NavContainerHelper – Authentication


If you haven't read the first post about the NavContainerHelper, you should do so.

Specify username and password for your NAV SUPER user

The parameter needed to specify username and password for your NAV Super user is

-credential $credential

The credentials are of type System.Management.Automation.PSCredential and can be created like this

$securePassword = ConvertTo-SecureString -String "P@ssword1" -AsPlainText -Force
$credential = New-Object System.Management.Automation.PSCredential -argumentList "admin", $securePassword

or, if you want to ask the user to enter the credentials in a dialog

$credential = get-credential

The Nav-ContainerHelper transfers the password to the container as an encrypted string and the key to decrypt the password is shared in a file and deleted afterwards. This allows you to use Windows Authentication with your domain credentials in a secure way.

Example:

if ($credential -eq $null -or $credential -eq [System.Management.Automation.PSCredential]::Empty) {
    $credential = get-credential -UserName "admin" -Message "Enter NAV Super User Credentials"
}
New-NavContainer -accept_eula `
                 -containerName "test" `
                 -auth NavUserPassword `
                 -imageName "microsoft/dynamics-nav" `
                 -Credential $credential

Note, if you use docker run to run your container, you will transfer credentials in clear text to the container and can be retrieved by a simple docker inspect on the host. If you want to transfer the password securely, you need to encrypt the password and transfer a file containing the encryption key to the container using the two environment variables securepassword, passwordkeyfile and removepasswordkeyfile, this is what the NavContainerHelper is doing.

Setup Windows Authentication with the Windows User on the host computer

The parameter used to specify that you want to use Windows Authentication is

-auth Windows

Which also is the default if you do not specify -auth. A container doesn't have its own Active Directory and cannot be joined into an AD, but you can still setup Windows Authentication by sharing your domain credentials to the container.

Example:

New-NavContainer -accept_eula `
                 -containerName "test" `
                 -auth Windows `
                 -imageName "microsoft/dynamics-nav" `
                 -Credential $credential

Note, if the host computer cannot access the domain controller, Windows authentication might not work properly.

Enjoy

Freddy Kristiansen
Technical Evangelist

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