go.ligato.io/vpp-agent/v3@v3.5.0/plugins/vpp/ifplugin/config.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 ifplugin
    16  
    17  import (
    18  	"os"
    19  	"time"
    20  )
    21  
    22  var (
    23  	// PeriodicPollingPeriod between statistics reads
    24  	// TODO  should be configurable
    25  	PeriodicPollingPeriod = time.Second * 5
    26  
    27  	// StateUpdateDelay defines delay before dumping states
    28  	StateUpdateDelay = time.Second * 3
    29  
    30  	disableInterfaceStats   = os.Getenv("DISABLE_INTERFACE_STATS") != ""
    31  	disableStatusPublishing = os.Getenv("DISABLE_STATUS_PUBLISHING") != ""
    32  )
    33  
    34  // Config defines configuration for VPP ifplugin.
    35  type Config struct {
    36  	MTU              uint32   `json:"mtu"`
    37  	StatusPublishers []string `json:"status-publishers"`
    38  }
    39  
    40  // DefaultConfig returns Config with default values.
    41  func DefaultConfig() Config {
    42  	return Config{
    43  		MTU: 0,
    44  	}
    45  }
    46  
    47  func (p *IfPlugin) loadConfig() (*Config, error) {
    48  	cfg := DefaultConfig()
    49  
    50  	found, err := p.Cfg.LoadValue(&cfg)
    51  	if err != nil {
    52  		return nil, err
    53  	} else if !found {
    54  		p.Log.Debugf("config %s not found", p.Cfg.GetConfigName())
    55  		return nil, nil
    56  	}
    57  	p.Log.Debugf("config %s found: %+v", p.Cfg.GetConfigName(), cfg)
    58  
    59  	// vppStatusPublishers can override state publishers from the configuration file.
    60  	if pubs := os.Getenv("VPP_STATUS_PUBLISHERS"); pubs != "" {
    61  		p.Log.Debugf("status publishers from env: %v", pubs)
    62  		cfg.StatusPublishers = append(cfg.StatusPublishers, pubs)
    63  	}
    64  
    65  	return &cfg, err
    66  }