1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// Copyright 2015 CNI 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 main
import (
"fmt"
"net"
"strings"
bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/disk"
"github.com/containernetworking/cni/pkg/skel"
"github.com/containernetworking/cni/pkg/types"
"github.com/containernetworking/cni/pkg/types/current"
"github.com/containernetworking/cni/pkg/version"
)
func main() {
skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.All, bv.BuildString("host-local"))
}
func cmdCheck(args *skel.CmdArgs) error {
ipamConf, _, err := allocator.LoadIPAMConfig(args.StdinData, args.Args)
if err != nil {
return err
}
// Look to see if there is at least one IP address allocated to the container
// in the data dir, irrespective of what that address actually is
store, err := disk.New(ipamConf.Name, ipamConf.DataDir)
if err != nil {
return err
}
defer store.Close()
containerIpFound := store.FindByID(args.ContainerID, args.IfName)
if containerIpFound == false {
return fmt.Errorf("host-local: Failed to find address added by container %v", args.ContainerID)
}
return nil
}
func cmdAdd(args *skel.CmdArgs) error {
ipamConf, confVersion, err := allocator.LoadIPAMConfig(args.StdinData, args.Args)
if err != nil {
return err
}
result := ¤t.Result{}
if ipamConf.ResolvConf != "" {
dns, err := parseResolvConf(ipamConf.ResolvConf)
if err != nil {
return err
}
result.DNS = *dns
}
store, err := disk.New(ipamConf.Name, ipamConf.DataDir)
if err != nil {
return err
}
defer store.Close()
// Keep the allocators we used, so we can release all IPs if an error
// occurs after we start allocating
allocs := []*allocator.IPAllocator{}
// Store all requested IPs in a map, so we can easily remove ones we use
// and error if some remain
requestedIPs := map[string]net.IP{} //net.IP cannot be a key
for _, ip := range ipamConf.IPArgs {
requestedIPs[ip.String()] = ip
}
for idx, rangeset := range ipamConf.Ranges {
allocator := allocator.NewIPAllocator(&rangeset, store, idx)
// Check to see if there are any custom IPs requested in this range.
var requestedIP net.IP
for k, ip := range requestedIPs {
if rangeset.Contains(ip) {
requestedIP = ip
delete(requestedIPs, k)
break
}
}
ipConf, err := allocator.Get(args.ContainerID, args.IfName, requestedIP)
if err != nil {
// Deallocate all already allocated IPs
for _, alloc := range allocs {
_ = alloc.Release(args.ContainerID, args.IfName)
}
return fmt.Errorf("failed to allocate for range %d: %v", idx, err)
}
allocs = append(allocs, allocator)
result.IPs = append(result.IPs, ipConf)
}
// If an IP was requested that wasn't fulfilled, fail
if len(requestedIPs) != 0 {
for _, alloc := range allocs {
_ = alloc.Release(args.ContainerID, args.IfName)
}
errstr := "failed to allocate all requested IPs:"
for _, ip := range requestedIPs {
errstr = errstr + " " + ip.String()
}
return fmt.Errorf(errstr)
}
result.Routes = ipamConf.Routes
return types.PrintResult(result, confVersion)
}
func cmdDel(args *skel.CmdArgs) error {
ipamConf, _, err := allocator.LoadIPAMConfig(args.StdinData, args.Args)
if err != nil {
return err
}
store, err := disk.New(ipamConf.Name, ipamConf.DataDir)
if err != nil {
return err
}
defer store.Close()
// Loop through all ranges, releasing all IPs, even if an error occurs
var errors []string
for idx, rangeset := range ipamConf.Ranges {
ipAllocator := allocator.NewIPAllocator(&rangeset, store, idx)
err := ipAllocator.Release(args.ContainerID, args.IfName)
if err != nil {
errors = append(errors, err.Error())
}
}
if errors != nil {
return fmt.Errorf(strings.Join(errors, ";"))
}
return nil
}
|
