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fix: bad udp checksum when access nodeport #975

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Aug 18, 2021
Merged

fix: bad udp checksum when access nodeport #975

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2 changes: 1 addition & 1 deletion dist/images/install-pre-1.16.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -1845,7 +1845,7 @@ spec:
- /kube-ovn/start-cniserver.sh
args:
- --enable-mirror=$ENABLE_MIRROR
- --encap-checksum=false
- --encap-checksum=true
- --service-cluster-ip-range=$SVC_CIDR
- --iface=${IFACE}
- --network-type=$NETWORK_TYPE
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2 changes: 1 addition & 1 deletion dist/images/install.sh
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Expand Up @@ -1889,7 +1889,7 @@ spec:
- /kube-ovn/start-cniserver.sh
args:
- --enable-mirror=$ENABLE_MIRROR
- --encap-checksum=false
- --encap-checksum=true
- --service-cluster-ip-range=$SVC_CIDR
- --iface=${IFACE}
- --network-type=$NETWORK_TYPE
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2 changes: 2 additions & 0 deletions dist/images/uninstall.sh
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Expand Up @@ -14,6 +14,7 @@ iptables -t filter -D FORWARD -m set --match-set ovn40subnets dst -j ACCEPT
iptables -t filter -D FORWARD -m set --match-set ovn40subnets src -j ACCEPT
iptables -t filter -D FORWARD -m set --match-set ovn40services dst -j ACCEPT
iptables -t filter -D FORWARD -m set --match-set ovn40services src -j ACCEPT
iptables -D OUTPUT -p udp -m udp --dport 6081 -j MARK --set-xmark 0x0

if [ -n "$1" ]; then
iptables -t nat -D POSTROUTING ! -s "$1" -m set --match-set ovn40subnets dst -j MASQUERADE
Expand All @@ -37,6 +38,7 @@ ip6tables -t filter -D FORWARD -m set --match-set ovn60subnets dst -j ACCEPT
ip6tables -t filter -D FORWARD -m set --match-set ovn60subnets src -j ACCEPT
ip6tables -t filter -D FORWARD -m set --match-set ovn60services dst -j ACCEPT
ip6tables -t filter -D FORWARD -m set --match-set ovn60services src -j ACCEPT
ip6tables -D OUTPUT -p udp -m udp --dport 6081 -j MARK --set-xmark 0x0

if [ -n "$1" ]; then
ip6tables -t nat -D POSTROUTING ! -s "$1" -m set --match-set ovn60subnets dst -j MASQUERADE
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4 changes: 4 additions & 0 deletions pkg/daemon/gateway.go
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Expand Up @@ -427,6 +427,8 @@ func (c *Controller) setIptables() error {
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn40subnets dst -j ACCEPT`)},
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn40services src -j ACCEPT`)},
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn40services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
}
v6Rules = []util.IPTableRule{
// nat outgoing
Expand All @@ -448,6 +450,8 @@ func (c *Controller) setIptables() error {
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn60subnets dst -j ACCEPT`)},
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn60services src -j ACCEPT`)},
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn60services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
}
)
protocols := make([]string, 2)
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