Restoring data from a broken Business Central Docker Container

 By Steve Endow 

(This blog post is inspired by a forum question. Credit to Arvydas for the question and sharing the solution.)

What if I made the mistake of storing some "worthwhile" data in a Business Central Docker container over the course of several months?  Perhaps it was test data or data imports that I didn't think I would ever need--but then 3 months later I realized that the accumulated data was valuable.

In theory, no big deal.  If you realize that you want to keep the data from a working container, Stefan Maroń has a blog post with instructions on converting that Container into an Image using "docker commit".  Just create an image and you can make new containers from that image.  You could also backup the SQL databases from the Docker Container to the local file system.  

But, what if the Business Central Docker Container with your valuable data stops working due to a Windows Update?  And you only realize you need that data after the container stops working.  If the Container can't be started at all, how can you extract the Business Central data?

This solution appears to allow me to copy the SQL mdf and ldf files from the broken container to my local file system, then copy the mdf and ldf files to a new working container to effectively "restore" them.

This may not work for all situations where a BC container has issues, but should work if the container is intact, but just won't start up due to a Docker or Windows issue or error.  

Let me know if there are any issues or caveats with using this method to restore the data from a container.

Software Algorithms to Solve Messy Data Problems

 By Steve Endow

In the software / consulting world, we're sometimes given data that is messy, and we, the software developers, consultants, or report writers, are tasked with making sense of that data and using it in a business process.  Sometimes we have to do "creative" and often unintuitive things to that data to make it usable.

For example, I was once asked to import employee time clock data into a payroll system.  Simple, right?  In the ideal world, an employee clocks in for work in the morning, and clocks out for work in the afternoon.  But in the real world, it's never this easy.

First, the customer's horrible timeclock system did not differentiate between a "clock in" or a "clock out".  I was simply given two fields:  Employee ID and Date Time.  It was up to me to figure out which entries were "clock in" and which entries were "clock out".

Second, sometimes the employees would take breaks or leave for lunch. They would therefore "clock out" when leaving, and "clock in" when returning to work. So an employee could have up to four records for a single shift.

Automated PowerShell Script v2.1 to Recreate My Business Central Docker Containers

 By Steve Endow

UPDATE:  I have posted version 3 of the script here

In July 2020 I posted an earlier version of this script.  This updated version has a few refinements, such as removing and importing BcContainerHelper to ensure the latest version is being used, adding Flush-ContainerHelperCache to remove old helper files, and removing old Docker images.

Automate, Automate, Automate

I setup a "Dev Container" task in Windows Task Scheduler to run this script every morning at 6:45am so that I always have a fresh BC container based on the latest BC artifacts.  I call my main Container "dev17", based on the current 17.x version of Business Central.  Do NOT name your container just "dev"--see my video here on why that will cause problems.

Changing the network location from Public to Private on Windows Server

By Steve Endow

This is just a post for me to store this information for Future Steve, as he will most certainly need it, just as Present Steve has needed it a dozen times over the last year.

Any time I replace my router, replace a piece of Ubiquiti network gear, or reconfigure my network, all of my Windows Server VMs decide they've been kidnapped and change their network location to Public network.

This blocks all traffic on the servers until I can login directly to each server and fix the problem.

Which requires an annoying process using gpedit or PowerShell, which I can never remember after 6 months.

So here is the post with the information to fix the problem:

https://serverfault.com/questions/639088/how-do-i-make-a-connection-private-on-windows-server-2012-r2

Using the GUI:

1. Hit Winkey + R to open Run prompt and type gpedit.msc
2. Navigate to: Computer Configuration/Windows Settings/Security Setting /Network List Manager Policies.
3. Choose your Network name in the right pane.
   Note: To show networks not currently connected, right-click Network List Manager Policies in the left pane and choose Show All Networks.

4. Go to Network Location tab and change the Location type from Public to Private.

Using PowerShell...

One line version:

Set-NetConnectionProfile -InterfaceAlias Ethernet -NetworkCategory Private

Multi-line version:

PS C:\>$Profile = Get-NetConnectionProfile -InterfaceAlias Ethernet1

PS C:\>$Profile.NetworkCategory = "Private"

PS C:\>Set-NetConnectionProfile -InputObject $Profile

Steve Endow is a Microsoft MVP in Los Angeles.  He works with Dynamics 365 Business Central, Microsoft Power Automate, Power Apps, Azure, and .NET.

You can also find him on Twitter and YouTube

Creating a simple text file using AL in Business Central - Sample Code

 By Steve Endow

On January 23, 2021, I recorded a video showing how to create a simple text file using AL in Business Central.

Here is the video:

https://www.youtube.com/watch?v=_GUzlFKJFQk

Below is the sample code from that video.

PowerShell script to remove old Docker Images without deleting the base OS image

 By Steve Endow

If you are creating Business Central Docker Containers and regularly updating the artifacts and images for your containers, you may be familiar with this problem.

When you type "docker images" in PowerShell, you are greeted with a pile of old unused images consuming tons of disk space.

A digital junk drawer

I want to delete the old, unused Docker images.  But I do not want to delete the 10.4 GB "base OS" image that is listed at the very bottom.  As long as my OS version remains the same, that image can be used repeatedly, and if I deleted it, I would have to download it again.

Disable Browser Autofill with Business Central

 By Steve Endow

While using Business Central with Google Chrome, I started to notice strange words appearing in Business Central fields while I entered data in the browser.

Why are you doing this?

In this example, the word "test" was appearing when I clicked on the drop down list for bank accounts in Business Central.  The suggested value was in a text box displayed over the standard Business Central list box.