forked from hashicorp/terraform-provider-kubernetes
/
resource_kubernetes_replication_controller.go
322 lines (274 loc) · 10 KB
/
resource_kubernetes_replication_controller.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
package kubernetes
import (
"fmt"
"log"
"time"
"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
api "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
pkgApi "k8s.io/apimachinery/pkg/types"
kubernetes "k8s.io/client-go/kubernetes"
)
func resourceKubernetesReplicationController() *schema.Resource {
return &schema.Resource{
Create: resourceKubernetesReplicationControllerCreate,
Read: resourceKubernetesReplicationControllerRead,
Exists: resourceKubernetesReplicationControllerExists,
Update: resourceKubernetesReplicationControllerUpdate,
Delete: resourceKubernetesReplicationControllerDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Timeouts: &schema.ResourceTimeout{
Create: schema.DefaultTimeout(10 * time.Minute),
Update: schema.DefaultTimeout(10 * time.Minute),
Delete: schema.DefaultTimeout(10 * time.Minute),
},
Schema: map[string]*schema.Schema{
"metadata": namespacedMetadataSchema("replication controller", true),
"spec": {
Type: schema.TypeList,
Description: "Spec defines the specification of the desired behavior of the replication controller. More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status",
Required: true,
MaxItems: 1,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"min_ready_seconds": {
Type: schema.TypeInt,
Description: "Minimum number of seconds for which a newly created pod should be ready without any of its container crashing, for it to be considered available. Defaults to 0 (pod will be considered available as soon as it is ready)",
Optional: true,
Default: 0,
},
"replicas": {
Type: schema.TypeInt,
Description: "The number of desired replicas. Defaults to 1. More info: http://kubernetes.io/docs/user-guide/replication-controller#what-is-a-replication-controller",
Optional: true,
Default: 1,
},
"selector": {
Type: schema.TypeMap,
Description: "A label query over pods that should match the Replicas count. If Selector is empty, it is defaulted to the labels present on the Pod template. Label keys and values that must match in order to be controlled by this replication controller, if empty defaulted to labels on Pod template. More info: http://kubernetes.io/docs/user-guide/labels#label-selectors",
Required: true,
},
"template": {
Type: schema.TypeList,
Description: "Describes the pod that will be created if insufficient replicas are detected. This takes precedence over a TemplateRef. More info: http://kubernetes.io/docs/user-guide/replication-controller#pod-template",
Required: true,
MaxItems: 1,
Elem: &schema.Resource{
Schema: replicationControllerTemplateFieldSpec(),
},
},
},
},
},
},
}
}
func replicationControllerTemplateFieldSpec() map[string]*schema.Schema {
metadata := namespacedMetadataSchemaIsTemplate("replication controller's template", true, true)
// TODO: make this required once the legacy fields are removed
metadata.Computed = true
metadata.Required = false
metadata.Optional = true
templateFields := map[string]*schema.Schema{
"metadata": metadata,
"spec": {
Type: schema.TypeList,
Description: "Spec of the pods managed by the replication controller",
Optional: true, // TODO: make this required once the legacy fields are removed
Computed: true,
MaxItems: 1,
Elem: &schema.Resource{
Schema: podSpecFields(false, false, true),
},
},
}
// Merge deprecated fields and mark them conflicting with the ones to avoid complex mixed use-cases
for k, v := range podSpecFields(true, true, true) {
v.ConflictsWith = []string{"spec.0.template.0.spec", "spec.0.template.0.metadata"}
templateFields[k] = v
}
return templateFields
}
func useDeprecatedSpecFields(d *schema.ResourceData) (deprecatedSpecFieldsExist bool) {
// Check which replication controller template spec fields are used
_, deprecatedSpecFieldsExist = d.GetOkExists("spec.0.template.0.container.0.name")
return
}
func resourceKubernetesReplicationControllerCreate(d *schema.ResourceData, meta interface{}) error {
conn, err := meta.(KubeClientsets).MainClientset()
if err != nil {
return err
}
metadata := expandMetadata(d.Get("metadata").([]interface{}))
spec, err := expandReplicationControllerSpec(d.Get("spec").([]interface{}), useDeprecatedSpecFields(d))
if err != nil {
return err
}
rc := api.ReplicationController{
ObjectMeta: metadata,
Spec: *spec,
}
log.Printf("[INFO] Creating new replication controller: %#v", rc)
out, err := conn.CoreV1().ReplicationControllers(metadata.Namespace).Create(&rc)
if err != nil {
return fmt.Errorf("Failed to create replication controller: %s", err)
}
d.SetId(buildId(out.ObjectMeta))
log.Printf("[DEBUG] Waiting for replication controller %s to schedule %d replicas",
d.Id(), *out.Spec.Replicas)
// 10 mins should be sufficient for scheduling ~10k replicas
err = resource.Retry(d.Timeout(schema.TimeoutCreate),
waitForDesiredReplicasFunc(conn, out.GetNamespace(), out.GetName()))
if err != nil {
return err
}
// We could wait for all pods to actually reach Ready state
// but that means checking each pod status separately (which can be expensive at scale)
// as there's no aggregate data available from the API
log.Printf("[INFO] Submitted new replication controller: %#v", out)
return resourceKubernetesReplicationControllerRead(d, meta)
}
func resourceKubernetesReplicationControllerRead(d *schema.ResourceData, meta interface{}) error {
conn, err := meta.(KubeClientsets).MainClientset()
if err != nil {
return err
}
namespace, name, err := idParts(d.Id())
if err != nil {
return err
}
log.Printf("[INFO] Reading replication controller %s", name)
rc, err := conn.CoreV1().ReplicationControllers(namespace).Get(name, metav1.GetOptions{})
if err != nil {
log.Printf("[DEBUG] Received error: %#v", err)
return err
}
log.Printf("[INFO] Received replication controller: %#v", rc)
err = d.Set("metadata", flattenMetadata(rc.ObjectMeta, d))
if err != nil {
return err
}
spec, err := flattenReplicationControllerSpec(rc.Spec, d, useDeprecatedSpecFields(d))
if err != nil {
return err
}
err = d.Set("spec", spec)
if err != nil {
return err
}
return nil
}
func resourceKubernetesReplicationControllerUpdate(d *schema.ResourceData, meta interface{}) error {
conn, err := meta.(KubeClientsets).MainClientset()
if err != nil {
return err
}
namespace, name, err := idParts(d.Id())
if err != nil {
return err
}
ops := patchMetadata("metadata.0.", "/metadata/", d)
if d.HasChange("spec") {
spec, err := expandReplicationControllerSpec(d.Get("spec").([]interface{}), useDeprecatedSpecFields(d))
if err != nil {
return err
}
ops = append(ops, &ReplaceOperation{
Path: "/spec",
Value: spec,
})
}
data, err := ops.MarshalJSON()
if err != nil {
return fmt.Errorf("Failed to marshal update operations: %s", err)
}
log.Printf("[INFO] Updating replication controller %q: %v", name, string(data))
out, err := conn.CoreV1().ReplicationControllers(namespace).Patch(name, pkgApi.JSONPatchType, data)
if err != nil {
return fmt.Errorf("Failed to update replication controller: %s", err)
}
log.Printf("[INFO] Submitted updated replication controller: %#v", out)
err = resource.Retry(d.Timeout(schema.TimeoutUpdate),
waitForDesiredReplicasFunc(conn, namespace, name))
if err != nil {
return err
}
return resourceKubernetesReplicationControllerRead(d, meta)
}
func resourceKubernetesReplicationControllerDelete(d *schema.ResourceData, meta interface{}) error {
conn, err := meta.(KubeClientsets).MainClientset()
if err != nil {
return err
}
namespace, name, err := idParts(d.Id())
if err != nil {
return err
}
log.Printf("[INFO] Deleting replication controller: %#v", name)
// Drain all replicas before deleting
var ops PatchOperations
ops = append(ops, &ReplaceOperation{
Path: "/spec/replicas",
Value: 0,
})
data, err := ops.MarshalJSON()
if err != nil {
return err
}
_, err = conn.CoreV1().ReplicationControllers(namespace).Patch(name, pkgApi.JSONPatchType, data)
if err != nil {
return err
}
// Wait until all replicas are gone
err = resource.Retry(d.Timeout(schema.TimeoutDelete),
waitForDesiredReplicasFunc(conn, namespace, name))
if err != nil {
return err
}
err = conn.CoreV1().ReplicationControllers(namespace).Delete(name, &deleteOptions)
if err != nil {
return err
}
log.Printf("[INFO] Replication controller %s deleted", name)
d.SetId("")
return nil
}
func resourceKubernetesReplicationControllerExists(d *schema.ResourceData, meta interface{}) (bool, error) {
conn, err := meta.(KubeClientsets).MainClientset()
if err != nil {
return false, err
}
namespace, name, err := idParts(d.Id())
if err != nil {
return false, err
}
log.Printf("[INFO] Checking replication controller %s", name)
_, err = conn.CoreV1().ReplicationControllers(namespace).Get(name, metav1.GetOptions{})
if err != nil {
if statusErr, ok := err.(*errors.StatusError); ok && statusErr.ErrStatus.Code == 404 {
return false, nil
}
log.Printf("[DEBUG] Received error: %#v", err)
}
return true, err
}
func waitForDesiredReplicasFunc(conn *kubernetes.Clientset, ns, name string) resource.RetryFunc {
return func() *resource.RetryError {
rc, err := conn.CoreV1().ReplicationControllers(ns).Get(name, metav1.GetOptions{})
if err != nil {
return resource.NonRetryableError(err)
}
desiredReplicas := *rc.Spec.Replicas
log.Printf("[DEBUG] Current number of labelled replicas of %q: %d (of %d)\n",
rc.GetName(), rc.Status.FullyLabeledReplicas, desiredReplicas)
if rc.Status.FullyLabeledReplicas == desiredReplicas {
return nil
}
return resource.RetryableError(fmt.Errorf("Waiting for %d replicas of %q to be scheduled (%d)",
desiredReplicas, rc.GetName(), rc.Status.FullyLabeledReplicas))
}
}