Bug: DeploymentOutputEvaluationFailed

[ansmah]

Deployment Mode

Deploy To Azure

Steps to reproduce

Error when choosing deploy in Azure Landing Zone (former Enterprise-Scale Landing Zone) environment when specifying Third Party Appliance firewall and the DNS Forwarder IP addresses of existing environment.

Error Message

{
    "status": "Failed",
    "error": {
        "code": "DeploymentOutputEvaluationFailed",
        "message": "Unable to evaluate template outputs: 'serviceSubnet'. Please see error details and deployment operations. Please see https://aka.ms/arm-debug for usage details.",
        "details": [
            {
                "code": "DeploymentOutputEvaluationFailed",
                "target": "serviceSubnet",
                "message": "The template output 'serviceSubnet' is not valid: The language expression property array index '1' is out of bounds.."
            }
        ]
    }
}

Screenshots

No response

Code of Conduct

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[marvinbuss]

Thanks for sharing this issue ansmah. Let me try to reproduce this on my side.

[marvinbuss]

Hi ansmah I just tried reproducing the issue in the portal, but I was not able to get the same error. Would you be able to share the selected IP addresses with me?
You can also reach out to me on LinkedIn and share the information in a private message: https://www.linkedin.com/in/marvinbuss/

[ansmah]

hi Marvin Buss (@marvinbuss) I have shared details with the IP addresses I have used in the portal with you over LinkedIn

[ansmah]

Marvin Buss (@marvinbuss) I think the issue is in network.bicep where its specified in output to look for
output serviceSubnet string = vnet.properties.subnets[1].id

In the case where
"enableDnsAndFirewallDeployment": {

        "value": false

    },

There is only one element returned in var subnets.
Trying this locally to see if we can make it work here.

output serviceSubnet string = enableDnsAndFirewallDeployment ? vnet.properties.subnets[1].id : vnet.properties.subnets[0].id

[abdale]

I'm seeing the same issue only when I try to deploy into Azure Landing Zone.

"statusMessage": "{\"status\":\"Failed\",\"error\":{\"code\":\"ResourceDeploymentFailure\",\"message\":\"The resource operation completed with terminal provisioning state 'Failed'.\",\"details\":[{\"code\":\"DeploymentOutputEvaluationFailed\",\"message\":\"Unable to evaluate template outputs: 'serviceSubnet'. Please see error details and deployment operations. Please see https://aka.ms/arm-debug for usage details.\",\"details\":[{\"code\":\"DeploymentOutputEvaluationFailed\",\"target\":\"serviceSubnet\",\"message\":\"The template output 'serviceSubnet' is not valid: The language expression property array index '1' is out of bounds..\"}]}]}}",

[ansmah]

the modified output line allows me to deploy into Landing Zone.

[imcloud-unni]

ansmah Could you please let me know, whether you changed that particular line only in network.bicep file OR did any other additional step. I also changed the line, but the same error happening.