| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package workloadinstances |
| |
| import ( |
| "strings" |
| ) |
| |
| import ( |
| "k8s.io/apimachinery/pkg/types" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pilot/pkg/model" |
| "github.com/apache/dubbo-go-pixiu/pilot/pkg/util/slices" |
| ) |
| |
| // FindInstance returns the first workload instance matching given predicate. |
| func FindInstance(instances []*model.WorkloadInstance, predicate func(*model.WorkloadInstance) bool) *model.WorkloadInstance { |
| for _, instance := range instances { |
| if predicate(instance) { |
| return instance |
| } |
| } |
| return nil |
| } |
| |
| // InstanceNameForProxy returns a name of the workload instance that |
| // corresponds to a given proxy, if any. |
| func InstanceNameForProxy(proxy *model.Proxy) types.NamespacedName { |
| parts := strings.Split(proxy.ID, ".") |
| if len(parts) == 2 && proxy.ConfigNamespace == parts[1] { |
| return types.NamespacedName{Name: parts[0], Namespace: parts[1]} |
| } |
| return types.NamespacedName{} |
| } |
| |
| // GetInstanceForProxy returns a workload instance that |
| // corresponds to a given proxy, if any. |
| func GetInstanceForProxy(index Index, proxy *model.Proxy, proxyIP string) *model.WorkloadInstance { |
| if !slices.ContainsString(proxy.IPAddresses, proxyIP) { |
| return nil |
| } |
| instances := index.GetByIP(proxyIP) // list is ordered by namespace/name |
| if len(instances) == 0 { |
| return nil |
| } |
| if len(instances) == 1 { // dominant use case |
| // NOTE: for the sake of backwards compatibility, we don't enforce |
| // instance.Namespace == proxy.ConfigNamespace |
| return instances[0] |
| } |
| |
| // try to find workload instance with the same name as proxy |
| proxyName := InstanceNameForProxy(proxy) |
| if proxyName != (types.NamespacedName{}) { |
| instance := FindInstance(instances, func(wi *model.WorkloadInstance) bool { |
| return wi.Name == proxyName.Name && wi.Namespace == proxyName.Namespace |
| }) |
| if instance != nil { |
| return instance |
| } |
| } |
| |
| // try to find workload instance in the same namespace as proxy |
| instance := FindInstance(instances, func(wi *model.WorkloadInstance) bool { |
| // TODO: take auto-registration group into account once it's included into workload instance |
| return wi.Namespace == proxy.ConfigNamespace |
| }) |
| if instance != nil { |
| return instance |
| } |
| |
| // fall back to choosing one of the workload instances |
| |
| // NOTE: for the sake of backwards compatibility, we don't enforce |
| // instance.Namespace == proxy.ConfigNamespace |
| return instances[0] |
| } |