mirror of https://github.com/k3s-io/k3s
67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package nodeidentifier
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import (
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"strings"
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"k8s.io/apiserver/pkg/authentication/user"
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)
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// NewDefaultNodeIdentifier returns a default NodeIdentifier implementation,
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// which returns isNode=true if the user groups contain the system:nodes group
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// and the user name matches the format system:node:<nodeName>, and populates
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// nodeName if isNode is true
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func NewDefaultNodeIdentifier() NodeIdentifier {
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return defaultNodeIdentifier{}
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}
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// defaultNodeIdentifier implements NodeIdentifier
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type defaultNodeIdentifier struct{}
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// nodeUserNamePrefix is the prefix for usernames in the form `system:node:<nodeName>`
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const nodeUserNamePrefix = "system:node:"
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// NodeIdentity returns isNode=true if the user groups contain the system:nodes
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// group and the user name matches the format system:node:<nodeName>, and
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// populates nodeName if isNode is true
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func (defaultNodeIdentifier) NodeIdentity(u user.Info) (string, bool) {
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// Make sure we're a node, and can parse the node name
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if u == nil {
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return "", false
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}
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userName := u.GetName()
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if !strings.HasPrefix(userName, nodeUserNamePrefix) {
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return "", false
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}
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isNode := false
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for _, g := range u.GetGroups() {
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if g == user.NodesGroup {
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isNode = true
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break
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}
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}
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if !isNode {
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return "", false
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}
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nodeName := strings.TrimPrefix(userName, nodeUserNamePrefix)
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return nodeName, true
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}
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