合 PG逻辑复制插件之pgl_ddl_deploy支持DDL复制

2022年1月17日

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Tags： PG 插件逻辑复制 pgl_ddl_deploy DDL复制

👉 本文共约11800个字，系统预计阅读时间或需45分钟。

简介
安装
内容
数据字典
示例：内部逻辑复制
环境配置
配置发布订阅
配置DDL同步
1.在发布端配置
2.开启DDL复制
3.添加权限
测试DDL复制
查询数据字典
总结

PG内置的逻辑复制：https://www.dbaup.com/pgzhongdeluojifuzhilogical-replication.html
PG逻辑复制插件之pglogical使用说明：https://www.dbaup.com/pgluojifuzhichajianzhipglogicalshiyongshuoming.html

简介

详情：https://github.com/lhrbest/pgl_ddl_deploy

Transparent DDL replication for Postgres 9.5+ for both pglogical and native logical replication.

PostgreSQL 社区官方版本不支持DDL的逻辑复制，仅支持DML【INSERT、UPDATE、DELETE、TRUNCATE】，且要求表有主键，否则UPDATE和DELETE无法复制【注意：逻辑复制要求wal_level为logical】。
目前有第三方的插件可以做到DDL复制，BDR【收费】、pglogical【开源，比较复杂】、pgl_ddl_deploy。

pgl_ddl_deploy该插件可以实现PG逻辑复制中的DDL复制。该插件具有以下特点：

任何DDL SQL语句都可以直接传播给订阅者
表可以在创建时自动添加到复制中
支持过滤。可以选择性仅复制某些schema
可以选择以锁定安全的方式在订阅服务器上进行部署
ALTER TABLE语句可以由子命令标签过滤
当前最新版本是2.10版，从2.0版本开始，它支持使用本机逻辑复制进行DDL复制(以前依赖于pglogical插件)。详细信息请查阅：https://github.com/enova/pgl_ddl_deploy
在配置ddl复制的过程中，需要复制queue表，该表记录了一个函数，用来执行ddl语句。

安装

-- CentOS
git clone https://github.com/enova/pgl_ddl_deploy.git

wget https://github.com/enova/pgl_ddl_deploy/archive/refs/tags/v2.1.0.tar.gz
tar -zxvf v2.1.0.tar.gz
cd pgl_ddl_deploy-2.1.0

export PGHOME=/usr/lib/postgresql/13
export PATH=$PGHOME/bin:$PATH

USE_PGXS=1 make
USE_PGXS=1 make install

-- debian 系统
apt-get install postgresql-13-pgl-ddl-deploy

create extension pgl_ddl_deploy;

-- CentOS

git clone https://github.com/enova/pgl_ddl_deploy.git

wget https://github.com/enova/pgl_ddl_deploy/archive/refs/tags/v2.1.0.tar.gz

tar -zxvf v2.1.0.tar.gz

cd pgl_ddl_deploy-2.1.0

export PGHOME=/usr/lib/postgresql/13

export PATH=$PGHOME/bin:$PATH

USE_PGXS=1 make

USE_PGXS=1 make install

-- debian 系统

apt-get install postgresql-13-pgl-ddl-deploy

create extension pgl_ddl_deploy;

内容

lhrdb3=# \dx+ pgl_ddl_deploy
                                                              Objects in extension "pgl_ddl_deploy"
                                                                        Object description
------------------------------------------------------------------------------------------------------------------------------------------------------------------
 event trigger auto_rep_ddl_create_1_pub1
 event trigger auto_rep_ddl_drop_1_pub1
 event trigger auto_rep_ddl_unsupp_1_pub1
 function pgl_ddl_deploy.add_ext_object(text,text)
 function pgl_ddl_deploy.add_role(oid)
 function pgl_ddl_deploy.add_table_to_replication(pgl_ddl_deploy.driver,name,regclass,boolean)
 function pgl_ddl_deploy.auto_rep_ddl_create_1_pub1()
 function pgl_ddl_deploy.auto_rep_ddl_drop_1_pub1()
 function pgl_ddl_deploy.auto_rep_ddl_unsupp_1_pub1()
 function pgl_ddl_deploy.blacklisted_tags()
 function pgl_ddl_deploy.common_exclude_alter_table_subcommands()
 function pgl_ddl_deploy.current_query()
 function pgl_ddl_deploy.deploy(integer)
 function pgl_ddl_deploy.deployment_check_count(integer,text,text,pgl_ddl_deploy.driver)
 function pgl_ddl_deploy.deployment_check(integer)
 function pgl_ddl_deploy.deployment_check(text)
 function pgl_ddl_deploy.deployment_check_wrapper(integer,text)
 function pgl_ddl_deploy.deploy(text)
 function pgl_ddl_deploy.disable(integer)
 function pgl_ddl_deploy.disable(text)
 function pgl_ddl_deploy.drop_ext_object(text,text)
 function pgl_ddl_deploy.enable(integer)
 function pgl_ddl_deploy.enable(text)
 function pgl_ddl_deploy.exclude_regex()
 function pgl_ddl_deploy.execute_queued_ddl()
 function pgl_ddl_deploy.fail_queued_attempt(integer,text)
 function pgl_ddl_deploy.get_altertable_subcmdtypes(pg_ddl_command)
 function pgl_ddl_deploy.get_command_tag(pg_ddl_command)
 function pgl_ddl_deploy.get_command_type(pg_ddl_command)
 function pgl_ddl_deploy.is_subscriber(pgl_ddl_deploy.driver,text[],name)
 function pgl_ddl_deploy.kill_blockers(pgl_ddl_deploy.signals,name,name)
 function pgl_ddl_deploy.lock_safe_executor(text)
 function pgl_ddl_deploy.log_unhandled(integer,text,integer,text,text,text,bigint)
 function pgl_ddl_deploy.notify_subscription_refresh(name,boolean)
 function pgl_ddl_deploy.override()
 function pgl_ddl_deploy.provider_node_name(pgl_ddl_deploy.driver)
 function pgl_ddl_deploy.queue_ddl_message_type()
 function pgl_ddl_deploy.raise_message(text,text)
 function pgl_ddl_deploy.replicate_ddl_command(text,text[])
 function pgl_ddl_deploy.rep_set_table_wrapper()
 function pgl_ddl_deploy.rep_set_wrapper()
 function pgl_ddl_deploy.resolve_exception(integer,text)
 function pgl_ddl_deploy.resolve_unhandled(integer,text)
 function pgl_ddl_deploy.retry_all_subscriber_logs()
 function pgl_ddl_deploy.retry_subscriber_log(integer)
 function pgl_ddl_deploy.schema_execute(integer,text)
 function pgl_ddl_deploy.schema_execute(text,text)
 function pgl_ddl_deploy.set_origin_subscriber_log_id()
 function pgl_ddl_deploy.set_tag_defaults()
 function pgl_ddl_deploy.sql_command_tags(text)
 function pgl_ddl_deploy.standard_create_tags()
 function pgl_ddl_deploy.standard_drop_tags()
 function pgl_ddl_deploy.standard_repset_only_tags()
 function pgl_ddl_deploy.subscriber_command(name,text[],name,name,text,text,integer,integer,boolean,pgl_ddl_deploy.signals,integer,pgl_ddl_deploy.driver,boolean)
 function pgl_ddl_deploy.toggle_ext_object(text,text,text)
 function pgl_ddl_deploy.undeploy(integer)
 function pgl_ddl_deploy.undeploy(text)
 function pgl_ddl_deploy.unique_tags()
 function pgl_ddl_deploy.unsupported_tags()
 sequence pgl_ddl_deploy.commands_id_seq
 sequence pgl_ddl_deploy.events_id_seq
 sequence pgl_ddl_deploy.exceptions_id_seq
 sequence pgl_ddl_deploy.killed_blockers_id_seq
 sequence pgl_ddl_deploy.set_configs_id_seq
 sequence pgl_ddl_deploy.subscriber_logs_id_seq
 sequence pgl_ddl_deploy.unhandled_id_seq
 table pgl_ddl_deploy.commands
 table pgl_ddl_deploy.events
 table pgl_ddl_deploy.exceptions
 table pgl_ddl_deploy.killed_blockers
 table pgl_ddl_deploy.queue
 table pgl_ddl_deploy.set_configs
 table pgl_ddl_deploy.subscriber_logs
 table pgl_ddl_deploy.unhandled
 type pgl_ddl_deploy.driver
 type pgl_ddl_deploy.signals
 view pgl_ddl_deploy.event_trigger_schema
(77 rows)

lhrdb3=# \dx+ pgl_ddl_deploy

Objects in extension "pgl_ddl_deploy"

Object description

------------------------------------------------------------------------------------------------------------------------------------------------------------------

event trigger auto_rep_ddl_create_1_pub1

event trigger auto_rep_ddl_drop_1_pub1

event trigger auto_rep_ddl_unsupp_1_pub1

function pgl_ddl_deploy.add_ext_object(text,text)

function pgl_ddl_deploy.add_role(oid)

function pgl_ddl_deploy.add_table_to_replication(pgl_ddl_deploy.driver,name,regclass,boolean)

function pgl_ddl_deploy.auto_rep_ddl_create_1_pub1()

function pgl_ddl_deploy.auto_rep_ddl_drop_1_pub1()

function pgl_ddl_deploy.auto_rep_ddl_unsupp_1_pub1()

function pgl_ddl_deploy.blacklisted_tags()

function pgl_ddl_deploy.common_exclude_alter_table_subcommands()

function pgl_ddl_deploy.current_query()

function pgl_ddl_deploy.deploy(integer)

function pgl_ddl_deploy.deployment_check_count(integer,text,text,pgl_ddl_deploy.driver)

function pgl_ddl_deploy.deployment_check(integer)

function pgl_ddl_deploy.deployment_check(text)

function pgl_ddl_deploy.deployment_check_wrapper(integer,text)

function pgl_ddl_deploy.deploy(text)

function pgl_ddl_deploy.disable(integer)

function pgl_ddl_deploy.disable(text)

function pgl_ddl_deploy.drop_ext_object(text,text)

function pgl_ddl_deploy.enable(integer)

function pgl_ddl_deploy.enable(text)

function pgl_ddl_deploy.exclude_regex()

function pgl_ddl_deploy.execute_queued_ddl()

function pgl_ddl_deploy.fail_queued_attempt(integer,text)

function pgl_ddl_deploy.get_altertable_subcmdtypes(pg_ddl_command)

function pgl_ddl_deploy.get_command_tag(pg_ddl_command)

function pgl_ddl_deploy.get_command_type(pg_ddl_command)

function pgl_ddl_deploy.is_subscriber(pgl_ddl_deploy.driver,text[],name)

function pgl_ddl_deploy.kill_blockers(pgl_ddl_deploy.signals,name,name)

function pgl_ddl_deploy.lock_safe_executor(text)

function pgl_ddl_deploy.log_unhandled(integer,text,integer,text,text,text,bigint)

function pgl_ddl_deploy.notify_subscription_refresh(name,boolean)

function pgl_ddl_deploy.override()

function pgl_ddl_deploy.provider_node_name(pgl_ddl_deploy.driver)

function pgl_ddl_deploy.queue_ddl_message_type()

function pgl_ddl_deploy.raise_message(text,text)

function pgl_ddl_deploy.replicate_ddl_command(text,text[])

function pgl_ddl_deploy.rep_set_table_wrapper()

function pgl_ddl_deploy.rep_set_wrapper()

function pgl_ddl_deploy.resolve_exception(integer,text)

function pgl_ddl_deploy.resolve_unhandled(integer,text)

function pgl_ddl_deploy.retry_all_subscriber_logs()

function pgl_ddl_deploy.retry_subscriber_log(integer)

function pgl_ddl_deploy.schema_execute(integer,text)

function pgl_ddl_deploy.schema_execute(text,text)

function pgl_ddl_deploy.set_origin_subscriber_log_id()

function pgl_ddl_deploy.set_tag_defaults()

function pgl_ddl_deploy.sql_command_tags(text)

function pgl_ddl_deploy.standard_create_tags()

function pgl_ddl_deploy.standard_drop_tags()

function pgl_ddl_deploy.standard_repset_only_tags()

function pgl_ddl_deploy.subscriber_command(name,text[],name,name,text,text,integer,integer,boolean,pgl_ddl_deploy.signals,integer,pgl_ddl_deploy.driver,boolean)

function pgl_ddl_deploy.toggle_ext_object(text,text,text)

function pgl_ddl_deploy.undeploy(integer)

function pgl_ddl_deploy.undeploy(text)

function pgl_ddl_deploy.unique_tags()

function pgl_ddl_deploy.unsupported_tags()

sequence pgl_ddl_deploy.commands_id_seq

sequence pgl_ddl_deploy.events_id_seq

sequence pgl_ddl_deploy.exceptions_id_seq

sequence pgl_ddl_deploy.killed_blockers_id_seq

sequence pgl_ddl_deploy.set_configs_id_seq

sequence pgl_ddl_deploy.subscriber_logs_id_seq

sequence pgl_ddl_deploy.unhandled_id_seq

table pgl_ddl_deploy.commands

table pgl_ddl_deploy.events

table pgl_ddl_deploy.exceptions

table pgl_ddl_deploy.killed_blockers

table pgl_ddl_deploy.queue

table pgl_ddl_deploy.set_configs

table pgl_ddl_deploy.subscriber_logs

table pgl_ddl_deploy.unhandled

type pgl_ddl_deploy.driver

type pgl_ddl_deploy.signals

view pgl_ddl_deploy.event_trigger_schema

(77 rows)

数据字典

select * from pgl_ddl_deploy.commands;
select * from pgl_ddl_deploy.events;
select * from pgl_ddl_deploy.exceptions;
select * from pgl_ddl_deploy.killed_blockers;
select * from pgl_ddl_deploy.queue;
select * from pgl_ddl_deploy.set_configs;
select * from pgl_ddl_deploy.subscriber_logs;
select * from pgl_ddl_deploy.unhandled;

select * from pgl_ddl_deploy.commands;

select * from pgl_ddl_deploy.events;

select * from pgl_ddl_deploy.exceptions;

select * from pgl_ddl_deploy.killed_blockers;

select * from pgl_ddl_deploy.queue;

select * from pgl_ddl_deploy.set_configs;

select * from pgl_ddl_deploy.subscriber_logs;

select * from pgl_ddl_deploy.unhandled;

示例：内部逻辑复制

环境配置

2个节点都需要配置：

create database lhrdb3;
\c lhrdb3

create table t1(id int primary key, name text, reg_time timestamp);
insert into t1 select generate_series(1,10000),'xxt',now();
select count(*) from t1;

create extension pgl_ddl_deploy;

create database lhrdb3;

\c lhrdb3

create table t1(id int primary key, name text, reg_time timestamp);

insert into t1 select generate_series(1,10000),'xxt',now();

select count(*) from t1;

create extension pgl_ddl_deploy;

配置发布订阅

-- 发布端
CREATE PUBLICATION pub1 FOR ALL TABLES;
select * from pg_publication;

-- 订阅端
create subscription sub1 connection 
'host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr' publication pub1;

select * from pg_subscription;

-- 2.  订阅节点创建同步表并手动执行刷新命令
create table t1(id int primary key, name text, reg_time timestamp);
ALTER SUBSCRIPTION sub1 REFRESH PUBLICATION ;

-- 发布端查询复制槽
select * from pg_replication_slots;

-- 发布端

CREATE PUBLICATION pub1 FOR ALL TABLES;

select * from pg_publication;

-- 订阅端

create subscription sub1 connection

'host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr' publication pub1;

select * from pg_subscription;

-- 2. 订阅节点创建同步表并手动执行刷新命令

create table t1(id int primary key, name text, reg_time timestamp);

ALTER SUBSCRIPTION sub1 REFRESH PUBLICATION ;

-- 发布端查询复制槽

select * from pg_replication_slots;

过程：

lhrdb3=# CREATE PUBLICATION pub1 FOR all TABLES;
CREATE PUBLICATION
lhrdb3=# select * from pg_publication;
  oid  | pubname | pubowner | puballtables | pubinsert | pubupdate | pubdelete | pubtruncate | pubviaroot
-------+---------+----------+--------------+-----------+-----------+-----------+-------------+------------
 17202 | pub1    |       10 | t            | t         | t         | t         | t           | f
(1 row)

lhrdb3=# create subscription sub1 connection
lhrdb3-# 'host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr' publication pub1;
NOTICE:  created replication slot "sub1" on publisher
CREATE SUBSCRIPTION
lhrdb3=# select * from pg_subscription;
  oid  | subdbid | subname | subowner | subenabled |                             subconninfo                             | subslotname | subsynccommit | subpublications
-------+---------+---------+----------+------------+---------------------------------------------------------------------+-------------+---------------+-----------------
 17308 |   16792 | sub1    |       10 | t          | host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr | sub1        | off           | {pub1}
(1 row)

lhrdb3=#  select count(*) from t1;
 count
-------
 10000
(1 row)

lhrdb3=# select * from pg_replication_slots;
             slot_name             |      plugin      | slot_type | datoid | database | temporary | active | active_pid | xmin | catalog_xmin | restart_lsn | confirmed_flush_lsn | wal_status | safe_wal_size
-----------------------------------+------------------+-----------+--------+----------+-----------+--------+------------+------+--------------+-------------+---------------------+------------+---------------
sub1                               | pgoutput         | logical   |  16939 | lhrdb3   | f         | t      |      19678 |      |          537 | 0/25CD268   | 0/25CD2A0           | reserved   |

lhrdb3=# CREATE PUBLICATION pub1 FOR all TABLES;

CREATE PUBLICATION

lhrdb3=# select * from pg_publication;

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

17202 | pub1 | 10 | t | t | t | t | t | f

(1 row)

lhrdb3=# create subscription sub1 connection

lhrdb3-# 'host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr' publication pub1;

NOTICE: created replication slot "sub1" on publisher

CREATE SUBSCRIPTION

lhrdb3=# select * from pg_subscription;

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

17308 | 16792 | sub1 | 10 | t | host=172.72.6.30 port=5432 dbname=lhrdb3 user=postgres password=lhr | sub1 | off | {pub1}

(1 row)

lhrdb3=# select count(*) from t1;

count

-------

10000

(1 row)

lhrdb3=# select * from pg_replication_slots;

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

sub1 | pgoutput | logical | 16939 | lhrdb3 | f | t | 19678 | | 537 | 0/25CD268 | 0/25CD2A0 | reserved |

数据已经同步！！！

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合 PG逻辑复制插件之pgl_ddl_deploy支持DDL复制

简介

安装

内容

数据字典

示例：内部逻辑复制

环境配置

配置发布订阅

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合 PG逻辑复制插件之pgl_ddl_deploy支持DDL复制

简介

安装

内容

数据字典

示例：内部逻辑复制

环境配置

配置发布订阅

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