can't able to connncet to mongodb when deploying web app for containers through docker-compose

Question

can't able to connncet to mongodb when deploying web app for containers through docker-compose

BALIVADA Durga P 1

Hi when m trying to deploy our code as a containers using docker-compose in web app for containers i can't able to connect to mongodb database throwig an error as mongoose disconneted

But when using the same docker-compose in my local machine i can able to connect to mongodb and able to deploy the app here is how my compose file looks like

version: "3.7"
services:
server:
image: "devops.azurecr.io/configuration_server"
environment:
- NODE_ENV=development
- MONGO_URL=mongodb://mongo:27017/configuration
- RUNNING_IN_DOCKER=true
depends_on:
- mongo
ports:
- "5000:5000"
client:
image: "devops.azurecr.io/configuration_client"
environment:
- NODE_ENV=development
- RUNNING_IN_DOCKER=true

ports:  
  - &#34;3000:3000&#34;  
depends_on:  
  - server

mongo:
image: "xaltdevops.azurecr.io/mongo"

hostname: mongodb

environment:  
  - MONGO_URL=mongodb://mongo:27017/onfiguration             
ports:  
  - 27017:27017  
volumes:  
  - mongodev:/data/mongoaz/

please suggest me on this

ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-09T14:17:59.25+00:00

@BALIVADA Durga P , Apologies for the delay! Thanks for posting this good question.

Ports other than 80 and 8080 (ignored) and also 'depends_on' is unsupported Docker Compose configuration on App Service.

You may review the step-step instructions on connecting to MongoDB here.

Since depends_on not supported-It is recommend that to handle the dependencies by performing the check in your application code, both at startup and whenever a connection is lost for any reason. You could design the app to attempt to re-establish a connection to the database after a failure.
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-09T14:24:34.39+00:00

@BALIVADA Durga P , Adding more:

You may inspect the Application logging (/home/LogFiles folder) and log files from the browser at https://<yourwebpp-name>.scm.azurewebsites.net/api/logs/docker and examine the log stream for any error messages.

Also, leverage App Service diagnostics from Azure Portal> Navigate to your App Service app in the Azure portal. In the left navigation, click on Diagnose and solve problems – Checkout the tile for “Diagnostic Tools” > “Availability and Performance” & "Best Practices".

How does Multi-container Web App Determine Which Container is the "Web Container"?

How does Multi-container Web App handle container dependencies?
BALIVADA Durga P 1 Reputation point

2020-11-09T14:44:03.17+00:00

Hi ajkuma,

Well, Thanks for your response, our intention is to deploy the code as a docker containers either as a web app or as a azure containers instances if there is no capability to expose other than 80 and 8080 ports is there any other way to deploy using the above docker compose file.
If depends_on doesn't work then how to link two services in docker-compose.

Even I tried with links parameter in compose file it doesn't work for me.

If there isn't any alternative can you please help me how to link the service container with azure cosmo db ?

so that I will create a cosmodb account with mongo api

Thnaks in advance....
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-10T20:01:51.487+00:00

@BALIVADA Durga P , Thanks for the follow-up and sharing additional details.

The best practice guide for depends_on control is outlined here.
You could host this compose project on AKS or Azure VM as an alternative.

As a side note, Linux apps in App Service run in their own containers, so no access to the host OS is allowed.

I'm trying to better understand the service container with Cosmos DB requirement/connection issues. I'll connect with you offline.
BALIVADA Durga P 1 Reputation point

2020-11-11T13:20:00.68+00:00

Hi ajkumar,

Thanks for your response, I have done some changes in our docker compose file and created a azure cosmo db and we can able to connect to mongo databse now and containers are running fine but I can't able to browse the below website

https://ac-xaltconfiguration.azurewebsites.net/

I didn't see any errors in the logs and we have opened ports 80 and 443.

do we need to add any app settings for that to browse the website

The docker-compose file we can able to connect to mongo and browse the websites In localhosts
Please help us...
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-11T22:12:36.683+00:00

@BALIVADA Durga P , Thanks for additional details. Apologies you're still experience this issue.

I notice that you're running the WebApp on a Free App Service Plan (ASP), kindly scale-up to higher plan - Basic, Standard or Premium and then test. You can scale-down/switch to any tier based on your requirement.

Web Sockets are not currently supported for Linux apps on Free App Service Plans -https://learn.microsoft.com/azure/app-service/faq-app-service-linux#web-sockets

If the issue still persist, kindly reach out to me as mentioned in the private/offline post.
BALIVADA Durga P 1 Reputation point

2020-11-12T06:33:47.563+00:00

Hi Ajkumar,

Yes I have upgraded to the production plan but still I see no difference btw I dropped you a mail for offline support please revert me to the mail
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-12T12:28:13.547+00:00

@BALIVADA Durga P , We have received your email and I have followed-up with you with the configuration and the next details.

1 answer

Your answer

ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-09T14:17:59.25+00:00

@BALIVADA Durga P , Apologies for the delay! Thanks for posting this good question.

Ports other than 80 and 8080 (ignored) and also 'depends_on' is unsupported Docker Compose configuration on App Service.

You may review the step-step instructions on connecting to MongoDB here.

Since depends_on not supported-It is recommend that to handle the dependencies by performing the check in your application code, both at startup and whenever a connection is lost for any reason. You could design the app to attempt to re-establish a connection to the database after a failure.
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-09T14:24:34.39+00:00

@BALIVADA Durga P , Adding more:

You may inspect the Application logging (/home/LogFiles folder) and log files from the browser at https://<yourwebpp-name>.scm.azurewebsites.net/api/logs/docker and examine the log stream for any error messages.

Also, leverage App Service diagnostics from Azure Portal> Navigate to your App Service app in the Azure portal. In the left navigation, click on Diagnose and solve problems – Checkout the tile for “Diagnostic Tools” > “Availability and Performance” & "Best Practices".

How does Multi-container Web App Determine Which Container is the "Web Container"?

How does Multi-container Web App handle container dependencies?
BALIVADA Durga P 1 Reputation point

2020-11-09T14:44:03.17+00:00

Hi ajkuma,

Well, Thanks for your response, our intention is to deploy the code as a docker containers either as a web app or as a azure containers instances if there is no capability to expose other than 80 and 8080 ports is there any other way to deploy using the above docker compose file.
If depends_on doesn't work then how to link two services in docker-compose.

Even I tried with links parameter in compose file it doesn't work for me.

If there isn't any alternative can you please help me how to link the service container with azure cosmo db ?

so that I will create a cosmodb account with mongo api

Thnaks in advance....
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-10T20:01:51.487+00:00

@BALIVADA Durga P , Thanks for the follow-up and sharing additional details.

The best practice guide for depends_on control is outlined here.
You could host this compose project on AKS or Azure VM as an alternative.

As a side note, Linux apps in App Service run in their own containers, so no access to the host OS is allowed.

I'm trying to better understand the service container with Cosmos DB requirement/connection issues. I'll connect with you offline.
BALIVADA Durga P 1 Reputation point

2020-11-11T13:20:00.68+00:00

Hi ajkumar,

Thanks for your response, I have done some changes in our docker compose file and created a azure cosmo db and we can able to connect to mongo databse now and containers are running fine but I can't able to browse the below website

https://ac-xaltconfiguration.azurewebsites.net/

I didn't see any errors in the logs and we have opened ports 80 and 443.

do we need to add any app settings for that to browse the website

The docker-compose file we can able to connect to mongo and browse the websites In localhosts
Please help us...
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-11T22:12:36.683+00:00

@BALIVADA Durga P , Thanks for additional details. Apologies you're still experience this issue.

I notice that you're running the WebApp on a Free App Service Plan (ASP), kindly scale-up to higher plan - Basic, Standard or Premium and then test. You can scale-down/switch to any tier based on your requirement.

Web Sockets are not currently supported for Linux apps on Free App Service Plans -https://learn.microsoft.com/azure/app-service/faq-app-service-linux#web-sockets

If the issue still persist, kindly reach out to me as mentioned in the private/offline post.
BALIVADA Durga P 1 Reputation point

2020-11-12T06:33:47.563+00:00

Hi Ajkumar,

Yes I have upgraded to the production plan but still I see no difference btw I dropped you a mail for offline support please revert me to the mail
ajkuma 28,036 Reputation points Microsoft Employee Moderator

2020-11-12T12:28:13.547+00:00

@BALIVADA Durga P , We have received your email and I have followed-up with you with the configuration and the next details.

Answer 1

To benefit the community: Posting the solution that worked.

There were 'Too Many redirects'- Application was redirecting infinitely. HTTPS redirection should not be handled at application level when running on Azure App Service. Azure App Service terminates all the HTTPS requests at Load Balancer level and further communication from Load Balancer to Instance is over HTTP (inside secure Azure Network ).

We removed redirection from App level and Web app started successfully.

Reference document: Process to bind custom domain to App Service and configure SSL certs.
Custom Domain and SSL Cert

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can't able to connncet to mongodb when deploying web app for containers through docker-compose

hostname: mongodb

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