How do I configure app insights instrumentation for app service via terraform?

How do I configure App Insights instrumentation for an app service via Terraform? Is it all via app_settings, or is there a resource I am missing?

I create app insights resource:

resource "azurerm_application_insights" "app1" { for_each = local.all_envs application_type = "web" location = azurerm_resource_group.rg-webapps.location name = "appi-app1-${each.value}" resource_group_name = azurerm_resource_group.rg-webapps.name retention_in_days = 30 sampling_percentage = 0 workspace_id = azurerm_log_analytics_workspace.log-analytics-workspace[each.value].id
}

I tie it to my app service:

resource "azurerm_windows_web_app" "app1" { name = "app1" location = azurerm_resource_group.rg-webapps.location resource_group_name = azurerm_resource_group.rg-webapps.name ... app_settings = { APPLICATIONINSIGHTS_ROLE_NAME = "role1" APPINSIGHTS_INSTRUMENTATIONKEY = azurerm_application_insights.app1["dev"].instrumentation_key APPLICATIONINSIGHTS_CONNECTION_STRING = azurerm_application_insights.app1["dev"].connection_string } ...

}

But it says application insights is not fully enabled:

Is instrumentation controlled by these config keys, which I have to manually set?

2 Answers

Tried to check with appsettings for instrumentation key and connection string in my case and it was not enabled in portal.

app_settings = { "APPINSIGHTS_INSTRUMENTATIONKEY" = azurerm_application_insights.<app>.instrumentation_key "APPLICATIONINSIGHTS_CONNECTION_STRING" = azurerm_application_insights.<app>.connection_string
}

Also include ApplicationInsightsAgent_EXTENSION_VERSION in the app settings .

app_settings = { "APPINSIGHTS_INSTRUMENTATIONKEY" = azurerm_application_insights.<app>.instrumentation_key "APPLICATIONINSIGHTS_CONNECTION_STRING" = azurerm_application_insights.<app>.connection_string "APPINSIGHTS_PORTALINFO" = "ASP.NET" "APPINSIGHTS_PROFILERFEATURE_VERSION" = "1.0.0" "ApplicationInsightsAgent_EXTENSION_VERSION" = "~2"
}

For working properly, your app may require additional settings from below: check what works for your app.

• "APPINSIGHTS_INSTRUMENTATIONKEY"
• "APPINSIGHTS_PROFILERFEATURE_VERSION"
• "APPINSIGHTS_SNAPSHOTFEATURE_VERSION"
• "APPLICATIONINSIGHTS_CONNECTION_STRING"
• "ApplicationInsightsAgent_EXTENSION_VERSION"
• "DiagnosticServices_EXTENSION_VERSION"
• "InstrumentationEngine_EXTENSION_VERSION"
• "SnapshotDebugger_EXTENSION_VERSION"
• "XDT_MicrosoftApplicationInsights_BaseExtensions"
• "XDT_MicrosoftApplicationInsights_Mode"

And try to set a tag on the azurerm_application_insights as said by nancy in SO reference

resource "azurerm_application_insights" "webapp-ka-repo" {
... tags { "hidden-link:/subscriptions/<subscription id>/resourceGroups/<rg name>/providers/ name>": "Resource" }
}

or

tags = { "hidden-link:/subscriptions/${data.azurerm_subscription.current.subscription_id}/resourceGroups/${azurerm_resource_group.example.name}/providers/ = "Resource" }

and check if it is enabled.

I just had this same problem myself, a linux app plan with two apps

1. linux_web_app
2. linux_function_app

the function_app was really straight forward, it could be assosiated and enabled via the site_config block of the function app resource

 site_config { always_on = false application_insights_connection_string = azurerm_application_insights.<your_app_insights_resource_name>.connection_string application_insights_key = azurerm_application_insights.<your_app_insights_resource_name>.instrumentation_key }

However the web_app was a bit trickier: configured through the app_settings argument, started with the same two

app_settings = { APPINSIGHTS_INSTRUMENTATIONKEY = "${azurerm_application_insights.<your_app_insights_resource_name>.instrumentation_key}" APPLICATIONINSIGHTS_CONNECTION_STRING = "${azurerm_application_insights.<your_app_insights_resource_name>.connection_string}"
}

this seemed to link or associate the web_app with app_insights, but frustratingly, NOT enable it!

after spending way to long trying other suggestions found on the internet, and not getting anywher, i asked our friendly neighbourhood AI if it had any suggestions, and it did...

adding the following config to the app_settings

APPINSIGHTS_PROFILERFEATURE_VERSION = "1.0.0"
APPINSIGHTS_SNAPSHOTFEATURE_VERSION = "1.0.0"
ApplicationInsightsAgent_EXTENSION_VERSION = "~2"
DiagnosticServices_EXTENSION_VERSION = "~3"
InstrumentationEngine_EXTENSION_VERSION = "~2"
SnapshotDebugger_EXTENSION_VERSION = "1.0.15"
XDT_MicrosoftApplicationInsights_BaseExtensions = "disabled"
XDT_MicrosoftApplicationInsights_Mode = "recommended"

seemed to do the trick in my case, hope this helps 😉