| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | //go:build linux || freebsd || openbsd || netbsd || dragonfly |
| 4 | |
| 5 | package isc_dhcpd |
| 6 | |
| 7 | import ( |
| 8 | "context" |
| 9 | _ "embed" |
| 10 | "errors" |
| 11 | "fmt" |
| 12 | "time" |
| 13 | |
| 14 | "github.com/netdata/netdata/go/plugins/plugin/framework/collectorapi" |
| 15 | ) |
| 16 | |
| 17 | //go:embed "config_schema.json" |
| 18 | var configSchema string |
| 19 | |
| 20 | func init() { |
| 21 | collectorapi.Register("isc_dhcpd", collectorapi.Creator{ |
| 22 | JobConfigSchema: configSchema, |
| 23 | Defaults: collectorapi.Defaults{ |
| 24 | UpdateEvery: 1, |
| 25 | }, |
| 26 | Create: func() collectorapi.CollectorV1 { return New() }, |
| 27 | Config: func() any { return &Config{} }, |
| 28 | }) |
| 29 | } |
| 30 | |
| 31 | func New() *Collector { |
| 32 | return &Collector{ |
| 33 | Config: Config{ |
| 34 | LeasesPath: "/var/lib/dhcp/dhcpd.leases", |
| 35 | }, |
| 36 | |
| 37 | collected: make(map[string]int64), |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | type ( |
| 42 | Config struct { |
| 43 | UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"` |
| 44 | LeasesPath string `yaml:"leases_path" json:"leases_path"` |
| 45 | // TODO: parse config file to extract configured pool |
| 46 | Pools []PoolConfig `yaml:"pools" json:"pools"` |
| 47 | } |
| 48 | PoolConfig struct { |
| 49 | Name string `yaml:"name" json:"name"` |
| 50 | Networks string `yaml:"networks" json:"networks"` |
| 51 | } |
| 52 | ) |
| 53 | |
| 54 | type Collector struct { |
| 55 | collectorapi.Base |
| 56 | Config `yaml:",inline" json:""` |
| 57 | |
| 58 | charts *collectorapi.Charts |
| 59 | |
| 60 | pools []ipPool |
| 61 | leasesModTime time.Time |
| 62 | collected map[string]int64 |
| 63 | } |
| 64 | |
| 65 | func (c *Collector) Configuration() any { |
| 66 | return c.Config |
| 67 | } |
| 68 | |
| 69 | func (c *Collector) Init(context.Context) error { |
| 70 | err := c.validateConfig() |
| 71 | if err != nil { |
| 72 | return fmt.Errorf("config validation: %v", err) |
| 73 | } |
| 74 | |
| 75 | pools, err := c.initPools() |
| 76 | if err != nil { |
| 77 | return fmt.Errorf("ip pools init: %v", err) |
| 78 | } |
| 79 | c.pools = pools |
| 80 | |
| 81 | charts, err := c.initCharts(pools) |
| 82 | if err != nil { |
| 83 | return fmt.Errorf("charts init: %v", err) |
| 84 | } |
| 85 | c.charts = charts |
| 86 | |
| 87 | c.Debugf("monitoring leases file: %v", c.Config.LeasesPath) |
| 88 | c.Debugf("monitoring ip pools: %v", c.Config.Pools) |
| 89 | |
| 90 | return nil |
| 91 | } |
| 92 | |
| 93 | func (c *Collector) Check(context.Context) error { |
| 94 | mx, err := c.collect() |
| 95 | if err != nil { |
| 96 | return err |
| 97 | } |
| 98 | if len(mx) == 0 { |
| 99 | return errors.New("no metrics collected") |
| 100 | } |
| 101 | return nil |
| 102 | } |
| 103 | |
| 104 | func (c *Collector) Charts() *collectorapi.Charts { |
| 105 | return c.charts |
| 106 | } |
| 107 | |
| 108 | func (c *Collector) Collect(context.Context) map[string]int64 { |
| 109 | mx, err := c.collect() |
| 110 | if err != nil { |
| 111 | c.Error(err) |
| 112 | } |
| 113 | |
| 114 | if len(mx) == 0 { |
| 115 | return nil |
| 116 | } |
| 117 | |
| 118 | return mx |
| 119 | } |
| 120 | |
| 121 | func (c *Collector) Cleanup(context.Context) {} |