Introduce Site Config configuration, especially for Pre-Warmed Instances and Always Ready settings (minimumElasticInstanceCount)

[nzthiago]

Description

Customers that want to configure the Always Ready and Pre-Warmed Instances settings of their Premium function apps using this PowerShell module have to currently configure it using the Get-AzResource and Set-AzResource approach as currently documented here.

It would be cleaner for customers to be able to get and set this minimumElasticInstanceCount and PreWarmedInstanceCount site config settings using this Az.Functions module instead. It looks like minimumElasticInstanceCount was introduced as part of the 2020-12-01 rest spec version and is also in the 2022-03-01 version. This Az.Functions module is currently using the 2019-08-01 spec version. So for Always Ready (minimumElasticInstanceCount) and Pre-Warmed Instances (PreWarmedInstanceCount) to work the rest spec version used by this Az.Functions module would need to be updated, with a likely introduction of a breaking change.

Expected something like the following.

Always Ready:

PS> $appconfig = Get-AzFunctionAppConfig -ResourceGroupName <RG name> -Name <function app name>
PS> $appconfig.MinimumElasticInstanceCount = <desired_always_ready_count>
PS> $appconfig | Set-AzFunctionAppConfig -Force

Pre-Warmed Instances:

PS> $appconfig = Get-AzFunctionAppConfig -ResourceGroupName <RG name> -Name <function app name>
PS> $appconfig.PreWarmedInstanceCount = <desired_prewarmed_count>
PS> $appconfig | Set-AzFunctionAppConfig -Force

Or an alternative approach using Get-AzFunctionApp and Set-AzFunctionApp if it makes more sense so not to introduce a new command.

Issue script & Debug output

N/A

Environment data

Name                           Value
----                           -----
PSVersion                      5.1.22000.653
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.22000.653
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Module versions

4.0.3      Az.Functions

Error output

No response

[msftbot[bot]]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @ahmedelnably, @fabiocav.

Issue Details

---

Description

Customers that want to configure the Always Ready and Pre-Warmed Instances settings of their Premium function apps using this PowerShell module have to currently configure it using the Get-AzResource and Set-AzResource approach as currently documented here.

It would be cleaner for customers to be able to get and set this minimumElasticInstanceCount and PreWarmedInstanceCount site config settings using this Az.Functions module instead. It looks like minimumElasticInstanceCount was introduced as part of the 2020-12-01 rest spec version and is also in the 2022-03-01 version. This Az.Functions module is currently using the 2019-08-01 spec version. So for Always Ready (minimumElasticInstanceCount) and Pre-Warmed Instances (PreWarmedInstanceCount) to work the rest spec version used by this Az.Functions module would need to be updated, with a likely introduction of a breaking change.

Expected something like the following.

Always Ready:

PS> $appconfig = Get-AzFunctionAppConfig -ResourceGroupName <RG name> -Name <function app name>
PS> $appconfig.MinimumElasticInstanceCount = <desired_always_ready_count>
PS> $appconfig | Set-AzFunctionAppConfig -Force

Pre-Warmed Instances:

PS> $appconfig = Get-AzFunctionAppConfig -ResourceGroupName <RG name> -Name <function app name>
PS> $appconfig.PreWarmedInstanceCount = <desired_prewarmed_count>
PS> $appconfig | Set-AzFunctionAppConfig -Force

Or an alternative approach using Get-AzFunctionApp and Set-AzFunctionApp if it makes more sense so not to introduce a new command.

Issue script & Debug output

N/A

Environment data

Name                           Value
----                           -----
PSVersion                      5.1.22000.653
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.22000.653
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Module versions

4.0.3      Az.Functions

Error output

No response

Author:	nzthiago
Assignees:	Francisco-Gamino
Labels:	Service Attention, Functions, bug
Milestone:	-

[Francisco-Gamino]

The next breaking change release will take place in May 2023 if we decide to fix this issue.

[Francisco-Gamino]

Hello @panchagnula / @StrawnSC -- Do you plan to support this in the Az CLI?

[nicolashemery]

Hello,

If it help, i would like to have this functionallity in the next planned version as well.

Thanks.