[−][src]Struct k8s_openapi::api::core::v1::TopologySpreadConstraint
TopologySpreadConstraint specifies how to spread matching pods among the given topology.
Fields
label_selector: Option<LabelSelector>
LabelSelector is used to find matching pods. Pods that match this label selector are counted to determine the number of pods in their corresponding topology domain.
max_skew: i32
MaxSkew describes the degree to which pods may be unevenly distributed. It's the maximum permitted difference between the number of matching pods in any two topology domains of a given topology type. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 1/1/0: | zone1 | zone2 | zone3 | | P | P | | - if MaxSkew is 1, incoming pod can only be scheduled to zone3 to become 1/1/1; scheduling it onto zone1(zone2) would make the ActualSkew(2-0) on zone1(zone2) violate MaxSkew(1). - if MaxSkew is 2, incoming pod can be scheduled onto any zone. It's a required field. Default value is 1 and 0 is not allowed.
topology_key: String
TopologyKey is the key of node labels. Nodes that have a label with this key and identical values are considered to be in the same topology. We consider each <key, value> as a "bucket", and try to put balanced number of pods into each bucket. It's a required field.
when_unsatisfiable: String
WhenUnsatisfiable indicates how to deal with a pod if it doesn't satisfy the spread constraint. - DoNotSchedule (default) tells the scheduler not to schedule it - ScheduleAnyway tells the scheduler to still schedule it It's considered as "Unsatisfiable" if and only if placing incoming pod on any topology violates "MaxSkew". For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 3/1/1: | zone1 | zone2 | zone3 | | P P P | P | P | If WhenUnsatisfiable is set to DoNotSchedule, incoming pod can only be scheduled to zone2(zone3) to become 3/2/1(3/1/2) as ActualSkew(2-1) on zone2(zone3) satisfies MaxSkew(1). In other words, the cluster can still be imbalanced, but scheduler won't make it more imbalanced. It's a required field.
Trait Implementations
impl Clone for TopologySpreadConstraint
[src]
fn clone(&self) -> TopologySpreadConstraint
[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]
impl Debug for TopologySpreadConstraint
[src]
impl Default for TopologySpreadConstraint
[src]
fn default() -> TopologySpreadConstraint
[src]
impl<'de> Deserialize<'de> for TopologySpreadConstraint
[src]
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
D: Deserializer<'de>,
[src]
D: Deserializer<'de>,
impl PartialEq<TopologySpreadConstraint> for TopologySpreadConstraint
[src]
fn eq(&self, other: &TopologySpreadConstraint) -> bool
[src]
fn ne(&self, other: &TopologySpreadConstraint) -> bool
[src]
impl Serialize for TopologySpreadConstraint
[src]
impl StructuralPartialEq for TopologySpreadConstraint
[src]
Auto Trait Implementations
impl RefUnwindSafe for TopologySpreadConstraint
impl Send for TopologySpreadConstraint
impl Sync for TopologySpreadConstraint
impl Unpin for TopologySpreadConstraint
impl UnwindSafe for TopologySpreadConstraint
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
[src]
T: for<'de> Deserialize<'de>,
impl<T> From<T> for T
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
[src]
fn clone_into(&self, target: &mut T)
[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,