I have surfed the web for two days looking for a better way to configure my application that I am uploading to AppFog so that it successfully connects to the mysql database in the cloud.
I have created the mysql service and I did bind it to the application. I also created tables and put some data on them using the local console ( using af tunnel mydatabase) in linux
but my apps does not seem to find the database. My application uses JDBC ... I used the database username and password and databasename given to me from the console (those funny chars in the screen) and it did not work. so I put my own credentials, still, no success...
I tried using the url that points to my application at the port given to the on the console, but still... actually, I put in the details the showed on the console to connect to the database in the cloud after deploying ... but my app seems not to find my database and its tables....
I do not know what is wrong...
please help..
MORE:
This is the code I used to try this connection:
try {
String connectionURL = "jdbc:mysql://http://someapp.aws.af.cm:10000 /OnlinePassword";
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(connectionURL, USER, PASS);
statement = conn.createStatement();
}
Use appfog environment variable called VCAP_SERVICES to automatically detect your MySQL database credentials and connection info. You can take advantage of this to display all the info which will be in JSON format and use it to connect your app to MySQL database. You may try this.
First create a servlet and retrieve your database connection using a context attribute as follows:
public class DbInfoServlet extends HttpServlet
{
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException
{
request.setAttribute("jsonContent", java.lang.System.getenv("VCAP_SERVICES"));
request.getRequestDispatcher("/index.jsp").view.forward(request, response);
}
}
Then create a index.jsp file to display you DB connection info as follows:
<body>
<p>
<!-- Click here to display DB info -->
<!-- Display of your DB connection and credentials info is here. This will show in JSON document format
-->
<c:out value="${jsonContent}" />
</p>
</body>
Use hostname(i.e. IP), port, name(i.e. database name), username, password parameters from JSON document content to modify your JDBC connection code as follows:
try {
String connectionURL = "jdbc:mysql://hostname:3306/name";
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(connectionURL, username, password);
statement = conn.createStatement();
}
If the above doesn't work, simply ensure that you are using the latest version of MySQL-connector-java jar file.
Have fun!
Related
I'm using .NET 6, Azure Function version 4 and SqlClient in my Azure Function application.
I have a connection string like this
Server=tcp:name.database.windows.net,1433;Initial Catalog=dbName;Persist Security Info=False;User ID=username;Password=password;MultipleActiveResultSets=True;Encrypt=True;TrustServerCertificate=False;Connection Timeout=120;
Normally, I access this database using GlobalProtect by providing it portal, username and password.
Now, I'm developing an Azure Function app which will access this database, but I'm getting this error
System.Private.CoreLib: Exception while executing function:
MyAzurefunction. Core .Net SqlClient Data Provider: Cannot open
server 'serverName' requested by the login. Client with IP address
'MyIpAddress' is not allowed to access the server. To enable
access, use the Windows Azure Management Portal or run
sp_set_firewall_rule on the master database to create a firewall rule
for this IP address or address range. It may take up to five minutes
for this change to take effect.
I know I'm getting this error because my IP Address doesn't have access to the server but how can I connect to it via my Connection String?
I create azure SQL database. connection string of database:
Server=tcp:<serverName>.database.windows.net,1433;Initial Catalog=<database Name>;Persist Security Info=False;User ID=server;Password={your_password};MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;
Image for reference:
I created function app with .net 6 in visual studio.
Image for reference:
I published it to Azure.
Image for reference:
Selected the ellipse(...) on the published page and selected Manage Azure App Service settings.
Image for reference:
Click on Add Setting in Application page and add the name of setting.
Image for reference:
In sql_connection enter the connection string of sql db in Local section for remote section click on Insert Value from Local.
Image for reference:
Install System.Data.SqlClient package in Manage Nuget packages of project. I added below code that connects to SQL Database :
using System.Data.SqlClient;
using System.Threading.Tasks;
[FunctionName("DatabaseCleanup")]
public static async Task Run([TimerTrigger("*/15 * * * * *")]TimerInfo myTimer, ILogger log)
{
// Get the connection string from app settings and use it to create a connection.
var str = Environment.GetEnvironmentVariable("sqldb_connection");
using (SqlConnection conn = new SqlConnection(str))
{
conn.Open();
var text = "UPDATE SalesLT.SalesOrderHeader " +
"SET [Status] = 5 WHERE ShipDate < GetDate();";
using (SqlCommand cmd = new SqlCommand(text, conn))
{
// Execute the command and log the # rows affected.
var rows = await cmd.ExecuteNonQueryAsync();
log.LogInformation($"{rows} rows were updated");
}
}
}
Above function runs every 15 seconds to update the Status column based on the ship date.
I added my IP address in database firewall settings.
Image for reference:
At 15 seconds after startup, the function runs.
Output of number of rows updated in the SalesOrderHeader table:
In this way I connected to my SQL database to my function app.
I have a web site project as an entry point and defined the connection string there:
"ConnectionStrings": {
"DataPlaygroundConnection": "Server=DataPlayhouse;Database=BusinessHandshake;User ID=bhuser1;Password=bh#12345;MultipleActiveResultSets=True;Connect Timeout=360;App=Company - Portal - Staging"
}
I started facing issues just recently that when running, I'd get Login failed for user 'bhuser1' error. But the credentials are working as I can connect to DB with any DB Manager (SSMS). Then I added Serilog to understand whats happening as the exception was thrown from Program.cs
After adding Serilog, I find this exception block:
10/20/2020 07:54:49 +04:00 Application Starting.
10/20/2020 07:54:49 +04:00 Using an in-memory repository. Keys will not be persisted to storage.
10/20/2020 07:54:49 +04:00 Neither user profile nor HKLM registry available. Using an ephemeral key repository. Protected data will be unavailable when application exits.
10/20/2020 07:54:49 +04:00 No XML encryptor configured. Key {a012bed6-42e0-475d-a11d-44ae3a5599a9} may be persisted to storage in unencrypted form.
10/20/2020 07:54:58 +04:00 An error occurred using the connection to database '"BusinessHandshake"' on server '"DataPlayhouse"'.
10/20/2020 07:54:58 +04:00 An exception occurred while iterating over the results of a query for context type '"Folio.Infrastructure.Data.Contexts.PlaygroundBiContext"'."
""Microsoft.Data.SqlClient.SqlException (0x80131904): Login failed for user 'bhuser1'.
The credentials in the json file are correct and I am able to use the same credentials in Azure Studio to connect to the database.
I do not have any customization code in context:
public partial class PlayHouseContext : DbContext
{
public PlayHouseContext()
{
}
public PlayHouseContext(DbContextOptions<PlayHouseContext> options)
: base(options)
{
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UseSqlServer("");
}
}
}
I have a similar error on my local dev machine: SqlException: Login failed for user 'bhuser1'.
On my dev machine, the credentials are correct and I can use SSMS to easily access the said DB and all the elements within.
I'm unable to understand this one.
Thanks #DaleK.
Trusted_Connection means windows authentication. I had to remove that and do the same in the appsettings.Development.json as well.
I'm deploying a web application using IIS and ASP.NET CORE.
I setup a "appsetting.json" file that include a connection string to sql server.
So far, any variation I've tried didn't work.
The strange thing about it, is that it works perfectly on a my local machine, but when I deploy it and send an HTTPPost, log file says there's an error using connection to database on server.
Well, I tried all variations I could think of.
Current connection string generated by Visual Studio is :
Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Swap;Integrated
Security=True;Connect Timeout=30;Encrypt=False;
TrustServerCertificate=False;
ApplicationIntent=ReadWrite;MultiSubnetFailover=False
I've tried changing the "Integrated Security" to False.
I've tried to replace it with User ID and password (of "sa" user).
I've tried adding a "Initial Catalog" property and set it to my database.
I'm preety sure the startup of the app is fine, because when I try to send a GET request to the main page, everything seems fine.
When I send a POST request and asks the DBcontext to Add and SaveChanges, it shows this error :
fail: Microsoft.EntityFrameworkCore.Database.Connection[20004]
An error occurred using the connection to database 'Swap' on server
'(localdb)\MSSQLLocalDB'.
This is the function that I tried to send a HTTPPost request to:
byte[] j = new byte[(int)Request.ContentLength];
Request.Body.Read(j, 0, (int)Request.ContentLength);
string str = Encoding.ASCII.GetString(j);
TokenSet tokenSet = new TokenSet {Token = str };
sqlTokensetData.Add<TokenSet>(tokenSet);
sqlTokensetData.SaveChanges();
HttpClient notificationSender = new HttpClient();
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post,
"https://fcm.googleapis.com/fcm/send");
request.Headers.TryAddWithoutValidation("Authorization", "key="
<somekey>);
request.Headers.TryAddWithoutValidation("Sender", "id=<id>");
Message pushNotification = new Message(new string[] { str }, "Success!"
<somestring>);
request.Content = new
StringContent(JsonConvert.SerializeObject(pushNotification)
,Encoding.UTF8,"application/json");
HttpResponseMessage output = await notificationSender.SendAsync(request);
Log file error:
https://anotepad.com/notes/9a8jxa
I hope that the "str" string will be inserted to the database.
Thank you.
Well, Basicly, Thanks to the comments above I've managed to solve it.
What you need to do if you come by the same error:
1.Download SQL Server Express -
https://www.microsoft.com/en-us/sql-server/sql-server-editions-express as said above.
and configure the SQL Server however you see fit.
2.Configure sa user, set password and enable it.
3. If SQL Authentication doesn't work, then in Microsoft SQL Server Management Studio -> Right-click the server -> Properties -> Server Authentication -> Change to SQL Server and Windows Authentication
4. Change connection string to :
Data Source=;Initial Catalog=User ID=sa;
Password=;
Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;
ApplicationIntent=ReadWrite;MultiSubnetFailover=False
It worked for me.
I have an application built using the ASP.NET 5 runtime - I would like to connect it to an on-premise SQL Server Database.
After some research I've already created the user-provided service with the relevant credentials, however I am unsure what to do next (i.e. writing the necessary code connecting it in ASP.NET).
Some further googling suggests to use Secure Gateway? but is this the only way? the cloud I am working on is dedicated and does not have the Secure Gateway service. Is there a workaround for this?
(Note: The application I'm working on is based on the ASP.NET-Cloudant example on IBM Github, if that helps).
https://github.com/IBM-Bluemix/asp.net5-cloudant
The Secure Gateway service isn't required as long as the Bluemix environment can connect to the server running SQL Server. This might require your firewall rules to be a little more relaxed on the SQL Server, or you can contact IBM to create a secure tunnel as Hobert suggested in his answer.
Aside from that issue, if you're planning to use Entity Framework to connect to your SQL Server, it should work similar to the existing tutorials on the asp.net site. The only difference will be in how you access the environment variables to create your connection string.
Assuming that you created your user-provided service with a command similar to this:
cf cups my-sql-server -p '{"server":"127.0.0.1","database":"MyDB","user":"sa","password":"my-password"}'
Your connection string in your Startup.cs file's ConfigureServices method would then look something like this:
string vcapServices = Environment.GetEnvironmentVariable("VCAP_SERVICES");
string connection = "";
if (vcapServices != null)
{
string myServiceName = "my-sql-server";
JArray userServices = (JArray)JObject.Parse(vcapServices)?["user-provided"];
dynamic creds = ((dynamic)userServices
.FirstOrDefault(m => ((dynamic)m).name == myServiceName))?.credentials;
connection = string.Format(#"Server={0};Database={1};User Id={2}; Password={3};",
creds.server, creds.database, creds.user, creds.password);
}
Update
The cloudant boilerplate that you're modifying doesn't use Entity Framework because cloudant is a NoSQL database, so it's a bit different than connecting to SQL Server. The reason that the boilerplate calls .Configure to register the creds class is that it needs to use that class from another location, but when using Entity Framework you simply need to use the credentials when adding EF to the services in the Startup.cs file so you don't need to use .Configure<creds>.
If you follow the guide here, the only part you'll need to change is the line var connection = #"Server=(localdb)\mssqllocaldb;Database=EFGetStarted.AspNet5.NewDb;Trusted_Connection=True;"; replacing it with the code above to create the connection string instead of hard-coding it like they did in the example tutorial.
Eventually, your ConfigureServices method should look something like this, assuming your DbContext class is named BloggingContext like in the example:
public void ConfigureServices(IServiceCollection services)
{
string vcapServices = Environment.GetEnvironmentVariable("VCAP_SERVICES");
string connection = "";
if (vcapServices != null)
{
string myServiceName = "my-sql-server";
JArray userServices = (JArray)JObject.Parse(vcapServices)?["user-provided"];
dynamic creds = ((dynamic)userServices
.FirstOrDefault(m => ((dynamic)m).name == myServiceName))?.credentials;
connection = string.Format(#"Server={0};Database={1};User Id={2}; Password={3};",
creds.server, creds.database, creds.user, creds.password);
}
services.AddEntityFramework()
.AddSqlServer()
.AddDbContext<BloggingContext>(options => options.UseSqlServer(connection));
services.AddMvc();
}
And then your Startup method would be simplified to:
public Startup(IHostingEnvironment env)
{
var configBuilder = new ConfigurationBuilder()
.AddJsonFile("config.json", optional: true);
Configuration = configBuilder.Build();
}
Excellent!
In Public Bluemix Regions, you would create and use the Secure Gateway Service to access the On-Premise MS SQL Server DB.
In your case, as a Bluemix Dedicated client, you should engage your IBM Bluemix Administration Team so they can work with your Network Team to create a tunnel between the Dedicated Bluemix Region and your On-Premise MS SQL DB Server.
If you want to connect directly from your Asp.Net Core application to a SQL Server you actually don't need a Secure Gateway.
For example, if you want to use a SQL Azure as your Database you can simply add the given connection string in your application.
But, for pratical and security reasons, you should create a User-Provided Service to store your credentials (and not use statically in your code), and pull your credentials from you VCAP_SERVICES simply adding SteelToe to your Cconfiguration Builder. (Instead of use parse the configuration manually with JObjects and JArrays)
Step-by-step:
In your CloudFoundry console create a User-Provided Service using a Json:
cf cups MySqlServerCredentials -p '{"server":"tcp:example.database.windows.net,1433", "database":"MyExampleDatabase", "user":"admin", "password":"password"}'
Obs.: If you use Windows console/Powershell you should escape you double quotes in Json like:
'{\"server\":\"myserver\",\"database\":\"mydatabase\",\"user\":\"admin\",\"password\":\"password\"}'
After you have created your User-Provided Service you should Connect this Service with your application in Bluemix Console.
Then, In your application add the reference to SteelToe CloudFoundry Steeltoe.Extensions.Configuration.CloudFoundry
In your Startup class add:
using Steeltoe.Extensions.Configuration;
...
var builder = new ConfigurationBuilder()
.SetBasePath(basePath)
.AddJsonFile("appsettings.json")
.AddCloudFoundry();
var config = builder.Build();
Finally, to access your configurations just use:
var mySqlName = config["vcap:services:user-provided:0:name"];
var database = config["vcap:services:user-provided:0:credentials:database"];
var server = config["vcap:services:user-provided:0:credentials:server"];
var password = config["vcap:services:user-provided:0:credentials:password"];
var user = config["vcap:services:user-provided:0:credentials:user"];
OBS.: If you're using Azure, remember to configure your Database firewall to accept the IP of your Bluemis application, but as default Bluemix don't give a static IP address you have some options:
Buy a Bluemix Statica service to you application (expensive)
Update firewall rules with REST put with the current IP of application (workaroud)
Open your Azure Database Firewall to a broad range of IPs. (Just DON'T)
More info about SteelToe CloudFoundry in :
https://github.com/SteeltoeOSS/Configuration/tree/master/src/Steeltoe.Extensions.Configuration.CloudFoundry
I have created a cloud sql instance in a PHP project and have made the billing procedure successfully. The project works.
Now, I want to access my database from another project but this time in Java SDK project with servlets.
Using the example in https://developers.google.com/appengine/
docs/java/cloud-sql/
In Java project I have:
project id: javaProjectID
In php project id I have:
project id: phptestID
instance name: phpinstanceName
database: dbname
In my code in Servlet i do the below connection:
String url = "jdbc:google:mysql://phptestID:phpinstanceName/dbname?user=root";
Connection conn = (Connection) DriverManager.getConnection(url);
(...>> The connection fails in this point and doesn't access the database to make the below query )
String sqlStmt = "SELECT * FROM sometable";
PreparedStatement stmt = conn.prepareStatement(sqlStmt);
ResultSetres = stmt.executeQuery(sqlStmt);
How can I access my database in another project?? Is there any other way except
your-project-id:your-instance-name???
You will need to give the new app engine app access to your CloudSQL instance. To do this go to the Cloud SQL instance in the console, edit it, go down to Authorized App Engine Applications and then add the app id of the new App Engine app.
UPDATE:
The most recent steps look like in the attached screenshot below