I use the Azure .NET Fluent SDK to copy a database:
var backupDb = await azure.SqlServers.Databases
.Define(targetDbName)
.WithExistingSqlServer(server)
.WithSourceDatabase(sourceDb)
.WithMode("Copy")
.CreateAsync();
Under the hood it makes the following API call with the mode Copy . It works well, however it gives me a short ~14% spike on the performance graph
which doesn't happen at all when I run the copy procedure within the Azure portal or with the New-AzureRmSqlDatabaseCopy cmdlet.
Is there any reason why the Fluent SDK/REST API call causes this spike? Is there any way to get rid of that?
Related
I created a simple Blazor WASM webapp using C# .NET5. It connects to some Functions which in turn get some data from a SQL Server database.
I followed the tutorial of BlazorTrain: https://www.youtube.com/watch?v=5QctDo9MWps
Locally using Azurite to emulate the Azure stuff it all works fine.
But after deployment using GitHub Action the webapp starts but then it needs to get some data using the Functions and that fails. Running the Function in Postman results in a 503: Function host is not running.
I'm not sure what I need to configure more. I can't find the logging from Functions. I use the injected ILog, but can find the log messages in Azure Portal.
In Azure portal I see my 3 GET functions, but no option to test or see the logging.
With the help of #Aravid I found my problem.
Because I locally needed to tell my client the URL of the API I added a configuration in Client\wwwroot\appsettings.Development.json.
Of course this file doesn't get deployed.
After changing my code in Program.cs to:
var apiAddress = builder.Configuration["ApiAddress"] ?? $"{builder.HostEnvironment.BaseAddress}/api/";
builder.Services.AddHttpClient("Api",(options) => {
options.BaseAddress = new Uri(apiAddress);
});
My client works again.
I also added my SqlServer connection string in the Application Settings of my Static Web App and the functions are working as well.
I hope somebody else will benefit from this. Took me several hours to figure it out ;)
I'm looking to use the Change Feed Processor SDK to monitor for changes to an Azure Cosmos DB collection, however, I have not seen clear documentation about whether the host can be run as an Azure Web Job. Can it? And if yes, are there any known issues or limitations versus running it as a Console App?
There are a good number of blog posts about using the CFP SDK, however, most of them vaguely mention running the host on a VM, and none of them or any examples running the host as an azure web job.
Even if it's possible, as a side question is, if such a host is deployed as a continuous web job and I select the "Scale" setting of the web job to Multi Instance, what are the approaches or recommendations to make the extra instances run with a different instance name, which the CFP SDK requires?
According to my research,Cosmos db trigger could be implemented in the WebJob SDK.
static async Task Main()
{
var builder = new HostBuilder();
builder.ConfigureWebJobs(b =>
{
b.AddAzureStorageCoreServices();
b.AddCosmosDB(a =>
{
a.ConnectionMode = ConnectionMode.Gateway;
a.Protocol = Protocol.Https;
a.LeaseOptions.LeasePrefix = "prefix1";
});
});
var host = builder.Build();
using (host)
{
await host.RunAsync();
}
}
But it seems only Nuget for c# sdk could be used,no clues for other languages.So,you could refer to the Compare Functions and WebJobs to balance your needs and cost.
The Cosmos DB Trigger for Azure Functions it's actually, a WebJobs extension: https://github.com/Azure/azure-webjobs-sdk-extensions/tree/dev/src/WebJobs.Extensions.CosmosDB
And it uses the Change Feed Processor.
Functions run over WebJob technology. So to answer the question, yes, you can run Change Feed Processor on WebJobs, just make sure that:
Your App Service is set to Always On
If you plan to use multiple instances, make sure to set the InstanceName accordingly and not a static/fixed value. Probably something that identifies the WebJob instance.
I have a WebJob that needs to create a JWT token to talk with an external service. The following code works when I run the WebJob on my local machine:
public static string SignES256(byte[] p8Certificate, object header, object payload)
{
var headerString = JsonConvert.SerializeObject(header);
var payloadString = JsonConvert.SerializeObject(payload);
CngKey key = CngKey.Import(p8Certificate, CngKeyBlobFormat.Pkcs8PrivateBlob);
using (ECDsaCng dsa = new ECDsaCng(key))
{
dsa.HashAlgorithm = CngAlgorithm.Sha256;
var unsignedJwtData = Base64UrlEncoder.Encode(Encoding.UTF8.GetBytes(headerString)) + "." + Base64UrlEncoder.Encode(Encoding.UTF8.GetBytes(payloadString));
var signature = dsa.SignData(Encoding.UTF8.GetBytes(unsignedJwtData));
return unsignedJwtData + "." + Base64UrlEncoder.Encode(signature);
}
}
However, when I deploy my WebJob to Azure, I get the following exception:
Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Exception while executing function: NotificationFunctions.QueueOperation ---> System.Security.Cryptography.CryptographicException: The system cannot find the file specified. at System.Security.Cryptography.NCryptNative.ImportKey(SafeNCryptProviderHandle provider, Byte[] keyBlob, String format) at System.Security.Cryptography.CngKey.Import(Byte[] keyBlob, CngKeyBlobFormat format, CngProvider provider)
It says it can't find a specified file, but the parameters I am passing in are not looking at a file location, they are in memory. From what I have gathered, there may be some kind of cryptography setting I need to enable to be able to use the CngKey.Import method, but I can't find any settings in the Azure portal to configure related to this.
I have also tried using JwtSecurityTokenHandler, but it doesn't seem to handle the ES256 hashing algorithm I need to use (even though it is referenced in the JwtAlgorithms class as ECDSA_SHA256).
Any suggestions would be appreciated!
UPDATE
It appears that CngKey.Import may actually be trying to store the certificate somewhere that is not accessible on Azure. I don't need it stored, so if there is a better way to access the certificate in memory or convert it to a different kind of certificate that would be easier to use that would work.
UPDATE 2
This issue might be related to Azure Web Apps IIS setting not loading the user profile as mentioned here. I have enabled this by setting WEBSITE_LOAD_USER_PROFILE = 1 in the Azure portal app settings. I have tried with this update when running the code both via the WebJob and the Web App in Azure but I still receive the same error.
I used a decompiler to take a look under the hood at what the CngKey.Import method was actually doing. It looks like it tries to insert the certificate I am using into the "Microsoft Software Key Storage Provider". I don't actually need this, just need to read the value of the certificate but it doesn't look like that is possible.
Once I realized a certificate is getting inserted into a store somewhere one the machine, I started thinking about how bad of a think that would be from a security standpoint if your Azure Web App was running in a shared environment, like it does for the Free and Shared tiers. Sure enough, my VM was on the Shared tier. Scaling it up to the Basic tier resolved this issue.
I have several different services running the same code base as windows azure worker roles.
I'm trying to test and see if the currently executing code is running in a specific instance. If I call to this in the management API:
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(
new Uri("https://management.core.windows.net/" + subscriptionId + "/services/hostedservices/<<servicename>>/deploymentslots/production?embed-detail=true"));
I get a response like this:
<Deployment xmlns="http://schemas.microsoft.com/windowsazure" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<Name>c8bd3b12f1bc4e0db9d8c1d59e97e48b</Name>
<DeploymentSlot>Production</DeploymentSlot>
<PrivateID>d1ea61e367e84aedb68de97eded3e896</PrivateID>
<Status>Running</Status>
<Label>SXRlbVVwZGF0ZXIgLSAzLzEzLzIwMTMgMTA6NDQ6MTUgQU0=</Label>
<Url>http://itemupdater3.cloudapp.net/</Url>
<RoleInstanceList>
<RoleInstance>
<RoleName>UpdateItems</RoleName>
<InstanceName>UpdateItems_IN_0</InstanceName>
<InstanceStatus>Ready</InstanceStatus>
</RoleInstance>
</RoleInstanceList>
<UpgradeDomainCount>1</UpgradeDomainCount>
<RoleList>
<Role>
<RoleName>UpdateItems</RoleName>
<OsVersion>WA-GUEST-OS-1.22_201302-02</OsVersion>
</Role>
</RoleList>
</Deployment>
I'm trying to test and see if the currently executing code has the same ID as this response.
If I compare:
xml["Deployment"]["Name"].InnerText;
To
RoleEnvironment.CurrentRoleInstance.Role.Instances[0].Id;
It never matches. How do I match something from the C# to the ID returned from the API?
Thanks!
You're trying to compare the name of the deployment (typically a single guid-like string, unique every time you redeploy) to the name of the instance (follows a pattern of RoleName_IN_xxx). They will never match.
I'm not 100% sure what you're trying to do, but the call to Service Management API will never give you information on your current instance - because it does not know where you run from; you can even call the API from non-Azure resources. It will simply give you data about the whole subscription.
RoleEnvironment.CurrentRoleInstance.Id will provide you with the ID of the current instance.
kevin, use the RoleEnvironment.DeploymentId instead of the RoleEnvironment.CurrentRoleInstance. This will allow you to compare what is currently running with what you get from the service management API.
I'm trying to deploy an application on Azure but I'm facing some problems.
on my dev box, all works fine but I have a problem when I'm trying to use the application once it is deployed.
on the dev box, I have an action that I do manually wich crates the test tables in my local sql server express.
but I do not know how to create the tables on the server ? so when I run my website application, it says TableNotFound.
Can sy guide me through this final step ? do I need to make sg additional ?
Thx in advance
The table storage client provides a method to create the schema in the cloud storage; I forget the name (will look it up in a second); call that when you initialise whatever you're using as your data service layer.
Edit: The following snippet is what I use:
StorageAccountInfo = StorageAccountInfo.GetDefaultTableStorageAccountFromConfiguration();
TableStorage.CreateTablesFromModel( typeof( <Context> ), info );
where <Context> is your data context object.