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snatlocalinfo.go
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snatlocalinfo.go
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// Copyright 2019 Cisco Systems, Inc.
//
// 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 WARRATIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// creates snat crs.
package hostagent
import (
"context"
"reflect"
snatLocalInfov1 "github.com/noironetworks/aci-containers/pkg/snatlocalinfo/apis/aci.snat/v1"
v1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type SnatLocalInfo struct {
snatIp string
destIps []string
snatpolicyName string
}
func (agent *HostAgent) populateSnatLocalInfos() error {
env := agent.env.(*K8sEnvironment)
agent.log.Debug("Populating opflexSnatLocalInfos from SnatLocalInfo CR")
snatLocalInfoClient := env.snatLocalInfoClient
if snatLocalInfoClient != nil {
snatLocalInfoCr, err := snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Get(context.TODO(), agent.config.NodeName, metav1.GetOptions{})
if err != nil && !apierrors.IsNotFound(err) {
agent.log.Error("Failed to get snatlocalinfo ", err.Error())
return err
}
agent.indexMutex.Lock()
for _, localInfo := range snatLocalInfoCr.Spec.LocalInfos {
if localInfo.PodUid != "" {
var snatLocalInfo opflexSnatLocalInfo
snatLocalInfo.Snatpolicies = make(map[ResourceType][]string)
snatLocalInfo.Existing = true
agent.opflexSnatLocalInfos[localInfo.PodUid] = &snatLocalInfo
agent.log.Debug("Populated opflexSnatLocalInfos for poduid :", localInfo.PodUid)
}
}
agent.indexMutex.Unlock()
}
return nil
}
func (agent *HostAgent) UpdateLocalInfoCr() bool {
env := agent.env.(*K8sEnvironment)
snatLocalInfoClient := env.snatLocalInfoClient
if snatLocalInfoClient == nil {
agent.log.Debug("snatLocalInfo or Kube clients are not intialized")
return false
}
if agent.config.ChainedMode {
return false
}
agent.indexMutex.Lock()
ginfos, ok := agent.opflexSnatGlobalInfos[agent.config.NodeName]
if !ok {
agent.indexMutex.Unlock()
return agent.deleteLocalInfoCr()
}
snatLocalInfo := make(map[string]SnatLocalInfo)
for _, ginfo := range ginfos {
var localInfo SnatLocalInfo
localInfo.snatIp = ginfo.SnatIp
agent.snatPolicyCacheMutex.RLock()
if _, ok := agent.snatPolicyCache[ginfo.SnatPolicyName]; ok {
if len(agent.snatPolicyCache[ginfo.SnatPolicyName].Spec.DestIp) == 0 {
localInfo.destIps = []string{"0.0.0.0/0"}
} else {
localInfo.destIps =
agent.snatPolicyCache[ginfo.SnatPolicyName].Spec.DestIp
}
}
agent.snatPolicyCacheMutex.RUnlock()
localInfo.snatpolicyName = ginfo.SnatPolicyName
snatLocalInfo[ginfo.SnatIpUid] = localInfo
}
var localInfos []snatLocalInfov1.LocalInfo
for uid, v := range agent.opflexSnatLocalInfos {
var localinfo snatLocalInfov1.LocalInfo
var policies []snatLocalInfov1.SnatPolicy
for _, plcyUid := range v.PlcyUuids {
if linfo, ok := snatLocalInfo[plcyUid]; ok {
var policy snatLocalInfov1.SnatPolicy
policy.SnatIp = linfo.snatIp
policy.DestIp = linfo.destIps
policy.Name = linfo.snatpolicyName
policies = append(policies, policy)
}
}
epkey := agent.podUidToName[uid]
podobj, exists, err := agent.podInformer.GetStore().GetByKey(epkey)
if exists && err == nil {
pod := podobj.(*v1.Pod)
localinfo.PodName = pod.ObjectMeta.Name
localinfo.PodNamespace = pod.ObjectMeta.Namespace
agent.log.Debugf("Adding pod %s to snatLocalInfo:", localinfo.PodName)
}
localinfo.PodUid = uid
localinfo.SnatPolicies = policies
if len(policies) > 0 {
localInfos = append(localInfos, localinfo)
}
}
agent.indexMutex.Unlock()
snatLocalInfoCr, err := snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Get(context.TODO(), agent.config.NodeName, metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
snatLocalInfoInstance := &snatLocalInfov1.SnatLocalInfo{
ObjectMeta: metav1.ObjectMeta{
Name: agent.config.NodeName,
Namespace: agent.config.AciSnatNamespace,
},
Spec: snatLocalInfov1.SnatLocalInfoSpec{
LocalInfos: localInfos,
},
}
_, err = snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Create(context.TODO(), snatLocalInfoInstance, metav1.CreateOptions{})
if err != nil {
agent.log.Error("SnatLocalInfo Creation failed: ", err.Error())
}
}
} else {
Spec := snatLocalInfov1.SnatLocalInfoSpec{
LocalInfos: localInfos,
}
if !reflect.DeepEqual(snatLocalInfoCr.Spec, Spec) {
snatLocalInfoCr.Spec = Spec
_, err = snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Update(context.TODO(), snatLocalInfoCr, metav1.UpdateOptions{})
if err != nil {
agent.log.Error("SnatLocalInfo Updation failed: ", err.Error())
}
}
}
if err == nil {
agent.log.Debug("SnatLocalInfo Update Successful..")
return false
}
return true
}
func (agent *HostAgent) deleteLocalInfoCr() bool {
env := agent.env.(*K8sEnvironment)
snatLocalInfoClient := env.snatLocalInfoClient
_, err := snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Get(context.TODO(), agent.config.NodeName, metav1.GetOptions{})
if err == nil {
err = snatLocalInfoClient.AciV1().SnatLocalInfos(agent.config.AciSnatNamespace).Delete(context.TODO(), agent.config.NodeName, metav1.DeleteOptions{})
if err != nil {
agent.log.Debug("SnatLocalInfo failed to delete: ", err)
return true
}
}
return false
}