now connected to database "master1" as user "pg95".

master1=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

3 | mutitest300

4 | test400

(3 rows)

修改数据

master1=# select * from mutitest ;

id | content

----+-------------

1 | mutitest100

3 | mutitest300

4 | test400

(3 rows)

master1=# update mutitest set content='updatetest400' where id=4;

UPDATE 1

master1=# select * from mutitest ;

id | content

----+---------------

1 | mutitest100

3 | mutitest300

4 | updatetest400

(3 rows)

master1=# \c master0

You are now connected to database "master0" as user "pg95".

master0=# select * from mutitest ;

id | content

----+---------------

1 | mutitest100

3 | mutitest300

4 | updatetest400

(3 rows)

master3=# select * from mutitest ;

id | content

----+---------------

1 | mutitest100

3 | mutitest300

4 | updatetest400

(3 rows)

master3=# \c master2

You are now connected to database "master2" as user "pg95".

master2=# select * from mutitest ;

id | content

----+---------------

1 | mutitest100

3 | mutitest300

4 | updatetest400

(3 rows)

至此多主复制搭建完成。

7.5 多主多从测试

1、添加数据库

数据库列表：

[pg95@localhost ~]$ bucardo list db

Database: masterdb0 Status: active Conn: psql -p 1995 -U pg95 -d master0 -h 127.0.0.1

Database: masterdb1 Status: active Conn: psql -p 1995 -U pg95 -d master1 -h 127.0.0.1

Database: masterdb2 Status: active Conn: psql -p 1995 -U pg95 -d master2 -h 192.168.10.186

Database: masterdb3 Status: active Conn: psql -p 1995 -U pg95 -d master3 -h 192.168.10.186

Database: slavedb0 Status: active Conn: psql -p 1995 -U pg95 -d slave0 -h 127.0.0.1

Database: slavedb1 Status: active Conn: psql -p 1995 -U pg95 -d slave1 -h 127.0.0.1

Database: slavedb2 Status: active Conn: psql -p 1995 -U pg95 -d slave2 -h 192.168.10.186

Database: slavedb3 Status: active Conn: psql -p 1995 -U pg95 -d slave3 -h 192.168.10.186

2、添加同步表

[pg95@localhost ~]$ bucardo add table public.mutitest db=masterdb0

Added the following tables or sequences:

public.mutitest

3、添加表集群

[pg95@localhost ~]$ bucardo add relgroup mutims_relgroup public.mutitest

Created relgroup "mutims_relgroup"

The following tables or sequences are now part of the relgroup "mutims_relgroup":

public.mutitest

4、添加数据库集群

[pg95@localhost ~]$ bucardo add dbgroup mutims_dbgroup masterdb0:source masterdb1:source masterdb2:source masterdb3:source slavedb0:target slavedb1:target slavedb2:target slavedb3:target

Created dbgroup "mutims_dbgroup"

Added database "masterdb0" to dbgroup "mutims_dbgroup" as source

Added database "masterdb1" to dbgroup "mutims_dbgroup" as source

Added database "masterdb2" to dbgroup "mutims_dbgroup" as source

Added database "masterdb3" to dbgroup "mutims_dbgroup" as source

Added database "slavedb0" to dbgroup "mutims_dbgroup" as target

Added database "slavedb1" to dbgroup "mutims_dbgroup" as target

Added database "slavedb2" to dbgroup "mutims_dbgroup" as target

Added database "slavedb3" to dbgroup "mutims_dbgroup" as target

5、添加同步

[pg95@localhost ~]$ bucardo add sync mutims_sync relgroup=mutims_relgroup dbs=mutims_dbgroup

Added sync "mutims_sync"

6 启动bucardo

[pg95@localhost ~]$ bucardo start

Checking for existing processes

Removing file "/var/run/bucardo/fullstopbucardo"

Starting Bucardo

7 数据测试。

省略。（测试通过）

8、bucardo测试用例结构

[pg95@localhost ~]$ bucardo list all

-- dbgroups:

dbgroup: mutims_dbgroup Members: masterdb0:source masterdb1:source masterdb2:source masterdb3:source slavedb0:target slavedb1:target slavedb2:target slavedb3:target

-- databases: