forked from tolitius/attache
-
Notifications
You must be signed in to change notification settings - Fork 0
/
consul.go
100 lines (81 loc) · 2.57 KB
/
consul.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
/*
Package attache is a younger brother of https://github.com/tolitius/envoy
that makes a bridge between Consul and application data structures a little more beautiful.
*/
package attache
import (
"fmt"
"log"
"strings"
"time"
consulapi "github.com/hashicorp/consul/api"
)
// ConsulToMap takes a consul config and a path offset
// Connects to consul "key/value".
// Reads all (i.e. "recurse") {k, v} pairs under the path offset
// into a map[string]string preserving path hierarchy in map keys: i.e. {"universe/answers/main": "42"}
func ConsulToMap(consulSpec *consulapi.Config, offset string, keysWithOffset ...bool) (map[string]string, error) {
consul, err := consulapi.NewClient(consulSpec)
if err != nil {
return nil, err
}
kv := consul.KV()
config := make(map[string]string)
kvps, _, err := kv.List(offset, nil)
if err != nil {
return nil, fmt.Errorf("failed to fetch k/v pairs from consul: %+v, path offset: %s. due to %v", consulSpec, offset, err)
}
withOffset := true
if len(keysWithOffset) > 0 {
withOffset = keysWithOffset[0]
}
for _, kvp := range kvps {
if val := kvp.Value; val != nil {
k := kvp.Key
if !withOffset {
k = strings.Split(kvp.Key, offset)[1]
}
config[k] = string(val[:])
}
}
log.Printf("read consul map at offset: /%s\n", offset)
excludeList := []string{"password", "secret", "auth"}
for k, v := range config {
_, found := func(slice []string, key string) (int, bool) {
for i, item := range slice {
search := strings.Contains(key, item)
if search != false {
return i, true
}
}
return -1, false
}(excludeList, k)
if !found {
fmt.Printf("read consul map entry: {:%s, %s }\n", k, v)
} else {
fmt.Printf("read consul map entry: {:%s, %s }\n", k, "*******")
}
}
return config, nil
}
// MapToConsul takes a consul config and a map[string]string
// Connects to consul "key/value".
// Walks over a given map and "PUT"s its etries to consul
// respecting path hierarchy encoded in keys: i.e. {"universe/answer/main": 42}.
// Returns a total time.Duration of all the "PUT" operations
func MapToConsul(consulSpec *consulapi.Config, config map[string]string) (time.Duration, error) {
consul, err := consulapi.NewClient(consulSpec)
if err != nil {
return 0, err
}
kv := consul.KV()
var duration time.Duration
for k, v := range config {
took, err := kv.Put(&consulapi.KVPair{Key: k, Value: []byte(v)}, nil)
if err != nil {
return 0, fmt.Errorf("could not put a key, value: {%s, %s} to consul %+v due to %v", k, v, consulSpec, err)
}
duration += took.RequestTime
}
return duration, nil
}