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Merge pull request #99574 from pacoxu/feature/check-ipv6-site-warnings
kubeadm: a warning to user as ipv6 site-local is deprecated
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commit
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@ -32,6 +32,7 @@ import (
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"k8s.io/apimachinery/pkg/util/validation/field"
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bootstrapapi "k8s.io/cluster-bootstrap/token/api"
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bootstraputil "k8s.io/cluster-bootstrap/token/util"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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kubeadmapiv1beta2 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta2"
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kubeadmcmdoptions "k8s.io/kubernetes/cmd/kubeadm/app/cmd/options"
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@ -399,6 +400,12 @@ func ValidateIPNetFromString(subnetStr string, minAddrs int64, isDualStack bool,
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if numAddresses < minAddrs {
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allErrs = append(allErrs, field.Invalid(fldPath, s.String(), fmt.Sprintf("subnet with %d address(es) is too small, the minimum is %d", numAddresses, minAddrs)))
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}
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// Warn when the subnet is in site-local range - i.e. contains addresses that belong to fec0::/10
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_, siteLocalNet, _ := net.ParseCIDR("fec0::/10")
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if siteLocalNet.Contains(s.IP) || s.Contains(siteLocalNet.IP) {
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klog.Warningf("the subnet %v contains IPv6 site-local addresses that belong to fec0::/10 which has been deprecated by rfc3879", s)
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}
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}
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return allErrs
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}
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