Skytools安装配置管理（四）

2.4.1.3 创建函数

[postgres@localhost~]$ cd /opt/pg93/share/extension/

[postgres@localhostextension]$ psql part_root < hashlib--1.0.sql

CREATE FUNCTION

[postgres@localhostextension]$ psql part_part0 < hashlib--1.0.sql

[postgres@localhostextension]$ psql part_part1 < hashlib--1.0.sql

part_root=# \df

Listof functions

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

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

public | hash128_string | bytea | bytea,text | normal

public | hash_string | integer | text,SimSun;vertical-align:baseline;">(19 rows)

2.4.1.4 创建扩展

[postgres@localhostextension]$ psql part_root -c 'create extension hashlib'

CREATE EXTENSION

[postgres@localhostextension]$ psql part_part0 -c 'create extension hashlib'

[postgres@localhostextension]$ psql part_part1 -c 'create extension hashlib'

part_root=# \dx

Listof installed extensions

Name |Version | Schema | Description

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

hashlib | 1.1 | public | Stable hash functions

plpgsql | 1.0 | pg_catalog | PL/pgsql procedural language

(2 rows)

2.4.2 基础配置

2.4.2.1 配置数据库连接进程信息

[postgres@localhostconf]$ cat part_root.ini

[londiste3]

job_name = part_root

db = dbname=part_root

queue_name = replika

logfile = /opt/skytools/londiste/log/part_root.log

pidfile = /opt/skytools/londiste/pid/part_root.pid

[postgres@localhostconf]$ cat part_part0.ini

job_name = part_part0

db = dbname=part_part0

logfile = /opt/skytools/londiste/log/part_part0.log

pidfile = /opt/skytools/londiste/pid/part_part0.pid

[postgres@localhostconf]$ cat part_part1.ini

job_name = part_part1

db = dbname=part_part1

logfile = /opt/skytools/londiste/log/part_part1.log

pidfile = /opt/skytools/londiste/pid/part_part1.pid

2.4.2.2 创建root节点（node1）并启动worker

[postgres@localhostconf]$ londiste3 part_root.ini create-root node1 dbname=part_root

2013-10-11 15:07:24,186 29307 WARNING No host= in public connect string,bad idea

sql is installed

sql

2013-10-11 15:07:25,350 29307 INFO pgq.get_batch_cursor is installed

sql

2013-10-11 15:07:26,126 29307 INFO Installing londiste

sql

[postgres@localhostconf]$ londiste3 -d part_root.ini worker

[postgres@localhostconf]$ ps -ef | grep worker

postgres 29327 1 0 15:08 ? 00:00:00 /opt/python25/bin/python /opt/skytools/bin/londiste3 -d part_root.ini worker

postgres 29335 27861 0 15:08 pts/2 00:00:00 grep worker

2.4.2.3 创建leaf1节点（node2_0）并启动worker

[postgres@localhostconf]$ londiste3 part_part0.ini create-leaf node2_0 dbname=part_part0 --provider=dbname=part_root

2013-10-11 15:09:33,157 29361 WARNING No host= in public connect string,165 29361 INFO plpgsql is installed

sql

2013-10-11 15:09:34,301 29361 INFO pgq.get_batch_cursor is installed

sql

2013-10-11 15:09:36,634 29361 INFO londiste.global_add_table is installed

2013-10-11 15:09:37,523 29361 INFO Initializing node

2013-10-11 15:09:39,935 29361 INFO Location registered

2013-10-11 15:09:40,254 29361 INFO Location registered

2013-10-11 15:09:41,001 29361 INFO Done

[postgres@localhostconf]$ londiste3 -d part_part0.ini worker

2.4.2.4 创建leaf2节点（node2_1）并启动worker

[postgres@localhostconf]$ londiste3 part_part1.ini create-leaf node2_1 dbname=part_part1 --provider=dbname=part_root

2013-10-11 15:10:05,861 29380 WARNING No host= in public connect string,867 29380 INFO plpgsql is installed

sql

2013-10-11 15:10:07,291 29380 INFO pgq.get_batch_cursor is installed

sql

2013-10-11 15:10:08,319 29380 INFO londiste.global_add_table is installed

2013-10-11 15:10:10,610 29380 INFO Location registered

2013-10-11 15:10:11,041 29380 INFO Node "node2_1" initialized for queue "replika" with type "leaf"

[postgres@localhostconf]$ londiste3 -d part_part1.ini worker

postgres 29397 1 0 15:10 ? 00:00:00 /opt/python25/bin/python /opt/skytools/bin/londiste3 -d part_part1.ini worker

postgres 29403 1 0 15:10 ? 00:00:00 /opt/python25/bin/python /opt/skytools/bin/londiste3 -d part_part0.ini worker

postgres 29412 27861 0 15:10 pts/2 00:00:00 grep worker

2.4.2.5 配置ticker并启动

[postgres@localhostconf]$ cat pgqd.ini

[pgqd]

logfile = /opt/skytools/londiste/log/pgqd.log

pidfile = /opt/skytools/londiste/pid/pgqd.pid

[postgres@localhostconf]$ pgqd -d pgqd.ini

2013-10-11 15:12:42.278 29452 LOG Starting pgqd 3.1.5

[postgres@localhostconf]$ ps -ef | grep pgqd

postgres 29454 1 0 15:12 ? 00:00:00 pgqd -d pgqd.ini

postgres 29469 27861 0 15:12 pts/2 00:00:00 grep pgqd

2.4.3 在node1上创建同步表

part_root=# create table t1(id integer primary key);

CREATE TABLE

part_root=# insert into t1 values (1);

INSERT 0 1

part_root=# insert into t1 values (2);

part_root=# select * from t1;

----

2.4.4 向root与leaf节点添加复制表

[postgres@localhostconf]$ londiste3 part_root.ini add-table t1 --handler=part --handler-arg=key=id

2013-10-12 00:14:52,824 4394 INFO Table added: public.t1

[postgres@localhostconf]$ londiste3 part_part0.ini add-table t1 --create --handler=part --handler-arg=key=id

2013-10-12 00:14:59,093 4399 INFO Creating public.t1

[postgres@localhostconf]$ londiste3 part_part1.ini add-table t1 --create --handler=part --handler-arg=key=id

2013-10-12 00:15:04,608 4404 INFO Creating public.t1

404 INFO Creating t1_pkey

404 INFO Table added: public.t1

part_root=# \d t1

Table"public.t1"

Column | Type | Modifiers

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

id | integer | not null

Indexes:

"t1_pkey"PRIMARY KEY,btree (id)

Triggers:

_londiste_replikaAFTER INSERT OR DELETE OR UPDATE ON t1 FOR EACH ROW EXECUTE PROCEDURE pgq.logutriga('replika','ev_extra3=''hash=''||partconf.get_hash_raw(id)')

_londiste_replika_truncate AFTER TRUNCATE ON t1 FOR EACH STATEMENT EXECUTE PROCEDURE pgq.sqltriga('replika')

part_part0=# \d t1

_londiste_replika_truncate AFTER TRUNCATE ON t1 FOR EACH STATEMENT EXECUTE PROCEDURE pgq.sqltriga('replika',SimSun;font-weight:bold;vertical-align:baseline;">part_part1=# \d t1

2.4.5 测试

part_part0=# select * from t1;

(1 row)

part_part1=# select * from t1;

{可以看到之前表里的初始数据已经分配给了两个leaf节点}

part_root=# insert into t1 values (3);

(2 rows)

{分配给leaf2}

part_root=# insert into t1 values (4);

{分配给leaf1}

part_root=# insert into t1 values (5);

part_root=# insert into t1 values (6);

(3 rows)

【根据上面的测试可以发现其分配规律为12211221的分配方式】

2.5、使用walmgr3配置流复制

@H_855_502@

HOSTNAME

IP	PG_VERSION	USER	PASSWORD	PORT	ROLE
db1	192.168.100.37	9.3.2 for centos6.4-x64	postgres	highgo	5432	master
db2	192.168.100.38	9.3.2 for centos6.4-x64	postgres	highgo	5432	slave

2.5.1 配置hosts

[root@master~]# cat /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

:#:1 localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.100.37 db1

192.168.100.38 db2

[root@slave~]# cat /etc/hosts

127.0.0.1 localhost.localdomain localhost localhost4.localdomain4 localhost4

# Auto-generated hostname. Please do not remove this comment.

#::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.100.38 db2

2.5.2 配置用户验证

[postgres@db1 ~]$ cd .ssh/

[postgres@db1 .ssh]$ ls

[postgres@db1 .ssh]$ ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/home/postgres/.ssh/id_rsa):

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /home/postgres/.ssh/id_rsa.

Your public key has been saved in /home/postgres/.ssh/id_rsa.pub.

The key fingerprint is:

f1:87:23:aa:01:74:b7:f7:9b:74:7b:e6:e9:d6:80:2d postgres@db1

The key's randomart image is:

+--[ RSA 2048]----+

| |

| . . . . |

| . . . . o . |

| . . S + .o |

| . o o oE o |

| . . o .. o |

| o . + .+..|

| . o .*+ |

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

原文链接：https://www.f2er.com/postgresql/195675.html