forked from Azure/azure-container-networking
/
namespace.go
189 lines (155 loc) · 5.67 KB
/
namespace.go
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// 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/ipsm"
"github.com/Azure/azure-container-networking/npm/iptm"
"github.com/Azure/azure-container-networking/npm/util"
"k8s.io/apimachinery/pkg/types"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
)
type namespace struct {
name string
setMap map[string]string
podMap map[types.UID]*corev1.Pod
npMap map[string]*networkingv1.NetworkPolicy
ipsMgr *ipsm.IpsetManager
iptMgr *iptm.IptablesManager
}
// newNS constructs a new namespace object.
func newNs(name string) (*namespace, error) {
ns := &namespace{
name: name,
setMap: make(map[string]string),
podMap: make(map[types.UID]*corev1.Pod),
npMap: make(map[string]*networkingv1.NetworkPolicy),
ipsMgr: ipsm.NewIpsetManager(),
iptMgr: iptm.NewIptablesManager(),
}
return ns, nil
}
func isSystemNs(nsObj *corev1.Namespace) bool {
return nsObj.ObjectMeta.Name == util.KubeSystemFlag
}
// InitAllNsList syncs all-namespace ipset list.
func (npMgr *NetworkPolicyManager) InitAllNsList() error {
allNs := npMgr.nsMap[util.KubeAllNamespacesFlag]
for nsName := range npMgr.nsMap {
if nsName == util.KubeAllNamespacesFlag {
continue
}
if err := allNs.ipsMgr.AddToList(util.KubeAllNamespacesFlag, nsName); err != nil {
log.Errorf("Error: failed to add namespace set %s to list %s", nsName, util.KubeAllNamespacesFlag)
return err
}
}
return nil
}
// UninitAllNsList cleans all-namespace ipset list.
func (npMgr *NetworkPolicyManager) UninitAllNsList() error {
allNs := npMgr.nsMap[util.KubeAllNamespacesFlag]
for nsName := range npMgr.nsMap {
if nsName == util.KubeAllNamespacesFlag {
continue
}
if err := allNs.ipsMgr.DeleteFromList(util.KubeAllNamespacesFlag, nsName); err != nil {
log.Errorf("Error: failed to delete namespace set %s from list %s", nsName, util.KubeAllNamespacesFlag)
return err
}
}
return nil
}
// AddNamespace handles adding namespace to ipset.
func (npMgr *NetworkPolicyManager) AddNamespace(nsObj *corev1.Namespace) error {
npMgr.Lock()
defer npMgr.Unlock()
var err error
nsName, nsNs, nsLabel := nsObj.ObjectMeta.Name, nsObj.ObjectMeta.Namespace, nsObj.ObjectMeta.Labels
log.Printf("NAMESPACE CREATING: [%s/%s/%+v]", nsName, nsNs, nsLabel)
ipsMgr := npMgr.nsMap[util.KubeAllNamespacesFlag].ipsMgr
// Create ipset for the namespace.
if err = ipsMgr.CreateSet(nsName); err != nil {
log.Errorf("Error: failed to create ipset for namespace %s.", nsName)
return err
}
if err = ipsMgr.AddToList(util.KubeAllNamespacesFlag, nsName); err != nil {
log.Errorf("Error: failed to add %s to all-namespace ipset list.", nsName)
return err
}
// Add the namespace to its label's ipset list.
var labelKeys []string
nsLabels := nsObj.ObjectMeta.Labels
for nsLabelKey, nsLabelVal := range nsLabels {
labelKey := util.GetNsIpsetName(nsLabelKey, nsLabelVal)
log.Printf("Adding namespace %s to ipset list %s", nsName, labelKey)
if err = ipsMgr.AddToList(labelKey, nsName); err != nil {
log.Errorf("Error: failed to add namespace %s to ipset list %s", nsName, labelKey)
return err
}
labelKeys = append(labelKeys, labelKey)
}
ns, err := newNs(nsName)
if err != nil {
log.Errorf("Error: failed to create namespace %s", nsName)
}
npMgr.nsMap[nsName] = ns
return nil
}
// UpdateNamespace handles updating namespace in ipset.
func (npMgr *NetworkPolicyManager) UpdateNamespace(oldNsObj *corev1.Namespace, newNsObj *corev1.Namespace) error {
var err error
oldNsName, oldNsNs, oldNsLabel := oldNsObj.ObjectMeta.Name, oldNsObj.ObjectMeta.Namespace, oldNsObj.ObjectMeta.Labels
newNsName, newNsNs, newNsLabel := newNsObj.ObjectMeta.Name, newNsObj.ObjectMeta.Namespace, newNsObj.ObjectMeta.Labels
log.Printf(
"NAMESPACE UPDATING:\n old namespace: [%s/%s/%+v]\n new namespace: [%s/%s/%+v]",
oldNsName, oldNsNs, oldNsLabel, newNsName, newNsNs, newNsLabel,
)
if err = npMgr.DeleteNamespace(oldNsObj); err != nil {
return err
}
if newNsObj.ObjectMeta.DeletionTimestamp == nil && newNsObj.ObjectMeta.DeletionGracePeriodSeconds == nil {
if err = npMgr.AddNamespace(newNsObj); err != nil {
return err
}
}
return nil
}
// DeleteNamespace handles deleting namespace from ipset.
func (npMgr *NetworkPolicyManager) DeleteNamespace(nsObj *corev1.Namespace) error {
npMgr.Lock()
defer npMgr.Unlock()
var err error
nsName, nsNs, nsLabel := nsObj.ObjectMeta.Name, nsObj.ObjectMeta.Namespace, nsObj.ObjectMeta.Labels
log.Printf("NAMESPACE DELETING: [%s/%s/%+v]", nsName, nsNs, nsLabel)
_, exists := npMgr.nsMap[nsName]
if !exists {
return nil
}
// Delete the namespace from its label's ipset list.
ipsMgr := npMgr.nsMap[util.KubeAllNamespacesFlag].ipsMgr
var labelKeys []string
nsLabels := nsObj.ObjectMeta.Labels
for nsLabelKey, nsLabelVal := range nsLabels {
labelKey := util.GetNsIpsetName(nsLabelKey, nsLabelVal)
log.Printf("Deleting namespace %s from ipset list %s", nsName, labelKey)
if err = ipsMgr.DeleteFromList(labelKey, nsName); err != nil {
log.Errorf("Error: failed to delete namespace %s from ipset list %s", nsName, labelKey)
return err
}
labelKeys = append(labelKeys, labelKey)
}
// Delete the namespace from all-namespace ipset list.
if err = ipsMgr.DeleteFromList(util.KubeAllNamespacesFlag, nsName); err != nil {
log.Errorf("Error: failed to delete namespace %s from ipset list %s", nsName, util.KubeAllNamespacesFlag)
return err
}
// Delete ipset for the namespace.
if err = ipsMgr.DeleteSet(nsName); err != nil {
log.Errorf("Error: failed to delete ipset for namespace %s.", nsName)
return err
}
delete(npMgr.nsMap, nsName)
return nil
}