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Add a dummy implementation of proxyutil.LineBuffer

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Rather than actually assembling all of the rules we aren't going to
use, just count them and throw them away.
This commit is contained in:
Dan Winship
2023-07-06 14:31:00 -04:00
parent 68ed020b2a
commit 883d0c3b71
8 changed files with 344 additions and 229 deletions
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28
pkg/proxy/iptables/proxier.go
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@@ -288,10 +288,10 @@ func NewProxier(ipFamily v1.IPFamily,
precomputedProbabilities: make([]string, 0, 1001),
iptablesData: bytes.NewBuffer(nil),
existingFilterChainsData: bytes.NewBuffer(nil),
filterChains: proxyutil.LineBuffer{},
filterRules: proxyutil.LineBuffer{},
natChains: proxyutil.LineBuffer{},
natRules: proxyutil.LineBuffer{},
filterChains: proxyutil.NewLineBuffer(),
filterRules: proxyutil.NewLineBuffer(),
natChains: proxyutil.NewLineBuffer(),
natRules: proxyutil.NewLineBuffer(),
localhostNodePorts: localhostNodePorts,
nodePortAddresses: nodePortAddresses,
networkInterfacer: proxyutil.RealNetwork{},
@@ -411,8 +411,8 @@ func CleanupLeftovers(ipt utiliptables.Interface) (encounteredError bool) {
encounteredError = true
} else {
existingNATChains := utiliptables.GetChainsFromTable(iptablesData.Bytes())
natChains := &proxyutil.LineBuffer{}
natRules := &proxyutil.LineBuffer{}
natChains := proxyutil.NewLineBuffer()
natRules := proxyutil.NewLineBuffer()
natChains.Write("*nat")
// Start with chains we know we need to remove.
for _, chain := range []utiliptables.Chain{kubeServicesChain, kubeNodePortsChain, kubePostroutingChain} {
@@ -448,8 +448,8 @@ func CleanupLeftovers(ipt utiliptables.Interface) (encounteredError bool) {
encounteredError = true
} else {
existingFilterChains := utiliptables.GetChainsFromTable(iptablesData.Bytes())
filterChains := &proxyutil.LineBuffer{}
filterRules := &proxyutil.LineBuffer{}
filterChains := proxyutil.NewLineBuffer()
filterRules := proxyutil.NewLineBuffer()
filterChains.Write("*filter")
for _, chain := range []utiliptables.Chain{kubeServicesChain, kubeExternalServicesChain, kubeForwardChain, kubeNodePortsChain} {
if _, found := existingFilterChains[chain]; found {
@@ -852,8 +852,8 @@ func (proxier *Proxier) syncProxyRules() {
proxier.natChains.Reset()
proxier.natRules.Reset()
skippedNatChains := &proxyutil.LineBuffer{}
skippedNatRules := &proxyutil.LineBuffer{}
skippedNatChains := proxyutil.NewDiscardLineBuffer()
skippedNatRules := proxyutil.NewDiscardLineBuffer()
// Write chain lines for all the "top-level" chains we'll be filling in
for _, chainName := range []utiliptables.Chain{kubeServicesChain, kubeExternalServicesChain, kubeForwardChain, kubeNodePortsChain, kubeProxyFirewallChain} {
@@ -1069,9 +1069,9 @@ func (proxier *Proxier) syncProxyRules() {
}
}
filterRules := &proxier.filterRules
natChains := &proxier.natChains
natRules := &proxier.natRules
filterRules := proxier.filterRules
natChains := proxier.natChains
natRules := proxier.natRules
// Capture the clusterIP.
if hasInternalEndpoints {
@@ -1562,7 +1562,7 @@ func (proxier *Proxier) syncProxyRules() {
conntrack.CleanStaleEntries(proxier.iptables.IsIPv6(), proxier.exec, proxier.svcPortMap, serviceUpdateResult, endpointUpdateResult)
}
func (proxier *Proxier) writeServiceToEndpointRules(natRules *proxyutil.LineBuffer, svcPortNameString string, svcInfo proxy.ServicePort, svcChain utiliptables.Chain, endpoints []proxy.Endpoint, args []string) {
func (proxier *Proxier) writeServiceToEndpointRules(natRules proxyutil.LineBuffer, svcPortNameString string, svcInfo proxy.ServicePort, svcChain utiliptables.Chain, endpoints []proxy.Endpoint, args []string) {
// First write session affinity rules, if applicable.
if svcInfo.SessionAffinityType() == v1.ServiceAffinityClientIP {
for _, ep := range endpoints {