我们的 Oracle 数据库版本为 12.1,作为独立数据库托管在 ec2 上。我正在尝试从另一个帐户访问该服务器。在精简模式下使用 python 模块
oracleDB
,我编写了一个脚本,允许我连接到数据库。
在我的本地系统中,使用 Visual Studio,我能够连接到数据库。但是,当我将相同的代码修改为 AWS Lambda 并进行测试时,我的 lambda 函数超时了。
我尝试修改数据库的VPC设置。 我将 lambda 函数设置为入站规则的一部分,并且对于 lambda iam 角色,我提供了“AWSLambdaVPCAccessExecutionRole”。
有人可以解释为什么会发生这种情况以及我该如何解决它吗?
这是我收到的错误消息:
{
"errorMessage": "2023-11-29T17:33:43.835Z 7bb3a696-cab2-4964-9a09-691995e136f1 Task timed out after 30.01 seconds"
}
下面是代码实现:
import oracledb
import csv
import os
from datetime import datetime
import boto3
import json
def lambda_handler(event, context):
try:
export_to_csv("Sample")
return {"statusCode": 200, "body": json.dumps("Hello from Lambda!")}
except Exception as e:
print(f"Error: {str(e)}")
return {"statusCode": 500, "body": json.dumps(f"Error: {str(e)}")}
def export_to_csv(table_name):
try:
# Initialize Oracle client
# Oracle connection details
oracle_user = "***"
oracle_password = "****"
oracle_dsn = "****"
s3_bucket_name = "***"
s3_prefix = "****"
aws_access_key = "****"
aws_secret_key = "****"
# Initialize Oracle connection
connection = oracledb.connect(
user=oracle_user, password=oracle_password, dsn=oracle_dsn
)
# Create an S3 client
s3_client = boto3.client(
"s3", aws_access_key_id=aws_access_key, aws_secret_access_key=aws_secret_key
)
if connection:
# Query to get column names
cursor = connection.cursor()
cursor.execute(
f"SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE TABLE_NAME = '{table_name}'"
)
column_names = [row[0] for row in cursor.fetchall()]
# Get current date
current_date = datetime.now().strftime("%Y%m%d_%H%M%S")
# Define CSV file path with current date in the filename
csv_file_path = f"output_{current_date}.csv"
with open(csv_file_path, "w", newline="") as csv_file:
csv_writer = csv.writer(csv_file)
csv_writer.writerow(column_names)
cursor.execute(f"SELECT * FROM {table_name} ")
data = cursor.fetchall()
# Write data rows
for row in data:
csv_writer.writerow(row)
# Upload CSV file to S3
s3_object_key = os.path.join(s3_prefix, f"output_{current_date}.csv")
s3_client.upload_file(csv_file_path, s3_bucket_name, s3_object_key)
print("Data transfer to S3 completed")
else:
raise Exception("Oracle connection failed.")
except Exception as e:
print(f"Error is {e}")
raise e
您解决这个问题了吗?我被 Lamda 函数困住了,无法导入 oracledb,我得到 - No module named 'oracledb'。您是否添加了特定于 oracledb 的 Lambda 层?