## DeviceConstraint

# Struct DeviceConstraint

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    pub struct DeviceConstraint {
        pub distinct_attribute: Option<String>,
        pub match_attribute: Option<String>,
        pub requests: Option<Vec<String>>,
    }

Expand description

DeviceConstraint must have exactly one field set besides Requests.

## Fields§

§`distinct_attribute: Option<String>`

DistinctAttribute requires that all devices in question have this attribute and that its type and value are unique across those devices.

This acts as the inverse of MatchAttribute.

This constraint is used to avoid allocating multiple requests to the same device by ensuring attribute-level differentiation.

This is useful for scenarios where resource requests must be fulfilled by separate physical devices. For example, a container requests two network interfaces that must be allocated from two different physical NICs.

§`match_attribute: Option<String>`

MatchAttribute requires that all devices in question have this attribute and that its type and value are the same across those devices.

For example, if you specified “dra.example.com/numa” (a hypothetical example!), then only devices in the same NUMA node will be chosen. A device which does not have that attribute will not be chosen. All devices should use a value of the same type for this attribute because that is part of its specification, but if one device doesn’t, then it also will not be chosen.

Must include the domain qualifier.

§`requests: Option<Vec<String>>`

Requests is a list of the one or more requests in this claim which must co-satisfy this constraint. If a request is fulfilled by multiple devices, then all of the devices must satisfy the constraint. If this is not specified, this constraint applies to all requests in this claim.

References to subrequests must include the name of the main request and may include the subrequest using the format <main request>[/<subrequest>]. If just the main request is given, the constraint applies to all subrequests.

## Trait Implementations§

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### impl Clone for DeviceConstraint

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#### fn clone(&self) -> DeviceConstraint

Returns a duplicate of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for DeviceConstraint

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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### impl DeepMerge for DeviceConstraint

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#### fn merge_from(&mut self, other: Self)

Merge `other` into `self`.
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### impl Default for DeviceConstraint

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#### fn default() -> DeviceConstraint

Returns the “default value” for a type. Read more
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### impl<'de> Deserialize<'de> for DeviceConstraint

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#### fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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### impl PartialEq for DeviceConstraint

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#### fn eq(&self, other: &DeviceConstraint) -> bool

Tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

Tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl Serialize for DeviceConstraint

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#### fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
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### impl StructuralPartialEq for DeviceConstraint

## Auto Trait Implementations§

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### impl Freeze for DeviceConstraint

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### impl RefUnwindSafe for DeviceConstraint

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### impl Send for DeviceConstraint

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### impl Sync for DeviceConstraint

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### impl Unpin for DeviceConstraint

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### impl UnwindSafe for DeviceConstraint

## Blanket Implementations§

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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,