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label.go
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label.go
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package label
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
)
const (
// The following labels are recommended by kubernetes https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/
// NameLabelKey is Kubernetes recommended label key, it represents the name of the application
// It should always be redis-cluster in our case.
NameLabelKey string = "app.kubernetes.io/name"
// InstanceLabelKey is Kubernetes recommended label key, it represents a unique name identifying the instance of an application
// It's the cluster name in our case
InstanceLabelKey string = "app.kubernetes.io/instance"
// ComponentLabelKey is Kubernetes recommended label key, it represents the component within the architecture
ComponentLabelKey string = "app.kubernetes.io/component"
// ManagedByLabelKey is Kubernetes recommended label key, it represents the tool being used to manage the operation of an application
// For resources managed by Redis Operator, its value is always redis-operator
ManagedByLabelKey string = "app.kubernetes.io/managed-by"
// NamespaceLabelKey is label key used in PV for easy querying
NamespaceLabelKey string = "app.kubernetes.io/namespace"
// AnnPodNameKey is pod name annotation key used in PV/PVC for synchronizing redis cluster meta info
AnnPodNameKey string = "anywhy.github.io/pod-name"
// ClusterGroupIDLabelKey is pod name annotation key used for redis cluster group synchronizing redis cluster meta info
ClusterGroupIDLabelKey string = "anywhy.github.io/cluster-group-id"
// ClusterModeLabelKey is redis cluster mode
ClusterModeLabelKey string = "anywhy.github.io/cluster-mode"
// ClusterNodeRoleLabelKey is redis node role
ClusterNodeRoleLabelKey string = "anywhy.github.io/node-role"
// MasterNodeLabelKey redis master role label key
MasterNodeLabelKey string = "master"
// SlaveNodeLabelKey redis slave role label key
SlaveNodeLabelKey string = "slave"
// RedisLabelKey redis component label key
RedisLabelKey string = "redis"
// SentinelLabelKey redis sentinel component label key
SentinelLabelKey string = "sentinel"
// ReplicaClusterLabelKey means that redis cluster is master/slave
ReplicaClusterLabelKey string = "replica"
// RedisClusterLabelKey means redis cluster is shard mode
RedisClusterLabelKey string = "cluster"
)
// Label is the label field in metadatas
type Label map[string]string
// New init a new Label for redis-opertator
func New() Label {
return Label{
NameLabelKey: "redis-cluster",
ManagedByLabelKey: "redis-operator",
}
}
// Namespace adds namespace kv pair to label
func (l Label) Namespace(name string) Label {
l[NamespaceLabelKey] = name
return l
}
// Instance adds redis cluster kv pair to label
func (l Label) Instance(name string) Label {
l[InstanceLabelKey] = name
return l
}
// Component adds redis component kv pair to label
func (l Label) Component(name string) Label {
l[ComponentLabelKey] = name
return l
}
// ClusterMode add redis mode kv pair to label
func (l Label) ClusterMode(mode string) Label {
l[ClusterModeLabelKey] = mode
return l
}
// ReplicaMode replica cluster
func (l Label) ReplicaMode() Label {
return l.ClusterMode(ReplicaClusterLabelKey)
}
// RedisClusterMode redis cluster
func (l Label) RedisClusterMode() Label {
return l.ClusterMode(RedisClusterLabelKey)
}
// ClusterModeType return cluster mode
func (l Label) ClusterModeType() string {
return l[ClusterModeLabelKey]
}
// ComponentType returns component type
func (l Label) ComponentType() string {
return l[ComponentLabelKey]
}
// Group add redis cluster group id kv pair to label
func (l Label) Group(groupID string) Label {
l[ClusterGroupIDLabelKey] = groupID
return l
}
// GetGroup get redis cluster grop id
func (l Label) GetGroup() string {
return l[ClusterGroupIDLabelKey]
}
// Master label assigned redis master
func (l Label) Master() Label {
l[ClusterNodeRoleLabelKey] = MasterNodeLabelKey
return l
}
// IsMaster label role is master
func (l Label) IsMaster() bool {
return l[ClusterNodeRoleLabelKey] == MasterNodeLabelKey
}
// Redis label assigned redis sentinel
func (l Label) Redis() Label {
l[ComponentLabelKey] = RedisLabelKey
return l
}
// Sentinel label assigned redis sentinel
func (l Label) Sentinel() Label {
l[ComponentLabelKey] = SentinelLabelKey
return l
}
// IsSentinel label componet is sentinel
func (l Label) IsSentinel() bool {
return l[ComponentLabelKey] == SentinelLabelKey
}
// Slave label assigned redis slave
func (l Label) Slave() Label {
l[ClusterNodeRoleLabelKey] = SlaveNodeLabelKey
return l
}
// IsSlave label role is slave
func (l Label) IsSlave() bool {
return l[ClusterNodeRoleLabelKey] == ClusterNodeRoleLabelKey
}
// ClusterListOptions returns a cluster ListOptions filter
func ClusterListOptions(instanceName string) metav1.ListOptions {
return metav1.ListOptions{
LabelSelector: labels.SelectorFromSet(
New().Instance(instanceName).Labels(),
).String(),
}
}
// Selector gets labels.Selector from label
func (l Label) Selector() (labels.Selector, error) {
return metav1.LabelSelectorAsSelector(l.LabelSelector())
}
// LabelSelector gets LabelSelector from label
func (l Label) LabelSelector() *metav1.LabelSelector {
return &metav1.LabelSelector{MatchLabels: l}
}
// Labels converts label to map[string]string
func (l Label) Labels() map[string]string {
return l
}