[英]azure function using pyodbc works fine on local machine, but not on azure cloud
I developed a simple python Azure function app using pyodbc to select a few rows from a public IP MS SQL server.我开发了一个简单的 python Azure 函数应用程序,使用 pyodbc 从公共 IP MS SQL 服务器中选择几行。 My function app runs fine on my laptop, but it doesn't work when I publish it on Azure cloud (I used Consumption - serverless plan, linux environment).我的函数应用程序在我的笔记本电脑上运行良好,但是当我在 Azure 云上发布它时它不起作用(我使用了消费 - 无服务器计划,linux 环境)。 Thru the logging, I knows that it always gets stuck at the pyodbc.connect(...) command and time-out.通过日志记录,我知道它总是卡在 pyodbc.connect(...) 命令和超时处。
#...
conn_str = f'Driver={driver};Server={server},{port};Database={database};Uid={user};Pwd={password};Encrypted=yes;TrustServerCertificate=no;Connection Timeout=30'
sql_query = f'SELECT * FROM {table_name}'
try:
conn = pyodbc.connect(conn_str) # always time-out here if running on Azure cloud!!!
logging.info(f'Inventory API - connected to {server}, {port}, {user}.')
except Exception as error:
logging.info(f'Inventory API - connection error: {repr(error)}.')
else:
with conn.cursor() as cursor:
cursor.execute(sql_query)
logging.info(f'Inventory API - executed query: {sql_query}.')
data = []
for row in cursor:
data.append({'Sku' : row.Sku, 'InventoryId' : row.InventoryId, 'LocationId' : row.LocationId, 'AvailableQuantity' : row.AvailableQuantity})
#...
The logging captured:记录捕获:
Inventory API - connection error: OperationalError('HYT00', '[HYT00] [Microsoft][ODBC Driver 17 for SQL Server]Login timeout expired (0) (SQLDriverConnect)').
I already include the pyodbc in the requirements.txt file.我已经在 requirements.txt 文件中包含了 pyodbc。 I also allows all outboundIpAddresses and possibleOutboundIpAddresses of my function app on my SQL server firewall.我还允许在我的 SQL 服务器防火墙上使用我的函数应用程序的所有 outboundIpAddresses 和 possibleOutboundIpAddresses。 My function app does not have any network restriction on Azure cloud (or at least it said so on the network settings).我的函数应用对 Azure 云没有任何网络限制(或者至少它在网络设置上是这样说的)。
my config file:我的配置文件:
driver={ODBC Driver 17 for SQL Server}
server=I tried both IP and full internet host name, both didn't work
Could someone give me a hint?有人可以给我一个提示吗? Thanks.谢谢。
Workarounds to fix the PYODBC
connection Error修复PYODBC
连接错误的解决方法
Try to use a below format尝试使用以下格式
import pyodbc
server = 'tcp:myserver.database.windows.net'
database = 'mydb'
username = 'myusername'
password = 'mypassword'
conn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)
If you are using Domain Name add TCP with domain name server = 'tcp:myserver.database.windows.net'
otherwise use the IP server = '129.0.0.1'
如果您使用域名添加TCP与域名server = 'tcp:myserver.database.windows.net'
否则使用IP server = '129.0.0.1'
If you are using port use like this 'tcp:myserver.database.windows.net,1233'
or '129.0.0.1,1233'
如果您正在使用像这样'tcp:myserver.database.windows.net,1233'
端口使用'tcp:myserver.database.windows.net,1233'
或'129.0.0.1,1233'
Try to remove additional properties like Connection_Timeout
, Trusted_certificate
and all and check now.尝试删除其他属性,如Connection_Timeout
、 Trusted_certificate
,然后立即检查。
I put the following snippet into my function to check the outbound IP, and found out that Azure use a few outbound IPs that are not listed in the [outboundIpAddresses] and [possibleOutboundIpAddresses] ( documented in this MS link )我将以下代码段放入我的函数中以检查出站 IP,并发现 Azure 使用了一些未在 [outboundIpAddresses] 和 [possibleOutboundIpAddresses] 中列出的出站 IP( 记录在此 MS 链接中)
import requests
#...
outbound_ip_response = requests.request('GET', 'https://checkip.amazonaws.com')
logging.info(f'Inventory API - main()- outbound ip = {outbound_ip_response.text}')
So, I followed the instructions in this link to setup a static outbound IP for my function app and allowed this IP to access my SQL server.因此,我按照此链接中的说明为我的函数应用设置了一个静态出站 IP,并允许该 IP 访问我的 SQL 服务器。 It worked.有效。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.