Oracle XE dg4odbc：无法连接到 SQL Server

Question

我无法创建从 Oracle XE 18c 到 SQL Server 2017 Express 的 DBLink！

我的服务器 centos 7.6 上有一个 Oracle XE 18c 实例和一个 SQL Server 2017 Express 实例，两者都正常工作。

我想为 SQL Server 创建一个 Oracle dblink。

感谢这条防火墙规则，我可以远程连接到 SQL Server

firewall-cmd --zone=public --add-port=1433/tcp --permanent
firewall-cmd --reload

我已经安装了 Microsoft odbc 工具

curl -o /etc/yum.repos.d/msprod.repo https://packages.microsoft.com/config/rhel/7/prod.repo
yum remove unixODBC-utf16 unixODBC-utf16-devel
yum install -y mssql-tools unixODBC-devel
ACCEPT_EULA=Y yum install msodbcsql

cd /usr/lib64
sudo ln -s libodbccr.so.2.0.0   libodbccr.so.1
sudo ln -s libodbcinst.so.2.0.0 libodbcinst.so.1
sudo ln -s libodbc.so.2.0.0     libodbc.so.1

创建了一个 DB、一个 ODBC DSN 并验证一切正常

sqlcmd -D -S roberto_dsn -U sa -P password -d robertodb -Q "select *  FROM dbo.Person"

我已经使用以下代码配置了 Oracle 实例：

nano /opt/oracle/product/18c/dbhomeXE/hs/admin/initroberto.ora

HS_FDS_CONNECT_INFO = roberto_dsn
HS_FDS_TRACE_LEVEL = 0
HS_FDS_SHAREABLE_NAME = /usr/lib64/libodbc.so
set ODBCINI=/etc/odbc.ini

nano /opt/oracle/product/18c/dbhomeXE/network/admin/listener.ora
aggiungere
SID_LIST_LISTENER =
 (SID_LIST =
   (SID_DESC=
     (SID_NAME=roberto)
     (ORACLE_HOME=/opt/oracle/product/18c/dbhomeXE)
     (PROGRAM=dg4odbc)
         (envs="LD_LIBRARY_PATH=/usr/lib64:/opt/oracle/product/18c/dbhomeXE/lib")
   )
 )

nano /opt/oracle/product/18c/dbhomeXE/network/admin/tnsnames.ora
#added
ROBERTO =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.164)(PORT = 1521))
    (CONNECT_DATA =
      (SID_NAME = roberto)
    )
        (HS=OK)
  )

我正确重启了监听器

lsnrctl stop
lsnrctl start

tnsping roberto
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.164)(PORT = 1521)) (CONNECT_DATA = (SID_NAME = roberto)) (HS=OK))
OK (0 msec)

最后我创建了 DBLink

sqlplus / as sysdba
 alter session set container = xepdb1;

 CREATE PUBLIC DATABASE LINK ROBERTO CONNECT TO
"sa" IDENTIFIED BY "password" using 'roberto';

我收到的第一个错误如下：

sqlplus sa/password@roberto
ERROR:
ORA-01017: Invalid Username/Password; Logon Denied

还可以使用 DBLink：

select * from dual@roberto;
ORA-28546: Connection initialization failed, probable Net8 admin error
ORA-28511: lost RPC connection to heterogeneous remote agent using SID=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.164)(PORT=1521)))(CONNECT_DATA=(SID_NAME=roberto)))
ORA-02063: preceding 2 lines from roberto
28546. 0000 -  "connection initialization failed, probable Net8 admin error"
*Cause:    A failure occurred during initialization of a network connection
           from the Oracle server to a second process:  The connection
           was completed but a disconnect occurred while trying to
           perform protocol-specific initialization, usually due to
           use of different network protocols by opposite sides
           of the connection.  This usually is caused by incorrect
           Net8 administrative setup for database links or external
           procedure calls.   The most frequent specific causes are:
           --  Database link setup for an Oracle-to-Oracle connection
           instead connects to a Heterogeneous Services agent
           or an external procedure agent.
           --  Database link setup for a Heterogeneous Services connection
           instead connects directly to an Oracle server.
           --  The extproc_connection_data definition in tnsnames.ora
           connects to an Oracle instance instead of an external
           procedure agent.
           --  Connect data for a Heterogeneous Services database link,
           usually defined in tnsnames.ora, does not specify (HS=).
           --  Connect data for an Oracle-to-Oracle database link,
           usually defined in tnsnames.ora, specifies (HS=).
*Action:   Check Net8 administration in the following ways
           --  When using TNSNAMES.ORA or an Oracle Names server, make sure
           that the connection from the ORACLE server uses the correct
           service name or SID.
           --  Check LISTENER.ORA on the connection end point's host machine
           to assure that this service name or SID connects to the
           correct program.
           --  Confirm in TNSNAMES.ORA or the equivalent service definition
           that service 'extproc_connection_data' does NOT contain
           (HS=), or that the service definition used by a
           Heterogeneous Services database link DOES contain (HS=).

有什么建议吗？

Answer 1

让我们试试吧：

firewall-cmd --zone=internal --add-port=1433/tcp --permanent
firewall-cmd --reload

我根本不是 Windows 专家（我是 Linux 用户），但我想您可能还需要启用内部区域以供本地使用，在您的情况下..（您声明所有服务/东西在同一台服务器上运行） 希望有用，但这是一种尝试。

Answer 2

终于解决了！ 我将微软库链接到 /usr/lib64

cd /usr/lib64
sudo ln -s /opt/microsoft/msodbcsql/lib64/libmsodbcsql-13.1.so.9.2 .
sudo ln -s /opt/microsoft/msodbcsql17/lib64/libmsodbcsql-17.3.so.1.1 .

我还更改了我在 tnsnames.ora 中添加的脚本，将 SID_NAME 替换为 SID

nano /opt/oracle/product/18c/dbhomeXE/network/admin/tnsnames.ora
#added
ROBERTO =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.164)(PORT = 1521))
    (CONNECT_DATA =
      (SID = roberto)
    )
        (HS=OK)
  )

我重新启动了数据库，现在：

select*from dual@roberto;

有效！