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ovs-vsctl_linux.go
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ovs-vsctl_linux.go
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package ovs
import (
"fmt"
"strconv"
"strings"
"k8s.io/klog/v2"
"github.com/kubeovn/kube-ovn/pkg/util"
)
// SetInterfaceBandwidth set ingress/egress qos for given pod, annotation values are for node/pod
// but ingress/egress parameters here are from the point of ovs port/interface view, so reverse input parameters when call func SetInterfaceBandwidth
func SetInterfaceBandwidth(podName, podNamespace, iface, ingress, egress string) error {
ingressMPS, _ := strconv.Atoi(ingress)
ingressKPS := ingressMPS * 1000
interfaceList, err := ovsFind("interface", "name", fmt.Sprintf("external-ids:iface-id=%s", iface))
if err != nil {
klog.Error(err)
return err
}
qosIfaceUIDMap, err := ListExternalIds("qos")
if err != nil {
klog.Error(err)
return err
}
queueIfaceUIDMap, err := ListExternalIds("queue")
if err != nil {
klog.Error(err)
return err
}
for _, ifName := range interfaceList {
// ingress_policing_rate is in Kbps
err := ovsSet("interface", ifName, fmt.Sprintf("ingress_policing_rate=%d", ingressKPS), fmt.Sprintf("ingress_policing_burst=%d", ingressKPS*8/10))
if err != nil {
klog.Error(err)
return err
}
egressMPS, _ := strconv.Atoi(egress)
egressBPS := egressMPS * 1000 * 1000
if egressBPS > 0 {
queueUID, err := SetHtbQosQueueRecord(podName, podNamespace, iface, egressBPS, queueIfaceUIDMap)
if err != nil {
klog.Error(err)
return err
}
if err = SetQosQueueBinding(podName, podNamespace, ifName, iface, queueUID, qosIfaceUIDMap); err != nil {
return err
}
} else {
if qosUID, ok := qosIfaceUIDMap[iface]; ok {
qosType, err := ovsGet("qos", qosUID, "type", "")
if err != nil {
klog.Error(err)
return err
}
if qosType != util.HtbQos {
continue
}
queueID, err := ovsGet("qos", qosUID, "queues", "0")
if err != nil {
klog.Error(err)
return err
}
if _, err := Exec("remove", "queue", queueID, "other_config", "max-rate"); err != nil {
return fmt.Errorf("failed to remove rate limit for queue in pod %v/%v, %v", podNamespace, podName, err)
}
}
}
// Delete Qos and Queue record if both bandwidth and priority do not exist
if err = CheckAndUpdateHtbQos(podName, podNamespace, iface, queueIfaceUIDMap); err != nil {
klog.Errorf("failed to check htb qos: %v", err)
return err
}
}
return nil
}
func ClearHtbQosQueue(podName, podNamespace, iface string) error {
var queueList []string
var err error
if iface != "" {
queueList, err = ovsFind("queue", "_uuid", fmt.Sprintf(`external-ids:iface-id="%s"`, iface))
if err != nil {
klog.Error(err)
return err
}
} else {
queueList, err = ovsFind("queue", "_uuid", fmt.Sprintf(`external-ids:pod="%s/%s"`, podNamespace, podName))
if err != nil {
klog.Error(err)
return err
}
}
// https://github.com/kubeovn/kube-ovn/issues/1191
qosQueueMap, err := ListQosQueueIds()
if err != nil {
klog.Error(err)
return err
}
for _, queueID := range queueList {
found := false
for _, usedQueueID := range qosQueueMap {
if queueID == usedQueueID {
found = true
break
}
}
if found {
continue
}
if err := ovsDestroy("queue", queueID); err != nil {
return err
}
}
return nil
}
func IsHtbQos(iface string) (bool, error) {
qosType, err := ovsFind("qos", "type", fmt.Sprintf(`external-ids:iface-id="%s"`, iface))
if err != nil {
klog.Error(err)
return false, err
}
if len(qosType) != 0 && qosType[0] == util.HtbQos {
return true, nil
}
return false, nil
}
func SetHtbQosQueueRecord(podName, podNamespace, iface string, maxRateBPS int, queueIfaceUIDMap map[string]string) (string, error) {
var queueCommandValues []string
var err error
if maxRateBPS > 0 {
queueCommandValues = append(queueCommandValues, fmt.Sprintf("other_config:max-rate=%d", maxRateBPS))
}
if queueUID, ok := queueIfaceUIDMap[iface]; ok {
if err := ovsSet("queue", queueUID, queueCommandValues...); err != nil {
return queueUID, err
}
} else {
queueCommandValues = append(queueCommandValues, fmt.Sprintf("external-ids:iface-id=%s", iface))
if podNamespace != "" && podName != "" {
queueCommandValues = append(queueCommandValues, fmt.Sprintf("external-ids:pod=%s/%s", podNamespace, podName))
}
var queueID string
if queueID, err = ovsCreate("queue", queueCommandValues...); err != nil {
return queueUID, err
}
queueIfaceUIDMap[iface] = queueID
}
return queueIfaceUIDMap[iface], nil
}
// SetQosQueueBinding set qos related to queue record.
func SetQosQueueBinding(podName, podNamespace, ifName, iface, queueUID string, qosIfaceUIDMap map[string]string) error {
var qosCommandValues []string
qosCommandValues = append(qosCommandValues, fmt.Sprintf("queues:0=%s", queueUID))
if qosUID, ok := qosIfaceUIDMap[iface]; !ok {
qosCommandValues = append(qosCommandValues, "type=linux-htb", fmt.Sprintf(`external-ids:iface-id="%s"`, iface))
if podNamespace != "" && podName != "" {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("external-ids:pod=%s/%s", podNamespace, podName))
}
qos, err := ovsCreate("qos", qosCommandValues...)
if err != nil {
klog.Error(err)
return err
}
err = ovsSet("port", ifName, fmt.Sprintf("qos=%s", qos))
if err != nil {
klog.Error(err)
return err
}
qosIfaceUIDMap[iface] = qos
} else {
qosType, err := ovsGet("qos", qosUID, "type", "")
if err != nil {
klog.Error(err)
return err
}
if qosType != util.HtbQos {
klog.Errorf("netem qos exists for pod %s/%s, conflict with current qos, will be changed to htb qos", podNamespace, podName)
qosCommandValues = append(qosCommandValues, "type=linux-htb")
}
if qosType == util.HtbQos {
queueID, err := ovsGet("qos", qosUID, "queues", "0")
if err != nil {
klog.Error(err)
return err
}
if queueID == queueUID {
return nil
}
}
if err := ovsSet("qos", qosUID, qosCommandValues...); err != nil {
return err
}
}
return nil
}
// The latency value expressed in us.
func SetNetemQos(podName, podNamespace, iface, latency, limit, loss, jitter string) error {
latencyMs, _ := strconv.Atoi(latency)
latencyUs := latencyMs * 1000
jitterMs, _ := strconv.Atoi(jitter)
jitterUs := jitterMs * 1000
limitPkts, _ := strconv.Atoi(limit)
lossPercent, _ := strconv.ParseFloat(loss, 64)
interfaceList, err := ovsFind("interface", "name", fmt.Sprintf("external-ids:iface-id=%s", iface))
if err != nil {
klog.Error(err)
return err
}
for _, ifName := range interfaceList {
qosList, err := GetQosList(podName, podNamespace, iface)
if err != nil {
klog.Error(err)
return err
}
var qosCommandValues []string
if latencyMs > 0 {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("other_config:latency=%d", latencyUs))
}
if jitterMs > 0 {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("other_config:jitter=%d", jitterUs))
}
if limitPkts > 0 {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("other_config:limit=%d", limitPkts))
}
if lossPercent > 0 {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("other_config:loss=%v", lossPercent))
}
if latencyMs > 0 || limitPkts > 0 || lossPercent > 0 || jitterMs > 0 {
if len(qosList) == 0 {
qosCommandValues = append(qosCommandValues, "type=linux-netem", fmt.Sprintf(`external-ids:iface-id="%s"`, iface))
if podNamespace != "" && podName != "" {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("external-ids:pod=%s/%s", podNamespace, podName))
}
qos, err := ovsCreate("qos", qosCommandValues...)
if err != nil {
klog.Error(err)
return err
}
if err = ovsSet("port", ifName, fmt.Sprintf("qos=%s", qos)); err != nil {
klog.Error(err)
return err
}
} else {
for _, qos := range qosList {
qosType, err := ovsGet("qos", qos, "type", "")
if err != nil {
klog.Error(err)
return err
}
if qosType != util.NetemQos {
klog.Errorf("htb qos with higher priority exists for pod %v/%v, conflict with netem qos config, please delete htb qos first", podNamespace, podName)
return nil
}
latencyVal, lossVal, limitVal, jitterVal, err := getNetemQosConfig(qos)
if err != nil {
klog.Error(err)
klog.Errorf("failed to get other_config for qos %s: %v", qos, err)
return err
}
if latencyVal == strconv.Itoa(latencyUs) && limitVal == limit && lossVal == loss && jitterVal == strconv.Itoa(jitterUs) {
klog.Infof("no value changed for netem qos, ignore")
continue
}
if err = deleteNetemQosByID(qos, iface, podName, podNamespace); err != nil {
klog.Errorf("failed to delete netem qos: %v", err)
return err
}
qosCommandValues = append(qosCommandValues, "type=linux-netem", fmt.Sprintf(`external-ids:iface-id="%s"`, iface))
if podNamespace != "" && podName != "" {
qosCommandValues = append(qosCommandValues, fmt.Sprintf("external-ids:pod=%s/%s", podNamespace, podName))
}
qos, err := ovsCreate("qos", qosCommandValues...)
if err != nil {
klog.Errorf("failed to create netem qos: %v", err)
return err
}
if err = ovsSet("port", ifName, fmt.Sprintf("qos=%s", qos)); err != nil {
klog.Errorf("failed to set netem qos to port: %v", err)
return err
}
}
}
} else {
for _, qos := range qosList {
if err := deleteNetemQosByID(qos, iface, podName, podNamespace); err != nil {
klog.Errorf("failed to delete netem qos: %v", err)
return err
}
}
}
}
return nil
}
func getNetemQosConfig(qosID string) (string, string, string, string, error) {
var latency, loss, limit, jitter string
config, err := ovsGet("qos", qosID, "other_config", "")
if err != nil {
klog.Errorf("failed to get other_config for qos %s: %v", qosID, err)
return latency, loss, limit, jitter, err
}
if len(config) == 0 {
return latency, loss, limit, jitter, nil
}
values := strings.Split(strings.Trim(config, "{}"), ",")
for _, value := range values {
records := strings.Split(value, "=")
switch strings.TrimSpace(records[0]) {
case "latency":
latency = strings.TrimSpace(records[1])
case "loss":
loss = strings.TrimSpace(records[1])
case "limit":
limit = strings.TrimSpace(records[1])
case "jitter":
jitter = strings.TrimSpace(records[1])
}
}
return latency, loss, limit, jitter, nil
}
func deleteNetemQosByID(qosID, iface, podName, podNamespace string) error {
qosType, _ := ovsGet("qos", qosID, "type", "")
if qosType != util.NetemQos {
return nil
}
if err := ClearPortQosBinding(iface); err != nil {
klog.Errorf("failed to delete qos bingding info for interface %s: %v", iface, err)
return err
}
// reuse this function to delete qos record
if err := ClearPodBandwidth(podName, podNamespace, iface); err != nil {
klog.Errorf("failed to delete netemqos record for pod %s/%s: %v", podNamespace, podName, err)
return err
}
return nil
}
func IsUserspaceDataPath() (is bool, err error) {
dp, err := ovsFind("bridge", "datapath_type", "name=br-int")
if err != nil {
klog.Error(err)
return false, err
}
return len(dp) > 0 && dp[0] == "netdev", nil
}
func CheckAndUpdateHtbQos(podName, podNamespace, ifaceID string, queueIfaceUIDMap map[string]string) error {
var queueUID string
var ok bool
if queueUID, ok = queueIfaceUIDMap[ifaceID]; !ok {
return nil
}
config, err := ovsGet("queue", queueUID, "other_config", "")
if err != nil {
klog.Errorf("failed to get other_config for queueID %s: %v", queueUID, err)
return err
}
// bandwidth or priority exists, can not delete qos
if config != "{}" {
return nil
}
if htbQos, _ := IsHtbQos(ifaceID); !htbQos {
return nil
}
if err := ClearPortQosBinding(ifaceID); err != nil {
klog.Errorf("failed to delete qos binding info: %v", err)
return err
}
if err := ClearPodBandwidth(podName, podNamespace, ifaceID); err != nil {
klog.Errorf("failed to delete htbqos record: %v", err)
return err
}
if err := ClearHtbQosQueue(podName, podNamespace, ifaceID); err != nil {
klog.Errorf("failed to delete htbqos queue: %v", err)
return err
}
return nil
}