Is depends_on supported by docker-compose in Web Apps for Containers?

[townxelliot]

The article

https://docs.microsoft.com/bs-latn-ba/azure/app-service/containers/tutorial-multi-container-app

gives an example which shows depends_on being used in a docker-compose.yml file for creating a multi-container app.

However, there is a page linked to this one:

https://docs.microsoft.com/bs-latn-ba/azure/app-service/containers/configure-custom-container

with a section about supported docker-compose options (https://docs.microsoft.com/bs-latn-ba/azure/app-service/containers/configure-custom-container#docker-compose-options).

This list shows that the depends_on option is ignored.

If this is the case, the examples which use depends_on to link containers are presumably invalid.

Could you please confirm whether depends_on is expected to work (my experience is that it does not)? If it does not, could you please explain how to create connections between containers in a multi-container app without using depends_on?

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Document Details

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• ID: b2472d79-baad-f202-75dc-c0d7c08e5c49
• Version Independent ID: 7816cf1e-2264-e365-4d5c-b1fc9f7d08fe
• Content: Create multi-container app in Web App for Containers - Azure App Service
• Content Source: articles/app-service/containers/tutorial-multi-container-app.md
• Service: app-service
• GitHub Login: @msangapu
• Microsoft Alias: msangapu

[BryanTrach-MSFT]

@townxelliot Thanks for the feedback! We are currently investigating and will update you shortly.

[BryanTrach-MSFT]

@townxelliot We have also been unable to successfully use the depends_on feature with our docker image, which conflicts with the doc. As a result, we have assigned the feedback to the author to review this doc and make any changes as necessary. Thank you for raising this up.

[msangapu-msft]

Hi @townxelliot. Thank you for the feedback. As mentioned in the article, the Docker Compose sample was taken from https://docs.docker.com/compose/wordpress/#define-the-project . The sample includes "depends_on" and we didn't remove it because depends_on is ignored and has no effect on the configuration. I will update the article to call this out so it's not misleading. Thanks for pointing this out.

In terms of connections between containers, if you're asking how does a container know the other is online - you should include a retry mechanism to dependent services when the connection is dropped.

[msangapu-msft]

Hi @townxelliot, the article actually had an area for Supported Configuration options. I moved it above the Docker sample to help with visibility. The change will be live tomorrow morning. Thanks again for your feedback.

#please-close