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Ipvs: Add a new FlagSourceHash to "mh" distribution method.

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With the flag, ipvs uses both source IP and source port (instead of
only source IP) to distribute new connections evently to endpoints
that avoids sending all connections from the same client (i.e. same
source IP) to one single endpoint.

User can explicitly set sessionAffinity in service spec to keep all
connections from a source IP to end up on the same endpoint if needed.

Change-Id: I42f950c0840ac06a4ee68a7bbdeab0fc5505c71f
This commit is contained in:
Son Dinh
2023-01-31 21:55:45 +11:00
committed by Son Dinh
parent cf14b50b0d
commit 4f75949bcb
4 changed files with 46 additions and 4 deletions
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16
pkg/proxy/ipvs/proxier.go
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@@ -1180,6 +1180,10 @@ func (proxier *Proxier) syncProxyRules() {
serv.Flags |= utilipvs.FlagPersistent
serv.Timeout = uint32(svcInfo.StickyMaxAgeSeconds())
}
// Set the source hash flag needed for the distribution method "mh"
if proxier.ipvsScheduler == "mh" {
serv.Flags |= utilipvs.FlagSourceHash
}
// We need to bind ClusterIP to dummy interface, so set `bindAddr` parameter to `true` in syncService()
if err := proxier.syncService(svcPortNameString, serv, true, bindedAddresses); err == nil {
activeIPVSServices[serv.String()] = true
@@ -1233,6 +1237,10 @@ func (proxier *Proxier) syncProxyRules() {
serv.Flags |= utilipvs.FlagPersistent
serv.Timeout = uint32(svcInfo.StickyMaxAgeSeconds())
}
// Set the source hash flag needed for the distribution method "mh"
if proxier.ipvsScheduler == "mh" {
serv.Flags |= utilipvs.FlagSourceHash
}
if err := proxier.syncService(svcPortNameString, serv, true, bindedAddresses); err == nil {
activeIPVSServices[serv.String()] = true
activeBindAddrs[serv.Address.String()] = true
@@ -1333,6 +1341,10 @@ func (proxier *Proxier) syncProxyRules() {
serv.Flags |= utilipvs.FlagPersistent
serv.Timeout = uint32(svcInfo.StickyMaxAgeSeconds())
}
// Set the source hash flag needed for the distribution method "mh"
if proxier.ipvsScheduler == "mh" {
serv.Flags |= utilipvs.FlagSourceHash
}
if err := proxier.syncService(svcPortNameString, serv, true, bindedAddresses); err == nil {
activeIPVSServices[serv.String()] = true
activeBindAddrs[serv.Address.String()] = true
@@ -1476,6 +1488,10 @@ func (proxier *Proxier) syncProxyRules() {
serv.Flags |= utilipvs.FlagPersistent
serv.Timeout = uint32(svcInfo.StickyMaxAgeSeconds())
}
// Set the source hash flag needed for the distribution method "mh"
if proxier.ipvsScheduler == "mh" {
serv.Flags |= utilipvs.FlagSourceHash
}
// There is no need to bind Node IP to dummy interface, so set parameter `bindAddr` to `false`.
if err := proxier.syncService(svcPortNameString, serv, false, bindedAddresses); err == nil {
activeIPVSServices[serv.String()] = true