meta_proxier.go

Documentation: k8s.io/kubernetes/pkg/proxy/metaproxier

     1  /*
     2  Copyright 2019 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package metaproxier
    18  
    19  import (
    20  	v1 "k8s.io/api/core/v1"
    21  	discovery "k8s.io/api/discovery/v1"
    22  	"k8s.io/klog/v2"
    23  	"k8s.io/kubernetes/pkg/proxy"
    24  	"k8s.io/kubernetes/pkg/proxy/config"
    25  )
    26  
    27  type metaProxier struct {
    28  	// actual, wrapped
    29  	ipv4Proxier proxy.Provider
    30  	// actual, wrapped
    31  	ipv6Proxier proxy.Provider
    32  	// TODO(imroc): implement node handler for meta proxier.
    33  	config.NoopNodeHandler
    34  }
    35  
    36  // NewMetaProxier returns a dual-stack "meta-proxier". Proxier API
    37  // calls will be dispatched to the ProxyProvider instances depending
    38  // on address family.
    39  func NewMetaProxier(ipv4Proxier, ipv6Proxier proxy.Provider) proxy.Provider {
    40  	return proxy.Provider(&metaProxier{
    41  		ipv4Proxier: ipv4Proxier,
    42  		ipv6Proxier: ipv6Proxier,
    43  	})
    44  }
    45  
    46  // Sync immediately synchronizes the ProxyProvider's current state to
    47  // proxy rules.
    48  func (proxier *metaProxier) Sync() {
    49  	proxier.ipv4Proxier.Sync()
    50  	proxier.ipv6Proxier.Sync()
    51  }
    52  
    53  // SyncLoop runs periodic work.  This is expected to run as a
    54  // goroutine or as the main loop of the app.  It does not return.
    55  func (proxier *metaProxier) SyncLoop() {
    56  	go proxier.ipv6Proxier.SyncLoop() // Use go-routine here!
    57  	proxier.ipv4Proxier.SyncLoop()    // never returns
    58  }
    59  
    60  // OnServiceAdd is called whenever creation of new service object is observed.
    61  func (proxier *metaProxier) OnServiceAdd(service *v1.Service) {
    62  	proxier.ipv4Proxier.OnServiceAdd(service)
    63  	proxier.ipv6Proxier.OnServiceAdd(service)
    64  }
    65  
    66  // OnServiceUpdate is called whenever modification of an existing
    67  // service object is observed.
    68  func (proxier *metaProxier) OnServiceUpdate(oldService, service *v1.Service) {
    69  	proxier.ipv4Proxier.OnServiceUpdate(oldService, service)
    70  	proxier.ipv6Proxier.OnServiceUpdate(oldService, service)
    71  }
    72  
    73  // OnServiceDelete is called whenever deletion of an existing service
    74  // object is observed.
    75  func (proxier *metaProxier) OnServiceDelete(service *v1.Service) {
    76  	proxier.ipv4Proxier.OnServiceDelete(service)
    77  	proxier.ipv6Proxier.OnServiceDelete(service)
    78  
    79  }
    80  
    81  // OnServiceSynced is called once all the initial event handlers were
    82  // called and the state is fully propagated to local cache.
    83  func (proxier *metaProxier) OnServiceSynced() {
    84  	proxier.ipv4Proxier.OnServiceSynced()
    85  	proxier.ipv6Proxier.OnServiceSynced()
    86  }
    87  
    88  // OnEndpointSliceAdd is called whenever creation of a new endpoint slice object
    89  // is observed.
    90  func (proxier *metaProxier) OnEndpointSliceAdd(endpointSlice *discovery.EndpointSlice) {
    91  	switch endpointSlice.AddressType {
    92  	case discovery.AddressTypeIPv4:
    93  		proxier.ipv4Proxier.OnEndpointSliceAdd(endpointSlice)
    94  	case discovery.AddressTypeIPv6:
    95  		proxier.ipv6Proxier.OnEndpointSliceAdd(endpointSlice)
    96  	default:
    97  		klog.ErrorS(nil, "EndpointSlice address type not supported", "addressType", endpointSlice.AddressType)
    98  	}
    99  }
   100  
   101  // OnEndpointSliceUpdate is called whenever modification of an existing endpoint
   102  // slice object is observed.
   103  func (proxier *metaProxier) OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice *discovery.EndpointSlice) {
   104  	switch newEndpointSlice.AddressType {
   105  	case discovery.AddressTypeIPv4:
   106  		proxier.ipv4Proxier.OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice)
   107  	case discovery.AddressTypeIPv6:
   108  		proxier.ipv6Proxier.OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice)
   109  	default:
   110  		klog.ErrorS(nil, "EndpointSlice address type not supported", "addressType", newEndpointSlice.AddressType)
   111  	}
   112  }
   113  
   114  // OnEndpointSliceDelete is called whenever deletion of an existing endpoint slice
   115  // object is observed.
   116  func (proxier *metaProxier) OnEndpointSliceDelete(endpointSlice *discovery.EndpointSlice) {
   117  	switch endpointSlice.AddressType {
   118  	case discovery.AddressTypeIPv4:
   119  		proxier.ipv4Proxier.OnEndpointSliceDelete(endpointSlice)
   120  	case discovery.AddressTypeIPv6:
   121  		proxier.ipv6Proxier.OnEndpointSliceDelete(endpointSlice)
   122  	default:
   123  		klog.ErrorS(nil, "EndpointSlice address type not supported", "addressType", endpointSlice.AddressType)
   124  	}
   125  }
   126  
   127  // OnEndpointSlicesSynced is called once all the initial event handlers were
   128  // called and the state is fully propagated to local cache.
   129  func (proxier *metaProxier) OnEndpointSlicesSynced() {
   130  	proxier.ipv4Proxier.OnEndpointSlicesSynced()
   131  	proxier.ipv6Proxier.OnEndpointSlicesSynced()
   132  }
   133  
   134  // OnNodeAdd is called whenever creation of new node object is observed.
   135  func (proxier *metaProxier) OnNodeAdd(node *v1.Node) {
   136  	proxier.ipv4Proxier.OnNodeAdd(node)
   137  	proxier.ipv6Proxier.OnNodeAdd(node)
   138  }
   139  
   140  // OnNodeUpdate is called whenever modification of an existing
   141  // node object is observed.
   142  func (proxier *metaProxier) OnNodeUpdate(oldNode, node *v1.Node) {
   143  	proxier.ipv4Proxier.OnNodeUpdate(oldNode, node)
   144  	proxier.ipv6Proxier.OnNodeUpdate(oldNode, node)
   145  }
   146  
   147  // OnNodeDelete is called whenever deletion of an existing node
   148  // object is observed.
   149  func (proxier *metaProxier) OnNodeDelete(node *v1.Node) {
   150  	proxier.ipv4Proxier.OnNodeDelete(node)
   151  	proxier.ipv6Proxier.OnNodeDelete(node)
   152  
   153  }
   154  
   155  // OnNodeSynced is called once all the initial event handlers were
   156  // called and the state is fully propagated to local cache.
   157  func (proxier *metaProxier) OnNodeSynced() {
   158  	proxier.ipv4Proxier.OnNodeSynced()
   159  	proxier.ipv6Proxier.OnNodeSynced()
   160  }
   161  
   162  // OnServiceCIDRsChanged is called whenever a change is observed
   163  // in any of the ServiceCIDRs, and provides complete list of service cidrs.
   164  func (proxier *metaProxier) OnServiceCIDRsChanged(cidrs []string) {
   165  	proxier.ipv4Proxier.OnServiceCIDRsChanged(cidrs)
   166  	proxier.ipv6Proxier.OnServiceCIDRsChanged(cidrs)
   167  }
   168
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