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eni.go
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eni.go
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package daemon
import (
"context"
"fmt"
"math/rand"
"sort"
"strings"
"sync"
"time"
"github.com/AliyunContainerService/terway/deviceplugin"
"github.com/AliyunContainerService/terway/pkg/aliyun"
"github.com/AliyunContainerService/terway/pkg/ipam"
"github.com/AliyunContainerService/terway/pkg/logger"
"github.com/AliyunContainerService/terway/pkg/pool"
"github.com/AliyunContainerService/terway/pkg/tracing"
"github.com/AliyunContainerService/terway/types"
"github.com/aliyun/alibaba-cloud-sdk-go/services/vpc"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
)
var eniLog = logger.DefaultLogger
const (
// vSwitchIPCntTimeout is the duration for the vswitchIPCntMap content's effectiveness
vSwitchIPCntTimeout = 10 * time.Minute
typeNameENI = "eni"
poolNameENI = "eni"
factoryNameENI = "eni"
tracingKeyVSwitches = "vswitches"
tracingKeyVSwitchSelectionPolicy = "vswitch_selection_policy"
tracingKeyCacheExpireAt = "cache_expire_at"
)
type eniResourceManager struct {
pool pool.ObjectPool
ecs ipam.API
trunkENI *types.ENI
}
func newENIResourceManager(poolConfig *types.PoolConfig, ecs ipam.API, allocatedResources map[string]resourceManagerInitItem, ipFamily *types.IPFamily, k8s Kubernetes) (ResourceManager, error) {
eniLog.Debugf("new ENI Resource Manager, pool config: %+v, allocated resources: %+v", poolConfig, allocatedResources)
factory, err := newENIFactory(poolConfig, ecs)
if err != nil {
return nil, errors.Wrapf(err, "error create ENI factory")
}
_ = tracing.Register(tracing.ResourceTypeFactory, factoryNameENI, factory)
var capacity, memberLimit int
if !poolConfig.DisableDevicePlugin {
limit, err := aliyun.GetLimit(ecs, aliyun.GetInstanceMeta().InstanceType)
if err != nil {
return nil, fmt.Errorf("error get max eni for eni factory, %w", err)
}
capacity = limit.Adapters
capacity = int(float64(capacity)*poolConfig.EniCapRatio) + poolConfig.EniCapShift - 1
if poolConfig.MaxENI != 0 && poolConfig.MaxENI < capacity {
capacity = poolConfig.MaxENI
}
if poolConfig.MaxPoolSize > capacity {
poolConfig.MaxPoolSize = capacity
}
if poolConfig.MinENI != 0 {
poolConfig.MinPoolSize = poolConfig.MinENI
}
memberLimit = limit.MemberAdapterLimit
if poolConfig.ENICapPolicy == types.ENICapPolicyPreferTrunk {
memberLimit = limit.MaxMemberAdapterLimit
}
} else {
// NB(l1b0k): adapt DisableDevicePlugin func, will refactor latter
capacity = 1
memberLimit = 0
poolConfig.MaxPoolSize = 1
poolConfig.MinPoolSize = 0
}
var trunkENI *types.ENI
if poolConfig.WaitTrunkENI {
logger.DefaultLogger.Infof("waitting trunk eni ready")
factory.trunkOnEni, err = k8s.WaitTrunkReady()
if err != nil {
return nil, err
}
logger.DefaultLogger.Infof("trunk eni found %s", factory.trunkOnEni)
}
poolCfg := pool.Config{
Name: poolNameENI,
Type: typeNameENI,
MaxIdle: poolConfig.MaxPoolSize,
MinIdle: poolConfig.MinPoolSize,
Capacity: capacity,
Factory: factory,
Initializer: func(holder pool.ResourceHolder) error {
ctx := context.Background()
enis, err := ecs.GetAttachedENIs(ctx, false, factory.trunkOnEni)
if err != nil {
return fmt.Errorf("error get attach ENI on pool init, %w", err)
}
if factory.enableTrunk && memberLimit > 0 {
logger.DefaultLogger.Infof("lookup trunk eni")
for _, eni := range enis {
if eni.Trunk {
logger.DefaultLogger.Infof("find trunk eni %s", eni.ID)
factory.trunkOnEni = eni.ID
}
if eni.ID == factory.trunkOnEni {
trunkENI = eni
eni.Trunk = true
}
}
if factory.trunkOnEni == "" && len(enis) < capacity {
trunkENIRes, err := factory.CreateWithIPCount(1, true)
if err != nil {
return errors.Wrapf(err, "error init trunk eni")
}
trunkENI, _ = trunkENIRes[0].(*types.ENI)
factory.trunkOnEni = trunkENI.ID
enis = append(enis, trunkENI)
}
}
for _, e := range enis {
if ipFamily.IPv6 {
_, ipv6, err := ecs.GetENIIPs(ctx, e.MAC)
if err != nil || len(ipv6) == 0 {
return errors.Wrapf(err, "error get eni ip")
}
e.PrimaryIP.IPv6 = ipv6[0]
}
if item, ok := allocatedResources[e.GetResourceID()]; ok {
holder.AddInuse(e, podInfoKey(item.podInfo.Namespace, item.podInfo.Name))
} else {
holder.AddIdle(e)
}
}
return nil
},
}
p, err := pool.NewSimpleObjectPool(poolCfg)
if err != nil {
return nil, err
}
mgr := &eniResourceManager{
pool: p,
ecs: ecs,
trunkENI: trunkENI,
}
if poolConfig.DisableDevicePlugin {
return mgr, nil
}
//init deviceplugin for ENI
realCap := 0
eniType := deviceplugin.ENITypeENI
if !poolConfig.EnableENITrunking {
realCap = capacity
}
// report only trunk is created
if poolConfig.EnableENITrunking && factory.trunkOnEni != "" {
eniType = deviceplugin.ENITypeMember
realCap = memberLimit
err = k8s.PatchTrunkInfo(factory.trunkOnEni)
if err != nil {
return nil, errors.Wrapf(err, "error patch trunk info on node")
}
}
logger.DefaultLogger.Infof("set deviceplugin cap %d", realCap)
dp := deviceplugin.NewENIDevicePlugin(realCap, eniType)
err = dp.Serve()
if err != nil {
return nil, errors.Wrapf(err, "error set deviceplugin on node")
}
return mgr, nil
}
func (m *eniResourceManager) Allocate(ctx *networkContext, prefer string) (types.NetworkResource, error) {
return m.pool.Acquire(ctx, prefer, podInfoKey(ctx.pod.Namespace, ctx.pod.Name))
}
func (m *eniResourceManager) Release(context *networkContext, resItem types.ResourceItem) error {
if context != nil && context.pod != nil {
return m.pool.ReleaseWithReservation(resItem.ID, context.pod.IPStickTime)
}
return m.pool.Release(resItem.ID)
}
func (m *eniResourceManager) GarbageCollection(inUseResSet map[string]types.ResourceItem, expireResSet map[string]types.ResourceItem) error {
for expireRes, expireItem := range expireResSet {
if _, err := m.pool.Stat(expireRes); err == nil {
err = m.Release(nil, expireItem)
if err != nil {
return err
}
}
}
return nil
}
func (m *eniResourceManager) Stat(context *networkContext, resID string) (types.NetworkResource, error) {
return m.pool.Stat(resID)
}
func (m *eniResourceManager) GetResourceMapping() (tracing.ResourcePoolStats, error) {
return m.pool.GetResourceMapping()
}
// MapSorter is a slice container for sorting
type MapSorter []Item
// Item is the element type of MapSorter, which contains the values for sorting
type Item struct {
Key string
Val int
}
func newMapSorter(m map[string]int) MapSorter {
ms := make(MapSorter, 0, len(m))
for k, v := range m {
ms = append(ms, Item{k, v})
}
return ms
}
// SortInDescendingOrder is a bubble sort per element's value
func (ms MapSorter) SortInDescendingOrder() {
eniLog.Debugf("before sorting, slice = %+v", ms)
sort.Slice(ms, func(i, j int) bool {
// reverse sorting
return ms[i].Val > ms[j].Val
})
eniLog.Debugf("after sorting, slice = %+v", ms)
}
type eniFactory struct {
name string
enableTrunk bool
trunkOnEni string
switches []string
eniTags map[string]string
securityGroups []string
instanceID string
ecs ipam.API
vswitchIPCntMap map[string]int
tsExpireAt time.Time
vswitchSelectionPolicy string
disableSecurityGroupCheck bool
sync.RWMutex
}
func newENIFactory(poolConfig *types.PoolConfig, ecs ipam.API) (*eniFactory, error) {
if len(poolConfig.SecurityGroups) == 0 {
securityGroups, err := ecs.GetAttachedSecurityGroups(context.Background(), poolConfig.InstanceID)
if err != nil {
return nil, errors.Wrapf(err, "error get security group on factory init")
}
poolConfig.SecurityGroups = securityGroups
}
return &eniFactory{
name: factoryNameENI,
switches: poolConfig.VSwitch,
eniTags: poolConfig.ENITags,
securityGroups: poolConfig.SecurityGroups,
enableTrunk: poolConfig.EnableENITrunking,
instanceID: poolConfig.InstanceID,
ecs: ecs,
vswitchIPCntMap: make(map[string]int),
vswitchSelectionPolicy: poolConfig.VSwitchSelectionPolicy,
disableSecurityGroupCheck: poolConfig.DisableSecurityGroupCheck,
}, nil
}
func (f *eniFactory) GetVSwitches() ([]string, error) {
var vSwitches []string
vswCnt := len(f.switches)
// If there is ONLY ONE vswitch, then there is no need for ordering per switches' available IP counts,
// return the slice with only this vswitch.
if vswCnt == 1 {
return f.switches, nil
}
if f.vswitchSelectionPolicy == types.VSwitchSelectionPolicyRandom {
vSwitches = make([]string, vswCnt)
copy(vSwitches, f.switches)
rand.Seed(time.Now().UnixNano())
rand.Shuffle(vswCnt, func(i, j int) { vSwitches[i], vSwitches[j] = vSwitches[j], vSwitches[i] })
return vSwitches, nil
}
if f.vswitchSelectionPolicy == types.VSwitchSelectionPolicyOrdered {
// If VSwitchSelectionPolicy is ordered, then call f.ecs.DescribeVSwitch API to get the switch's available IP count
// PS: this is only feasible for systems with RAM policy for VPC API permission.
// Use f.vswitchIPCntMap to track IP count + vswitch ID
var (
start = time.Now()
err error
)
// If f.vswitchIPCntMap is empty, then fill in the map with switch + switch's available IP count.
f.Lock()
if (len(f.vswitchIPCntMap) == 0 && f.tsExpireAt.IsZero()) || start.After(f.tsExpireAt) {
// Loop vswitch slice to get each vswitch's available IP count.
for _, vswitch := range f.switches {
var vsw *vpc.VSwitch
vsw, err = f.ecs.DescribeVSwitchByID(context.Background(), vswitch)
if err != nil {
f.vswitchIPCntMap[vswitch] = 0
} else {
f.vswitchIPCntMap[vswitch] = int(vsw.AvailableIpAddressCount)
}
}
if err == nil {
// don't cache result when error
f.tsExpireAt = time.Now().Add(vSwitchIPCntTimeout)
}
}
f.Unlock()
if len(f.vswitchIPCntMap) > 0 {
m := newMapSorter(f.vswitchIPCntMap)
//sort.Sort(sort.Reverse(m))
m.SortInDescendingOrder()
for _, item := range m {
vSwitches = append(vSwitches, item.Key)
}
} else {
vSwitches = f.switches
}
}
return vSwitches, nil
}
func (f *eniFactory) Create(int) ([]types.NetworkResource, error) {
return f.CreateWithIPCount(1, false)
}
func (f *eniFactory) CreateWithIPCount(count int, trunk bool) ([]types.NetworkResource, error) {
vSwitches, _ := f.GetVSwitches()
eniLog.Infof("adjusted vswitch slice: %+v", vSwitches)
tags := map[string]string{
types.NetworkInterfaceTagCreatorKey: types.NetworkInterfaceTagCreatorValue,
}
for k, v := range f.eniTags {
tags[k] = v
}
eni, err := f.ecs.AllocateENI(context.Background(), vSwitches[0], f.securityGroups, f.instanceID, trunk, count, tags)
if err != nil {
return nil, err
}
return []types.NetworkResource{eni}, nil
}
func (f *eniFactory) Dispose(resource types.NetworkResource) error {
eni := resource.(*types.ENI)
if f.enableTrunk && eni.Trunk {
return fmt.Errorf("trunk ENI %+v will not dispose", eni.ID)
}
return f.ecs.FreeENI(context.Background(), eni.ID, f.instanceID)
}
func (f *eniFactory) Config() []tracing.MapKeyValueEntry {
config := []tracing.MapKeyValueEntry{
{Key: tracingKeyName, Value: f.name},
{Key: tracingKeyVSwitches, Value: strings.Join(f.switches, " ")},
{Key: tracingKeyVSwitchSelectionPolicy, Value: f.vswitchSelectionPolicy},
}
return config
}
func (f *eniFactory) Trace() []tracing.MapKeyValueEntry {
trace := []tracing.MapKeyValueEntry{
{Key: tracingKeyCacheExpireAt, Value: fmt.Sprint(f.tsExpireAt)},
}
for vs, cnt := range f.vswitchIPCntMap {
key := fmt.Sprintf("vswitch/%s/ip_count", vs)
trace = append(trace, tracing.MapKeyValueEntry{
Key: key,
Value: fmt.Sprint(cnt),
})
}
return trace
}
func (f *eniFactory) Execute(cmd string, _ []string, message chan<- string) {
switch cmd {
case commandMapping:
mapping, err := f.ListResource()
message <- fmt.Sprintf("mapping: %v, err: %s\n", mapping, err)
default:
message <- "can't recognize command\n"
}
close(message)
}
func (f *eniFactory) Check(res types.NetworkResource) error {
eni, ok := res.(*types.ENI)
if !ok {
return fmt.Errorf("unsupported type %T", res)
}
_, err := f.ecs.GetENIByMac(context.Background(), eni.MAC)
return err
}
func (f *eniFactory) ListResource() (map[string]types.NetworkResource, error) {
enis, err := f.ecs.GetAttachedENIs(context.Background(), false, f.trunkOnEni)
if err != nil {
return nil, err
}
mapping := make(map[string]types.NetworkResource, len(enis))
for i := 0; i < len(enis); i++ {
mapping[enis[i].GetResourceID()] = enis[i]
}
return mapping, nil
}
func (f *eniFactory) Reconcile() {
// check security group
if f.disableSecurityGroupCheck {
return
}
err := f.ecs.CheckEniSecurityGroup(context.Background(), f.securityGroups)
if err != nil {
_ = tracing.RecordNodeEvent(corev1.EventTypeWarning, "ResourceInvalid", fmt.Sprintf("eni has misconfiged security group. %s", err.Error()))
}
}