diff --git a/pkg/proxy/nftables/proxier_test.go b/pkg/proxy/nftables/proxier_test.go index 5bcbe242a36..1442f63ae60 100644 --- a/pkg/proxy/nftables/proxier_test.go +++ b/pkg/proxy/nftables/proxier_test.go @@ -137,6 +137,60 @@ func NewFakeProxier(ipFamily v1.IPFamily) (*knftables.Fake, *Proxier) { return nft, p } +var baseRules = dedent.Dedent(` + add table ip kube-proxy { comment "rules for kube-proxy" ; } + + add chain ip kube-proxy cluster-ips-check + add chain ip kube-proxy filter-prerouting { type filter hook prerouting priority -110 ; } + add chain ip kube-proxy filter-forward { type filter hook forward priority -110 ; } + add chain ip kube-proxy filter-input { type filter hook input priority -110 ; } + add chain ip kube-proxy filter-output { type filter hook output priority -110 ; } + add chain ip kube-proxy filter-output-post-dnat { type filter hook output priority -90 ; } + add chain ip kube-proxy firewall-check + add chain ip kube-proxy mark-for-masquerade + add chain ip kube-proxy masquerading + add chain ip kube-proxy nat-output { type nat hook output priority -100 ; } + add chain ip kube-proxy nat-postrouting { type nat hook postrouting priority 100 ; } + add chain ip kube-proxy nat-prerouting { type nat hook prerouting priority -100 ; } + add chain ip kube-proxy nodeport-endpoints-check + add chain ip kube-proxy reject-chain { comment "helper for @no-endpoint-services / @no-endpoint-nodeports" ; } + add chain ip kube-proxy services + add chain ip kube-proxy service-endpoints-check + + add rule ip kube-proxy cluster-ips-check ip daddr @cluster-ips reject comment "Reject traffic to invalid ports of ClusterIPs" + add rule ip kube-proxy cluster-ips-check ip daddr { 172.30.0.0/16 } drop comment "Drop traffic to unallocated ClusterIPs" + add rule ip kube-proxy filter-prerouting ct state new jump firewall-check + add rule ip kube-proxy filter-forward ct state new jump service-endpoints-check + add rule ip kube-proxy filter-forward ct state new jump cluster-ips-check + add rule ip kube-proxy filter-input ct state new jump nodeport-endpoints-check + add rule ip kube-proxy filter-input ct state new jump service-endpoints-check + add rule ip kube-proxy filter-output ct state new jump service-endpoints-check + add rule ip kube-proxy filter-output ct state new jump firewall-check + add rule ip kube-proxy filter-output-post-dnat ct state new jump cluster-ips-check + add rule ip kube-proxy firewall-check ip daddr . meta l4proto . th dport vmap @firewall-ips + add rule ip kube-proxy mark-for-masquerade mark set mark or 0x4000 + add rule ip kube-proxy masquerading mark and 0x4000 == 0 return + add rule ip kube-proxy masquerading mark set mark xor 0x4000 + add rule ip kube-proxy masquerading masquerade fully-random + add rule ip kube-proxy nat-output jump services + add rule ip kube-proxy nat-postrouting jump masquerading + add rule ip kube-proxy nat-prerouting jump services + add rule ip kube-proxy nodeport-endpoints-check ip daddr @nodeport-ips meta l4proto . th dport vmap @no-endpoint-nodeports + add rule ip kube-proxy reject-chain reject + add rule ip kube-proxy services ip daddr . meta l4proto . th dport vmap @service-ips + add rule ip kube-proxy services ip daddr @nodeport-ips meta l4proto . th dport vmap @service-nodeports + add set ip kube-proxy cluster-ips { type ipv4_addr ; comment "Active ClusterIPs" ; } + add set ip kube-proxy nodeport-ips { type ipv4_addr ; comment "IPs that accept NodePort traffic" ; } + add element ip kube-proxy nodeport-ips { 192.168.0.2 } + add rule ip kube-proxy service-endpoints-check ip daddr . meta l4proto . th dport vmap @no-endpoint-services + + add map ip kube-proxy firewall-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "destinations that are subject to LoadBalancerSourceRanges" ; } + add map ip kube-proxy no-endpoint-nodeports { type inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to service nodeports with no endpoints" ; } + add map ip kube-proxy no-endpoint-services { type ipv4_addr . inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to services with no endpoints" ; } + add map ip kube-proxy service-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "ClusterIP, ExternalIP and LoadBalancer IP traffic" ; } + add map ip kube-proxy service-nodeports { type inet_proto . inet_service : verdict ; comment "NodePort traffic" ; } + `) + // TestOverallNFTablesRules creates a variety of services and verifies that the generated // rules are exactly as expected. func TestOverallNFTablesRules(t *testing.T) { @@ -301,62 +355,7 @@ func TestOverallNFTablesRules(t *testing.T) { fp.syncProxyRules() - expected := dedent.Dedent(` - add table ip kube-proxy { comment "rules for kube-proxy" ; } - - add chain ip kube-proxy mark-for-masquerade - add rule ip kube-proxy mark-for-masquerade mark set mark or 0x4000 - add chain ip kube-proxy masquerading - add rule ip kube-proxy masquerading mark and 0x4000 == 0 return - add rule ip kube-proxy masquerading mark set mark xor 0x4000 - add rule ip kube-proxy masquerading masquerade fully-random - add chain ip kube-proxy services - add chain ip kube-proxy service-endpoints-check - add rule ip kube-proxy service-endpoints-check ip daddr . meta l4proto . th dport vmap @no-endpoint-services - add chain ip kube-proxy filter-prerouting { type filter hook prerouting priority -110 ; } - add rule ip kube-proxy filter-prerouting ct state new jump firewall-check - add chain ip kube-proxy filter-forward { type filter hook forward priority -110 ; } - add rule ip kube-proxy filter-forward ct state new jump service-endpoints-check - add rule ip kube-proxy filter-forward ct state new jump cluster-ips-check - add chain ip kube-proxy filter-input { type filter hook input priority -110 ; } - add rule ip kube-proxy filter-input ct state new jump nodeport-endpoints-check - add rule ip kube-proxy filter-input ct state new jump service-endpoints-check - add chain ip kube-proxy filter-output { type filter hook output priority -110 ; } - add rule ip kube-proxy filter-output ct state new jump service-endpoints-check - add rule ip kube-proxy filter-output ct state new jump firewall-check - add chain ip kube-proxy filter-output-post-dnat { type filter hook output priority -90 ; } - add rule ip kube-proxy filter-output-post-dnat ct state new jump cluster-ips-check - add chain ip kube-proxy nat-output { type nat hook output priority -100 ; } - add rule ip kube-proxy nat-output jump services - add chain ip kube-proxy nat-postrouting { type nat hook postrouting priority 100 ; } - add rule ip kube-proxy nat-postrouting jump masquerading - add chain ip kube-proxy nat-prerouting { type nat hook prerouting priority -100 ; } - add rule ip kube-proxy nat-prerouting jump services - add chain ip kube-proxy nodeport-endpoints-check - add rule ip kube-proxy nodeport-endpoints-check ip daddr @nodeport-ips meta l4proto . th dport vmap @no-endpoint-nodeports - - add set ip kube-proxy cluster-ips { type ipv4_addr ; comment "Active ClusterIPs" ; } - add chain ip kube-proxy cluster-ips-check - add rule ip kube-proxy cluster-ips-check ip daddr @cluster-ips reject comment "Reject traffic to invalid ports of ClusterIPs" - add rule ip kube-proxy cluster-ips-check ip daddr { 172.30.0.0/16 } drop comment "Drop traffic to unallocated ClusterIPs" - - add set ip kube-proxy nodeport-ips { type ipv4_addr ; comment "IPs that accept NodePort traffic" ; } - add map ip kube-proxy firewall-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "destinations that are subject to LoadBalancerSourceRanges" ; } - add chain ip kube-proxy firewall-check - add rule ip kube-proxy firewall-check ip daddr . meta l4proto . th dport vmap @firewall-ips - - add chain ip kube-proxy reject-chain { comment "helper for @no-endpoint-services / @no-endpoint-nodeports" ; } - add rule ip kube-proxy reject-chain reject - - add map ip kube-proxy no-endpoint-services { type ipv4_addr . inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to services with no endpoints" ; } - add map ip kube-proxy no-endpoint-nodeports { type inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to service nodeports with no endpoints" ; } - - add map ip kube-proxy service-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "ClusterIP, ExternalIP and LoadBalancer IP traffic" ; } - add map ip kube-proxy service-nodeports { type inet_proto . inet_service : verdict ; comment "NodePort traffic" ; } - add rule ip kube-proxy services ip daddr . meta l4proto . th dport vmap @service-ips - add rule ip kube-proxy services ip daddr @nodeport-ips meta l4proto . th dport vmap @service-nodeports - add element ip kube-proxy nodeport-ips { 192.168.0.2 } - + expected := baseRules + dedent.Dedent(` # svc1 add chain ip kube-proxy service-ULMVA6XW-ns1/svc1/tcp/p80 add rule ip kube-proxy service-ULMVA6XW-ns1/svc1/tcp/p80 ip daddr 172.30.0.41 tcp dport 80 ip saddr != 10.0.0.0/8 jump mark-for-masquerade @@ -3942,60 +3941,6 @@ func TestInternalExternalMasquerade(t *testing.T) { func TestSyncProxyRulesRepeated(t *testing.T) { nft, fp := NewFakeProxier(v1.IPv4Protocol) - baseRules := dedent.Dedent(` - add table ip kube-proxy { comment "rules for kube-proxy" ; } - - add chain ip kube-proxy cluster-ips-check - add chain ip kube-proxy filter-prerouting { type filter hook prerouting priority -110 ; } - add chain ip kube-proxy filter-forward { type filter hook forward priority -110 ; } - add chain ip kube-proxy filter-input { type filter hook input priority -110 ; } - add chain ip kube-proxy filter-output { type filter hook output priority -110 ; } - add chain ip kube-proxy filter-output-post-dnat { type filter hook output priority -90 ; } - add chain ip kube-proxy firewall-check - add chain ip kube-proxy mark-for-masquerade - add chain ip kube-proxy masquerading - add chain ip kube-proxy nat-output { type nat hook output priority -100 ; } - add chain ip kube-proxy nat-postrouting { type nat hook postrouting priority 100 ; } - add chain ip kube-proxy nat-prerouting { type nat hook prerouting priority -100 ; } - add chain ip kube-proxy nodeport-endpoints-check - add chain ip kube-proxy reject-chain { comment "helper for @no-endpoint-services / @no-endpoint-nodeports" ; } - add chain ip kube-proxy services - add chain ip kube-proxy service-endpoints-check - - add rule ip kube-proxy cluster-ips-check ip daddr @cluster-ips reject comment "Reject traffic to invalid ports of ClusterIPs" - add rule ip kube-proxy cluster-ips-check ip daddr { 172.30.0.0/16 } drop comment "Drop traffic to unallocated ClusterIPs" - add rule ip kube-proxy filter-prerouting ct state new jump firewall-check - add rule ip kube-proxy filter-forward ct state new jump service-endpoints-check - add rule ip kube-proxy filter-forward ct state new jump cluster-ips-check - add rule ip kube-proxy filter-input ct state new jump nodeport-endpoints-check - add rule ip kube-proxy filter-input ct state new jump service-endpoints-check - add rule ip kube-proxy filter-output ct state new jump service-endpoints-check - add rule ip kube-proxy filter-output ct state new jump firewall-check - add rule ip kube-proxy filter-output-post-dnat ct state new jump cluster-ips-check - add rule ip kube-proxy firewall-check ip daddr . meta l4proto . th dport vmap @firewall-ips - add rule ip kube-proxy mark-for-masquerade mark set mark or 0x4000 - add rule ip kube-proxy masquerading mark and 0x4000 == 0 return - add rule ip kube-proxy masquerading mark set mark xor 0x4000 - add rule ip kube-proxy masquerading masquerade fully-random - add rule ip kube-proxy nat-output jump services - add rule ip kube-proxy nat-postrouting jump masquerading - add rule ip kube-proxy nat-prerouting jump services - add rule ip kube-proxy nodeport-endpoints-check ip daddr @nodeport-ips meta l4proto . th dport vmap @no-endpoint-nodeports - add rule ip kube-proxy reject-chain reject - add rule ip kube-proxy services ip daddr . meta l4proto . th dport vmap @service-ips - add rule ip kube-proxy services ip daddr @nodeport-ips meta l4proto . th dport vmap @service-nodeports - add set ip kube-proxy cluster-ips { type ipv4_addr ; comment "Active ClusterIPs" ; } - add set ip kube-proxy nodeport-ips { type ipv4_addr ; comment "IPs that accept NodePort traffic" ; } - add element ip kube-proxy nodeport-ips { 192.168.0.2 } - add rule ip kube-proxy service-endpoints-check ip daddr . meta l4proto . th dport vmap @no-endpoint-services - - add map ip kube-proxy firewall-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "destinations that are subject to LoadBalancerSourceRanges" ; } - add map ip kube-proxy no-endpoint-nodeports { type inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to service nodeports with no endpoints" ; } - add map ip kube-proxy no-endpoint-services { type ipv4_addr . inet_proto . inet_service : verdict ; comment "vmap to drop or reject packets to services with no endpoints" ; } - add map ip kube-proxy service-ips { type ipv4_addr . inet_proto . inet_service : verdict ; comment "ClusterIP, ExternalIP and LoadBalancer IP traffic" ; } - add map ip kube-proxy service-nodeports { type inet_proto . inet_service : verdict ; comment "NodePort traffic" ; } - `) - // Helper function to make it look like time has passed (from the point of view of // the stale-chain-deletion code). ageStaleChains := func() {