OpenKruise：解放 DaemonSet 运维之路

apiVersion: apps/v1kind: DaemonSetspec:  updateStrategy:    type: RollingUpdate    rollingUpdate:      maxUnavailable: 2  # ...

apiVersion: apps/v1kind: DaemonSetspec:  updateStrategy:    type: OnDelete  # ...

const (+    // StandardRollingUpdateType replace the old daemons by new ones using rolling update i.e replace them on each node one after the other.+    // this is the default type for RollingUpdate.+    StandardRollingUpdateType RollingUpdateType = "Standard"
+    // SurgingRollingUpdateType replaces the old daemons by new ones using rolling update i.e replace them on each node one+    // after the other, creating the new pod and then killing the old one.+    SurgingRollingUpdateType RollingUpdateType = "Surging")
// Spec to control the desired behavior of daemon set rolling update.type RollingUpdateDaemonSet struct {+    // Type is to specify which kind of rollingUpdate.+    Type RollingUpdateType `json:"rollingUpdateType,omitempty" protobuf:"bytes,1,opt,name=rollingUpdateType"`
    // ...    MaxUnavailable *intstr.IntOrString `json:"maxUnavailable,omitempty" protobuf:"bytes,2,opt,name=maxUnavailable"`
+    // A label query over nodes that are managed by the daemon set RollingUpdate.+    // Must match in order to be controlled.+    // It must match the node's labels.+    Selector *metav1.LabelSelector `json:"selector,omitempty" protobuf:"bytes,3,opt,name=selector"`
+    // The number of DaemonSet pods remained to be old version.+    // Default value is 0.+    // Maximum value is status.DesiredNumberScheduled, which means no pod will be updated.+    // +optional+    Partition *int32 `json:"partition,omitempty" protobuf:"varint,4,opt,name=partition"`
+    // Indicates that the daemon set is paused and will not be processed by the+    // daemon set controller.+    // +optional+    Paused *bool `json:"paused,omitempty" protobuf:"varint,5,opt,name=paused"`
+    // Only when type=SurgingRollingUpdateType, it works.+    // The maximum number of DaemonSet pods that can be scheduled above the desired number of pods+    // during the update. Value can be an absolute number (ex: 5) or a percentage of the total number+    // of DaemonSet pods at the start of the update (ex: 10%). The absolute number is calculated from+    // the percentage by rounding up. This cannot be 0. The default value is 1. Example: when this is+    // set to 30%, at most 30% of the total number of nodes that should be running the daemon pod+    // (i.e. status.desiredNumberScheduled) can have 2 pods running at any given time. The update+    // starts by starting replacements for at most 30% of those DaemonSet pods. Once the new pods are+    // available it then stops the existing pods before proceeding onto other DaemonSet pods, thus+    // ensuring that at most 130% of the desired final number of DaemonSet  pods are running at all+    // times during the update.+    // +optional+    MaxSurge *intstr.IntOrString `json:"maxSurge,omitempty" protobuf:"bytes,7,opt,name=maxSurge"`}
type DaemonSetSpec struct {    // ...
+    // BurstReplicas is a rate limiter for booting pods on a lot of pods.+    // The default value is 250+    BurstReplicas *intstr.IntOrString `json:"burstReplicas,omitempty" protobuf:"bytes,5,opt,name=burstReplicas"`}

apiVersion: apps.kruise.io/v1alpha1kind: DaemonSetspec:  # ...  updateStrategy:    type: RollingUpdate    rollingUpdate:      selector:        matchLabels:          nodeType: canary

apiVersion: apps.kruise.io/v1alpha1kind: DaemonSetspec:  # ...  updateStrategy:    type: RollingUpdate    rollingUpdate:      partition: 100

apiVersion: apps.kruise.io/v1alpha1kind: DaemonSetspec:  # ...  updateStrategy:    type: RollingUpdate    rollingUpdate:      maxUnavailable: 5      partition: 100      selector:        matchLabels:          nodeType: canary

apiVersion: apps.kruise.io/v1alpha1kind: DaemonSetspec:  # ...  updateStrategy:    rollingUpdate:      type: Surging  # defaults to Standard      maxSurge: 30%

apiVersion: apps.kruise.io/v1alpha1kind: DaemonSetspec:  # ...  updateStrategy:    rollingUpdate:      paused: true