go.ligato.io/vpp-agent/v3@v3.5.0/examples/kvscheduler/mock_plugins/scenario/pending_after_change.go (about)

     1  //  Copyright (c) 2019 Cisco and/or its affiliates.
     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 scenario
    16  
    17  import (
    18  	"context"
    19  	"log"
    20  
    21  	"go.ligato.io/vpp-agent/v3/client"
    22  )
    23  
    24  // PendingAfterChange presents a scenario, in which originally configured objects
    25  // must be deleted and set as PENDING, because some another object, which they
    26  // depend on, was set to be un-configured by an update transaction.
    27  func PendingAfterChange() {
    28  	c := client.LocalClient
    29  	listKnownModels(c)
    30  
    31  	printMessage(
    32  		"Resync config",
    33  		"  - 2 TAP interfaces (tap1, tap2) and 1 loopback are configured",
    34  		"    and added into a bridge-domain",
    35  		"  - FIB entry is defined to forward traffic for a certain",
    36  		"    MAC address via tap2",
    37  	)
    38  	err := c.ResyncConfig(
    39  		tap1, tap2, loopback1, bd1, fib2,
    40  	)
    41  	if err != nil {
    42  		log.Println(err)
    43  	}
    44  	informAboutGraphURL(0, true, true)
    45  
    46  	printMessage(
    47  		"Change config",
    48  		"  - the loopback interface is put DOWN",
    49  		"    (no further effect, remains in the bridge-domain)",
    50  		"  - tap1 MAC address is changed",
    51  		"     -> the changed is performed by Update, re-creation is not needed",
    52  		"  - tap2 interface is removed",
    53  		"     -> the associated FIB that depends on tap2 to be in the bridge",
    54  		"        domain is un-configured *first*, and goes into the PENDING",
    55  		"        state",
    56  		"     -> the interface is correctly removed from BD *before* it is",
    57  		"        un-configured",
    58  		"     -> the binding between BD and the TAP becomes pending",
    59  	)
    60  	loopback1.Enabled = false
    61  	tap1.PhysAddress = "11:22:33:44:55:66"
    62  
    63  	req := c.ChangeRequest()
    64  	req.Update(tap1, loopback1)
    65  	req.Delete(tap2)
    66  	if err := req.Send(context.Background()); err != nil {
    67  		log.Println(err)
    68  	}
    69  	informAboutGraphURL(1, false, true)
    70  }