| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package chartemit |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "maps" |
| 8 | "sort" |
| 9 | "strings" |
| 10 | |
| 11 | "github.com/netdata/netdata/go/plugins/pkg/netdataapi" |
| 12 | ) |
| 13 | |
| 14 | // PrepareHostInfo normalizes host-definition payloads before HOST_DEFINE. |
| 15 | // |
| 16 | // Current semantics intentionally match v1 vnode emission: |
| 17 | // - GUID/hostname must be present and wire-safe, |
| 18 | // - "_hostname" is injected when absent, |
| 19 | // - label keys and values are normalized for Netdata wire output. |
| 20 | func PrepareHostInfo(info netdataapi.HostInfo) (netdataapi.HostInfo, error) { |
| 21 | guid := strings.TrimSpace(info.GUID) |
| 22 | if guid == "" { |
| 23 | return netdataapi.HostInfo{}, fmt.Errorf("chartemit: host guid is required") |
| 24 | } |
| 25 | if sanitizeWireID(guid) != guid { |
| 26 | return netdataapi.HostInfo{}, fmt.Errorf("chartemit: host guid contains unsupported characters") |
| 27 | } |
| 28 | hostname := strings.TrimSpace(info.Hostname) |
| 29 | if hostname == "" { |
| 30 | return netdataapi.HostInfo{}, fmt.Errorf("chartemit: host hostname is required") |
| 31 | } |
| 32 | if sanitizeWireValue(hostname) != hostname { |
| 33 | return netdataapi.HostInfo{}, fmt.Errorf("chartemit: host hostname contains unsupported characters") |
| 34 | } |
| 35 | |
| 36 | labels := normalizeHostInfoLabels(info.Labels) |
| 37 | if _, ok := labels["_hostname"]; !ok { |
| 38 | labels["_hostname"] = hostname |
| 39 | } |
| 40 | |
| 41 | return netdataapi.HostInfo{ |
| 42 | GUID: guid, |
| 43 | Hostname: hostname, |
| 44 | Labels: labels, |
| 45 | }, nil |
| 46 | } |
| 47 | |
| 48 | func normalizeHostInfoLabels(in map[string]string) map[string]string { |
| 49 | labels := maps.Clone(in) |
| 50 | if len(labels) == 0 { |
| 51 | return make(map[string]string) |
| 52 | } |
| 53 | |
| 54 | keys := make([]string, 0, len(labels)) |
| 55 | for key := range labels { |
| 56 | keys = append(keys, key) |
| 57 | } |
| 58 | sort.Strings(keys) |
| 59 | |
| 60 | out := make(map[string]string, len(labels)) |
| 61 | for _, key := range keys { |
| 62 | sKey := sanitizeWireID(key) |
| 63 | if sKey == "" { |
| 64 | continue |
| 65 | } |
| 66 | out[sKey] = sanitizeWireValue(labels[key]) |
| 67 | } |
| 68 | return out |
| 69 | } |