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use crate::{builder::ObjectMetaBuilder, labels::role_selector_labels}; | ||
use k8s_openapi::{ | ||
api::policy::v1::{PodDisruptionBudget, PodDisruptionBudgetSpec}, | ||
apimachinery::pkg::{ | ||
apis::meta::v1::{LabelSelector, ObjectMeta}, | ||
util::intstr::IntOrString, | ||
}, | ||
}; | ||
use kube::{Resource, ResourceExt}; | ||
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||
#[derive(Debug, Default)] | ||
pub struct PdbBuilder<ObjectMeta, LabelSelector, Constraints> { | ||
metadata: ObjectMeta, | ||
selector: LabelSelector, | ||
/// We intentionally only support fixed numbers, so percentage, see ADR on Pod disruptions for details. | ||
/// We use u16, as [`IntOrString`] takes an i32 and we don't want to allow negative numbers. u16 will always fit in i32. | ||
max_unavailable: Option<u16>, | ||
/// We intentionally only support fixed numbers, so percentage, see ADR on Pod disruptions for details. | ||
/// We use u16, as [`IntOrString`] takes an i32 and we don't want to allow negative numbers. u16 will always fit in i32. | ||
min_available: Option<u16>, | ||
/// Tracks wether either [`max_unavailable`] or [`min_available`] is set | ||
_constraints: Constraints, | ||
} | ||
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impl PdbBuilder<(), (), ()> { | ||
pub fn new() -> Self { | ||
PdbBuilder::default() | ||
} | ||
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pub fn new_for_role<T: Resource>( | ||
owner: &T, | ||
app_name: &str, | ||
role: &str, | ||
) -> PdbBuilder<ObjectMeta, LabelSelector, ()> { | ||
let metadata = ObjectMetaBuilder::new() | ||
.namespace_opt(owner.namespace()) | ||
.name(format!("{}-{}", owner.name_any(), role)) | ||
.build(); | ||
let role_selector_labels = role_selector_labels(owner, app_name, role); | ||
PdbBuilder { | ||
metadata, | ||
selector: LabelSelector { | ||
match_expressions: None, | ||
match_labels: Some(role_selector_labels), | ||
}, | ||
..PdbBuilder::default() | ||
} | ||
} | ||
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pub fn metadata(self, metadata: impl Into<ObjectMeta>) -> PdbBuilder<ObjectMeta, (), ()> { | ||
PdbBuilder { | ||
metadata: metadata.into(), | ||
selector: self.selector, | ||
max_unavailable: self.max_unavailable, | ||
min_available: self.min_available, | ||
_constraints: self._constraints, | ||
} | ||
} | ||
} | ||
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impl PdbBuilder<ObjectMeta, (), ()> { | ||
pub fn selector(self, selector: LabelSelector) -> PdbBuilder<ObjectMeta, LabelSelector, ()> { | ||
PdbBuilder { | ||
metadata: self.metadata, | ||
selector, | ||
max_unavailable: self.max_unavailable, | ||
min_available: self.min_available, | ||
_constraints: self._constraints, | ||
} | ||
} | ||
} | ||
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impl PdbBuilder<ObjectMeta, LabelSelector, ()> { | ||
pub fn max_unavailable( | ||
self, | ||
max_unavailable: u16, | ||
) -> PdbBuilder<ObjectMeta, LabelSelector, bool> { | ||
PdbBuilder { | ||
metadata: self.metadata, | ||
selector: self.selector, | ||
max_unavailable: Some(max_unavailable), | ||
min_available: self.min_available, | ||
_constraints: true, // Some dummy value to set Constraints to something other than () | ||
} | ||
} | ||
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pub fn min_available(self, min_available: u16) -> PdbBuilder<ObjectMeta, LabelSelector, bool> { | ||
PdbBuilder { | ||
metadata: self.metadata, | ||
selector: self.selector, | ||
max_unavailable: self.max_unavailable, | ||
min_available: Some(min_available), | ||
_constraints: true, // Some dummy value to set Constraints to something other than () | ||
} | ||
} | ||
} | ||
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impl PdbBuilder<ObjectMeta, LabelSelector, bool> { | ||
pub fn build(self) -> PodDisruptionBudget { | ||
PodDisruptionBudget { | ||
metadata: self.metadata, | ||
spec: Some(PodDisruptionBudgetSpec { | ||
max_unavailable: self.max_unavailable.map(i32::from).map(IntOrString::Int), | ||
min_available: self.min_available.map(i32::from).map(IntOrString::Int), | ||
selector: Some(self.selector), | ||
/// As this is beta as of 1.27 we can not use it yet, | ||
/// so this builder does not offer this attribute. | ||
unhealthy_pod_eviction_policy: Default::default(), | ||
}), | ||
..Default::default() | ||
} | ||
} | ||
} | ||
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#[cfg(test)] | ||
mod test { | ||
use std::collections::BTreeMap; | ||
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use k8s_openapi::{ | ||
api::policy::v1::{PodDisruptionBudget, PodDisruptionBudgetSpec}, | ||
apimachinery::pkg::{apis::meta::v1::LabelSelector, util::intstr::IntOrString}, | ||
}; | ||
use kube::{core::ObjectMeta, CustomResource}; | ||
use schemars::JsonSchema; | ||
use serde::{Deserialize, Serialize}; | ||
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use crate::builder::ObjectMetaBuilder; | ||
|
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use super::PdbBuilder; | ||
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#[test] | ||
pub fn test_normal_build() { | ||
let pdb = PdbBuilder::new() | ||
.metadata( | ||
ObjectMetaBuilder::new() | ||
.namespace("default") | ||
.name("trino") | ||
.build(), | ||
) | ||
.selector(LabelSelector { | ||
match_expressions: None, | ||
match_labels: Some(BTreeMap::from([("foo".to_string(), "bar".to_string())])), | ||
}) | ||
.min_available(42) | ||
.build(); | ||
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assert_eq!( | ||
pdb, | ||
PodDisruptionBudget { | ||
metadata: ObjectMeta { | ||
name: Some("trino".to_string()), | ||
namespace: Some("default".to_string()), | ||
..Default::default() | ||
}, | ||
spec: Some(PodDisruptionBudgetSpec { | ||
min_available: Some(IntOrString::Int(42)), | ||
selector: Some(LabelSelector { | ||
match_expressions: None, | ||
match_labels: Some(BTreeMap::from([( | ||
"foo".to_string(), | ||
"bar".to_string() | ||
)])), | ||
}), | ||
..Default::default() | ||
}), | ||
..Default::default() | ||
} | ||
) | ||
} | ||
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#[test] | ||
pub fn test_build_from_role() { | ||
#[derive( | ||
Clone, CustomResource, Debug, Deserialize, Eq, JsonSchema, PartialEq, Serialize, | ||
)] | ||
#[kube(group = "test", version = "v1", kind = "TrinoCluster", namespaced)] | ||
pub struct TrinoClusterSpec {} | ||
let trino: TrinoCluster = serde_yaml::from_str( | ||
" | ||
apiVersion: test/v1 | ||
kind: TrinoCluster | ||
metadata: | ||
name: simple-trino | ||
namespace: default | ||
spec: {} | ||
", | ||
) | ||
.unwrap(); | ||
let app_name = "trino"; | ||
let role = "worker"; | ||
let pdb = PdbBuilder::new_for_role(&trino, app_name, role) | ||
.max_unavailable(2) | ||
.build(); | ||
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assert_eq!( | ||
pdb, | ||
PodDisruptionBudget { | ||
metadata: ObjectMeta { | ||
name: Some("simple-trino-worker".to_string()), | ||
namespace: Some("default".to_string()), | ||
..Default::default() | ||
}, | ||
spec: Some(PodDisruptionBudgetSpec { | ||
max_unavailable: Some(IntOrString::Int(2)), | ||
selector: Some(LabelSelector { | ||
match_expressions: None, | ||
match_labels: Some(BTreeMap::from([ | ||
("app.kubernetes.io/name".to_string(), "trino".to_string()), | ||
( | ||
"app.kubernetes.io/instance".to_string(), | ||
"simple-trino".to_string() | ||
), | ||
( | ||
"app.kubernetes.io/component".to_string(), | ||
"worker".to_string() | ||
) | ||
])), | ||
}), | ||
..Default::default() | ||
}), | ||
..Default::default() | ||
} | ||
) | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,29 @@ | ||
use schemars::JsonSchema; | ||
use serde::{Deserialize, Serialize}; | ||
|
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#[derive(Clone, Debug, Deserialize, JsonSchema, PartialEq, Serialize)] | ||
#[serde(rename_all = "camelCase")] | ||
pub struct Pdb { | ||
/// Wether a PodDisruptionBudget should be written out for this role. | ||
/// Disabling this enables you to specify you own - custom - one. | ||
/// Defaults to true. | ||
#[serde(default = "default_pdb_enabled")] | ||
pub enabled: bool, | ||
/// The number of Pods that are allowed to be down because of voluntary disruptions. | ||
/// If you don't explicitly set this, the operator will use a sane default based | ||
/// upon knowledge about the individual product. | ||
pub max_unavailable: Option<u16>, | ||
} | ||
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fn default_pdb_enabled() -> bool { | ||
true | ||
} | ||
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impl Default for Pdb { | ||
fn default() -> Self { | ||
Self { | ||
enabled: true, | ||
max_unavailable: None, | ||
} | ||
} | ||
} |
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