I got a free Oracle Cloud Infrastructure (OCI) service from Oracle for two months.
I would like to create an Oracle database and connect to it directly over the internet (I don't want to create a VPN tunnel).
Do you know how I should do it?
One way to do it, use this URL pattern:
jdbc:oracle:thin:/#OCI_DB_NAME_high?TNS_ADMIN=PATH_TO_THE_WALLET_FOLDER
user name and password as usual, the Wallet should be unzipped.
Properties info = new Properties();
info.put(OracleConnection.CONNECTION_PROPERTY_USER_NAME, DB_USER);
info.put(OracleConnection.CONNECTION_PROPERTY_PASSWORD, DB_PASSWORD);
...
OracleDataSource ods = new OracleDataSource();
ods.setURL(DB_URL);
ods.setConnectionProperties(info);
OracleConnection connection = (OracleConnection) ods.getConnection();
I solved the problem myself.
To get to the database server without configuring a VPN link, you can create a virtual machine accessible via an external IP address and ssh from it to a local address from the 10.0.0.0 network
Here is the Spring Boot sample to connect to OCI managed autonomous database.
https://github.com/oracle-devrel/oci-sdk-java-samples/tree/main/usecases/connect-autonomous-database
Related
I have a constructed DB that have a structure I need. I works with this by using Neo4j Desktop. Now I've deployed an app what works with my db in local network, but can't work from eternal networks. Now I need to fix it but I can't find any info about that.
When I've tried to connect to db via address http://localhost:PORT from my phone connected to same network I didn't got anything related to db.
I tried to add some settings in neo4j.conf file such as org.neo4j.server.webserver.address=0.0.0.0 and dbms.connector.http.address=0.0.0.0:7474.
Also I have a DDNS but I don't know how can I use it to connect to my db.
I'm expecting that I can connect to my db from any network.
How does one go about uploading a database like Apache Cassandra after creating one? Furthermore, is there a way to upload/share only its skeleton structure, without the data gathered in it? I'm on MacOS and would like to use Python to do all of this. Thank you!
Based on your second comment, I guessed it to mean you want the database to be remotely accessible to clients/apps not installed locally.
Clients/apps connect to Cassandra on the IP address set for rpc_address and the CQL port set for native_transport_port (default is 9042) set in cassandra.yaml.
You mentioned that your Cassandra instance is running on your laptop so only clients/apps running on your local network can access it if you configure rpc_address to an IP address accessible on the network (default is localhost).
If you're just trying out Cassandra and want to collaborate with other developer friends, try Astra and launch Cassandra instance on the free-tier (no credit card required). With it you can share the database credentials with your friends and they can connect to it over the internet.
You can connect to Astra from your Python app using the Python driver. Otherwise, Astra includes Stargate.io pre-configured and ready to use. Stargate is a data access gateway that lets you connect to Cassandra from your app using REST API, GraphQL API or JSON/Doc API without having to learn CQL. For more info, see Connecting to your Astra database. Cheers!
I would like to connect my SQL Database on Siteground Hosting to Power BI through the SQL Server connection. However, I need to get the following information which I am not sure where to get:
Siteground Database Credentials in the format: servername:portname
Username & Password (which I have)
And finally, when I inserted the IP Address in item no.1, the error received is as below:
Based on the error above, I figured it could be either:
(i) the IP address I have inserted is wrong; or
(ii) I need to allow remote access to my database on Siteground CPanel:
If item (ii) is the reason for the error, in order to allow PowerBI to access the database, I would need to insert the IP Address of my PowerBI Online which I do not know how to get
I need assistance basically connecting my PowerBI application to my SQL Database created on my hosting account Siteground
Any help is much appreciated.
Your Siteground control panel suggest that the database is MySQL - your are trying to connect to a SQL Server database. They are not the same thing which is probably why it doesn't work.
Try using the MySQL connector for Power BI
First, as Martin Cairney told you, the connector that you are using is wrong - Microsoft SQL Server and MySQL are completely different products, which are not compatible. First change the connector.
The list of IP addresses is something dynamic. There is no guarantee, that Power BI will try to connect to your database from a single IP address only, nor that this IP address will stay the same for a long time. If you go this way, you should maintain this on a weekly basis and monitor for changes. The list of IP addresses can be downloaded from these json files:
Public: https://www.microsoft.com/en-us/download/details.aspx?id=56519
US Gov: http://www.microsoft.com/en-us/download/details.aspx?id=57063
Germany: http://www.microsoft.com/en-us/download/details.aspx?id=57064
China: http://www.microsoft.com/en-us/download/details.aspx?id=57062
They are updated weekly.
Better solution is to move your database to Azure (e.g. Azure MySQL service or MySQL installed in Virtual Machine in Azure) or to migrate to another data source.
(I am a sql noob and I just can not figure this out on my own)
For some time now I have been trying to establish a connection to a SQL database in codename one but to no avail. First I tried connecting to a MariaDB database from one.com. All that's needed for the connection is
Database db = Display.getInstance().openOrCreate("databaseName");
if I am not mistaken, but I am guessing this implies that I have somehow already established a connection to the database. This is not the case however so it creates a new .sql file, right? I can recall that you can connect to a database in the services tab in Netbeans. I chose the MySQL(Connector/ J Driver) which should work with MariaDB, or should it? I entered all my data and i says that it can not establish connection to the database.
the error i get
So I thought I might as well try using localhost. I used XAMPP to host a database and connected in the netbeans services tab.
connected?
Now testing was needed to see if this works. I started the SQL journey with this https://www.codenameone.com/manual/files-storage-networking.html#_sql and integrated the part after "You can probably integrate this code into your app as a debugging tool". I changed database name to "mybase" (it's existance can be confirmed in picture 2). Ran the app, opened the dialog, entered "select ID from customers" and got: java.sql.SQLException: [SQLITE_ERROR] SQL error or missing database (no such table: customers) It does not get past the first call to "executeQuery". The customers table definitely exists so what am I missing to establish connection?
I really need instructions to connect to the localhost database and ideally also to the one hosted by my webhost provider.
Thanks,
Jona
The Database class is to access the SQLite DB on the mobile device. To connect to external databases, you'd have to do something different, such as a ConnectionRequest or Socket I think.
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