pgbouncer+pg(fdw)+pg(datanode)分表方案

pgbouncer+pg(fdw)+pg(datanode)分表方案

(环境RHEL6.5,PG9.4.5,pgbouncer1.5.4,libevent2.0.22)

方案架构图如下：

pgbouncer+pg(fdw)+pg(datanode)分表方案架构图

(pgbouncer,PG(FDW)所在的机器为192.168.0.106，PG1所在的机器为192.168.0.108，PG2所在的机器为192.168.0.109)

在192.168.0.106，192.168.0.108，192.168.0.109三台机器上安装并配置PG9.4.5

1 从http://www.postgresql.org/ftp/source/v9.4.5/下载PG9.4.5到Linux的/opt/soft_bak/目录

1.1安装PG所需要的依赖软件包

yum -y install readline-devel zlib zlib-devel openssl openssl-devel gcc make flex bison

1.2解压并安装PG9.4.5

tar zxvf postgresql-9.4.5.tar.gz

cd postgresql-9.4.5

./configure

gmake world

gmake install-world

1.3 更改pgsql文件夹的所属主

chown –R postgres /usr/local/pgsql/

su - postgres

1.4 在/usr/local/pgsql/目录下创建data目录

mkdir data

1.5 初始化PG数据库集群

cd /usr/local/pgsql/bin

./initdb –D ../data

1.6 修改PG的配置文件

修改postgresql.conf

listen_addresses = '*'

port = 5432

在pg_hba.conf文件中添加如下语句

host    all             all             192.168.0.0/24          trust

1.7启动PG数据库

cd /usr/local/pgsql/bin

./pg_ctl –D ../data start

2在192.168.0.106上安装及配置libevent

2.1从http://libevent.org/下载稳定版本的libevent（libevent-2.0.22-stable.tar.gz）到Linux的/opt/soft_bak/目录下

2.2 解压并安装libevent

tar zxvf libevent-2.0.22-stable.tar.gz

cd /opt/soft_bak/libevent-2.0.22-stable

./configure –prefix=/home/postgres/libevent

make

make install

2.3 在/etc/profile文件中加入如下命令并保存

export LD_LIBRARY_PATH=/home/postgres/libevent/lib:$LD_LIBRARY_PATH

2.4使更改的profile生效

source /etc/profile

3 在192.168.0.106上安装并配置pgbouncer

3.1 从http://pgfoundry.org/projects/pgbouncer下载 pgbouncer(pgbouncer-1.5.4.tar.gz) 到Linux的/opt/soft_bak/目录下

3.2 解压并安装pgbouncer

tar zxvf pgbouncer-1.5.4.tar.gz

cd /opt/soft_bak/pgbouncer-1.5.4

./configure --prefix= /home/postgres/pgbouncer --with- libevent= /home/postgres/libevent

make

make install

3.3配置pgbouncer

在/home/postgres/pgbouncer/目录下创建pgbouncer目录config（postgres用户）

mkdir config

3.4复制pgbouncer配置文件及用户列表文件到/home/postgres/pgbouncer/config

cp /home/postgres/pgbouncer/share/doc/pgbouncer/pgbouncer.ini userlist.txt /home/postgres/pgbouncer/config

3.5配置pgbouncer.ini文件

[databases]

bouncerdb  = host=127.0.0.1 port=5432 dbname=bouncerdb user=postgres password=postgres

[pgbouncer]

logfile = /home/postgres/pgbouncer/pgbouncer.log

pidfile = /home/postgres/pgbouncer/pgbouncer.pid

listen_addr = *

listen_port = 1999

auth_type = trust

auth_file = /home/postgres/pgbouncer/config/userlist.txt

admin_users = postgres

stats_users = postgres

pool_mode = transaction

server_reset_query = DISCARD ALL

max_client_conn = 100

default_pool_size = 20

3.6配置用户密码文件userlist.txt

"postgres" "postgres"

4 使用pgbouncer

在pgbouncer pg（fdw）创建bouncerdb，用于连接

create database bouncerdb;

在pgbouncer.ini中配置连接 数据库为bouncerdb

4.1启动pgbouncer

[postgres@rhel65 bin]$ ./pgbouncer -d /home/postgres/pgbouncer/config/pgbouncer.ini

2015-11-18 15:35:13.609 2014 LOG File descriptor limit: 1024 (H:4096), max_client_conn: 100, max fds possible: 130

2015-11-18 15:35:13.610 2014 LOG Stale pidfile, removing

[root@rhel65 config]# ps -ef|grep pgbouncer

postgres  2016     1  0 15:35 ?        00:00:00 ./pgbouncer -d /home/postgres/pgbouncer/config/pgbouncer.ini

root      2020  1221  0 15:37 pts/1    00:00:00 grep pgbouncer

[root@rhel65 config]#

4.2使用pgbouncer连接

[postgres@rhel65 bin]$ ./psql -h 127.0.0.1 -p 1999 pgbouncer

psql (9.4.5, server 1.5.4/bouncer)

Type "help" for help.

pgbouncer=# show help;

NOTICE:  Console usage

DETAIL:

SHOW HELP|CONFIG|DATABASES|POOLS|CLIENTS|SERVERS|VERSION

SHOW STATS|FDS|SOCKETS|ACTIVE_SOCKETS|LISTS|MEM

SHOW DNS_HOSTS|DNS_ZONES

SET key = arg

RELOAD

PAUSE [<db>]

RESUME [<db>]

KILL <db>

SUSPEND

SHUTDOWN

SHOW

[postgres@rhel65 bin]$ ./psql -h 127.0.0.1 -p 1999 -U postgres -d bouncerdb

psql (9.4.5)

Type "help" for help.

bouncerdb=#

4.3在数据库192.168.0.108的PG数据库上创建数据库db108并创建测试表schema_db108.user_info108

postgres=# create database db108;

CREATE DATABASE

postgres=# \c db108

You are now connected to database "db108" as user "postgres".

db108=# create schema schema_db108;

CREATE SCHEMA

db108=# create table schema_db108.user_info108(userid int,name text,crt_time timestamp without time zone);

CREATE TABLE

4.4在数据库192.168.0.109的PG数据库上创建数据库db109并创建测试表schema_db109.user_info109

-bash-4.2$ ./psql

psql (9.4.5)

Type "help" for help.

postgres=# create database db109;

CREATE DATABASE

postgres=# \c db109

You are now connected to database "db109" as user "postgres".

db109=# create schema schema_db109;

CREATE SCHEMA

db109=# create table schema_db109.user_info109(userid int,name text,crt_time timestamp without time zone);

CREATE TABLE

db109=#

4.5在192.168.0.106的数据库bouncerdb上创建postgres_fdw

[postgres@rhel65 bin]$ ./psql -h 127.0.0.1 -p 1999 -U postgres -d bouncerdb

psql (9.4.5)

Type "help" for help.

bouncerdb=# create extension postgres_fdw;

CREATE EXTENSION

4.6在192.168.0.106上为192.168.0.108的db108数据库创建外部服务器s108

bouncerdb=# CREATE SERVER s108  FOREIGN DATA WRAPPER postgres_fdw;

CREATE SERVER

bouncerdb=# select * from pg_foreign_server;

srvname | srvowner | srvfdw | srvtype | srvversion | srvacl | srvoptions

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

s108    |       10 |  16388 |         |            |        |

(1 row)

bouncerdb=# alter server s108 options ( add hostaddr '192.168.0.108', add port '5432', add dbname 'db108');

ALTER SERVER

4.7为用户授权

bouncerdb=# grant usage on foreign server s108 to postgres;

GRANT

bouncerdb=# select * from pg_foreign_server ;

srvname | srvowner | srvfdw | srvtype | srvversion |        srvacl         |                   srvoptions

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

s108    |       10 |  16388 |         |            | {postgres=U/postgres} | {hostaddr=192.168.0.108,port=5432,dbname=db108}

(1 row)

4.8为外部服务器s108创建用户映射

bouncerdb=# create user mapping for postgres server s108 options(user 'postgres',password 'postgres');

CREATE USER MAPPING

4.9为108的数据库db108中的表schema_db108.user_info108(userid int,name text,crt_time timestamp without time zone)创建外部表

bouncerdb=# create foreign table ft_user_info108(userid int,name text,crt_time timestamp without time zone)

server s108 options(schema_name 'schema_db108',table_name 'user_info108');

CREATE FOREIGN TABLE

4.10通过外部表向表中插入数据；

bouncerdb=# insert into ft_user_info108 (userid,name,crt_time)

bouncerdb-# select generate_series(1,100000),'abcdef',clock_timestamp();

INSERT 0 100000

bouncerdb=# select * from ft_user_info108 limit 5;

userid |  name  |          crt_time

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

1 | abcdef | 2015-11-18 17:08:52.489583

2 | abcdef | 2015-11-18 17:08:52.491158

3 | abcdef | 2015-11-18 17:08:52.491548

4 | abcdef | 2015-11-18 17:08:52.491899

5 | abcdef | 2015-11-18 17:08:52.492339

(5 rows)

4.11在108的db108数据库中查看数据：

db108=# select * from schema_db108.user_info108 limit 5 ;

userid |  name  |          crt_time

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

1 | abcdef | 2015-11-18 17:08:52.489583

2 | abcdef | 2015-11-18 17:08:52.491158

3 | abcdef | 2015-11-18 17:08:52.491548

4 | abcdef | 2015-11-18 17:08:52.491899

5 | abcdef | 2015-11-18 17:08:52.492339

(5 rows)

5.1在192.168.0.106上为192.168.0.109的数据库db109创建外部服务器s109

bouncerdb=# CREATE SERVER s109  FOREIGN DATA WRAPPER postgres_fdw;

CREATE SERVER

bouncerdb=# select * from pg_foreign_server;

srvname | srvowner | srvfdw | srvtype | srvversion |        srvacl         |                   srvoptions

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

s108    |       10 |  16388 |         |            | {postgres=U/postgres} | {hostaddr=192.168.0.108,port=5432,dbname=db108}

s109    |       10 |  16388 |         |            |                       |

(2 rows)

bouncerdb=# alter server s109 options ( add hostaddr '192.168.0.109', add port '5432', add dbname 'db109');

ALTER SERVER

5.2为用户授权

bouncerdb=# grant usage on foreign server s109 to postgres;

GRANT

bouncerdb=#  select * from pg_foreign_server ;

srvname | srvowner | srvfdw | srvtype | srvversion |        srvacl         |                   srvoptions

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

s108    |       10 |  16388 |         |            | {postgres=U/postgres} | {hostaddr=192.168.0.108,port=5432,dbname=db108}

s109    |       10 |  16388 |         |            | {postgres=U/postgres} | {hostaddr=192.168.0.109,port=5432,dbname=db109}

(2 rows)

5.3创建用户映射

bouncerdb=# create user mapping for postgres server s109 options(user 'postgres',password 'postgres');

CREATE USER MAPPING

5.4为109的数据库db109中的表schema_db109.user_info109(userid int,name text,crt_time timestamp without time zone)创建外部表

bouncerdb=# create foreign table ft_user_info109(userid int,name text,crt_time timestamp without time zone)

server s109 options(schema_name 'schema_db109',table_name 'user_info109');

CREATE FOREIGN TABLE

5.5通过外部表向表中插入数据；

bouncerdb=# insert into ft_user_info109 (userid,name,crt_time)

select generate_series(1,100000),'abcdef',clock_timestamp();

INSERT 0 100000

bouncerdb=# select * from ft_user_info109 limit 5;

userid |  name  |          crt_time

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

1 | abcdef | 2015-11-18 17:18:06.431162

2 | abcdef | 2015-11-18 17:18:06.43275

3 | abcdef | 2015-11-18 17:18:06.43334

4 | abcdef | 2015-11-18 17:18:06.433895

5 | abcdef | 2015-11-18 17:18:06.434497

(5 rows)

5.6在192.168.0.109的db109中查看数据：

db109=# select * from schema_db109.user_info109 limit 5;

userid |  name  |          crt_time

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

1 | abcdef | 2015-11-18 17:18:06.431162

2 | abcdef | 2015-11-18 17:18:06.43275

3 | abcdef | 2015-11-18 17:18:06.43334

4 | abcdef | 2015-11-18 17:18:06.433895

5 | abcdef | 2015-11-18 17:18:06.434497

(5 rows)