How to restart Azure app service instances sequentially "without using deployment slots" and with no downtime ?

Ramya Pambi 0

I have tried to restart individual instances sequentially (Using bash ) with delay between each instance restart but I still see the downtime .I am not using deployment slots -Is there a way to achieve zero downtime without deployment slots .

hossein jalilian 9,930 Reputation points

2025-01-23T17:20:18.27+00:00
Thanks for posting your question in the Microsoft Q&A forum.

You can minimize downtime by following these steps:

Ensure multiple instances: Scale your App Service plan to have at least two instances running

Use the Advanced Application Restart feature

Implement a rolling restart, use Azure REST APIs or PowerShell commands to automate this process

Enable the Auto-Healing feature to automatically restart instances that meet certain conditions

Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful
Ramya Pambi 0 Reputation points

2025-01-23T18:00:43.3066667+00:00

@hossein jalilian Thanks for sharing the suggestions . I already have 2 instances running . I have used bash script to do rolling restart but it still experiencing some downtime . Does rolling restart have zero downtime or still have minimal downtime ? I am looking for options to have zero downtime .
Hanihassan-9959 0 Reputation points

2025-01-23T18:23:39.0266667+00:00

Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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Laxman Reddy Revuri 2,390 Reputation points Microsoft Vendor

2025-01-28T09:41:14.76+00:00

Hi @ Ramya Pambi
Following up to see if you have chance to check my previous response and help us with requested information to check and assist you further on this.

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Laxman Reddy Revuri 2,390 Reputation points Microsoft Vendor

2025-01-27T03:24:54.0233333+00:00

Hi @Ramya pambi
Rolling restarts minimize downtime by restarting instances one at a time, but they don't guarantee zero downtime. Brief delays or issues may occur during restarts. To achieve zero downtime, consider strategies like using Azure’s App Initialization for app warm-up, configuring load balancers to reroute traffic, setting up health probes to ensure traffic only hits healthy instances, and automating checks before restarting instances. Additionally, use monitoring tools like Azure Application Insights to identify and address issues during restarts.
references: https://learn.microsoft.com/en-us/azure/app-service/routine-maintenance-downtime#strategies-for-increased-uptime
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Laxman Reddy Revuri 2,390 Reputation points Microsoft Vendor

2025-01-29T03:56:43.13+00:00

Hi @ Ramya Pambi
Following up to see if you have chance to check my previous response and help us with requested information to check and assist you further on this.
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How to restart Azure app service instances sequentially "without using deployment slots" and with no downtime ?

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