github.com/looshlee/cilium@v1.6.12/plugins/cilium-cni/types/types.go (about)

     1  // Copyright 2016-2019 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 types
    16  
    17  import (
    18  	"encoding/json"
    19  	"fmt"
    20  	"io/ioutil"
    21  	"net"
    22  
    23  	ciliumv2 "github.com/cilium/cilium/pkg/k8s/apis/cilium.io/v2"
    24  
    25  	cniTypes "github.com/containernetworking/cni/pkg/types"
    26  	"github.com/containernetworking/cni/pkg/types/current"
    27  	"github.com/containernetworking/cni/pkg/version"
    28  )
    29  
    30  // NetConf is the Cilium specific CNI network configuration
    31  type NetConf struct {
    32  	cniTypes.NetConf
    33  	MTU  int              `json:"mtu"`
    34  	Args Args             `json:"args"`
    35  	ENI  ciliumv2.ENISpec `json:"eni,omitempty"`
    36  }
    37  
    38  // NetConfList is a CNI chaining configuration
    39  type NetConfList struct {
    40  	Plugins []*NetConf `json:"plugins,omitempty"`
    41  }
    42  
    43  func parsePrevResult(n *NetConf) (*NetConf, error) {
    44  	if n.RawPrevResult != nil {
    45  		resultBytes, err := json.Marshal(n.RawPrevResult)
    46  		if err != nil {
    47  			return nil, fmt.Errorf("could not serialize prevResult: %v", err)
    48  		}
    49  		res, err := version.NewResult(n.CNIVersion, resultBytes)
    50  		if err != nil {
    51  			return nil, fmt.Errorf("could not parse prevResult: %v", err)
    52  		}
    53  		n.PrevResult, err = current.NewResultFromResult(res)
    54  		if err != nil {
    55  			return nil, fmt.Errorf("could not convert result to current version: %v", err)
    56  		}
    57  	}
    58  
    59  	return n, nil
    60  }
    61  
    62  // ReadNetConf reads a CNI configuration file and returns the corresponding
    63  // NetConf structure
    64  func ReadNetConf(path string) (*NetConf, error) {
    65  	b, err := ioutil.ReadFile(path)
    66  	if err != nil {
    67  		return nil, fmt.Errorf("Unable to read CNI configuration '%s': %s", path, err)
    68  	}
    69  
    70  	netConfList := &NetConfList{}
    71  	if err := json.Unmarshal(b, netConfList); err == nil {
    72  		for _, plugin := range netConfList.Plugins {
    73  			if plugin.Type == "cilium-cni" {
    74  				return parsePrevResult(plugin)
    75  			}
    76  		}
    77  	}
    78  
    79  	return LoadNetConf(b)
    80  }
    81  
    82  // LoadNetConf unmarshals a Cilium network configuration from JSON and returns
    83  // a NetConf together with the CNI version
    84  func LoadNetConf(bytes []byte) (*NetConf, error) {
    85  	n := &NetConf{}
    86  	if err := json.Unmarshal(bytes, n); err != nil {
    87  		return nil, fmt.Errorf("failed to load netconf: %s", err)
    88  	}
    89  
    90  	return parsePrevResult(n)
    91  
    92  }
    93  
    94  // ArgsSpec is the specification of additional arguments of the CNI ADD call
    95  type ArgsSpec struct {
    96  	cniTypes.CommonArgs
    97  	IP                         net.IP
    98  	K8S_POD_NAME               cniTypes.UnmarshallableString
    99  	K8S_POD_NAMESPACE          cniTypes.UnmarshallableString
   100  	K8S_POD_INFRA_CONTAINER_ID cniTypes.UnmarshallableString
   101  }
   102  
   103  // Args contains arbitrary information a scheduler
   104  // can pass to the cni plugin
   105  type Args struct {
   106  	Mesos Mesos `json:"org.apache.mesos,omitempty"`
   107  }
   108  
   109  // Mesos contains network-specific information from the scheduler to the cni plugin
   110  type Mesos struct {
   111  	NetworkInfo NetworkInfo `json:"network_info"`
   112  }
   113  
   114  // NetworkInfo supports passing only labels from mesos
   115  type NetworkInfo struct {
   116  	Name   string `json:"name"`
   117  	Labels struct {
   118  		Labels []struct {
   119  			Key   string `json:"key"`
   120  			Value string `json:"value"`
   121  		} `json:"labels,omitempty"`
   122  	} `json:"labels,omitempty"`
   123  }