96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
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/*
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Copyright 2016 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 taints implements uitilites for working with taints
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package taints
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import (
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"fmt"
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"strings"
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"k8s.io/apimachinery/pkg/util/validation"
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"k8s.io/kubernetes/pkg/api"
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)
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// ParseTaint parses a taint from a string. Taint must be off the format '<key>=<value>:<effect>'.
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func ParseTaint(st string) (api.Taint, error) {
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var taint api.Taint
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parts := strings.Split(st, "=")
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if len(parts) != 2 || len(parts[1]) == 0 || len(validation.IsQualifiedName(parts[0])) > 0 {
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return taint, fmt.Errorf("invalid taint spec: %v", st)
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}
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parts2 := strings.Split(parts[1], ":")
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effect := api.TaintEffect(parts2[1])
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errs := validation.IsValidLabelValue(parts2[0])
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if len(parts2) != 2 || len(errs) != 0 {
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return taint, fmt.Errorf("invalid taint spec: %v, %s", st, strings.Join(errs, "; "))
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}
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if effect != api.TaintEffectNoSchedule && effect != api.TaintEffectPreferNoSchedule {
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return taint, fmt.Errorf("invalid taint spec: %v, unsupported taint effect", st)
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}
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taint.Key = parts[0]
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taint.Value = parts2[0]
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taint.Effect = effect
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return taint, nil
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}
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// NewTaintsVar wraps []api.Taint in a struct that implements flag.Value to allow taints to be
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// bound to command line flags.
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func NewTaintsVar(ptr *[]api.Taint) taintsVar {
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return taintsVar{
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ptr: ptr,
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}
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}
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type taintsVar struct {
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ptr *[]api.Taint
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}
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func (t taintsVar) Set(s string) error {
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sts := strings.Split(s, ",")
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var taints []api.Taint
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for _, st := range sts {
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taint, err := ParseTaint(st)
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if err != nil {
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return err
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}
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taints = append(taints, taint)
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}
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*t.ptr = taints
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return nil
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}
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func (t taintsVar) String() string {
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if len(*t.ptr) == 0 {
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return "<nil>"
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}
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var taints []string
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for _, taint := range *t.ptr {
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taints = append(taints, fmt.Sprintf("%s=%s:%s", taint.Key, taint.Value, taint.Effect))
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}
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return strings.Join(taints, ",")
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}
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func (t taintsVar) Type() string {
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return "[]api.Taint"
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}
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