使用OGG 微服务搭建PostgreSQL双主实时同步架构

小麦苗DBA宝典

发布于 2022-11-07 19:14:20

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发布于 2022-11-07 19:14:20

文章被收录于专栏：小麦苗的DB宝专栏小麦苗的DB宝专栏

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OGG有传统的经典架构，也有最新的微服务，2个都可以远程捕获和应用数据，对数据库服务器是0侵入，而传统的经典架构是纯命令行模式，最新的微服务架构是图形化界面操作，几乎所有操作都可以在界面进行。相关文章可以参考：

使用OGG for MySQL微服务快速双向同步RDS数据库：https://www.xmmup.com/shiyongoggweifuwukuaisushuangxiangtongburdsshujuku.html
OGG用于跨云RDS for MySQL之间配置双主实时同步–OGG远程捕获和投递：https://www.xmmup.com/oggyongyukuayunrdszhijianpeizhishuangzhushishitongbuyuanchengbuhuohetoudi.html
otter用于跨云RDS for mysql之间配置双主实时同步：https://www.xmmup.com/otteryongyukuayunrdszhijianpeizhishuangzhushishitongbu.html
OGG用于PG数据库之间双主实时同步（RDS for PG亦可）–OGG远程捕获和投递：https://www.xmmup.com/oggyongyupgshujukuzhijianshuangzhushishitongburds-for-pgyikeoggyuanchengbuhuohetoudi.html

使用OGG for PG微服务

-- 创建专用网络
docker network create --subnet=172.72.6.0/24 pg-network


-- OGG微服务
docker pull lhrbest/ogg213mapg:v1.0

docker rm -f lhrogg213mapg
docker run -d --name lhrogg213mapg -h lhrogg213mapg \
  --net=pg-network --ip 172.72.6.25 \
  -p 9390:3389 -p 19000-19005:9000-9005 \
  -v /sys/fs/cgroup:/sys/fs/cgroup \
  --privileged=true lhrbest/ogg213mapg:v1.0 \
  /usr/sbin/init



-- PG A
docker rm -f lhrpga
docker run -d --name lhrpga -h lhrpga \
   -p 64320:5432 --net=pg-network --ip 172.72.6.20 \
   -e POSTGRES_PASSWORD=lhr \
   -e TZ=Asia/Shanghai \
   postgres:13.4


-- PG B
docker rm -f lhrpgb
docker run -d --name lhrpgb -h lhrpgb \
   -p 64321:5432 --net=pg-network --ip 172.72.6.21 \
   -e POSTGRES_PASSWORD=lhr \
   -e TZ=Asia/Shanghai \
   postgres:13.4


-- 2个PG库需要配置
psql -U postgres -h 192.168.66.35 -p 64320
psql -U postgres -h 192.168.66.35 -p 64321

alter system set wal_level='logical';
alter system set max_replication_slots = 10 ;

create database lhrdb;
\c lhrdb
create schema ogg;

docker restart lhrpga lhrpgb






-- OGGMA
cat > /ogg213c/ogg_ma/odbc.ini <<"EOF"
[ODBC Data Sources]
PGDSN1=DataDirect 13 PostgreSQL Wire Protocol
PGDSN2=DataDirect 13 PostgreSQL Wire Protocol

[ODBC]
IANAAppCodePage=106
InstallDir=/ogg213c/ogg_ma

[PGDSN1]
Driver=/ogg213c/ogg_ma/lib/GGpsql25.so
#Driver=/usr/lib64/psqlodbcw.so
Description=DataDirect 13 PostgreSQL Wire Protocol
Database=lhrdb
HostName=172.72.6.20
PortNumber=5432
LogonID=postgres
Password=lhr

[PGDSN2]
Driver=/ogg213c/ogg_ma/lib/GGpsql25.so
#Driver=/usr/lib64/psqlodbcw.so
Description=DataDirect 13 PostgreSQL Wire Protocol
Database=lhrdb
HostName=172.72.6.21
PortNumber=5432
LogonID=postgres
Password=lhr

EOF

访问：http://192.168.66.35:19000 ，用户名：oggadmin，密码：lhr

创建身份证明

或直接访问：http://192.168.66.35:19001/

创建检查点表

由于我们要配置双主，所以，这里的PG1和PG2都需要配置检查点表，否则只在目标端配置检查点表即可。

数据初始化

首先将PGA和PGB的lhrdb库的数据初始化.

-- pga建表并插入数据
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/pgsql/lib

sysbench /usr/share/sysbench/oltp_common.lua --db-driver=pgsql \
--pgsql-host=172.72.6.20 --pgsql-port=5432 \
--pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
--table-size=10000 --tables=10 --threads=80 \
--events=999999999 --time=60 prepare

-- pgb只是建表，注意：table-size
sysbench /usr/share/sysbench/oltp_common.lua --db-driver=pgsql \
--pgsql-host=172.72.6.21 --pgsql-port=5432 \
--pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
--table-size=0 --tables=10 --threads=80 \
--events=999999999 --time=60 prepare

当然，我们可以不使用OGG进行数据的初始化，也可以使用数据库本身的工具进行初始化，例如：

pg_dump -d lhrdb > lhrdb.dmp

psql -U postgres -d lhrdb -h 172.72.6.21  < lhrdb.dmp

这里演示从OGG进行数据的初始化。

添加表的TRANDATA 信息

image-20211202221059559

2个库的public下的表都需要添加。

从PGA配置初始提取

参数内容：

EXTRACT ext0
SETENV(PGCLIENTENCODING = "UTF8")
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini")
SOURCEDB PGDSN1 USERIDALIAS PG1, DOMAIN OGGMA
EXTFILE ./dirdat/e0 ,  PURGE
TABLE public.*;

数据已经导出到本地。

将数据导入到PGB

image-20211202155600306

image-20211202160022049

参数：

REPLICAT rep0
SETENV(PGCLIENTENCODING = "UTF8" )
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini")
TARGETDB PGDSN2 USERIDALIAS PG2, DOMAIN OGGMA
MAP public.*, TARGET public.*;

image-20211202160303356

可以看到，数据都已经抽取到目标端了。

配置复制槽

在配置PostgreSQL实时同步之前，需要先配置复制槽。

C:\Users\lhrxxt>adminclient
Oracle GoldenGate Administration Client for Oracle
Version 21.3.0.0.1 OGGCORE_21.3.0.0.1_PLATFORMS_211007.1817

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

Windows x64 (optimized) on Oct  7 2021 21:05:36
Operating system character set identified as GBK.

OGG (not connected) 1> CONNECT http://192.168.66.35:19001 deployment deploy213 as oggadmin password lhr

OGG (http://192.168.66.35:19001 deploy213) 2> dblogin useridalias PG1 DOMAIN OGGMA
Successfully logged into database.

OGG (http://192.168.66.35:19001 deploy213 as PG1@lhrdb) 3> REGISTER EXTRACT  ext1
2021-12-02T14:22:17Z  INFO    OGG-25355  Successfully created replication slot 'ext1_eaa1c3d574a94c47' for Extract group 'EXT1' in database 'lhrdb'.

OGG (http://192.168.66.35:19001 deploy213 as PG1@lhrdb) 4> dblogin useridalias PG2 DOMAIN OGGMA
Successfully logged into database.

OGG (http://192.168.66.35:19001 deploy213 as PG2@lhrdb) 6> REGISTER EXTRACT  ext2
2021-12-02T14:23:36Z  INFO    OGG-25355  Successfully created replication slot 'ext2_5521571981698d81' for Extract group 'EXT2' in database 'lhrdb'.

OGG (http://192.168.66.35:19001 deploy213 as PG2@lhrdb) 7> info all
Program     Status      Group       Type             Lag at Chkpt  Time Since Chkpt

REPLICAT    RUNNING     REP0        NONINTEGRATED    00:00:00      00:00:06

OGG (http://192.168.66.35:19001 deploy213 as PG2@lhrdb) 8> CONNECT http://192.168.66.35:19000 deployment deploy213 as oggadmin password lhr

OGG (http://192.168.66.35:19000 deploy213) 9> info all
Program     Status      Group       Type             Lag at Chkpt  Time Since Chkpt

ADMINSRVR   RUNNING
DISTSRVR    RUNNING
PMSRVR      RUNNING
RECVSRVR    RUNNING

若不配置复制槽，会报错：OGG-25374 Oracle GoldenGate Capture for PostgreSQL, EXT1.prm: The replication slot 'ext1_eaa1c3d574a94c47' for group 'EXT1' does not exist in the database 'lhrdb'.

配置PGA到PGB的实时同步

创建extract进程

若是报错：OGG-15409 Alias 'PG1' not found in credential store domain 'OracleGoldenGate'.

可以忽略，或者参考创建身份证明，在域OracleGoldenGate中创建PG1和PG2。

参数：

extract ext1
SETENV(PGCLIENTENCODING = "UTF8" )
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini" )
SOURCEDB PGDSN1 USERIDALIAS PG1, DOMAIN OGGMA
exttrail ./dirdat/e1
IGNOREREPLICATES
TRANLOGOPTIONS FILTERTABLE ogg.ckpt
table public.*;

创建replicate进程

参数：

replicat rep1
SETENV(PGCLIENTENCODING = "UTF8" )
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini" )
SETENV(NLS_LANG="AMERICAN_AMERICA.AL32UTF8")
TARGETDB PGDSN2 USERIDALIAS PG2, DOMAIN OGGMA
map public.*, target public.*;

配置B到A的实时同步

创建extract进程

参数：

extract ext2
SETENV(PGCLIENTENCODING = "UTF8" )
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini" )
SOURCEDB PGDSN2 USERIDALIAS PG2, DOMAIN OGGMA
exttrail ./dirdat/e2
IGNOREREPLICATES
TRANLOGOPTIONS FILTERTABLE ogg.ckpt
table public.*;

创建replicate进程

参数：

replicat rep2
SETENV(PGCLIENTENCODING = "UTF8")
SETENV(ODBCINI="/ogg213c/ogg_ma/odbc.ini")
SETENV(NLS_LANG="AMERICAN_AMERICA.AL32UTF8")
TARGETDB PGDSN1 USERIDALIAS PG1, DOMAIN OGGMA
map public.*, target public.*;

配置完成后的效果

压测同步并查看检测数据

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/pgsql/lib

-- 在PGA压测
sysbench /usr/share/sysbench/oltp_read_write.lua --db-driver=pgsql \
--pgsql-host=172.72.6.20 --pgsql-port=5432 \
--pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
--table-size=1000 --tables=10 --threads=20 \
--events=999999999 --time=60 --report-interval=10 \
--db-ps-mode=disable --forced-shutdown=1 run



-- 在PGB压测
sysbench /usr/share/sysbench/oltp_read_write.lua --db-driver=pgsql \
--pgsql-host=172.72.6.21 --pgsql-port=5432 \
--pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
--table-size=1000 --tables=10 --threads=20 \
--events=999999999 --time=60 --report-interval=10 \
--db-ps-mode=disable --forced-shutdown=1 run

在PGA侧加压

[root@docker35 ~]# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/pgsql/lib
[root@docker35 ~]# sysbench /usr/share/sysbench/oltp_read_write.lua --db-driver=pgsql \
> --pgsql-host=172.72.6.20 --pgsql-port=5432 \
> --pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
> --table-size=1000 --tables=10 --threads=20 \
> --events=999999999 --time=60 --report-interval=10 \
> --db-ps-mode=disable --forced-shutdown=1 run
sysbench 1.0.20 (using bundled LuaJIT 2.1.0-beta2)

Running the test with following options:
Number of threads: 20
Report intermediate results every 10 second(s)
Initializing random number generator from current time

Forcing shutdown in 61 seconds

Initializing worker threads...

Threads started!

[ 10s ] thds: 20 tps: 276.96 qps: 5884.44 (r/w/o: 4146.04/1108.42/629.97) lat (ms,95%): 215.44 err/s: 17.99 reconn/s: 0.00
[ 20s ] thds: 20 tps: 314.00 qps: 6681.87 (r/w/o: 4709.65/1257.81/714.41) lat (ms,95%): 150.29 err/s: 21.60 reconn/s: 0.00
[ 30s ] thds: 20 tps: 289.10 qps: 6186.99 (r/w/o: 4362.26/1159.82/664.91) lat (ms,95%): 150.29 err/s: 22.90 reconn/s: 0.00
[ 40s ] thds: 20 tps: 284.20 qps: 6040.41 (r/w/o: 4256.21/1137.30/646.90) lat (ms,95%): 132.49 err/s: 19.40 reconn/s: 0.00
[ 50s ] thds: 20 tps: 207.20 qps: 4382.53 (r/w/o: 3091.15/822.69/468.69) lat (ms,95%): 179.94 err/s: 13.60 reconn/s: 0.00
[ 60s ] thds: 20 tps: 267.65 qps: 5700.71 (r/w/o: 4015.83/1074.59/610.28) lat (ms,95%): 167.44 err/s: 19.20 reconn/s: 0.00
SQL statistics:
    queries performed:
        read:                            245868
        write:                           65645
        other:                           37381
        total:                           348894
    transactions:                        16413  (269.81 per sec.)
    queries:                             348894 (5735.37 per sec.)
    ignored errors:                      1149   (18.89 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.8276s
    total number of events:              16413

Latency (ms):
         min:                                   10.27
         avg:                                   73.47
         max:                                 2213.35
         95th percentile:                      161.51
         sum:                              1205833.27

Threads fairness:
    events (avg/stddev):           820.6500/22.37
    execution time (avg/stddev):   60.2917/0.38

可以看到数据是完全同步的！

在PGB侧加压

[root@docker35 ~]# sysbench /usr/share/sysbench/oltp_read_write.lua --db-driver=pgsql \
> --pgsql-host=172.72.6.21 --pgsql-port=5432 \
> --pgsql-user=postgres --pgsql-password=lhr --pgsql-db=lhrdb \
> --table-size=1000 --tables=10 --threads=20 \
> --events=999999999 --time=60 --report-interval=10 \
> --db-ps-mode=disable --forced-shutdown=1 run
sysbench 1.0.20 (using bundled LuaJIT 2.1.0-beta2)

Running the test with following options:
Number of threads: 20
Report intermediate results every 10 second(s)
Initializing random number generator from current time

Forcing shutdown in 61 seconds

Initializing worker threads...

Threads started!

[ 10s ] thds: 20 tps: 235.78 qps: 5027.44 (r/w/o: 3544.39/944.82/538.23) lat (ms,95%): 257.95 err/s: 15.89 reconn/s: 0.00
[ 20s ] thds: 20 tps: 256.61 qps: 5544.15 (r/w/o: 3914.04/1036.44/593.67) lat (ms,95%): 227.40 err/s: 22.78 reconn/s: 0.00
[ 30s ] thds: 20 tps: 181.34 qps: 3826.18 (r/w/o: 2694.53/723.94/407.71) lat (ms,95%): 831.46 err/s: 10.91 reconn/s: 0.00
[ 40s ] thds: 20 tps: 222.26 qps: 4656.12 (r/w/o: 3276.83/882.37/496.92) lat (ms,95%): 240.02 err/s: 11.95 reconn/s: 0.00
[ 50s ] thds: 20 tps: 196.54 qps: 4139.82 (r/w/o: 2914.00/785.87/439.96) lat (ms,95%): 292.60 err/s: 11.34 reconn/s: 0.00
[ 60s ] thds: 20 tps: 357.50 qps: 7705.61 (r/w/o: 5437.29/1442.80/825.52) lat (ms,95%): 116.80 err/s: 30.87 reconn/s: 0.00
SQL statistics:
    queries performed:
        read:                            217896
        write:                           58206
        other:                           33054
        total:                           309156
    transactions:                        14526  (241.82 per sec.)
    queries:                             309156 (5146.58 per sec.)
    ignored errors:                      1038   (17.28 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.0658s
    total number of events:              14526

Latency (ms):
         min:                                    8.17
         avg:                                   82.55
         max:                                 3373.88
         95th percentile:                      227.40
         sum:                              1199186.82

Threads fairness:
    events (avg/stddev):           726.3000/19.53
    execution time (avg/stddev):   59.9593/0.07