I deployed a nodejs web app on azure as an
App Service
How do i see the console.log from my application?
You can tail the log with the Azure CLI...
$ az webapp log tail --name <name of webapp> --resource-group <name of resource group>
More info here
I just followed Enable diagnostics logging to enable Application Logging (Filesystem), Application Logging (Blob) and found console.log and console.error would output logs under D:\home\LogFiles\Application\, you could use KUDU to view your log files or you could also access https://{your-app-name}.scm.azurewebsites.net/api/vfs/LogFiles/Application/index.html and check the stdout and stderr type as follows:
Moreover, as Azure Web App (Website) Logging - Tips and Tools mentioned about application logs for node.js as follows:
Setting application logs in the Azure portal
For node.js websites the way to write application logs is by writing to the console using console.log('message') and console.error('message') which goes to Information/Error level log entries. Currently the only supported target for the log files for node.js is the file system.
Other web site types like php and python are not supported for the application logs feature.
For logging into blob, you may leverage winston-azure-blob-transport for collecting the application logs from your Node.js web app into Azure Blob Storage.
You can open a Log Stream using the azure portal.
Related
I have a tomcat Docker image -- source
This image has a sample war file that logs some data in a tomcat folder -- in the instance of this image in tomcat/logs
I am deploying this image as a web app using Azure containers -- and that works great, but I was wondering if there was a way to access that tomcat/logs folder?
I can FTP to the web app but I cannot access to the files in the Docker container.
Is there a way to do it?
You first need to enable them. To enable application logging for Linux apps or custom containers in the Azure portal, navigate to your app and select App Service logs. In Application logging, select File System > In Quota (MB), specify the disk quota for the application logs > In Retention Period (Days), set the number of days the logs should be retained > When finished, select Save.
Then you can see container logs in your App Service > Monitoring > Log stream
You can use Kudu to view the logs -Linux/container apps:
https://.scm.azurewebsites.net/api/logs/docker
You may also leverage App Service diagnostics.
To access App Service diagnostics, 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” and “Availability and Performance” > "Application Logs" title.
I have deployed a web application on Azure Kubernetes Service (AKS). I want to generate Application logs of deployed web application of cluster like Log folder. I want to access those logs from LOG folder through browser or any other solution which I can easily share with developers to access logs from their system as well.
You can use the logging options, cloud-native solutions like fluentD and you can push the logs from LOG folder to Elasticsearch or Azure logging solution and you can watch the logs into dashboard.
Fluentd : https://www.fluentd.org/
Check out more at : https://logz.io/blog/kubernetes-log-analysis/
We are using spring boot app deployed in azure app service , App is using Logback by default and logging in console. Even though i have configured the storageV2 account to retreive the logs in blob storage , enabled to store logs in filesystem still i am not able to see the logs at any place. Is there any further configuration needed to be added in java app to get the logs ? Though i am getting web server related logs (url getting hit) but
app logs are not showing up.
We are developing an application based on Azure webapps and are having troubles understanding how to get basic logs from them. There seems to be at least 3 different ways to get some logs:
I can access Kudu (?) logs using URL https://my-webapp.scm.azurewebsites.net/
I should be able to access the same (?) logs using az webapp log but when I use show command it says no logs are activated
I can also access some logs using the Diagnose and Solve Problems menu in the Azure UI but that's cumbersome
What I would like is very simply to be able to do a tail on logs on a running webapp and get all logs that are generated by it, whether it be HTTP request logs from the hosting HTTP server, system logs or applicative level logs.
Can someone point me at the right documents explaining what's the correct way to do that?
To diagnose issues is to look at trace files. Kudu service as well as its application write traces to the /Logfiles folder. You may refer to below link on this:
https://github.com/projectkudu/kudu/wiki/Diagnostic-Log-Stream
https://github.com/projectkudu/kudu/wiki/Kudu-console
Also, you need turn on the diagnostics logs from the Azure Portal or from Azure PowerShell (using the Set-AzureWebsite cmdlet).
If using Azure CLI to filter specific log types, such as HTTP, use the --Path parameter.
az webapp log tail --name appname --resource-group myResourceGroup --path http
Reference: Enable diagnostics logging for apps in Azure App Service
I'm using Azure Webapp (Windows) to host a nodejs app. Inside my app, I'm using bunyan as my logger library.
I have configured App logging to Azure Storage Blog through the web portal. I selected the storage accounts, blob container, etc.
If I go to Log Stream, I do see the logs from my app in the portal. However, those logs are not being stored in the selected Blob container. There's a folder (inside the container) that was created by the app service and it does log things like when a new version of my app is deployed using a CSV file but that's all.
I've read my posts indicating that Nodejs is not supported for this environment (logging to blob storage). Is this true? Am I missing something?
For node.js websites the way to write application logs is by writing to the console using console.log('message') and console.error('message') which goes to Information/Error level log entries. Currently only supported target for the nodejs log files is the file system.
It looks as though you can't use blob storage for application logs in Azure Web Apps. However Azure blob storage adapters for popular nodejs loggers such as winston: winston-azure-blob-transport.