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WIP
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Signed-off-by: Peter Hunt <[email protected]>
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haircommander committed Nov 26, 2024
1 parent 5b668e8 commit fef1c56
Showing 1 changed file with 10 additions and 0 deletions.
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ import (
v1listers "k8s.io/client-go/listers/core/v1"
cache "k8s.io/client-go/tools/cache"
"k8s.io/component-base/featuregate"
"k8s.io/klog/v2"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/auth/nodeidentifier"
)
Expand Down Expand Up @@ -47,16 +48,19 @@ func NewMinimumKubeletVersion(minVersion *semver.Version,

func (m *minimumKubeletVersionAuth) Authorize(ctx context.Context, attrs authorizer.Attributes) (authorizer.Decision, string, error) {
if m.minVersion == nil {
klog.Infof("XXXXXXXX min version nil")
return authorizer.DecisionNoOpinion, "", nil
}

nodeName, isNode := m.nodeIdentifier.NodeIdentity(attrs.GetUser())
if !isNode {
// ignore requests from non-nodes
klog.Infof("XXXXXXXX not a node %v", attrs.GetUser())
return authorizer.DecisionNoOpinion, "", nil
}

if len(nodeName) == 0 {
klog.Infof("XXXXXXXX empty node name", attrs.GetUser())
return authorizer.DecisionNoOpinion, fmt.Sprintf("unknown node for user %q", attrs.GetUser().GetName()), nil
}

Expand All @@ -67,26 +71,32 @@ func (m *minimumKubeletVersionAuth) Authorize(ctx context.Context, attrs authori
switch requestResource {
case api.Resource("nodes"):
if v := attrs.GetVerb(); v == "get" || v == "update" {
klog.Infof("XXXXXXXX node get or update")
return authorizer.DecisionNoOpinion, "", nil
}
// TODO(haircommander): do we need other flavors of access reviews here?
case api.Resource("subjectaccessreviews"):
klog.Infof("XXXXXXXX SAR")
return authorizer.DecisionNoOpinion, "", nil
}
}

if !m.hasNodeInformerSyncedFn() {
klog.Infof("XXXXXXXX not synced")
return authorizer.DecisionNoOpinion, fmt.Sprintf("node informer not synced, cannot check if node %s is new enough", nodeName), nil
}

node, err := m.nodeLister.Get(nodeName)
if err != nil {
klog.Infof("XXXXXXXX failed to get node %s", nodeName)
return authorizer.DecisionNoOpinion, fmt.Sprintf("failed to get node %s: %v", nodeName, err), nil
}

if err := nodelib.IsNodeTooOld(node, m.minVersion); err != nil {
klog.Infof("XXXXXXXX node too old", nodeName)
return authorizer.DecisionDeny, err.Error(), nil
}

klog.Infof("XXXXXXXX OK")
return authorizer.DecisionNoOpinion, "", nil
}

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