I have a resource in my Arm Template as follows:
parameters:
env
prodparam
nonprodparam
resources:
{
"type": "Microsoft.Resources/deployments",
"apiVersion": "2018-05-01",
"url": "[if(equals(parameters('env'),'prod'), parameters('prodparam'), parameters('nonprodparam'))]"
}
I see the url is always set to parameters('nonprodparam') even if parameters('env') = 'prod'. Is this if condition correct? Am I missing something?
Your if condition statement is correct, I tested it and got the correct result successfully.
You need to do the following steps to check where your problem is:
1. Check if your parameter definition is correct, especially as Stringfellow mentioned in the comment, to be case sensitive. It should be defined as follows.
2. Pay attention to whether to save after editing arm templates in the azure portal.
You can check the value of the parameter during the deployment process:
Related
In Short:
Is it possible to have condition field (or something else to achieve this functionality), inside a parameter, so that this parameter input will be asked to the user, only based on another parameter's value.
i.e., Only if user selects Create New on a parameter, the input for the name of that parameter should be asked.
In Detail:
I have a parameter virtualNetworkCreateNewOrUseExisting which will accept two values - Create New and Use Existing.
"parameters": {
"virtualNetworkCreateNewOrUseExisting": {
"type": "string",
"defaultValue": "Create New",
"allowedValues": [
"Create New",
"Use Existing"
]
},
// Other parameters
}
I am trying to create a Virtual Network based on an input from user.
If user selects Create New, it will be created, and if they select Use Existing, it will be skipped. I see that this is achievable by using condition field inside the resource.
"resources": [
{
"condition": "[equals(parameters('virtualNetworkCreateNewOrUseExisting'), 'Create New')]",
// Other fields
}
// Other resources
]
Now, my question here is that,
Similar to this, is it possible to have condition field, inside another parameter, so that this parameter input will be asked to the user, only based on the previous parameter value.
i.e., Only if user selects Create New, the input for Virtual Network Name should be asked.
Something like this, by using a condition field:
"parameters": {
"virtualNetworksName": {
"condition": "[equals(parameters('virtualNetworkCreateNewOrUseExisting'), 'Create New')]",
"defaultValue": "vn-1",
"type": "string"
},
// Other parameters
}
But, I see that condition field, is not supported inside parameters (at least as of now).
Or, is it at least possible to have, if statements, like this (So that, the value of the field will be displayed empty by default if user selects Use Existing.):
"parameters": {
"virtualNetworksName": {
"defaultValue": "[if(equals(parameters('virtualNetworkCreateNewOrUseExisting'),'Create New'), 'vn-1', '')]",
"type": "string"
},
// Other parameters
}
Or, any other way to achieve this goal?
You can't do this natively in the template file, but in the portal user experiences for deploying the template you can... See:
https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/template-specs-create-portal-forms
and
https://learn.microsoft.com/en-us/azure/azure-resource-manager/managed-applications/create-uidefinition-overview
You don't have to use a templateSpec or managedApp (see the "Deploy to Azure button here: https://github.com/Azure/azure-quickstart-templates/tree/master/demos/100-marketplace-sample )
but templateSpec or managedApp will give you a better experience if that's an option.
As per the current Azure documentation, we cannot add conditions to parameters in parameters block.
As a side note you can use PowerShell parameter inline functions while deploying the template.
We see that there is a feature request already in place to add Support functions within the definition of parameters... ยท Community (azure.com) We would suggest you to make a comment & Upvote on the exiting feedback request .
I am attempting to add availability zone into my VM arm template.
Majority of times I don't want the VM to be in a zone as it is a single VM.
So in my ARM template, I have defined the zone section as:
"zones":[
"[if(greaterOrEquals(parameters('availabilityZone'), 1),parameters('availabilityZone'),json('null'))]"
],
this works fine if I set a value of 1 or higher but fails if I leave as blank.
failed validation with message: 'The zone(s) '' for resource
'Microsoft.Compute/virtualMachines/XXX' is not supported.
if I remove the if condition then hard code in the blank it works:
"zones": "",
I appreciate your help in advance.
Stu
we found the following solution that worked:
"zones":
"if(empty(parameters('availabilityZone')),parameters('availabilityZone'),array(parameters('availabilityZone')))]"
Please try something like this, if your parameter doesn't contain then it will pass the empty value,
"zones": "[if(empty(parameters('availabilityZone')),'', parameters('availabilityZone'))]",
https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/template-functions-string?tabs=json#empty
Is it possible to perform custom validation on two parameters and ensure they are equal?
I want to have something like password and password_confirm that must be equal before deploying any of the resources.
yeah, you can hack something like that, just create a resource that will fail and all the other resources would depend on it and then on the resource condition do:
"condition": "[not(equals(parameters('password'), parameters('password_confirm'))]"
that way if they are not equal fake resource would start getting deployed and would blow up (make sure you code it to blow up) and nothing would get deployed
now that I think of it, instead of creating a resource, just put a condition on all of the resources in the template:
"condition": "[equals(parameters('password'), parameters('password_confirm')]"
that way they will only get deployed if these match, but you won't have a failure.
Another option would be to add a parameter to do the validation... this is simpler but not as robust because the user could override the defaultValue of the parameter:
"validatePasswords": {
"type": "bool",
"allowedValues": [
true
],
"defaultValue": "[equals(parameters('password'), parameters('password_confirm'))]",
"metadata": {
"description": "Check to see if the 2 passwords match."
}
},
Putting a condition on each resource will work (and is harder to fool), but the deployment may succeed even though nothing is deployed.
I find instructions for using ARM templates to create or make changes to CosmosDB, but none of them contain instructions on how to add a CompositeIndex to the template. I have also heard it is not supported in the template and has to be done with PowerShell or Azure CLI script, but have not been able to find a supporting content on the net. Can someone please shed light on this?
I've not tested this but according to the Microsoft.DocumentDB resource provider docs / template reference there is a Microsoft.DocumentDB/databaseAccounts/apis/databases/containers resource which may give you what you need.
Every container has an IndexingPolicy in the template schema, which has an array of IncludedPath objects which themselves have an array of Index objects as follows:
"includedPaths": [
{
"path": "string",
"indexes": [
{
"dataType": "string",
"precision": "integer",
"kind": "string"
}
]
}
]
It's treated as a separate resource from the database / account altogether. You may want to add this resource to your template with an appropriate dependsOn value to ensure it's deployed after your database.
You can add multiple paths therefore making a composite index.
Full schema is here:
https://learn.microsoft.com/en-us/azure/templates/microsoft.documentdb/2015-04-08/databaseaccounts/apis/databases/containers
If this doesn't do it, you may want to look at this too as the schema docs may be out of date and compositeIndexes may be supported:
https://learn.microsoft.com/en-us/azure/cosmos-db/how-to-manage-indexing-policy#composite-indexing-policy-examples
I am writing ARM scripts for my Azure infra. I have sample output variable in my ARM
"OutputVariables": [{
"name" : "MY_OUTPUTVARIABLE_1",
"description" : "This is the description of my output variable."
},
{
"name" : "MY_OUTPUTVARIABLE_2",
"description" : "Description can contains markdown [vsts-tasks](https://github.com/microsoft/vsts-tasks)"
}]
I want to access these ARM output variables in the next task of my VSTS release tasks.
I am not able to access variable MY_OUTPUTVARIABLE_1.
Please suggest how to use ARM output variables.
Thanks
This article shows you how to parse the output variables in VSTS. You need to make sure you define them as outputs of the task so VSTS knows what to look for. This can be found in the Output Variables section at the bottom of the task.
If it isn't initialised in the pipeline it can't be found. Also it's worth noting the ARM template you have provided doesn't actually set a value for the parameter. The ARM documentation shows the correct way of setting output variables.
"outputs": {
"resourceID": {
"type": "string",
"value": "[resourceId('Microsoft.Network/publicIPAddresses', parameters('publicIPAddresses_name'))]"
}
}
Hope that helps.