github.com/imran-kn/cilium-fork@v1.6.9/pkg/policy/groups/controllers.go (about)

     1  // Copyright 2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package groups
    16  
    17  import (
    18  	cilium_v2 "github.com/cilium/cilium/pkg/k8s/apis/cilium.io/v2"
    19  )
    20  
    21  const (
    22  	maxConcurrentUpdates = 4
    23  )
    24  
    25  // UpdateCNPInformation  retrieves all the CNP that has currently a derivative
    26  // policy and creates the new derivatives policies with the latest information
    27  // from providers.  To avoid issues with rate-limiting this function will
    28  // execute the addDerivative function with a max number of concurrent calls,
    29  // defined on maxConcurrentUpdates.
    30  func UpdateCNPInformation() {
    31  
    32  	cnpToUpdate := groupsCNPCache.GetAllCNP()
    33  	sem := make(chan bool, maxConcurrentUpdates)
    34  	for _, cnp := range cnpToUpdate {
    35  		sem <- true
    36  		go func(cnp *cilium_v2.CiliumNetworkPolicy) {
    37  			defer func() { <-sem }()
    38  			addDerivativeCNP(cnp)
    39  
    40  		}(cnp)
    41  	}
    42  }