| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package vnodes |
| 4 | |
| 5 | import ( |
| 6 | _ "embed" |
| 7 | "fmt" |
| 8 | "io" |
| 9 | "io/fs" |
| 10 | "log/slog" |
| 11 | "maps" |
| 12 | "os" |
| 13 | "path/filepath" |
| 14 | |
| 15 | "github.com/google/uuid" |
| 16 | "gopkg.in/yaml.v2" |
| 17 | |
| 18 | "github.com/netdata/netdata/go/plugins/logger" |
| 19 | "github.com/netdata/netdata/go/plugins/pkg/pluginconfig" |
| 20 | ) |
| 21 | |
| 22 | //go:embed "config_schema.json" |
| 23 | var ConfigSchema string |
| 24 | |
| 25 | var log = logger.New().With( |
| 26 | slog.String("component", "vnodes"), |
| 27 | ) |
| 28 | |
| 29 | func Load(dir string) map[string]*VirtualNode { |
| 30 | return readConfDir(dir) |
| 31 | } |
| 32 | |
| 33 | type VirtualNode struct { |
| 34 | Name string `yaml:"name" json:"name"` |
| 35 | Hostname string `yaml:"hostname" json:"hostname"` |
| 36 | GUID string `yaml:"guid" json:"guid"` |
| 37 | Labels map[string]string `yaml:"labels,omitempty" json:"labels"` |
| 38 | |
| 39 | Source string `yaml:"-" json:"-"` |
| 40 | SourceType string `yaml:"-" json:"-"` |
| 41 | } |
| 42 | |
| 43 | func (v *VirtualNode) Copy() *VirtualNode { |
| 44 | if v == nil { |
| 45 | return nil |
| 46 | } |
| 47 | |
| 48 | labels := make(map[string]string, len(v.Labels)) |
| 49 | maps.Copy(labels, v.Labels) |
| 50 | |
| 51 | return &VirtualNode{ |
| 52 | Name: v.Name, |
| 53 | Hostname: v.Hostname, |
| 54 | GUID: v.GUID, |
| 55 | Source: v.Source, |
| 56 | SourceType: v.SourceType, |
| 57 | Labels: labels, |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | func (v *VirtualNode) Equal(vn *VirtualNode) bool { |
| 62 | return v.Name == vn.Name && |
| 63 | v.Hostname == vn.Hostname && |
| 64 | v.GUID == vn.GUID && |
| 65 | maps.Equal(v.Labels, vn.Labels) |
| 66 | } |
| 67 | |
| 68 | func readConfDir(dir string) map[string]*VirtualNode { |
| 69 | vnodes := make(map[string]*VirtualNode) |
| 70 | |
| 71 | _ = filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error { |
| 72 | if err != nil { |
| 73 | log.Warning(err) |
| 74 | return nil |
| 75 | } |
| 76 | |
| 77 | if d.Type()&os.ModeSymlink != 0 { |
| 78 | dst, err := os.Readlink(path) |
| 79 | if err != nil { |
| 80 | log.Warningf("failed to resolve symlink '%s': %v", path, err) |
| 81 | return nil |
| 82 | } |
| 83 | |
| 84 | if !filepath.IsAbs(dst) { |
| 85 | dst = filepath.Join(filepath.Dir(path), filepath.Clean(dst)) |
| 86 | } |
| 87 | |
| 88 | fi, err := os.Stat(dst) |
| 89 | if err != nil { |
| 90 | log.Warningf("failed to stat resolved path '%s': %v", dst, err) |
| 91 | return nil |
| 92 | } |
| 93 | if !fi.Mode().IsRegular() { |
| 94 | log.Debugf("'%s' is not a regular file, skipping it", dst) |
| 95 | return nil |
| 96 | } |
| 97 | path = dst |
| 98 | } else if !d.Type().IsRegular() { |
| 99 | log.Debugf("'%s' is not a regular file, skipping it", path) |
| 100 | return nil |
| 101 | } |
| 102 | |
| 103 | if !isConfigFile(path) { |
| 104 | log.Debugf("'%s' is not a config file (wrong extension), skipping it", path) |
| 105 | return nil |
| 106 | } |
| 107 | |
| 108 | var cfg []VirtualNode |
| 109 | |
| 110 | if err := loadConfigFile(&cfg, path); err != nil { |
| 111 | log.Warning(err) |
| 112 | return nil |
| 113 | } |
| 114 | |
| 115 | for _, v := range cfg { |
| 116 | if v.Hostname == "" || v.GUID == "" { |
| 117 | log.Warningf("skipping virtual node '%+v': required fields are missing (%s)", v, path) |
| 118 | continue |
| 119 | } |
| 120 | if err := uuid.Validate(v.GUID); err != nil { |
| 121 | log.Warningf("skipping virtual node '%+v': invalid GUID: %v (%s)", v, err, path) |
| 122 | continue |
| 123 | } |
| 124 | if _, ok := vnodes[v.Hostname]; ok { |
| 125 | log.Warningf("skipping virtual node '%+v': duplicate node (%s)", v, path) |
| 126 | continue |
| 127 | } |
| 128 | |
| 129 | v := v |
| 130 | |
| 131 | if v.Name != "" && v.Name != v.Hostname { |
| 132 | log.Warningf( |
| 133 | "ignoring virtual node name '%s' for hostname '%s'; file-based vnode identity uses hostname", |
| 134 | v.Name, v.Hostname, |
| 135 | ) |
| 136 | } |
| 137 | v.Name = v.Hostname |
| 138 | v.Source = fmt.Sprintf("file=%s", path) |
| 139 | if isStockConfig(path) { |
| 140 | v.SourceType = "stock" |
| 141 | } else { |
| 142 | v.SourceType = "user" |
| 143 | } |
| 144 | |
| 145 | log.Debugf("adding virtual node'%+v' (%s)", v, path) |
| 146 | vnodes[v.Hostname] = &v |
| 147 | } |
| 148 | |
| 149 | return nil |
| 150 | }) |
| 151 | |
| 152 | return vnodes |
| 153 | } |
| 154 | |
| 155 | func isConfigFile(path string) bool { |
| 156 | switch filepath.Ext(path) { |
| 157 | case ".yaml", ".yml", ".conf": |
| 158 | return true |
| 159 | default: |
| 160 | return false |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | func loadConfigFile(conf any, path string) error { |
| 165 | f, err := os.Open(path) |
| 166 | if err != nil { |
| 167 | return err |
| 168 | } |
| 169 | defer func() { _ = f.Close() }() |
| 170 | |
| 171 | if err := yaml.NewDecoder(f).Decode(conf); err != nil && err != io.EOF { |
| 172 | return err |
| 173 | } |
| 174 | |
| 175 | return nil |
| 176 | } |
| 177 | |
| 178 | func isStockConfig(path string) bool { |
| 179 | return pluginconfig.IsStock(path) |
| 180 | } |