postgresql中PLProxy如何配置

小編給大家分享一下postgresql中PLProxy如何配置，希望大家閱讀完這篇文章之后都有所收獲，下面讓我們一起去探討吧！

1.下載plproxy-2.6.tar.gz

網址：https://plproxy.github.io/

root用戶上傳到 /home/soft目錄

# cd /home/

# chown postgres.postgres soft

# cd soft

# chown postgres.postgres plproxy-2.6.tar.gz

2.編譯安裝

前提：postgresql 9.5.2源碼安裝，/opt/pgsql/9.5.2

postgres用戶PATH環境變量

[postgres@pgtest ~]$ more .bash_profile 

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

        . ~/.bashrc

fi

# User specific environment and startup programs

export LD_LIBRARY_PATH=/usr/local/mysql/lib/mysql:/opt/pgsql/9.5.2/lib

export PATH=/usr/local/mysql/bin:/opt/pgbouncer/1.7.2/bin:/opt/pgsql/9.5.2/bin:$PATH

export MANPATH=/opt/pgsql/9.5.2/share/man:$MANPATH

[postgres@pgtest ~]$

postgres用戶執行以下命令

$ tar zxvf plproxy-2.6.tar.gz

$ make

......

......

......

gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -O2 -fpic -I/opt/pgsql/9.5.2/include/server -I/opt/pgsql/9.5.2/include -DNO_SELECT=0 -I. -I./ -I/opt/pgsql/9.5.2/include/server -I/opt/pgsql/9.5.2/include/internal -D_GNU_SOURCE   -c -o src/aatree.o src/aatree.c

gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -O2 -fpic -shared -o plproxy.so src/scanner.o src/parser.tab.o src/cluster.o src/execute.o src/function.o src/main.o src/query.o src/result.o src/type.o src/poll_compat.o src/aatree.o -L/opt/pgsql/9.5.2/lib -Wl,--as-needed -Wl,-rpath,'/opt/pgsql/9.5.2/lib',--enable-new-dtags  -L/opt/pgsql/9.5.2/lib -lpq 

echo "create extension plproxy;" > sql/plproxy.sql 

cat sql/plproxy_lang.sql sql/plproxy_fdw.sql > sql/plproxy--2.6.0.sql

cat sql/ext_update_validator.sql >sql/plproxy--2.3.0--2.6.0.sql

cat sql/ext_update_validator.sql >sql/plproxy--2.4.0--2.6.0.sql

cat sql/ext_update_validator.sql >sql/plproxy--2.5.0--2.6.0.sql

cat sql/ext_unpackaged.sql > sql/plproxy--unpackaged--2.6.0.sql

$

$ make install

/bin/mkdir -p '/opt/pgsql/9.5.2/lib'

/bin/mkdir -p '/opt/pgsql/9.5.2/share/extension'

/bin/mkdir -p '/opt/pgsql/9.5.2/share/extension'

/usr/bin/install -c -m 755  plproxy.so '/opt/pgsql/9.5.2/lib/plproxy.so'

/usr/bin/install -c -m 644 .//plproxy.control '/opt/pgsql/9.5.2/share/extension/'

/usr/bin/install -c -m 644  sql/plproxy--2.6.0.sql sql/plproxy--2.3.0--2.6.0.sql sql/plproxy--2.4.0--2.6.0.sql sql/plproxy--2.5.0--2.6.0.sql sql/plproxy--unpackaged--2.6.0.sql '/opt/pgsql/9.5.2/share/extension/'

$ 

3.proxy

proxy節點：

ipaddress:192.168.199.201

user: proxy

password: proxy

database：proxy

data節點

ipaddress:192.168.199.201

user: datauser

password: datauser

database：db0、db1、db2、db3

[postgres@pgtest ~]$ psql

psql (9.5.2)

Type "help" for help.

postgres=# \l

                                  List of databases

   Name    |  Owner   | Encoding |   Collate   |    Ctype    |   Access privileges   

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

 postgres  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 

 template0 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +

           |          |          |             |             | postgres=CTc/postgres

 template1 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +

           |          |          |             |             | postgres=CTc/postgres

(3 rows)

創建role

postgres=# create role proxy nosuperuser login encrypted password 'proxy';

CREATE ROLE

創建proxy數據庫

postgres=# create database proxy;

CREATE DATABASE

postgres=# \c proxy

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

加載擴展proxy

proxy=# create extension plproxy;

CREATE EXTENSION

proxy=# 

調整proxy庫權限

proxy=# grant all on database proxy to proxy;

GRANT

proxy=# \c proxy proxy

You are now connected to database "proxy" as user "proxy".

proxy=> 

創建workschema schema, 目的是和數據節點的schema匹配, 這樣的話可以省去在代理函數中寫target強行指定schema.

數據節點也建立這個schema。

proxy=> create schema workschema;

CREATE SCHEMA

proxy=> 

創建data節點數據庫

proxy=> \c postgres postgres

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

postgres=# create role datauser nosuperuser login encrypted password 'datauser';

CREATE ROLE 

postgres=# create database db0;

CREATE DATABASE

postgres=# create database db1;

CREATE DATABASE

postgres=# create database db2;

CREATE DATABASE

postgres=# create database db3;

CREATE DATABASE

postgres=# 

調整權限, 賦予給后面將要給user mapping中配置的option user權限.

postgres=# grant all on database db0 to datauser;

GRANT

postgres=# grant all on database db1 to datauser;

GRANT

postgres=# grant all on database db2 to datauser;

GRANT

postgres=# grant all on database db3 to datauser;

GRANT

postgres=# 

每個庫創建schema

postgres=# \c db0 datauser

You are now connected to database "db0" as user "datauser".

db0=> create schema workschema;

CREATE SCHEMA

db0=> \c db1 datauser

You are now connected to database "db1" as user "datauser".

db1=> create schema workschema;

CREATE SCHEMA

db1=> \c db2 datauser

You are now connected to database "db2" as user "datauser".

db2=> create schema workschema;

CREATE SCHEMA

db2=> \c db3 datauser

You are now connected to database "db3" as user "datauser".

db3=> create schema workschema;

CREATE SCHEMA

db3=>

使用超級用戶在proxy數據庫中創建server.

postgres=# \c proxy postgres

proxy=#CREATE SERVER cluster_srv1 FOREIGN DATA WRAPPER plproxy options (connection_lifetime '1800',

p0 'dbname=db0 hostaddr=192.168.199.201 port=1921 application_name=test',

p1 'dbname=db1 hostaddr=192.168.199.201 port=1921',

p2 'dbname=db2 hostaddr=192.168.199.201 port=1921',

p3 'dbname=db3 hostaddr=192.168.199.201 port=1921');

CREATE SERVER

proxy=# 

創建server時可以使用libpq中的選項. 例如本例使用了application_name.

將server權限賦予給proxy用戶.

proxy=# GRANT usage ON FOREIGN SERVER cluster_srv1 to proxy;

GRANT

proxy=#

配置proxy用戶的連接cluster_srv1的選項.

proxy=# GRANT usage ON FOREIGN SERVER cluster_srv1 to proxy;

GRANT

proxy=# CREATE USER MAPPING FOR PROXY SERVER cluster_srv1 options(user 'datauser');

CREATE USER MAPPING

proxy=# 

用戶proxy連接到cluster_srv1時使用datauser用戶連接, 這里不需要配置password, 因為我們將使用trust認證.

修改數據節點的pg_hba.conf

從proxy節點使用datauser用戶連接數據庫db0, db1, db2,db3使用trust認證.

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only

local   all             all                                     trust

# IPv4 local connections:

host    all             all             127.0.0.1/32            trust

host    db0             datauser        192.168.199.0/24        trust  

host    db1             datauser        192.168.199.0/24        trust

host    db2             datauser        192.168.199.0/24        trust

host    db3             datauser        192.168.199.0/24        trust

$ pg_ctl reload -D /pgdata95/

server signaled

$ 

在plproxy節點創建代理函數

使用超級用戶創建plproxy函數, 然后把函數權限賦予給proxy權限.

postgres=# \c proxy

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

proxy=# CREATE OR REPLACE FUNCTION workschema.dy(sql text)

proxy-# RETURNS SETOF record AS 

proxy-# $BODY$

proxy$#    cluster 'cluster_srv1';

proxy$#    run on all;

proxy$# $BODY$

proxy-# LANGUAGE 'plproxy';

CREATE FUNCTION 

proxy=# grant execute on function workschema.dy(text) to proxy;

GRANT

proxy=# 

在數據節點創建實體函數

db0\db1\db2\db3 數據庫 datauser用戶

CREATE OR REPLACE FUNCTION workschema.dy(sql text)

RETURNS SETOF record 

AS $BODY$

       declare rec record;

       begin

            for rec in execute sql loop

                return next rec;

            end loop;

            return;

       end;

   $BODY$

LANGUAGE 'plpgsql';

在proxy節點中就可以訪問數據節點了。

# \c proxy proxy

proxy=> select * from workschema.dy('select count(*) from pg_class') as t(i int8);

  i  

-----

 311

 311

 311

 311

(4 rows)

proxy=> select sum(i) from workschema.dy('select count(*) from pg_class') as t(i int8);

 sum  

------

 1244

(1 row)

proxy=> 

plproxy節點測試

在數據節點創建測試表.

db0\db1\db2\db3 數據庫 datauser用戶 

創建表

create table t(id int);

創建實體函數

CREATE OR REPLACE FUNCTION workschema.f_test4()

RETURNS int

AS $$

    declare 

    begin

    insert into t(id) values(1);

    return 0;

    end;

   $$

LANGUAGE 'plpgsql';

proxy 創建代理函數

在proxy節點創建代理函數, 并且將執行權限賦予給proxy用戶.

proxy=> \c proxy postgres

CREATE OR REPLACE FUNCTION workschema.f_test4() 

RETURNS int 

AS $$

cluster 'cluster_srv1';

run on 0;

$$ 

LANGUAGE 'plproxy' strict;

proxy=# grant execute on function workschema.f_test4() to proxy;

GRANT

執行代理函數

proxy=# \c proxy proxy

You are now connected to database "proxy" as user "proxy".

proxy=> 

proxy=> 

proxy=> 

proxy=> select * from workschema.f_test4();

 f_test4 

---------

       0

(1 row)

proxy=> 

看完了這篇文章，相信你對“postgresql中PLProxy如何配置”有了一定的了解，如果想了解更多相關知識，歡迎關注億速云行業資訊頻道，感謝各位的閱讀！