Forum Discussion

Cheng Peng's avatar
Cheng Peng
Former Employee
Jun 20, 2018

How to get the data from the blockchain?

Hi. I've successfully set up one application on Azure Blockchain Workbench following the documents. However, when I edit data in the SQL database, the DLT watcher of the Web app shows the changed r...
blockchain
Stuart Corrans's avatar
Stuart Corrans
Copper Contributor
Jun 30, 2018

Edit : Rather than open the eth VMSS publically, it would probably be more secure to SSH to the Worker node with Putty and then create tunnel into the Eth VM: 

https://social.msdn.microsoft.com/Forums/en-US/19b1f9af-e7af-4b23-a238-55984c6340f2/how-to-get-the-stored-block-info-using-blockhash-or-transactionhash?forum=azureblockchain

 

Re : How to open up the private network with the Ethereum VMSS is described here and confirmed works well:

 

https://medium.com/@mandur/enabling-direct-access-to-your-azure-workbench-blockchain-node-c5de76beb338

 

Obviously for dev + debugging purposes only, not for your production private chain!

 

You can then connect a Geth javascript REPL to the 8545 port.

 

You can also SSH into the ABW worker node VMSS directly using the worker load balancer public IP (xxx-lb-public-ip) using the username / password or cert you configured during the deploy. The worker node seems to house ~7 docker containers running various DLT and SQL interaction microservices.