無法使用 FreeTDS 連接到 Docker 容器內的 Microsoft SQL Server

Question

我想使用 Docker for Windows 在我的公司網絡上托管 Shiny 應用程序。

如何設置 Docker、odbc.ini、odbcinst.ini、freetds.conf 或其他可能的文件，以便我的 Shiny 應用程序可以從內部 Microsoft SQL Server (2016) 數據庫查詢數據？ 數據庫服務器不在運行 Docker 容器的同一台機器上運行。

我不知道我是否需要更新版本的 FreeTDS 或者我是否錯誤配置了其中一個文件。 我嘗試在所有文件中使用服務器的 IP 地址而不是sql-server.host.com ，但在下面收到相同的錯誤消息。

$ tsql -C輸出：

Compile-time settings (established with the "configure" script)
                            Version: freetds v1.00.104
             freetds.conf directory: /etc/freetds
     MS db-lib source compatibility: no
        Sybase binary compatibility: yes
                      Thread safety: yes
                      iconv library: yes
                        TDS version: 4.2
                              iODBC: no
                           unixodbc: yes
              SSPI "trusted" logins: no
                           Kerberos: yes
                            OpenSSL: no
                             GnuTLS: yes
                               MARS: no

$ odbcinst -j輸出：

unixODBC 2.3.6
DRIVERS............: /etc/odbcinst.ini
SYSTEM DATA SOURCES: /etc/odbc.ini
FILE DATA SOURCES..: /etc/ODBCDataSources
USER DATA SOURCES..: /root/.odbc.ini
SQLULEN Size.......: 8
SQLLEN Size........: 8
SQLSETPOSIROW Size.: 8

$ cat etc/odbcinst.ini輸出：

[FreeTDS]
Description = FreeTDS unixODBC Driver
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so

$ cat etc/odbc.ini輸出：

[sql-server]
driver = FreeTDS
server = sql-server.host.com
port = 1433
TDS_Version = 4.2

$ cat etc/freetds/freetds.conf輸出：

[sql-server]
host = sql-server.host.com
port = 1433
tds version = 4.2

R中的命令給出錯誤：

con <- dbConnect(odbc::odbc(),
          driver = "FreeTDS",
          server = "sql-server.host.com",
          port = 1433,
          database = "database name",
          TDS_Version = 4.2)

錯誤：

Error: nanodbc/nanodbc.cpp:950: 08001: [FreeTDS][SQL Server]Unable to connect to data source 
Execution halted

碼頭工人文件：

# Install R version 3.5.3
FROM r-base:3.5.3

# Install Ubuntu packages
RUN apt-get update && apt-get install -y \
    sudo \
    gdebi-core \
    pandoc \
    pandoc-citeproc \
    libcurl4-gnutls-dev \
    libcairo2-dev/unstable \
    libxt-dev \
    libssl-dev \
    unixodbc unixodbc-dev \
    freetds-bin freetds-dev tdsodbc

# Edit odbc.ini, odbcinst.ini, and freetds.conf files
RUN echo "[sql-server]\n\
host = sql-server.host.com\n\
port = 1433\n\
tds version = 4.2" >> /etc/freetds.conf

RUN echo "[FreeTDS]\n\
Description = FreeTDS unixODBC Driver\n\
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so" >> /etc/odbcinst.ini

RUN echo "[sql-server]\n\
driver = FreeTDS\n\
server = sql-server.host.com\n\
port = 1433\n\
TDS_Version = 4.2" >> /etc/odbc.ini

# Install R packages that are required
RUN R -e "install.packages(c('shiny', 'DBI', 'odbc'), repos='http://cran.rstudio.com/')"

# copy the app to the image
RUN mkdir /root/shiny_example
COPY app /root/shiny_example

COPY Rprofile.site /usr/lib/R/etc/

# Make the ShinyApp available at port 801
EXPOSE 801

CMD ["R", "-e", "shiny::runApp('/root/shiny_example')"]

Docker 構建和運行命令：

docker build . -t shiny_example
docker run -it --network=host -p 801:801 shiny_example

請注意，以下 R 代碼適用於運行 Docker 容器的 Windows 機器，並且我可以成功查詢數據庫：

library(DBI)
con <- dbConnect(odbc::odbc(),
          driver = "SQL server",
          server = "sql-server.host.com")

$ isql -v sql-server輸出：

[S1000][unixODBC][FreeTDS][SQL Server]Unable to connect to data source
[01000][unixODBC][FreeTDS][SQL Server]Unknown host machine name.
[ISQL]ERROR: Could not SQLConnect

$ tsql -S sql-server輸出：

locale is "en_US.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
Error 20013 (severity 2):
        Unknown host machine name.
There was a problem connecting to the server

Answer 1

看起來你是對的，但可能漏了一點。 我有類似的問題，但我能夠解決它！

在python + mssqlserver + pymssql + docker(unbuntu16.04 base image)

沒有修復結束，在運行我的代碼（使用 pymssql）時 給了我這個錯誤

Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
  File "src/pymssql.pyx", line 645, in pymssql.connect
pymssql.InterfaceError: Connection to the database failed for an unknown reason.

我跟着創建了 3 個文件並復制到圖像中！

• 使用托管 MSsql 服務器的myserver.orgName.com 。 碼頭工人/odbcinst.ini

[FreeTDS]
Description = v0.91 with protocol v7.3
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so

碼頭工人/ odbc.ini

[myserverdsn]
Driver = FreeTDS
Server = myserver.orgName.com
Port = 1433
TDS_Version = 7.3

碼頭工人/freetds.conf

[global]
    # TDS protocol version, use:
    # 7.3 for SQL Server 2008 or greater (tested through 2014)
    # 7.2 for SQL Server 2005
    # 7.1 for SQL Server 2000
    # 7.0 for SQL Server 7
    tds version = 7.2
    port = 1433

    # Whether to write a TDSDUMP file for diagnostic purposes
    # (setting this to /tmp is insecure on a multi-user system)
;   dump file = /tmp/freetds.log
;   debug flags = 0xffff

    # Command and connection timeouts
;   timeout = 10
;   connect timeout = 10

    # If you get out-of-memory errors, it may mean that your client
    # is trying to allocate a huge buffer for a TEXT field.
    # Try setting 'text size' to a more reasonable limit
    text size = 64512

# A typical Microsoft server
[myserverdsn]
    host = myserver.orgName.com
    port = 1433
    tds version = 7.3

Dockerfile 內容

RUN apt-get -y install unixodbc unixodbc-dev freetds-dev freetds-bin tdsodbc 

COPY freetds.conf /etc/freetds/freetds.conf
COPY odbc.ini /etc/odbc.ini
COPY odbcinst.ini /etc/odbcinst.ini

測試有效的python代碼：

python 
>>> import pymssql
>>> conn = pymssql.connect(server = 'myserver.orgName.com',
                   user = 'myusername',
                      password = 'mypassword',
                      database= 'mydbname')

工作沒有錯誤！