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Co-authored-by: Lucas Servén Marín <lserven@gmail.com>
This commit is contained in:
leonnicolas 2021-11-01 19:02:49 +01:00 committed by GitHub
parent c59ac10e15
commit ac65330c71
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1 changed files with 3 additions and 3 deletions
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6
pkg/mesh/routes.go
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@ -250,12 +250,12 @@ func (t *Topology) Rules(cni, iptablesForwardRule bool) []iptables.Rule {
if cni {
rules = append(rules, iptables.NewRule(iptables.GetProtocol(len(t.subnet.IP)), "nat", "POSTROUTING", "-s", t.subnet.String(), "-m", "comment", "--comment", "Kilo: jump to KILO-NAT chain", "-j", "KILO-NAT"))
// Some linux distros or docker will set forward DROP in the filter table.
// To still be able to have pod to pod communication we need to ALLOW packages from and to pod CIDRs within a location.
// Leader nodes will forward packages from all nodes within a location because they act as a gateway for them.
// To still be able to have pod to pod communication we need to ALLOW packets from and to pod CIDRs within a location.
// Leader nodes will forward packets from all nodes within a location because they act as a gateway for them.
// Non leader nodes only need to allow packages from and to their own pod CIDR.
if iptablesForwardRule && t.leader {
for _, s := range t.segments {
if t.location == s.location {
if s.location == t.location {
// Make sure packets to and from pod cidrs are not dropped in the forward chain.
for _, c := range s.cidrs {
rules = append(rules, iptables.NewRule(iptables.GetProtocol(len(c.IP)), "filter", "FORWARD", "-m", "comment", "--comment", "Kilo: forward packets from the pod subnet", "-s", c.String(), "-j", "ACCEPT"))