Edit the host.json in my Azure Standard Logic App

Question

I'm working with a Standard logic app in Azure and need to adjust the Runtime.Backend.VariableOperation.MaximumVariableSize setting in the host.json file. I attempted to edit the file using Visual Studio Code (via Azure Tools extension), but the file appears to be read-only and won't allow changes.

Has anyone encountered this issue? Is there a specific method or workaround to modify the host.json settings for a Standard logic app? Any guidance on how to enable write access or how to properly deploy a custom host.json configuration would be greatly appreciated.

Where was the original development of the workflows undertaken? In the portal or in VS Code? — Skin
– Skin, Commented Feb 24 at 21:05
@InvalidSyntax, you have to save the file to edit in visual studio code. — Pravallika KV
– Pravallika KV, Commented Feb 25 at 7:59

Pravallika KV · Accepted Answer · 2025-02-25 10:03:16Z

2

Azure Logic App Standard doesn't allow direct modification of certain files via the Azure Tools extension in Visual Studio code.

I have tried to edit the host.json file of the logic apps workflow (which was created in Portal) in Visual studio code and faced the same issue.

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To resolve this, you have to save the file you want to edit.

Open Visual Studio code, click on File=>Save or Ctrl+S and save the file.

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Now, you will be able to edit the host.json file.

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You can edit host.json in Portal directly.

Follow below Steps:

Navigate to Development Tools=>Advanced Tools=>Go in Logic Apps.
It will open the Kudu site of logic app.
Click on Debug Console=> select CMD.

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Go to Site/wwwroot =>host.json.
Click on edit icon near host.json and you will be able to edit the file.

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edited Feb 25 at 10:03

answered Feb 25 at 9:04

Pravallika KV

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InvalidSyntax Feb 25 at 9:34

But once you save it locally, how do you then deploy it back to the Azure Logic App?

Pravallika KV Feb 25 at 9:39

You can directly edit host.json in portal instead of editing the file in visual studio code and deploy it to Azure.

InvalidSyntax Feb 25 at 9:48

Can you clarify where this can be found? I've been unable to locate it.

Pravallika KV Feb 25 at 9:50

Navigate to Advanced tools=>Go(KUDU site) in Logic Apps, open Debug Console=>CMD=>site/wwwroot click on the edit icon at host.json file and you will be able to edit the file. Image1

Pravallika KV Feb 25 at 10:03

Check the updated answer @InvalidSyntax.

Esther Fan - MSFT · Accepted Answer · 2025-02-27 20:33:43Z

0

You can find the steps to edit the host settings in the host.json file using the Azure portal in the following product documentation:

Edit host and app settings for Standard logic apps

answered Feb 27 at 20:33

Esther Fan - MSFT

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