Getting error messages. Seems this is not possible ?
message is :
The JSON provided in the request body is invalid. Property 'server' value 'postgres-mydatabase123.postgres.database.azure.com' is not acceptable.
According to the documentation this is not possible as currently the support output sinks are
Azure Data Lake Store
SQL Database Blob storage
Event Hub
Power BI
Table Storage
Service Bus Queues
Service Bus Topics
Azure Cosmos DB
Azure Functions (In Preview)
Out of all of these Azure Functions or Event Hub might be interesting to you as they allow custom code to process the data. In your case that would be sending it to the PostgreSQL database.
Related
I am trying to get data from my Azure IoT hub to a database, which will be then displayed on a website.
I have seen many ways to ingest data such as azure data explorer cluster and stream analytics jobs. However, the issue i have with data explorer is that i cannot get connection details for the database so i cot connect to it using code. As for stream analytics jobs, MySQL databases are not supported, and I have only have experience with MySQL.
Does anyone know a way i can ingest data from my Azure IoT hub to a MySQL database? Thanks in advance.
You will have to write some code to do this.
You can for instance create an Azure Function that uses an IoTHubTrigger or EventHubTrigger so that the Function receives the messages that are available on the IoT Hub. In the Function, you write code to make sure that the data is inserted in the appropriate tables in your database.
Find some documentation regarding this here.
I sent json format from Esp8266 to iot hub but I can't send data from iot hub to sql database by Stream Analytics
When I test query in Stream Analytics job, it's ok but I run Stream Analytics job data can't record to sql database and informed that "degraded"
It sounds like your job may not have the correct permissions to the SQL database.
I suggest configuring a Managed Identity for your Stream Analytics job and using that to create a user with the required permissions in Azure SQL DB as described here
I have data in Azure IOT hub.
I know we can transfer this data to any cloud based storage like
for storing IoT data in Azure cloud such as:
Azure Blob storage if you need to store a large amount of cold data with a low-prices. Stored IoT data can be on-demand loaded into some SQL Database or SQL DW to run analytic using standard queries or analyzed using some Azure Machine Learning service.
Azure SQL Database or Azure SQL DW if you can parse incoming data and store it in the relational format.
Azure SQL Database if you need to store semi-structured data formatted as JSON and you need to correlate IoT information with some existing relational data.
Azure SQL Database or Azure Cosmos DB if you need to store semi-structured data formatted as JSON.
But can we get the Azure IOT data to on premises local storage database server.
You can get the data by having a service that connect to Events endpoint and insert the data in your local database. Your service will be on-premises or have access to your on-premises database.
I want to monitor some events coming from my application.
One option is to send data to Azure Event Hub and use stream analytics to do some post-processing and enter the data into cosmos db.
Another option is to store to cosmos db from application and run a periodic azure function to do the processing and store it back.
What is the right way to do it? Is there a better way to do it?
The best architecture way is to have Event Hubs to Cosmos DB. I have done the same implementations using Application -> EventHub -> ChangeFeed Azure Function -> Cosmosdb
You can read about Here.
ChangeFeed is offered by Azure Cosmos DB out of the box for this case. It works as a trigger on Cosmos DB change.
It depends on the kind of processing that you would like to do with the events ingested. If it is event at a time processing, a simple Azure Function with CosmosDB changefeed processor might be enough. If you would like to do stateful processing like windowing or event order based computation, azure Stream Analytics would be better. Stream Analytics also provides native integration to PowerBI dashboards. Same job can send the data both to CosmosDB and PowerBI. If you are going to use Azure Stream Analytics, you will have to use EventHub for event ingestion. Using EventHub for ingestion also has other benefits like being able to archive events to blob storage.
I generated a SAS signature using this RedDog tool and successfully sent a message to Event Hub using the Events Hub API refs. I know it was successful because I got a 201 Created response from the endpoint.
This tiny success brought about a question that I have not been able to find an answer to:
I went to the azure portal and could not see the messages I created anywhere. Further reading revealed that I needed to create a storage account; I stumbled on some C# examples (EventProcessorHost) which requires the storage account creds etc.
Question is, are there any APIs I can use to persist the data? I do not want to use the C# tool.
Please correct me if my approach is wrong, but my aim is to be able to post telemetries to EventHub, persist the data and perform some analytics operations on it. The telemetry data should be viewable on Azure.
You don't have direct access to the transient storage used for EventHub messages, but you could write a consumer that reads from the EventHub continuously and persist the messages to Azure Table or to Azure Blob.
The closest thing you will find to a way to automatically persist messages (as with Amazon Kinesis Firehose vs Amazon Kinesis which EventHubs are basically equivalent to), would be to use Azure Streaming Analytics configured to write the output either to Azure Blob or to Azure Table. This example shows how to set up a Streaming Analytics job that passes the data through and stores it in SQL, but you can see the UI where you can choose a choice such as Azure Table. Or you can get an idea of the options from the output API.
Of course you should be aware of the requirements around serialization that led to this question
The Event Hub stores data for maximum of 7 days; that’s too in standard pricing tier. If you want to persist the data for longer in a storage account, you can use the Event Hub Capture feature. You don’t have to write a single line of code to achieve this. You can configure it through Portal or ARM template. This is described in this document - https://learn.microsoft.com/en-us/azure/event-hubs/event-hubs-capture-overview
The event hub stores it’s transient data in Azure storage. It doesn’t give any more detail in relation to the data storage. This is evident from this documentation - https://learn.microsoft.com/en-us/azure/event-hubs/configure-customer-managed-key
The storage account you need for EventProcessorHost is only used for checkpointing or maintaining the offset of the last read event in a partition.