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前言

本文详细阐述了利用OGG实现PostgreSQL实时同步的全过程。

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📣 1.环境部署

✨ 1.1 架构规划

✨ 1.2 网络规划

主机名	IP	操作系统	内存/空间	角色	说明
postgresql01	172.18.12.50	centos7.8	2c/18G 400G	源端	postgresql 14版本
postgresql02	172.18.12.51	centos7.8	2c/18G 400G	目标库	postgresql 14版本
Ogg21c	172.18.12.52	centos7.8	2c/18G 400G	OGG	OGG for postgrSQL

📣 2.OGG for postgrSQL 安装

✨ 2.1 解压安装

安装
mkdir /ogg
unzip /opt/213000_ggs_Linux_x64_PostgreSQL_64bit.zip

[root@oggforpg /]# unzip /opt/213000_ggs_Linux_x64_PostgreSQL_64bit.zip
Archive: /opt/213000_ggs_Linux_x64_PostgreSQL_64bit.zip
inflating: ggs_Linux_x64_PostgreSQL_64bit.tar
inflating: OGG-21.3.0.0-README.txt
inflating: oracle-goldengate-release-notes_21.3.pdf
[root@oggforpg /]# tar -xvf ggs_Linux_x64_PostgreSQL_64bit.tar -C /ogg/

✨ 2.2 安装lib

yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
yum install -y postgresql14-libs*
Installed:
postgresql14-libs.x86_64 0:14.10-1PGDG.rhel7

✨ 2.3 环境变量

cat >> /root/.bashrc <<"EOF"
export OGG_HOME=/ogg
export LD_LIBRARY_PATH=/ogg/lib:/usr/pgsql-14/lib/:/usr/lib64:/usr/lib:$LD_LIBRARY_PATH
export ODBCINI=/ogg/odbc.ini
export PATH=$PATH:$OGG_HOME
#alias ogg='rlwrap ggsci'
alias ggsci='cd $OGG_HOME;ggsci'
EOF

source /root/.bashrc

✨ 2.4 OGG初始化

[root@oggforpg ~]# ogg

Oracle GoldenGate Command Interpreter for PostgreSQL
Version 21.3.0.0.0 OGGCORE_21.3.0.0.0_PLATFORMS_210728.1047
Oracle Linux 7, x64, 64bit (optimized), PostgreSQL  on Aug  4 2021 20:27:55
Operating system character set identified as US-ASCII.

Copyright (C) 1995, 2021, Oracle and/or its affiliates. All rights reserved.



GGSCI (oggforpg) 1> create subdirs

Creating subdirectories under current directory /root

Parameter file                 /ogg/dirprm: created.
Report file                    /ogg/dirrpt: created.
Checkpoint file                /ogg/dirchk: created.
Process status files           /ogg/dirpcs: created.
SQL script files               /ogg/dirsql: created.
Database definitions files     /ogg/dirdef: created.
Extract data files             /ogg/dirdat: created.
Temporary files                /ogg/dirtmp: created.
Credential store files         /ogg/dircrd: created.
Master encryption key wallet files /ogg/dirwlt: created.
Dump files                     /ogg/dirdmp: created.

-- mgr
cat > /ogg/dirprm/mgr.prm <<"EOF"
port 7809
dynamicportlist 2032-2040
purgeoldextracts ./dirdat/*, usecheckpoints,minkeephours 24
AUTORESTART ER *, RETRIES 3, WAITMINUTES 2,RESETMINUTES 10
EOF

✨ 2.5 ODBC驱动

cat > /ogg/odbc.ini <<"EOF"
[ODBC Data Sources]
postgre=DataDirect 14 PostgreSQL Wire Protocol
 
[ODBC]
IANAAppCodePage=106  ##106代表的是UTF-8
InstallDir=/ogg
 
[PGDSN1]
Driver=/ogg/lib/GGpsql25.so
#Driver=/usr/lib64/psqlodbcw.so
Description=DataDirect 14 PostgreSQL Wire Protocol
Database=jemdb
HostName=172.18.12.50
PortNumber=5432
LogonID=ogguser
Password=123456
TransactionErrorBehavior=2
 
[PGDSN2]
Driver=/ogg/lib/GGpsql25.so
#Driver=/usr/lib64/psqlodbcw.so
Description=DataDirect 14 PostgreSQL Wire Protocol
Database=jemdb
HostName=172.18.12.51
PortNumber=5432
LogonID=ogguser
Password=123456
TransactionErrorBehavior=2
EOF


##登录测试,密码123456
psql -U postgres -h 172.18.12.50 -p 5432
psql -U postgres -h 172.18.12.51 -p 5432

📣 3.主从同步

✨ 3.1 配置extract

cat > /ogg/dirprm/ext1.prm <<“EOF”
extract ext1
SETENV(PGCLIENTENCODING = “UTF8” )
SETENV(ODBCINI=“/ogg/odbc.ini” )
SOURCEDB PGDSN1, userid ogguser, password 123456
exttrail ./dirdat/e1
IGNOREREPLICATES
TRANLOGOPTIONS FILTERTABLE ogg.ckpt
table public.*;
EOF

DBLOGIN SOURCEDB PGDSN1 USERID ogguser PASSWORD 123456
REGISTER EXTRACT ext1
ADD TRANDATA public.*
add checkpointtable ogg.ckpt
ADD TRANDATA ogg.ckpt

add ext ext1, tranlog, begin now
add exttrail ./dirdat/e1, ext ext1

✨ 3.2.配置replication

cat > /ogg/dirprm/rep1.prm <<“EOF”
replicat rep1
SETENV(PGCLIENTENCODING = “UTF8” )
SETENV(ODBCINI=“/ogg/odbc.ini” )
SETENV(NLS_LANG=“AMERICAN_AMERICA.AL32UTF8”)
TARGETDB PGDSN2, userid ogguser, password 123456
map public., target public.;
EOF

DBLOGIN SOURCEDB PGDSN2 USERID ogguser PASSWORD 123456
add checkpointtable ogg.ckpt

add rep rep1, exttrail ./dirdat/e1, checkpointtable ogg.ckpt

✨ 3.3 进程启动

start EXT!
start REP1
GGSCI (oggforpg as ogguser@PGDSN2) 4> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
EXTRACT RUNNING EXT1 00:00:00 00:00:07
REPLICAT RUNNING REP1 00:00:00 00:00:02