NAT:HNS error with Docker SQL Server container on Windows10

As with many things I post here, this article was the result of a problem I encountered, and how to resolve or work around it. I have been working with Docker on Windows and was attempting to run a container provided by Microsoft that included SQL Server. The process is fairly easy, just pull the image and run it with the appropriate command options. Unfortunately, that didn’t work. When I used the supplied command to run the container, I would get this error message:

Error response from daemon: failed to create endpoint <container name> on network nat: HNS failed with error. Unspecified error.

I spent several hours working this out over the past few days, doing web searches and trying various ideas. Lots of people experiencing the problem, but no solutions. Eventually I figured out a solution. Hopefully this helps someone else. The error above I found out indicates a problem with the default ‘nat’ network that Docker creates when you install it.  By using the default NAT network, you basically have a private network on your docker host.

You can attempt to delete that network by opening PowerShell as Administrator. (Microsoft has a good write-up on networking for Windows containers here.) Enter the following command to see a list of the virtual networks defined on your PC:

Get-NetNat

Stop Docker using the whale icon on your notification area, by right clicking on the whale and choosing Quit Docker from the menu. Then run this command:

Remove-NetNat

Enter “Y” at the prompt to remove all networks. Now restart Docker.  If this doesn’t work for you, read on.

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Photo Break – Land Between the Lakes KY

Spent some vacation time last week in western Kentucky, near the Land Between the Lakes National Recreation Area. There are two large lakes with a peninsula between them making it a boater’s paradise (although I am not a fan), and there is some great scenery. This picture was take at one of the many marina near the Kentucky Dam at sunset.

Picture copyright by me, so do not use without permission.

Run Talend Open Studio – Data Integration on Mac OS X 10.12

After downloading Talend Open Studio Data Integration this week, I ran into a similar issue to one I’ve experienced before while using Pentaho Data Integration. I extracted the TOS zip file to a folder under Applications and attempted to start the TOS_DI_macosx_cocoa application. I got an error message that Talend couldn’t access its resource library, and it shut down.

Since Talend DI runs on JAVA, I thought the issue might lie with the quarantine process in OS X Sierra, that has been “improved”. Well I was right! Keep reading to see how to get TOS to run on your Mac!

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Running Kettle (Pentaho Data Integration) on Mac OSX 10.12 Sierra

A new version of Mac OSX and a new version of Pentaho Data Integration (aka Kettle) but the same old problem getting Kettle to run. Apple tries to keep their operating system locked down and secure, so if you download applications from the Internet that aren’t from the Apple App Store, the files are quarantined.

With the update to Sierra, the quarantine process has been “improved”. Keep reading to see how to do it!

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