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Set the nonMasqueradeCIDR for GCE networking 

We do need a non-masquerade CIDR, and we can use the range we draw the
pod CIDRs from (10.0.0.0/8).
This commit is contained in:
Justin SB 2023-01-21 12:13:05 -05:00
parent 4b61ae77c1
commit ca47771cff
2 changed files with 11 additions and 5 deletions
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6
upup/pkg/fi/cloudup/defaults.go
View File

@ -107,11 +107,7 @@ func PerformAssignments(c *kops.Cluster, cloud fi.Cloud) error {
}
if c.Spec.Networking.NonMasqueradeCIDR == "" {
if c.Spec.Networking.GCE != nil {
// Don't set NonMasqueradeCIDR
} else {
c.Spec.Networking.NonMasqueradeCIDR = "100.64.0.0/10"
}
c.Spec.Networking.NonMasqueradeCIDR = "100.64.0.0/10"
}
// TODO: Unclear this should be here - it isn't too hard to change

10
upup/pkg/fi/cloudup/gce/network.go
View File

@ -183,6 +183,16 @@ func performNetworkAssignmentsIPAliases(ctx context.Context, c *kops.Cluster, cl
c.Spec.Networking.PodCIDR = podCIDR.String()
c.Spec.Networking.ServiceClusterIPRange = serviceCIDR.String()
// NonMasqueradeCIDR should include all the pods and any hosts which can route to the pod IP.
// Here, that is any IP on the network.
// Networks on GCE don't have a well-defined CIDR (instead, subnets do).
// We use networkCIDR instead; these IPs are routable on the GCE network.
// Technically this means that the service CIDR would be subject to masquerade,
// but that traffic is already remapped before it reaches the masquerade rule.
// Ideally we would support all the ip ranges in use (all the private IP ranges),
// but as long as we cover the pod CIDR we should be OK.
c.Spec.Networking.NonMasqueradeCIDR = networkCIDR
return nil
}