📣 1.登陆报错

✨1.1 报错现象

GGSCI (rhel64) 1> dblogin userid ogg,password ogg

2022-10-07 20:44:15  INFO    OGG-03542  Failed to connect to the database. Verify that the connection string and following environment variables are correct: 
TNS_ADMIN = /u01/app/oracle/product/11.2.0/dbhome_1/network/admin
LD_LIBRARY_PATH = /ogg:/u01/app/oracle/product/11.2.0/dbhome_1/lib:/u01/app/oracle/product/11.2.0/dbhome_1/rdbms/lib:/lib:/usr/lib.
Error: OCI Error ORA (status = 12545-ORA-12545: Connect failed because target host or object does not exist
)

✨1.2 排查过程

从以上报错可以发现，OGG 21C 在登陆的时候，提示环境变量有问题，于是先排查环境变量

[oracle@rhel64 ~]$ more .bash_profile

export OGG_HOME=/ogg
export PATH=$PATH:$ORACLE_HOME/bin:$OGG_HOME
export LD_LIBRARY_PATH=$OGG_HOME:$ORACLE_HOME/lib:$ORACLE_HOME/rdbms/lib:/lib:/usr/lib
alias ggsci='cd $OGG_HOME;ggsci'

感觉没有什么问题，于是去查询官网，官网有如下的解释：

OGG 21c自带了客户端lib文件，如果软件位于中间层（某些特殊架构下，OGG软件与Oracle软件不在同一台服务器上），可以不需要安装Oracle客户端。但是自此，通过GGSCI连接数据库就需要指定TNS，环境变量则需要配置TNS_ADMIN的具体路径。

✨1.3 处理方法

将环境变量进行了变更，加入了TNS_ADMIN变量，登陆的时候要指定TNS名，修改后的变量如下：

[oracle@rhel64 ~]$ vi ~/.bash_profile

export OGG_HOME=/ogg
export PATH=$PATH:$ORACLE_HOME/bin:$OGG_HOME
##加入了TNS_ADMIN
export TNS_ADMIN=$ORACLE_HOME/network/admin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$ORACLE_HOME/rdbms/lib:/lib:/usr/lib
export LD_LIBRARY_PATH=$OGG_HOME:$LD_LIBRARY_PATH
alias ggsci='cd $OGG_HOME;ggsci'
 
[oracle@rhel64 ~]$ source ~/.bash_profile

同时要增增加tns的配置，tns配置如下：

```bash
[oracle@rhel64 ~]$ more $ORACLE_HOME/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

MES =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = rhel64)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = MES)
    )
  )

于是再次登陆就OK了

```bash
[oracle@rhel64 ~]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle
Version 21.3.0.0.0 OGGCORE_21.3.0.0.0_PLATFORMS_210728.1047_FBO
Oracle Linux 7, x64, 64bit (optimized), Oracle Database 21c and lower supported versions on Jul 29 2021 03:59:23
Operating system character set identified as UTF-8.

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

GGSCI (rhel64) 2> dblogin userid ogg@MES,password ogg                    
Successfully logged into database.

📣 2.mgr 进程启动报错

✨2.1 报错现象

GGSCI (rhel64 as ogg@MES) 9> start mgr
Process creation error: Cannot find executable file './mgr'

✨2.2 排查过程

刚开始先排查是否编辑的mgr是否有问题，如下：

port 7809
DYNAMICPORTLIST 7810-7829
userid ogg@MES, PASSWORD ogg
AUTOSTART EXTRACT *
AUTORESTART EXTRACT *
PURGEOLDEXTRACTS /ogg/dirdat/*,usecheckpoints, minkeepdays 8
LAGREPORTHOURS 1
LAGINFOMINUTES 30
LAGCRITICALMINUTES 45
ACCESSRULE, PROG *, IPADDR 12.*.*.*, PRI 1, ALLOW

参数说明：
PORT: 指定 Manager 使用的端口。
Dynamicportliist:配置了捕获和复制进程使用的端口范围。
AUTORESTART: 参数使抽取/复制进程失败后自动重启。
PURGEOLDEXTRACTS 参数指定：当根据 checkpoint 发现已经完成抽取和复制的 trail 文件将被自动删除，但保留最近8天。
ACCESSRULE:类似网络防火墙规则

以上确实是没有问题的，于是再次确认环境变量

确定每次登陆OGG的时候，是没有进入OGG的目录导致，环境变量误写导致，找不到目录

✨2.3 处理方法

修改环境变量为正确的，再次登陆编辑进程参数，启动OK

环境变量如下：
[oracle@rhel64 ~]$ vi .bash_profile

#加入以下变量
[oracle@rhel64 ~]$ vi ~/.bash_profile

export OGG_HOME=/ogg
export PATH=$PATH:$ORACLE_HOME/bin:$OGG_HOME
export TNS_ADMIN=$ORACLE_HOME/network/admin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$ORACLE_HOME/rdbms/lib:/lib:/usr/lib
export LD_LIBRARY_PATH=$OGG_HOME:$LD_LIBRARY_PATH
alias ggsci='cd $OGG_HOME;ggsci'
 
[oracle@rhel64 ~]$ source ~/.bash_profile

启动MGR进程，确认OK

[oracle@rhel64 ~]$ ggsci
Oracle GoldenGate Command Interpreter for Oracle
Version 21.3.0.0.0 OGGCORE_21.3.0.0.0_PLATFORMS_210728.1047_FBO
Oracle Linux 7, x64, 64bit (optimized), Oracle Database 21c and lower supported versions on Jul 29 2021 03:59:23
Operating system character set identified as UTF-8.

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

GGSCI (rhel64) 2> view param mgr

port 7809
DYNAMICPORTLIST 7810-7829
userid ogg@MES, PASSWORD ogg
AUTOSTART EXTRACT *
AUTORESTART EXTRACT *
PURGEOLDEXTRACTS /ogg/dirdat/*,usecheckpoints, minkeepdays 8
LAGREPORTHOURS 1
LAGINFOMINUTES 30
LAGCRITICALMINUTES 45
ACCESSRULE, PROG *, IPADDR 12.*.*.*, PRI 1, ALLOW

GGSCI (rhel64) 3> start mgr
Manager started.

GGSCI (rhel64) 5> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING