forked from Azure/azure-container-networking
-
Notifications
You must be signed in to change notification settings - Fork 0
/
nwpolicy.go
155 lines (120 loc) · 3.91 KB
/
nwpolicy.go
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
// Copyright 2018 Microsoft. All rights reserved.
// MIT License
package npm
import (
"github.com/Azure/azure-container-networking/log"
"github.com/Azure/azure-container-networking/npm/util"
networkingv1 "k8s.io/api/networking/v1"
)
// AddNetworkPolicy handles adding network policy to iptables.
func (npMgr *NetworkPolicyManager) AddNetworkPolicy(npObj *networkingv1.NetworkPolicy) error {
npMgr.Lock()
defer npMgr.Unlock()
var err error
defer func() {
if err = npMgr.UpdateAndSendReport(err, util.AddNetworkPolicyEvent); err != nil {
log.Printf("Error sending NPM telemetry report")
}
}()
npNs, npName := npObj.ObjectMeta.Namespace, npObj.ObjectMeta.Name
log.Printf("NETWORK POLICY CREATING: %s/%s\n", npNs, npName)
allNs := npMgr.nsMap[util.KubeAllNamespacesFlag]
if !npMgr.isAzureNpmChainCreated {
if err = allNs.ipsMgr.CreateSet(util.KubeSystemFlag); err != nil {
log.Printf("Error initialize kube-system ipset.\n")
return err
}
if err = allNs.iptMgr.InitNpmChains(); err != nil {
log.Printf("Error initialize azure-npm chains.\n")
return err
}
npMgr.isAzureNpmChainCreated = true
}
podSets, nsLists, iptEntries := parsePolicy(npObj)
ipsMgr := allNs.ipsMgr
for _, set := range podSets {
if err = ipsMgr.CreateSet(set); err != nil {
log.Printf("Error creating ipset %s-%s\n", npNs, set)
return err
}
}
for _, list := range nsLists {
if err = ipsMgr.CreateList(list); err != nil {
log.Printf("Error creating ipset list %s-%s\n", npNs, list)
return err
}
}
if err = npMgr.InitAllNsList(); err != nil {
log.Printf("Error initializing all-namespace ipset list.\n")
return err
}
iptMgr := allNs.iptMgr
for _, iptEntry := range iptEntries {
if err = iptMgr.Add(iptEntry); err != nil {
log.Printf("Error applying iptables rule\n. Rule: %+v", iptEntry)
return err
}
}
allNs.npMap[npName] = npObj
npMgr.clusterState.NwPolicyCount++
ns, err := newNs(npNs)
if err != nil {
log.Printf("Error creating namespace %s\n", npNs)
}
npMgr.nsMap[npNs] = ns
return nil
}
// UpdateNetworkPolicy handles updateing network policy in iptables.
func (npMgr *NetworkPolicyManager) UpdateNetworkPolicy(oldNpObj *networkingv1.NetworkPolicy, newNpObj *networkingv1.NetworkPolicy) error {
var err error
defer func() {
npMgr.Lock()
if err = npMgr.UpdateAndSendReport(err, util.UpdateNetworkPolicyEvent); err != nil {
log.Printf("Error sending NPM telemetry report")
}
npMgr.Unlock()
}()
oldNpNs, oldNpName := oldNpObj.ObjectMeta.Namespace, oldNpObj.ObjectMeta.Name
log.Printf("NETWORK POLICY UPDATING: %s/%s\n", oldNpNs, oldNpName)
if err = npMgr.DeleteNetworkPolicy(oldNpObj); err != nil {
return err
}
if newNpObj.ObjectMeta.DeletionTimestamp == nil && newNpObj.ObjectMeta.DeletionGracePeriodSeconds == nil {
if err = npMgr.AddNetworkPolicy(newNpObj); err != nil {
return err
}
}
return nil
}
// DeleteNetworkPolicy handles deleting network policy from iptables.
func (npMgr *NetworkPolicyManager) DeleteNetworkPolicy(npObj *networkingv1.NetworkPolicy) error {
npMgr.Lock()
defer npMgr.Unlock()
var err error
defer func() {
if err = npMgr.UpdateAndSendReport(err, util.DeleteNetworkPolicyEvent); err != nil {
log.Printf("Error sending NPM telemetry report")
}
}()
npNs, npName := npObj.ObjectMeta.Namespace, npObj.ObjectMeta.Name
log.Printf("NETWORK POLICY DELETING: %s/%s\n", npNs, npName)
allNs := npMgr.nsMap[util.KubeAllNamespacesFlag]
_, _, iptEntries := parsePolicy(npObj)
iptMgr := allNs.iptMgr
for _, iptEntry := range iptEntries {
if err = iptMgr.Delete(iptEntry); err != nil {
log.Printf("Error applying iptables rule.\n Rule: %+v", iptEntry)
return err
}
}
delete(allNs.npMap, npName)
npMgr.clusterState.NwPolicyCount--
if len(allNs.npMap) == 0 {
if err = iptMgr.UninitNpmChains(); err != nil {
log.Printf("Error uninitialize azure-npm chains.\n")
return err
}
npMgr.isAzureNpmChainCreated = false
}
return nil
}