Azure Web Slots
2021年4月8日Register here: http://gg.gg/oyov6
In this article, we will see –
*Azure Function Deployment Slot
*Azure Slot Machines
*Azure Web Slots Online
Azure Deployment Slots is a feature that allows Web Apps, API Apps and Function Apps to run different instances of their application at the same time (known as slots). Slots are exposed via a publicly available endpoint. Every Azure Website (recently renamed App Service) comes with a default deployment slot – production. Did you know that you can create up to 4 additional deployment slots to be used for dev, test, QA, or staging? Deployment slots are actually live web apps with their own hostnames.
*how to deploy Azure WebApp,
*add deployment slot,
*code push to Production and Staging slots
*finally, swap the slots
Design and Architecture of Azure Web App Deployment slots is given on the link below –Deploy Azure WebApp
I currently have a web application deployed to Azure on the App Service free plan and, as part of going live, I’m interested in moving to the use of slots. This is primarily because it gives me the ability to deploy new code into staging and then seamlessly swap over once it’s been validated.
*Login to Azure Portal – https://portal.azure.com
*Deploy Azure WebApp using the New menu
*Click on Azure WebApp once it is created, click on “Deployment slots” and then click on “Add Slot”
*I have slot as “Staging”, and I have chosen not to clone configuration from Production slot. This is being done because we will be deploying different version of the app into both slots.Summary –
Production URL – http://sarveshgoel.azurewebsites.net
Staging Slot URL – http://sarveshgoel-staging.azurewebsite.netPush code to Production and Staging deployment slots
*Launch VSTS and open sample web code. I have update the heading on the page to show – Production text. This will be published to the Production slot. Right click on the solution and click on Publish
*Select new profile, select Azure App Service. Choose Select Existing since we will be deploying to existing Azure WebApp
*Select the Primary slot – sarveshgoel and the code will be pushed there. We will run similar steps for Staging slot.
*Now click on Publish, and wait for the confirmation.
*Now browse the URL – http://sarveshgoel.azurewebsites.net and you would see the changes that we did initiallyDeploy to Staging Slot now
Now repeat the process for Staging Slot but remember to modify the content of Web page, for example – I would change Production to Staging. Another change will from the steps above to deploy to Staging slotSwap the Azure WebApp Deployment slot now
Now we have two versions of Web Application running on separate slots, running on their own Web URLs. As explained in the Design and Architecture documentation, purpose of staging slot is to test the code before making it Production.
Please remember, the slots in Production WebApp should be used for Staging environment but not for QA or testing environments.
Now, click on deployment slots on the Azure Portal, click on Swap . Now swap Production with Staging as shown below.
Once you click on Ok, Production becomes Staging and Staging becomes Production within few seconds.
Look at the URLs above, and try using this amazing feature Azure WebApp deployment slot.
When you make use of Azure App Services you can deploy to different deployment slots. You can choose to work with three deployment slots (dev, tst, acc) and use the default one as production, but what can you do best regarding this functionality.Deployment slots
Deployment slots are live web apps with their own hostnames. Web app content and configurations elements can be swapped between two deployment slots, including the production slot. Deploying your application to a deployment slot has the following benefits:
*You can validate web app changes in a deployment slot before swapping it with the another slot.
*Eliminate downtime on deployment, and automate the swapping.
*Easy to swap a bad deployment back.
Note:”The app (App Service Plan) must be running in the Standard or Premium mode in order for you to enable multiple deployment slots. Everything described in this article is for Azure App Services and then specific Azure Web Apps, Azure API Apps and Azure Mobile Apps.”Practice
Deployment slots can be deployed/ created easy by making use of the Azure Portal or Azure Resource Templates. Information on deploying Azure Deployment Slots via Azure Resource Templates can be found on a blog post I wrote a few weeks ago:
*Azure Resource Templates and Deployment Slots
Within the Azure Portal (https://portal.azure.com) you need to take the following steps:
*In the Azure Portal, open the blade of your Azure App Service.
*Click Settings, and then click Deployment slots.
*In the “deployment slots” blade click on Add Slot.
*In the “Add a slot” blade, give the slot a name, and select whether to clone web app configuration from another existing deployment slot.Azure Function Deployment Slot
Before creating deployment slots you need to have a useful pattern. In my opinion it is best to use a deployment slot as a pre production environment. This will lead to the following solution architecture.
This solution architecture makes sure that the development/ test / acceptation environment is completely separated from production. Via the pre production deployment slot you are able to test your application against the production SQL database. With this setup you can’t alter any data in pre-production this is why there is a dotted line between the pre production web app and the test / acceptation database. That you could use to test all your CRUD operations. Besides this is also makes sure that the pre production is as close to production as needed for a clear test results.Considerations
When making use of deployment slots there are a considerations and disadvantages to be aware of:
*The web application and deployment slots are created within the same environment (This is also the case when you create a Azure Web App within the same App Service Plan). This means resources between the two instances are shared, So if you want to do a stress test on pre-production you are certain that it will effect the performance of the production instance.
Besides the above disadvantage also consider the settings that can and can’t be swapped:
Swapped:
*General settings – such as framework version, 32/64-bit, Web sockets.
*App settings (you can configure it to stick to a slot).
*Connection strings (you can configure it to stick to a slot).
*Handler mappings.
*Monitoring and diagnostic settings.
*WebJobs content.Azure Slot Machines
Not swapped:Azure Web Slots Online
*Publishing endpoints.
*Custom Domain Names.
*SSL certificates and bindings.
*Scale settings.
*WebJobs schedulers.
Register here: http://gg.gg/oyov6
https://diarynote-jp.indered.space
In this article, we will see –
*Azure Function Deployment Slot
*Azure Slot Machines
*Azure Web Slots Online
Azure Deployment Slots is a feature that allows Web Apps, API Apps and Function Apps to run different instances of their application at the same time (known as slots). Slots are exposed via a publicly available endpoint. Every Azure Website (recently renamed App Service) comes with a default deployment slot – production. Did you know that you can create up to 4 additional deployment slots to be used for dev, test, QA, or staging? Deployment slots are actually live web apps with their own hostnames.
*how to deploy Azure WebApp,
*add deployment slot,
*code push to Production and Staging slots
*finally, swap the slots
Design and Architecture of Azure Web App Deployment slots is given on the link below –Deploy Azure WebApp
I currently have a web application deployed to Azure on the App Service free plan and, as part of going live, I’m interested in moving to the use of slots. This is primarily because it gives me the ability to deploy new code into staging and then seamlessly swap over once it’s been validated.
*Login to Azure Portal – https://portal.azure.com
*Deploy Azure WebApp using the New menu
*Click on Azure WebApp once it is created, click on “Deployment slots” and then click on “Add Slot”
*I have slot as “Staging”, and I have chosen not to clone configuration from Production slot. This is being done because we will be deploying different version of the app into both slots.Summary –
Production URL – http://sarveshgoel.azurewebsites.net
Staging Slot URL – http://sarveshgoel-staging.azurewebsite.netPush code to Production and Staging deployment slots
*Launch VSTS and open sample web code. I have update the heading on the page to show – Production text. This will be published to the Production slot. Right click on the solution and click on Publish
*Select new profile, select Azure App Service. Choose Select Existing since we will be deploying to existing Azure WebApp
*Select the Primary slot – sarveshgoel and the code will be pushed there. We will run similar steps for Staging slot.
*Now click on Publish, and wait for the confirmation.
*Now browse the URL – http://sarveshgoel.azurewebsites.net and you would see the changes that we did initiallyDeploy to Staging Slot now
Now repeat the process for Staging Slot but remember to modify the content of Web page, for example – I would change Production to Staging. Another change will from the steps above to deploy to Staging slotSwap the Azure WebApp Deployment slot now
Now we have two versions of Web Application running on separate slots, running on their own Web URLs. As explained in the Design and Architecture documentation, purpose of staging slot is to test the code before making it Production.
Please remember, the slots in Production WebApp should be used for Staging environment but not for QA or testing environments.
Now, click on deployment slots on the Azure Portal, click on Swap . Now swap Production with Staging as shown below.
Once you click on Ok, Production becomes Staging and Staging becomes Production within few seconds.
Look at the URLs above, and try using this amazing feature Azure WebApp deployment slot.
When you make use of Azure App Services you can deploy to different deployment slots. You can choose to work with three deployment slots (dev, tst, acc) and use the default one as production, but what can you do best regarding this functionality.Deployment slots
Deployment slots are live web apps with their own hostnames. Web app content and configurations elements can be swapped between two deployment slots, including the production slot. Deploying your application to a deployment slot has the following benefits:
*You can validate web app changes in a deployment slot before swapping it with the another slot.
*Eliminate downtime on deployment, and automate the swapping.
*Easy to swap a bad deployment back.
Note:”The app (App Service Plan) must be running in the Standard or Premium mode in order for you to enable multiple deployment slots. Everything described in this article is for Azure App Services and then specific Azure Web Apps, Azure API Apps and Azure Mobile Apps.”Practice
Deployment slots can be deployed/ created easy by making use of the Azure Portal or Azure Resource Templates. Information on deploying Azure Deployment Slots via Azure Resource Templates can be found on a blog post I wrote a few weeks ago:
*Azure Resource Templates and Deployment Slots
Within the Azure Portal (https://portal.azure.com) you need to take the following steps:
*In the Azure Portal, open the blade of your Azure App Service.
*Click Settings, and then click Deployment slots.
*In the “deployment slots” blade click on Add Slot.
*In the “Add a slot” blade, give the slot a name, and select whether to clone web app configuration from another existing deployment slot.Azure Function Deployment Slot
Before creating deployment slots you need to have a useful pattern. In my opinion it is best to use a deployment slot as a pre production environment. This will lead to the following solution architecture.
This solution architecture makes sure that the development/ test / acceptation environment is completely separated from production. Via the pre production deployment slot you are able to test your application against the production SQL database. With this setup you can’t alter any data in pre-production this is why there is a dotted line between the pre production web app and the test / acceptation database. That you could use to test all your CRUD operations. Besides this is also makes sure that the pre production is as close to production as needed for a clear test results.Considerations
When making use of deployment slots there are a considerations and disadvantages to be aware of:
*The web application and deployment slots are created within the same environment (This is also the case when you create a Azure Web App within the same App Service Plan). This means resources between the two instances are shared, So if you want to do a stress test on pre-production you are certain that it will effect the performance of the production instance.
Besides the above disadvantage also consider the settings that can and can’t be swapped:
Swapped:
*General settings – such as framework version, 32/64-bit, Web sockets.
*App settings (you can configure it to stick to a slot).
*Connection strings (you can configure it to stick to a slot).
*Handler mappings.
*Monitoring and diagnostic settings.
*WebJobs content.Azure Slot Machines
Not swapped:Azure Web Slots Online
*Publishing endpoints.
*Custom Domain Names.
*SSL certificates and bindings.
*Scale settings.
*WebJobs schedulers.
Register here: http://gg.gg/oyov6
https://diarynote-jp.indered.space
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