Re: D2D4112 Backup System - A Slot Mapping is not in sync I would recommend you raise a support call via HP support to help you resolve the issue. A new firmware version was released on 12th April, see hp.com support for your product type for download and installation instructions. I followed these steps pretty much exactly and everything works perfect. I did a master reset and I did not install the optional update pack and I had no issues with my map card. Also worth noting to fix IPC so instead of compass it says Navigation: 720-01-01 E5C0-29BE-24D9 needs to be E5C2-29BE-24DB.
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This post explains some of the not so well-known features and configurations settings of the Azure App Service deployment slots. These can be used to modify the swap logic as well as to improve the application availability during and after the swap. Here is what you can do with them:
Swap based on the status code
During the swap operation the site in the staging slot is warmed up by making an HTTP request to its root directory. More detailed explanation of that process is available at How to warm up Azure Web App during deployment slots swap. By default the swap will proceed as long as the site responds with any status code. However, if you prefer the swap to not proceed if the application fails to warm up then you can configure it by using these app settings:
WEBSITE_SWAP_WARMUP_PING_PATH: The path to make the warm up request to. Set this to a URL path that begins with a slash as the value. For example, '/warmup.php'. The default value is /.WEBSITE_SWAP_WARMUP_PING_STATUSES:Expected HTTP response codes for the warm-up operation. Set this to a comma-separated list of HTTP status codes. For example: '200,202' . If the returned status code is not in the list, the swap operation will not complete. By default, all response codes are valid.
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You can mark those two app setting as 'Slot Settings' which would make them remain with the slot during the swap. Or you can have them as 'non-sticky' settings meaning that they would move with the site as it gets swapped between slots.
Minimize random cold starts
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In some cases after the swap the web app in the production slot may restart later without any action taken by the app owner. Biggest gambling companies in europe. This usually happens when the underlying storage infrastructure of Azure App Service undergoes some changes. When that happens the application will restart on all VMs at the same time which may result in a cold start and a high latency of the HTTP requests. While you cannot control the underlying storage events you can minimize the effect they have on your app in the production slot. Set this app setting on every slot of the app:
WEBSITE_ADD_SITENAME_BINDINGS_IN_APPHOST_CONFIG: setting this to '1' will prevent web app's worker process and app domain from recycling when the App Service's storage infrastructure gets reconfigured.
The only side effect this setting has is that it may cause problems when used with some Windows Communication Foundation (WCF) application. If you app does not use WCF then there is no downside of using this setting.
Control SLOT-sticky configuration
Originally when deployment slots functionality was released it did not properly handle some of the common site configuration settings during swap. For example if you configured IP restrictions on the production slot but did not configure that on the staging slot and then performed the swap you would have had the production slot without any IP restrictions configuration, while the staging slot had the IP restrictions enabled. That did not make much sense so the product team has fixed that. Now the following settings always remain with the slot:
WEBSITE_ADD_SITENAME_BINDINGS_IN_APPHOST_CONFIG: setting this to '1' will prevent web app's worker process and app domain from recycling when the App Service's storage infrastructure gets reconfigured.
The only side effect this setting has is that it may cause problems when used with some Windows Communication Foundation (WCF) application. If you app does not use WCF then there is no downside of using this setting.
Control SLOT-sticky configuration
Originally when deployment slots functionality was released it did not properly handle some of the common site configuration settings during swap. For example if you configured IP restrictions on the production slot but did not configure that on the staging slot and then performed the swap you would have had the production slot without any IP restrictions configuration, while the staging slot had the IP restrictions enabled. That did not make much sense so the product team has fixed that. Now the following settings always remain with the slot:
- IP Restrictions
- Always On
- Protocol settings (Https Only, TLS version, client certificates)
- Diagnostic Log settings
- CORS
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If however for any reason you need to revert to the old behavior of swapping these settings then you can add the app setting WEBSITE_OVERRIDE_PRESERVE_DEFAULT_STICKY_SLOT_SETTINGS to every slot of the app and set its value to '0' or 'false'.
swap Diagnostics detector
If a swap operation did not complete successfully for any reason you can use the diagnostics detector to see what has happened during the swap operation and what caused it to fail. To get to it use the 'Diagnose and solve problems' link in the portal:
From there click on 'Check Swap Operations' which will open a page showing all the swaps performed on the webapp and their results. It will include possible root causes for the failures and recommendations on how to fix them.
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