-
Notifications
You must be signed in to change notification settings - Fork 132
/
block_fastly_service_v1_healthcheck.go
288 lines (259 loc) · 8.41 KB
/
block_fastly_service_v1_healthcheck.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
package fastly
import (
"fmt"
"log"
gofastly "github.com/fastly/go-fastly/v3/fastly"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)
type HealthCheckServiceAttributeHandler struct {
*DefaultServiceAttributeHandler
}
func NewServiceHealthCheck(sa ServiceMetadata) ServiceAttributeDefinition {
return &HealthCheckServiceAttributeHandler{
&DefaultServiceAttributeHandler{
key: "healthcheck",
serviceMetadata: sa,
},
}
}
func (h *HealthCheckServiceAttributeHandler) Process(d *schema.ResourceData, latestVersion int, conn *gofastly.Client) error {
oh, nh := d.GetChange(h.GetKey())
if oh == nil {
oh = new(schema.Set)
}
if nh == nil {
nh = new(schema.Set)
}
oldSet := oh.(*schema.Set)
newSet := nh.(*schema.Set)
setDiff := NewSetDiff(func(resource interface{}) (interface{}, error) {
t, ok := resource.(map[string]interface{})
if !ok {
return nil, fmt.Errorf("resource failed to be type asserted: %+v", resource)
}
return t["name"], nil
})
diffResult, err := setDiff.Diff(oldSet, newSet)
if err != nil {
return err
}
// DELETE removed resources
for _, resource := range diffResult.Deleted {
resource := resource.(map[string]interface{})
opts := gofastly.DeleteHealthCheckInput{
ServiceID: d.Id(),
ServiceVersion: latestVersion,
Name: resource["name"].(string),
}
log.Printf("[DEBUG] Fastly Healthcheck removal opts: %#v", opts)
err := conn.DeleteHealthCheck(&opts)
if errRes, ok := err.(*gofastly.HTTPError); ok {
if errRes.StatusCode != 404 {
return err
}
} else if err != nil {
return err
}
}
// CREATE new resources
for _, resource := range diffResult.Added {
resource := resource.(map[string]interface{})
opts := gofastly.CreateHealthCheckInput{
ServiceID: d.Id(),
ServiceVersion: latestVersion,
Name: resource["name"].(string),
Host: resource["host"].(string),
Path: resource["path"].(string),
CheckInterval: uint(resource["check_interval"].(int)),
ExpectedResponse: uint(resource["expected_response"].(int)),
HTTPVersion: resource["http_version"].(string),
Initial: uint(resource["initial"].(int)),
Method: resource["method"].(string),
Threshold: uint(resource["threshold"].(int)),
Timeout: uint(resource["timeout"].(int)),
Window: uint(resource["window"].(int)),
}
log.Printf("[DEBUG] Create Healthcheck Opts: %#v", opts)
_, err := conn.CreateHealthCheck(&opts)
if err != nil {
return err
}
}
// UPDATE modified resources
//
// NOTE: although the go-fastly API client enables updating of a resource by
// its 'name' attribute, this isn't possible within terraform due to
// constraints in the data model/schema of the resources not having a uid.
for _, resource := range diffResult.Modified {
resource := resource.(map[string]interface{})
opts := gofastly.UpdateHealthCheckInput{
ServiceID: d.Id(),
ServiceVersion: latestVersion,
Name: resource["name"].(string),
}
// only attempt to update attributes that have changed
modified := setDiff.Filter(resource, oldSet)
// NOTE: where we transition between interface{} we lose the ability to
// infer the underlying type being either a uint vs an int. This
// materializes as a panic (yay) and so it's only at runtime we discover
// this and so we've updated the below code to convert the type asserted
// int into a uint before passing the value to gofastly.Uint().
if v, ok := modified["comment"]; ok {
opts.Comment = gofastly.String(v.(string))
}
if v, ok := modified["method"]; ok {
opts.Method = gofastly.String(v.(string))
}
if v, ok := modified["host"]; ok {
opts.Host = gofastly.String(v.(string))
}
if v, ok := modified["path"]; ok {
opts.Path = gofastly.String(v.(string))
}
if v, ok := modified["http_version"]; ok {
opts.HTTPVersion = gofastly.String(v.(string))
}
if v, ok := modified["timeout"]; ok {
opts.Timeout = gofastly.Uint(uint(v.(int)))
}
if v, ok := modified["check_interval"]; ok {
opts.CheckInterval = gofastly.Uint(uint(v.(int)))
}
if v, ok := modified["expected_response"]; ok {
opts.ExpectedResponse = gofastly.Uint(uint(v.(int)))
}
if v, ok := modified["window"]; ok {
opts.Window = gofastly.Uint(uint(v.(int)))
}
if v, ok := modified["threshold"]; ok {
opts.Threshold = gofastly.Uint(uint(v.(int)))
}
if v, ok := modified["initial"]; ok {
opts.Initial = gofastly.Uint(uint(v.(int)))
}
log.Printf("[DEBUG] Update Healthcheck Opts: %#v", opts)
_, err := conn.UpdateHealthCheck(&opts)
if err != nil {
return err
}
}
return nil
}
func (h *HealthCheckServiceAttributeHandler) Read(d *schema.ResourceData, s *gofastly.ServiceDetail, conn *gofastly.Client) error {
log.Printf("[DEBUG] Refreshing Healthcheck for (%s)", d.Id())
healthcheckList, err := conn.ListHealthChecks(&gofastly.ListHealthChecksInput{
ServiceID: d.Id(),
ServiceVersion: s.ActiveVersion.Number,
})
if err != nil {
return fmt.Errorf("[ERR] Error looking up Healthcheck for (%s), version (%v): %s", d.Id(), s.ActiveVersion.Number, err)
}
hcl := flattenHealthchecks(healthcheckList)
if err := d.Set(h.GetKey(), hcl); err != nil {
log.Printf("[WARN] Error setting Healthcheck for (%s): %s", d.Id(), err)
}
return nil
}
func (h *HealthCheckServiceAttributeHandler) Register(s *schema.Resource) error {
s.Schema[h.GetKey()] = &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
// required fields
"name": {
Type: schema.TypeString,
Required: true,
Description: "A unique name to identify this Healthcheck. It is important to note that changing this attribute will delete and recreate the resource",
},
"host": {
Type: schema.TypeString,
Required: true,
Description: "The Host header to send for this Healthcheck",
},
"path": {
Type: schema.TypeString,
Required: true,
Description: "The path to check",
},
// optional fields
"check_interval": {
Type: schema.TypeInt,
Optional: true,
Default: 5000,
Description: "How often to run the Healthcheck in milliseconds. Default `5000`",
},
"expected_response": {
Type: schema.TypeInt,
Optional: true,
Default: 200,
Description: "The status code expected from the host. Default `200`",
},
"http_version": {
Type: schema.TypeString,
Optional: true,
Default: "1.1",
Description: "Whether to use version 1.0 or 1.1 HTTP. Default `1.1`",
},
"initial": {
Type: schema.TypeInt,
Optional: true,
Default: 2,
Description: "When loading a config, the initial number of probes to be seen as OK. Default `2`",
},
"method": {
Type: schema.TypeString,
Optional: true,
Default: "HEAD",
Description: "Which HTTP method to use. Default `HEAD`",
},
"threshold": {
Type: schema.TypeInt,
Optional: true,
Default: 3,
Description: "How many Healthchecks must succeed to be considered healthy. Default `3`",
},
"timeout": {
Type: schema.TypeInt,
Optional: true,
Default: 500,
Description: "Timeout in milliseconds. Default `500`",
},
"window": {
Type: schema.TypeInt,
Optional: true,
Default: 5,
Description: "The number of most recent Healthcheck queries to keep for this Healthcheck. Default `5`",
},
},
},
}
return nil
}
func flattenHealthchecks(healthcheckList []*gofastly.HealthCheck) []map[string]interface{} {
var hl []map[string]interface{}
for _, h := range healthcheckList {
// Convert HealthChecks to a map for saving to state.
nh := map[string]interface{}{
"name": h.Name,
"host": h.Host,
"path": h.Path,
"check_interval": h.CheckInterval,
"expected_response": h.ExpectedResponse,
"http_version": h.HTTPVersion,
"initial": h.Initial,
"method": h.Method,
"threshold": h.Threshold,
"timeout": h.Timeout,
"window": h.Window,
}
// prune any empty values that come from the default string value in structs
for k, v := range nh {
if v == "" {
delete(nh, k)
}
}
hl = append(hl, nh)
}
return hl
}