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multitenant.go
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multitenant.go
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package plugin
import (
"sync"
"github.com/golang/glog"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
kapi "k8s.io/kubernetes/pkg/api"
osapi "github.com/openshift/origin/pkg/sdn/apis/network"
)
type multiTenantPlugin struct {
node *OsdnNode
vnids *nodeVNIDMap
vnidInUseLock sync.Mutex
vnidInUse map[uint32]bool
}
func NewMultiTenantPlugin() osdnPolicy {
return &multiTenantPlugin{
vnidInUse: make(map[uint32]bool),
}
}
func (mp *multiTenantPlugin) Name() string {
return osapi.MultiTenantPluginName
}
func (mp *multiTenantPlugin) Start(node *OsdnNode) error {
mp.node = node
mp.vnids = newNodeVNIDMap(mp, node.osClient)
if err := mp.vnids.Start(); err != nil {
return err
}
otx := node.oc.NewTransaction()
otx.AddFlow("table=80, priority=200, reg0=0, actions=output:NXM_NX_REG2[]")
otx.AddFlow("table=80, priority=200, reg1=0, actions=output:NXM_NX_REG2[]")
if err := otx.EndTransaction(); err != nil {
return err
}
if err := mp.node.SetupEgressNetworkPolicy(); err != nil {
return err
}
return nil
}
func (mp *multiTenantPlugin) updatePodNetwork(namespace string, oldNetID, netID uint32) {
// FIXME: this is racy; traffic coming from the pods gets switched to the new
// VNID before the service and firewall rules are updated to match. We need
// to do the updates as a single transaction (ovs-ofctl --bundle).
pods, err := mp.node.GetLocalPods(namespace)
if err != nil {
glog.Errorf("Could not get list of local pods in namespace %q: %v", namespace, err)
}
services, err := mp.node.kClient.Core().Services(namespace).List(metav1.ListOptions{})
if err != nil {
glog.Errorf("Could not get list of services in namespace %q: %v", namespace, err)
services = &kapi.ServiceList{}
}
if oldNetID != netID {
// Update OF rules for the existing/old pods in the namespace
for _, pod := range pods {
err = mp.node.UpdatePod(pod)
if err != nil {
glog.Errorf("Could not update pod %q in namespace %q: %v", pod.Name, namespace, err)
}
}
// Update OF rules for the old services in the namespace
for _, svc := range services.Items {
if !kapi.IsServiceIPSet(&svc) {
continue
}
mp.node.DeleteServiceRules(&svc)
mp.node.AddServiceRules(&svc, netID)
}
mp.EnsureVNIDRules(netID)
// Update namespace references in egress firewall rules
mp.node.UpdateEgressNetworkPolicyVNID(namespace, oldNetID, netID)
}
// Update local multicast rules
mp.node.podManager.UpdateLocalMulticastRules(oldNetID)
mp.node.podManager.UpdateLocalMulticastRules(netID)
}
func (mp *multiTenantPlugin) AddNetNamespace(netns *osapi.NetNamespace) {
mp.updatePodNetwork(netns.Name, 0, netns.NetID)
}
func (mp *multiTenantPlugin) UpdateNetNamespace(netns *osapi.NetNamespace, oldNetID uint32) {
mp.updatePodNetwork(netns.Name, oldNetID, netns.NetID)
}
func (mp *multiTenantPlugin) DeleteNetNamespace(netns *osapi.NetNamespace) {
mp.updatePodNetwork(netns.Name, netns.NetID, 0)
}
func (mp *multiTenantPlugin) GetVNID(namespace string) (uint32, error) {
return mp.vnids.WaitAndGetVNID(namespace)
}
func (mp *multiTenantPlugin) GetNamespaces(vnid uint32) []string {
return mp.vnids.GetNamespaces(vnid)
}
func (mp *multiTenantPlugin) GetMulticastEnabled(vnid uint32) bool {
return mp.vnids.GetMulticastEnabled(vnid)
}
func (mp *multiTenantPlugin) EnsureVNIDRules(vnid uint32) {
if vnid == 0 {
return
}
mp.vnidInUseLock.Lock()
defer mp.vnidInUseLock.Unlock()
if mp.vnidInUse[vnid] {
return
}
mp.vnidInUse[vnid] = true
glog.V(5).Infof("EnsureVNIDRules %d - adding rules", vnid)
otx := mp.node.oc.NewTransaction()
otx.AddFlow("table=80, priority=100, reg0=%d, reg1=%d, actions=output:NXM_NX_REG2[]", vnid, vnid)
if err := otx.EndTransaction(); err != nil {
glog.Errorf("Error adding OVS flow for VNID: %v", err)
}
}
func (mp *multiTenantPlugin) SyncVNIDRules() {
mp.vnidInUseLock.Lock()
defer mp.vnidInUseLock.Unlock()
unused := mp.node.oc.FindUnusedVNIDs()
glog.Infof("SyncVNIDRules: %d unused VNIDs", len(unused))
otx := mp.node.oc.NewTransaction()
for _, vnid := range unused {
mp.vnidInUse[uint32(vnid)] = false
otx.DeleteFlows("table=80, reg1=%d", vnid)
}
if err := otx.EndTransaction(); err != nil {
glog.Errorf("Error deleting syncing OVS VNID rules: %v", err)
}
}