iptables.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/metrics/utils

     1  // Copyright 2021 Chaos Mesh Authors.
     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  
    16  package utils
    17  
    18  import (
    19  	"bytes"
    20  	"context"
    21  
    22  	"github.com/retailnext/iptables_exporter/iptables"
    23  
    24  	"github.com/chaos-mesh/chaos-mesh/pkg/bpm"
    25  )
    26  
    27  func GetIptablesContentByNetNS(pid uint32) (tables iptables.Tables, err error) {
    28  	return getIptablesContent(true, pid)
    29  }
    30  
    31  func getIptablesContent(enterNS bool, pid uint32) (tables iptables.Tables, err error) {
    32  	builder := bpm.DefaultProcessBuilder("iptables-save", "-c")
    33  	if enterNS {
    34  		builder = builder.SetNS(pid, bpm.NetNS)
    35  	}
    36  
    37  	out, err := builder.Build(context.TODO()).CombinedOutput()
    38  	if err != nil {
    39  		return nil, err
    40  	}
    41  
    42  	return iptables.ParseIptablesSave(bytes.NewReader(out))
    43  }
    44