Implement IaaS, App Service Apps Flashcards
What is Azure App Service
Azure App Service is an HTTP-based service for hosting web applications, REST APIs, and mobile back ends. This is PaaS
Which languages are supported by Azure App Service
You can develop in your favorite language, be it .NET, .NET Core, Java, Ruby, Node.js, PHP, or Python.
True or False? Azure App Service Applications can scale on Linux and Windows Environemnts
True
How to Enable application logging on Windows
In Azure Portal, select the App Service and select App Service logs. Select on for Application Logging (Filesystem) or Application Logging (Blob)
What is the difference between Application Logging (Filesystem) and Application Logging (Blob) and what is the usage scope for each
The Filesystem option is for temporary debugging purposes, and turns itself off in 12 hours. The Blob option is for long-term logging, and needs a blob storage container to write logs to.
In General, how to enable Logs for App Services
In Portal, Select the App and scroll down to Monitoring Sections, Find Logs and App Service Logs
https://docs.microsoft.com/en-us/azure/app-service/troubleshoot-diagnostic-logs?WT.mc_id=thomasmaurer-blog-thmaure
What types of Web apps can save logs to Azure Blob storage?
- Node.js apps on Windows.
- Node.js apps on Linux.
- ASP.NET Core apps on Linux.
Node.js apps on Windows.
Any app that runs on Windows can save logs to Blob storage.
Why is file system logging automatically turned off after 12 hours?
- To optimize app performance.
- So that storage space can be reused.
- To enable Web apps to reinstantiate on different server instances, with different file system storage.
To optimize app performance.
Excessive logging can potentially cause app performance to degrade
True Or False? Only Windows Apps can write logs to Azure Blob Storage
True
What is the general syntax for Azure CLI regarding App Service Logging
‘az webapp log config’ and
az webapp log show
Methods for retrieving log files?
Download via Azure CLI, Kudu or Azure Storage Explorer
Supported Formats for Azure App Service Deployment
WAR or ZIP File
Whats the limit for Azure App Service File Deployment (Size)
2 GB / 2048 MB
All valid Deployment Methods for App Services?
- ZIP or War File Deploy
- REST with a POST Message
Where do offical deployment methods store there data?
/home/site/wwwroot
What Is Azure Pipelines?
CI & CD, Build Server
What is a YAML file
A yaml file contains instructions for Azure Pipelines. Syntax is more like docker syntax
What is a typical file name for YAML file?
azure-pipelines.yaml
True or False? Web App Deploy Task can be used to deploy a Azure Web App after Build through yaml
True
What do all build-in Azure Tasks require for Azure Pipelines?
An Azure Service Connection
What is a Azure Web App Deploy task
Something used in Azure Pipelines to deploy a Web App after build
What kind of microservices does Azure App Services Provide
Web Apps, Mobile Back Ends and API apps
What is azuredeploy.json used for and how to get it?
Its a ARM (Azure Resource Manager) Template file that defines how to dpeloy resources. Used in Microservices tutorial
What are Deployment Slots in Azure App Services
A Slot where a instance of the app is running. For example good for staging and life environment.
True or false: Azure App service can automatically scale your web application to meet traffic demand?
True
Which of the following is not a valid automated deployment source?
GitHub
Azure DevOps
SharePoint
Dropbox
Sharepoint
True or False? Its possible to deploy a web app to azure app services by using an container image from Container Registry
True
True or False? In DevOps, repeatability and predictability are keys to any successful deployment of a high-scale application composed of microservices
True
How to configure Web Apps?
There is a section in the portal for Application settings and Connection Strings.
True or False? Web Apps Settings are provided as ENVIRONMENT VARIABLES
True
How to replace connection strings when deployed to Azure
web.config connection strings will be replaced by name when provided in Azure Portal
True Or False? App Service Domains are Free of charge
False
What is a requirement for app service domains?
Its not available in the free pricing tier
For what is the “Custom Domains” Button in the Settings Section of App Service
It is to buy custom domains for an Azure App Service.
True or False? Azure App Service Custom Domains are automatically secured by SSL
False. You must configure SSL Bindings / Certificates
True or False? Azure App Service can have multiple Host names provided by custom domains.
True
How long is a Azure Custom Domain purchase valid (Renew time) ?
1 year
How many workflows are available to scale Azure App Services and what is its Name
There are two workflows for scaling, scale up and scale out
Describe what Scale Up means in Context of Azure App Services (Also called vertical scale up/down)
Add more resources to a single Node.
Get more CPU, memory, disk space, and extra features like dedicated virtual machines (VMs), custom domains and certificates, staging slots, autoscaling, and more.
How to Scale Up in Context of Azure App Services
You scale up by changing the pricing tier of the App Service plan that your app belongs to.
True or False: Other Resources your App Service depends on (Like a SQL DB) are scaled up as well when you change the Pricing Tier
False, you must scale up these resources separately.
Describe what Scale out means in context of Azure App Services (Also called horizontal scale)
Adding more nodes to a (distributed) system.
Increase the number of VM instances that run your app. You can scale out to as many as 30 instances, depending on your pricing tier. App Service Environments in Isolated tier further increases your scale-out count to 100 instances
True or False? The Maximum Instance Count for Scale Out is 30 when pricing plan is “lower” then Isolated (In Context of Azure App Service)
True
What is the Scale Instance Count for Azure App Service when pricing Plan is at least isolated?
> = 100
True or False? Azure App Services supports only manual Scaling out
False, Auto Scale based on autoscale rules is possible.
How does Auto Scaling work for Azure App Service, how does a rule get applied
If choosen Scale based on Metric, you must specific the Criteria when the rule applies. For Example a % threshold of CPU is reached or memory limit reached.
True or False? It is possible to see the scale history in Azure Portal
True, for 90 days back in time
True or False? It is possible to see json definition for scale definition
True
