-
Notifications
You must be signed in to change notification settings - Fork 2
/
main.go
385 lines (342 loc) · 9.11 KB
/
main.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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
package main
import (
"context"
"encoding/csv"
"fmt"
"log"
"os"
"sort"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/ssm"
"github.com/aws/aws-sdk-go-v2/service/ssm/types"
"github.com/urfave/cli"
)
func main() {
var (
showSecrets = false // print secrets to stdout
awsProfile = "" // override AWS profile used
noNewlines = false // don't print a trailing newline on ssm get
hideTimestamps = false // don't print timestamps to output for sorting
stripPrefixes = false // don't print prefixes of ssm keys
showHistory = false // print the history of a key
outputCSV = false // output the ssm values to csv
)
app := cli.NewApp()
app.Version = "1.6.0"
app.Usage = "simple ssm param store interface"
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "profile, p",
Usage: "Specify an AWS profile. Optional. Defaults to AWS_PROFILE.",
Destination: &awsProfile,
},
}
app.Commands = []cli.Command{
{
Name: "ls",
Usage: "list param names. ex: ssm ls myapp, ssm ls, ssm ls --secrets myapp",
Flags: []cli.Flag{
cli.BoolFlag{
Name: "secrets",
Usage: "print out parameter values in plaintext",
Destination: &showSecrets,
},
cli.BoolFlag{
Name: "csv",
Usage: "serialize output to csv",
Destination: &outputCSV,
},
cli.BoolFlag{
Name: "hide-ts",
Usage: "prints keys in alphabetical order without timestamps (good for diffs)",
Destination: &hideTimestamps,
},
cli.BoolFlag{
Name: "strip-prefix",
Usage: "strips prefix from the variable (also good for diffs)",
Destination: &stripPrefixes,
},
cli.BoolFlag{
Name: "show-history",
Usage: "if secrets are printed, print all previous versions with it ",
Destination: &showHistory,
},
},
Action: func(c *cli.Context) error {
// create SSM session
cfg, err := config.LoadDefaultConfig(context.Background(), config.WithSharedConfigProfile(awsProfile))
if err != nil {
return err
}
client := ssm.NewFromConfig(cfg)
log.Println("fetching ssm keys")
s := c.Args().First()
// retrieve parameters
keys, err := list(s, showSecrets, !hideTimestamps, stripPrefixes, showHistory, client)
if err != nil {
return err
}
if outputCSV {
w := csv.NewWriter(os.Stdout)
for _, k := range keys {
err = w.Write(k)
if err != nil {
return err
}
}
w.Flush()
return nil
}
for _, key := range keys {
fmt.Println(strings.Join(key, "\t"))
}
return err
},
},
{
Name: "get",
Usage: "prints plaintext ssm value. ex: ssm get /app/prod/my-key",
Flags: []cli.Flag{
cli.BoolFlag{
Name: "n",
Usage: "Do not print a trailing newline",
Destination: &noNewlines,
},
},
Action: func(c *cli.Context) error {
// create SSM session
cfg, err := config.LoadDefaultConfig(context.Background(), config.WithSharedConfigProfile(awsProfile))
if err != nil {
return err
}
client := ssm.NewFromConfig(cfg)
key := c.Args().First()
// fetch key
val, err := get(key, client)
if err != nil {
return err
}
// print (with or without newline)
if noNewlines {
fmt.Print(val)
} else {
fmt.Println(val)
}
return nil
},
},
{
Name: "set",
Usage: "sets ssm k,v pair. overwrites. ex: ssm set /app/prod/version 27",
Action: func(c *cli.Context) error {
// create SSM session
cfg, err := config.LoadDefaultConfig(context.Background(), config.WithSharedConfigProfile(awsProfile))
if err != nil {
return err
}
client := ssm.NewFromConfig(cfg)
// set key value pair
key := c.Args().First()
val := c.Args().Get(1)
err = set(key, val, client)
return err
},
},
{
Name: "rm",
Usage: "removes ssm param. ex: ssm rm /app/prod/param",
Action: func(c *cli.Context) error {
cfg, err := config.LoadDefaultConfig(context.Background(), config.WithSharedConfigProfile(awsProfile))
if err != nil {
return err
}
client := ssm.NewFromConfig(cfg)
key := c.Args().First()
// delete key
err = rm(key, client)
return err
},
},
}
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
// rm deletes a ssm key.
func rm(key string, client *ssm.Client) error {
_, err := client.DeleteParameter(context.Background(), &ssm.DeleteParameterInput{
Name: &key,
})
return err
}
// set sets a ssm key to a value.
func set(key, val string, client *ssm.Client) error {
overwrite := true
ptype := types.ParameterTypeSecureString
tier := types.ParameterTierStandard
if len([]byte(val)) > 4096 {
tier = "Advanced"
}
_, err := client.PutParameter(context.Background(), &ssm.PutParameterInput{
Name: &key,
Value: &val,
Overwrite: &overwrite,
Type: ptype,
Tier: tier,
})
return err
}
// entry is a parameter entry used to format histories.
type entry struct {
t *time.Time
name string
val string
history []string
}
func removePrefix(path string) string {
s := strings.Split(path, "/")
return s[len(s)-1]
}
// fmt returns a formatted string with optional timestamp and parameter prefix.
func (e *entry) fmt(ts, stripPrefix bool) []string {
var name string
if stripPrefix {
name = removePrefix(e.name)
} else {
name = e.name
}
h := strings.Join(e.history, ", ")
if ts {
return []string{e.t.Format("2006-01-02 15:04:05"), name, e.val, h}
}
return []string{name, e.val, h}
}
// history returns the parameter history of a value.
func history(key string, client *ssm.Client) ([]string, error) {
hist := []string{}
max := int32(50)
decrypt := true
in := ssm.GetParameterHistoryInput{MaxResults: &max, Name: &key, WithDecryption: &decrypt}
for {
out, err := client.GetParameterHistory(context.Background(), &in)
if err != nil {
return []string{}, err
}
for _, v := range out.Parameters {
date := *v.LastModifiedDate
hist = append(hist, fmt.Sprintf("(%s, %s)", date.Format("2006-01-02"), *v.Value))
}
if out.NextToken == nil {
break
}
in = ssm.GetParameterHistoryInput{MaxResults: &max, NextToken: out.NextToken, Name: &key, WithDecryption: &decrypt}
}
return hist, nil
}
// list lists a set of parameters matching the substring s.
func list(s string, showValue, ts, stripPrefix, showHistory bool, client *ssm.Client) ([][]string, error) {
var next string
var n int32 = 50
// set name filters for AWS
k := "Name"
filterOption := "Contains"
filter := types.ParameterStringFilter{Key: &k, Option: &filterOption, Values: []string{s}}
var in ssm.DescribeParametersInput
// if filter specified, add name filters
if s != "" {
in = ssm.DescribeParametersInput{
ParameterFilters: []types.ParameterStringFilter{filter},
}
} else {
in = ssm.DescribeParametersInput{}
}
// set n workers based on how many requests may happen
nworkers := 2
if showHistory {
nworkers = 1
}
// blocking semaphore channel to keep concurrency under control
semChan := make(chan struct{}, nworkers)
defer close(semChan)
params := []entry{}
// iterate over results
for {
desc, err := client.DescribeParameters(context.Background(), &in)
if err != nil {
return [][]string{}, err
}
// result channel to store entries from concurrent secret requests
resultChan := make(chan entry, len(desc.Parameters))
defer close(resultChan)
for _, p := range desc.Parameters {
if p.Name != nil {
name := *p.Name
date := p.LastModifiedDate
if showValue {
semChan <- struct{}{}
go func() {
v, err := get(name, client)
if err != nil {
log.Fatal(err)
}
hist := []string{}
if showHistory {
hist, err = history(name, client)
if err != nil {
log.Fatal(err)
}
}
resultChan <- entry{date, name, v, hist}
<-semChan
}()
} else {
resultChan <- entry{date, name, "", []string{}}
}
}
}
for i := 0; i < len(desc.Parameters); i++ {
p := <-resultChan
params = append(params, p)
}
if desc.NextToken != nil {
next = *desc.NextToken
if s != "" {
in = ssm.DescribeParametersInput{NextToken: &next, MaxResults: &n, ParameterFilters: []types.ParameterStringFilter{filter}}
} else {
in = ssm.DescribeParametersInput{NextToken: &next, MaxResults: &n}
}
} else {
break
}
}
if ts {
sort.Slice(params, func(i, j int) bool {
return params[i].t.Before(*params[j].t)
})
} else {
sort.Slice(params, func(i, j int) bool {
return params[i].name < params[j].name
})
}
vals := make([][]string, 0)
for _, p := range params {
vals = append(vals, p.fmt(ts, stripPrefix))
}
return vals, nil
}
// get gets the value of a parameter.
func get(key string, client *ssm.Client) (string, error) {
withDecryption := true
param, err := client.GetParameter(context.Background(), &ssm.GetParameterInput{
Name: &key,
WithDecryption: &withDecryption,
})
if err != nil {
return "", fmt.Errorf("error retrieving key %s: %w", key, err)
}
value := *param.Parameter.Value
return value, nil
}