github.com/zhyoulun/cilium@v1.6.12/pkg/kvstore/backwards_compat.go (about)

     1  // Copyright 2016-2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kvstore
    16  
    17  import (
    18  	"github.com/cilium/cilium/common"
    19  )
    20  
    21  // deleteLegacyPrefixes removes old kvstore prefixes of non-persistent keys
    22  // which have been used in the past but have been obsoleted since. We remove
    23  // them on agent start to ensure that as users upgrade, we do not leave behind
    24  // stale keys
    25  //
    26  // Rules:
    27  //  - For non-persistent state, obsoletd prefixes can be deleted as soon as the
    28  //    prefix has been declared obsolete
    29  //
    30  //  - For persistent configuration stored in the kvstore, a forward upgrade
    31  //    path must be created which automatically removes the old keys on successful
    32  //    translation.
    33  //
    34  func deleteLegacyPrefixes() {
    35  	// Delete all keys in old services prefix
    36  	Client().DeletePrefix(common.ServicePathV1)
    37  }