Deployment slots are very useful service from Azure cloud services, this isolate enviorment for developers to develope and test the codes in a seamless manner.The feature swap, enable the developers to rapid deployment and easy roll out roll back.
- Azure Deployment Slots Cost Per
- Azure Deployment Slots Cost Chart
- Azure Deployment Slots Cost Calculator
- Azure Deployment Slots Cost
Creating a deployment slot is very easy and, as always, there are many ways to do it. You can use the Azure Portal, Azure CLI, Azure PowerShell and the Azure Management API. I'll show you how to do it using the Azure Portal. In the Azure Portal, navigate to your App Service - let's say it's a Web App - and click the deployment slots menu. Azure Deployment Slots – a brief introduction. Deployment Slots are a capability of Azure Web Apps (previously known as Azure Websites). They are only available when you're using a Standard or Premium pricing plan. If you go into the 'Settings' area of your web app, you can click into 'Deployment Slots' and from here create a slot. Azure Deployment Slot Pricing Some symbols may seem to show up only occasionally Azure Deployment Slot Pricing on the reel, while other symbols may appear frequently or more often. All Online Slots games have a virtual reel that determines whether you win or Azure Deployment Slot Pricing not. Azure Functions deployment slots allow your function app to run different instances called 'slots'. Slots are different environments exposed via a publicly available endpoint. One app instance is always mapped to the production slot, and you can swap instances assigned to a slot on demand.
For an example your web users connected and accessing the original production site on the production slot,you can deploy a new version of the Web App into a secondary deployment slot, so you can test it before it goes live.
Slots are based on the application services(standard ,premium or isolated)and running on the same application services.There won,t be any additional cost.
Features
Hot deployments to production with out downtime
Easy roll out and roll back
Benifits of Deploying application to a non-production slot
Validate app changes in a staging deployment slot before swapping it with the production slot.
Deploying an app to a slot first and swapping it into production makes sure that all instances of the slot are warmed up before being swapped into production.
If the changes swapped into the production slot aren't as you expect, you can perform the same swap immediately to get your 'last known good site' back.
Setting up
Suppose, you have a production site which is running and don't want to disturb the site,create a clone site and modify the codes and test it.
In the Azure Portal, navigate to App Service and click the deployment slots menu item
click on the add slot
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clone the site
This will create a same your production site,but the site name is different(with your slot name).
divide your traffic
By default, Traffic % is set to 0 for the new slot, and all traffic routed to the production slot.We can change the traffic % divided to both the slots.
swap
When swap the slots,from a staging slot into the production slot after code changes to know,how the web page looks like with out production downtime and revert back to old.
To configure auto swap:
Go to your app's resource page. Select Deployment slots > > Configuration > General settings.
For Auto swap enabled, select On. Then select the desired target slot for Auto swap deployment slot, and select Save on the command bar.
Using powershell create web app
New-AzWebApp -ResourceGroupName [resource group name] -Name [app name] -Location [location] -AppServicePlan [app service plan name]
create slot
New-AzWebAppSlot -ResourceGroupName [resource group name] -Name [app name] -Slot [deployment slot name] -AppServicePlan [app service plan name]
Azure Deployment Slots Cost Chart
Initiate a swap with a preview (multi-phase swap), and apply destination slot configuration to the source slot
$ParametersObject = @{targetSlot = '[slot name – e.g. 'production']'}
Invoke-AzResourceAction -ResourceGroupName [resource group name] -ResourceType Microsoft.Web/sites/slots -ResourceName [app name]/[slot name] -Action applySlotConfig -Parameters $ParametersObject -ApiVersion 2015-07-01
Cancel a pending swap (swap with review) and restore the source slot configuration
Invoke-AzResourceAction -ResourceGroupName [resource group name] -ResourceType Microsoft.Web/sites/slots -ResourceName [app name]/[slot name] -Action resetSlotConfig -ApiVersion 2015-07-01
Swap deployment slots
$ParametersObject = @{targetSlot = '[slot name – e.g. 'production']'}
Invoke-AzResourceAction -ResourceGroupName [resource group name] -ResourceType Microsoft.Web/sites/slots -ResourceName [app name]/[slot name] -Action slotsswap -Parameters $ParametersObject -ApiVersion 2015-07-01
Monitor swap events in the activity log
Get-AzLog -ResourceGroup [resource group name] -StartTime 2018-03-07 -Caller SlotSwapJobProcessor
Delete a slot
Remove-AzResource -ResourceGroupName [resource group name] -ResourceType Microsoft.Web/sites/slots –Name [app name]/[slot name] -ApiVersion 2015-07-01
Azure Deployment Slots Cost Calculator
See the video
Azure Deployment Slots Cost
other references
https://teckadmin.wordpress.com/2019/07/06/create-demo-app-web-site-in-azure-using-azure-cli/
https://teckadmin.wordpress.com/2019/07/06/create-your-first-we-application-in-azure/
