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api: Add DaemonSet MaxSurge

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The MaxSurge field on DaemonSet rolling updates allows a daemonset
workload to have two pods running simultaneously on a node during
an update in order to perform zero-disruption handoffs of client
traffic.
This commit is contained in:
Clayton Coleman
2020-11-05 14:54:52 -05:00
parent 8b8de03168
commit 5aa53f885c
12 changed files with 158 additions and 43 deletions
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7
pkg/apis/extensions/v1beta1/defaults.go
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@@ -19,7 +19,7 @@ package v1beta1
import (
"math"
"k8s.io/api/core/v1"
v1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
@@ -58,6 +58,11 @@ func SetDefaults_DaemonSet(obj *extensionsv1beta1.DaemonSet) {
maxUnavailable := intstr.FromInt(1)
updateStrategy.RollingUpdate.MaxUnavailable = &maxUnavailable
}
if updateStrategy.RollingUpdate.MaxSurge == nil {
// Set default MaxSurge as 0 by default.
maxSurge := intstr.FromInt(0)
updateStrategy.RollingUpdate.MaxSurge = &maxSurge
}
}
if obj.Spec.RevisionHistoryLimit == nil {
obj.Spec.RevisionHistoryLimit = new(int32)