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package main
import (
"fmt"
"io/ioutil"
"os"
"strings"
"gopkg.in/yaml.v3"
)
type NetDevConfig map[string]interface{}
type ContainerConfig map[string]interface{}
type YamlTopology struct {
Devices []NetDevConfig `yaml:"devices"`
Containers []ContainerConfig `yaml:"containers"`
Volumes []string `yaml:"volumes"`
}
func AddAddress(device, address, ns string) error {
c := []string{"ip", "addr", "add", address, "dev", device}
cmd := appendNetns(c, ns)
err := cmd.Run()
if err != nil {
return fmt.Errorf("failed to set ip address for %s: %v", device, err)
}
return nil
}
func convertToNetConfig(t *YamlTopology) (*NetTopology, error) {
var topology NetTopology
for _, dev := range t.Devices {
topology = append(topology, NewNetConfig(dev))
}
return &topology, nil
}
func loadTopoFile(topoName string) (*NetTopology, error) {
var yamlTopo YamlTopology
data, err := ioutil.ReadFile(topoName)
if err != nil {
return nil, fmt.Errorf("read error: %v", err)
}
err = yaml.Unmarshal(data, &yamlTopo)
if err != nil {
return nil, fmt.Errorf("error parsing topology data: %v", err)
}
return convertToNetConfig(&yamlTopo)
}
func LoadTopology(path, topoName string) (*NetTopology, error) {
dir, err := os.Open(path)
if err != nil {
return nil, err
}
defer dir.Close()
files, err := dir.Readdir(0)
if err != nil {
return nil, err
}
for i := range files {
file := files[i]
fileName := file.Name()
// cut off file extension
f := strings.Split(fileName, ".")[0]
if f == topoName {
return loadTopoFile(path + fileName)
}
}
return nil, fmt.Errorf("topology '%s' not found", topoName)
}
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