为什么 unixODBC isql 不与 Docker 上的 DB2 Community 配合使用？

问题描述 投票：0回答：1

我正在尝试让 ODBC 连接在 Linux 上工作到在 Docker 容器中运行的 DB2 社区。本机 

db2cli
命令可以工作，但我无法使用 unixODBC 工具 
isql
进行连接。我认为我有配置问题，但我陷入困境。有什么想法吗？

动机：尝试让 DB2 自动化测试适用于 arrow-odbc 来解决此问题： https://github.com/pacman82/arrow-odbc/issues/63

DB2 ODBC/CLI 驱动程序安装

下载地址： https://www.ibm.com/support/pages/download-fix-packs-version-ibm-data-server-client-packages

mkdir -p /opt/ibm/
cp v11.5.8_linuxx64_odbc_cli.tar.gz /opt/ibm/
cd /opt/ibm/
tar xvf v11.5.8_linuxx64_odbc_cli.tar.gz

export PATH=/opt/ibm/odbc_cli/clidriver/bin/:$PATH
export LD_LIBRARY_PATH=/opt/ibm/odbc_cli/clidriver/lib/

Docker 上的 DB2 社区

现在在 Docker 容器中启动 DB2 LUW 

docker run -itd --name mydb2 --privileged=true -p 50000:50000 -e LICENSE=accept -e DB2INST1_PASSWORD=testpassword -e DBNAME=testdb -v $HOME/db2_community:/database icr.io/db2_community/db2:latest

DB2 CLI/ODBC 配置

https://www.ibm.com/docs/en/db2-warehouse?topic=package-configuring

请注意，此命令仅适用于 Windows：

db2cli registerdsn -add -dsn db2docker

sudo chgrp ross /opt/ibm/odbc_cli/clidriver/cfg/db2dsdriver.cfg
sudo chmod 664 /opt/ibm/odbc_cli/clidriver/cfg/db2dsdriver.cfg

cd $HOME

db2cli writecfg add -dsn db2docker -database testdb -host localhost -port 50000

产生

ross@ross-T480-linux:/opt/ibm/odbc_cli/clidriver/cfg$ cat db2dsdriver.cfg
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<configuration>
  <dsncollection>
    <dsn alias="db2docker" host="localhost" name="testdb" port="50000"/>
  </dsncollection>

  <databases>
    <database host="localhost" name="testdb" port="50000"/>
  </databases>

</configuration>

连接验证

ross@ross-T480-linux:~$ db2cli validate -dsn db2docker -connect -user db2inst1 -passwd testpassword

===============================================================================
Client information for the current copy:
===============================================================================

Client Package Type       : IBM Data Server Driver For ODBC and CLI
Client Version (level/bit): DB2 v11.5.8.0 (s2209201700/64-bit)
Client Platform           : Linux/X8664
Install/Instance Path     : /opt/ibm/odbc_cli/clidriver
DB2DSDRIVER_CFG_PATH value: <not-set>
db2dsdriver.cfg Path      : /opt/ibm/odbc_cli/clidriver/cfg/db2dsdriver.cfg
DB2CLIINIPATH value       : <not-set>
db2cli.ini Path           : /opt/ibm/odbc_cli/clidriver/cfg/db2cli.ini
db2diag.log Path          : /opt/ibm/odbc_cli/clidriver/db2dump/db2diag.log

===============================================================================
db2dsdriver.cfg schema validation for the entire file:
===============================================================================

Success: The system db2dsdriver.cfg schema validation completed successfully without any errors.

===============================================================================
db2cli.ini validation for data source name "db2docker":
===============================================================================

Note: The validation utility could not find the configuration file db2cli.ini. 
The file is searched at "/opt/ibm/odbc_cli/clidriver/cfg/db2cli.ini".

===============================================================================
db2dsdriver.cfg validation for data source name "db2docker":
===============================================================================

[ Parameters used for the connection ]

Keywords                  Valid For     Value
---------------------------------------------------------------------------
DATABASE                  CLI,.NET,ESQL testdb
HOSTNAME                  CLI,.NET,ESQL localhost
PORT                      CLI,.NET,ESQL 50000

===============================================================================
Connection attempt for data source name "db2docker":
===============================================================================

[SUCCESS]

===============================================================================
The validation is completed.
===============================================================================

现在，尝试测试脚本


ross@ross-T480-linux:~$ echo "VALUES current_schema;" > db2_test_script.sql
ross@ross-T480-linux:~$ db2cli execsql -dsn db2docker -user db2inst1 -passwd testpassword -inputsql db2_test_script.sql 
IBM DATABASE 2 Interactive CLI Sample Program
(C) COPYRIGHT International Business Machines Corp. 1993,1996
All Rights Reserved
Licensed Materials - Property of IBM
US Government Users Restricted Rights - Use, duplication or
disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
> VALUES current_schema;
FetchAll:  Columns: 1
  1 
  DB2INST1
FetchAll: 1 rows fetched.
>

DB2 LUW 的 unixODBC 配置

好吧，现在，这就是我陷入困境的地方

编辑/etc/odbcinst.ini：

[Db2]
Description = Db2 Driver
Driver = /opt/ibm/odbc_cli/clidriver/lib/libdb2o.so
fileusage=1
dontdlclose=1

https://www.ibm.com/docs/en/db2/11.5?topic=keywords-dbalias

https://www.ibm.com/docs/en/db2/11.5?topic=file-data-server-driver-configuration-example

$HOME/.odbc.ini

[db2dockerodbc]
DRIVER=DB2
DBAlias=db2docker

然而，这失败了

ross@ross-T480-linux:~$ isql -v db2dockerodbc db2inst1 testpassword
[     ][unixODBC][IBM][CLI Driver] SQL1531N  The connection failed because the name specified with the DSN connection string keyword could not be found in either the db2dsdriver.cfg configuration file or the db2cli.ini configuration file.  Data source name specified in the connection string: "DB2DOCKERODBC".

[ISQL]ERROR: Could not SQLConnect
db2 odbc unixodbc
1个回答
0
投票

我发现我做错了什么！ DBAlias 是 

db2cli.ini
的关键字，不放进去 
.odbc.ini

相反，您需要 

.odbc.ini
中的 DSN 名称来匹配 
db2driver.cfg
中的内容，在我的示例中为 
db2docker
。 （仅供参考，看起来还有其他 DB2 配置文件，您也可以在其中定义 DSN。）

所以，这有效： ODBC 驱动程序配置

ross@ross-T480-linux:~$ cat /etc/odbcinst.ini 
[DB2]
Description = DB2 Driver
Driver = /opt/ibm/odbc_cli/clidriver/lib/libdb2o.so
fileusage=1
dontdlclose=1

IBM 驱动程序配置

ross@ross-T480-linux:~$ cat /opt/ibm/odbc_cli/clidriver/cfg/db2dsdriver.cfg
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<configuration>
  <dsncollection>
    <dsn alias="db2docker" host="localhost" name="testdb" port="50000"/>
  </dsncollection>

  <databases>
    <database host="localhost" name="testdb" port="50000"/>
  </databases>

</configuration>

ODBC 连接配置

ross@ross-T480-linux:~$ cat ~/.odbc.ini 
[db2docker]
Description = testdb on DB2 Community on Docker 
DRIVER=DB2

然后，这个就可以了

ross@ross-T480-linux:~$ isql -v db2docker db2inst1 testpassword
+---------------------------------------+
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |
+---------------------------------------+
SQL> VALUES current_date
+-----------+
| 1         |
+-----------+
| 2023-08-24|
+-----------+
SQLRowCount returns -1
1 rows fetched
SQL> VALUES current_schema
+---------------------------------------------------------------------------------------------------------------------------------+
| 1                                                                                                                               |
+---------------------------------------------------------------------------------------------------------------------------------+
| DB2INST1                                                                                                                        |
+---------------------------------------------------------------------------------------------------------------------------------+
SQLRowCount returns -1
1 rows fetched
SQL> quit
ross@ross-T480-linux:~$
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