Unable to clear RollingUpgradePolicy in Virtual Machine Scaleset

[JunyiYi]

RollingUpgradePolicy is an optional parameter in Virtual Machine Scaleset. But I'm not able to remove it once it is set. I tried using null, using empty object {}, I also tried pass nothing, but no luck to succeed.

Thanks.

[holderbaum]

Hello Azure Team,

apparently, this issue is hindering the terraform development. Right now, there is no way to configure a rolling update for VMSS via terraform. Since the rolling update is quite a central and useful feature of the scale sets, this is a big issue for us.

Is there any estimate when this issue will be fixed? 😃

Cheers
Jakob

[anuchandy]

Just a thought – the documentation https://docs.microsoft.com/en-us/rest/api/compute/virtualmachinescalesets/createorupdate#rollingupgradepolicy describes the default values for various properties of RollingUpgradePolicy, i.e. it describes the value service uses if we create a VMSS without explicitly setting RollingUpgradePolicy.

Given above documentation, If someone want to remove RollingUpgradePolicy it means they want to rollback to the default value that service uses, right? If so – can we explicitly pass the default values that documentation describes & work around for now while compute team looking into it?

new RollingUpgradePolicy {
maxBatchInstancePercent: 20,
maxUnhealthyInstancePercent: 20,
maxUnhealthyUpgradedInstancePercent: 20,
pauseTimeBetweenBatches: 0
};

[JunyiYi]

Thanks @anuchandy for the workaround.
It might be a good idea for users who wants to remove the value.
But this method will affect users who initially does not set the value since we will always set the default values for them in this workaround. And finally Terraform will report to them that their VMSS is changed (new properties added).

[salameer]

@anuchandy, is this still an issue based of JuniY? if so please add "Service attention" label to it

[ghost]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @Drewm3, @avirishuv, @Vaibhav-Agar, @amjads1.

Issue Details

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RollingUpgradePolicy is an optional parameter in Virtual Machine Scaleset. But I'm not able to remove it once it is set. I tried using null, using empty object {}, I also tried pass nothing, but no luck to succeed.

Thanks.

Author:	JunyiYi
Assignees:	-
Labels:	Compute, Service Attention
Milestone:	-