forked from aws/amazon-ecs-agent
-
Notifications
You must be signed in to change notification settings - Fork 0
/
api_client.go
345 lines (307 loc) · 11.9 KB
/
api_client.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
// Copyright 2014-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file is distributed
// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language governing
// permissions and limitations under the License.
package api
import (
"errors"
"net/http"
"runtime"
"time"
"github.com/aws/amazon-ecs-agent/agent/ecs_client/model/ecs"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/docker/docker/pkg/system"
"github.com/aws/amazon-ecs-agent/agent/config"
"github.com/aws/amazon-ecs-agent/agent/ec2"
"github.com/aws/amazon-ecs-agent/agent/logger"
"github.com/aws/amazon-ecs-agent/agent/utils"
)
var log = logger.ForModule("api client")
// ECSClient is an interface over the ECSSDK interface which abstracts away some
// details around constructing the request and reading the response down to the
// parts the agent cares about.
// For example, the ever-present 'Cluster' member is abstracted out so that it
// may be configured once and used throughout transparently.
type ECSClient interface {
// RegisterContainerInstance calculates the appropriate resources, creates
// the default cluster if necessary, and returns the registered
// ContainerInstanceARN if successful. Supplying a non-empty container
// instance ARN allows a container instance to update its registered
// resources.
RegisterContainerInstance(existingContainerInstanceArn string, attributes []string) (string, error)
// SubmitTaskStateChange sends a state change and returns an error
// indicating if it was submitted
SubmitTaskStateChange(change TaskStateChange) error
// SubmitContainerStateChange sends a state change and returns an error
// indicating if it was submitted
SubmitContainerStateChange(change ContainerStateChange) error
// DiscoverPollEndpoint takes a ContainerInstanceARN and returns the
// endpoint at which this Agent should contact ACS
DiscoverPollEndpoint(containerInstanceArn string) (string, error)
// DiscoverTelemetryEndpoint takes a ContainerInstanceARN and returns the
// endpoint at which this Agent should contact Telemetry Service
DiscoverTelemetryEndpoint(containerInstanceArn string) (string, error)
}
// ECSSDK is an interface that specifies the subset of the AWS Go SDK's ECS
// client that the Agent uses. This interface is meant to allow injecting a
// mock for testing.
type ECSSDK interface {
CreateCluster(*ecs.CreateClusterInput) (*ecs.CreateClusterOutput, error)
RegisterContainerInstance(*ecs.RegisterContainerInstanceInput) (*ecs.RegisterContainerInstanceOutput, error)
DiscoverPollEndpoint(*ecs.DiscoverPollEndpointInput) (*ecs.DiscoverPollEndpointOutput, error)
}
type ECSSubmitStateSDK interface {
SubmitContainerStateChange(*ecs.SubmitContainerStateChangeInput) (*ecs.SubmitContainerStateChangeOutput, error)
SubmitTaskStateChange(*ecs.SubmitTaskStateChangeInput) (*ecs.SubmitTaskStateChangeOutput, error)
}
// ApiECSClient implements ECSClient
type ApiECSClient struct {
credentialProvider *credentials.Credentials
config *config.Config
standardClient ECSSDK
submitStateChangeClient ECSSubmitStateSDK
ec2metadata ec2.EC2MetadataClient
}
// SetSDK overrides the SDK to the given one. This is useful for injecting a
// test implementation
func (client *ApiECSClient) SetSDK(sdk ECSSDK) {
client.standardClient = sdk
}
// SetSubmitStateChangeSDK overrides the SDK to the given one. This is useful
// for injecting a test implementation
func (client *ApiECSClient) SetSubmitStateChangeSDK(sdk ECSSubmitStateSDK) {
client.submitStateChangeClient = sdk
}
const (
ECS_SERVICE = "ecs"
EcsMaxReasonLength = 255
RoundtripTimeout = 5 * time.Second
)
func NewECSClient(credentialProvider *credentials.Credentials, config *config.Config, httpClient *http.Client, ec2MetadataClient ec2.EC2MetadataClient) ECSClient {
var ecsConfig aws.Config
ecsConfig.Credentials = credentialProvider
ecsConfig.Region = &config.AWSRegion
ecsConfig.HTTPClient = httpClient
if config.APIEndpoint != "" {
ecsConfig.Endpoint = &config.APIEndpoint
}
standardClient := ecs.New(session.New(&ecsConfig))
submitStateChangeClient := newSubmitStateChangeClient(&ecsConfig)
return &ApiECSClient{
credentialProvider: credentialProvider,
config: config,
standardClient: standardClient,
submitStateChangeClient: submitStateChangeClient,
ec2metadata: ec2MetadataClient,
}
}
func getCpuAndMemory() (int64, int64) {
memInfo, err := system.ReadMemInfo()
mem := memInfo.MemTotal / 1024 / 1024 // MiB
if err != nil {
log.Error("Unable to get memory info", "err", err)
mem = 0
}
cpu := runtime.NumCPU() * 1024
return int64(cpu), mem
}
// CreateCluster creates a cluster from a given name and returns its arn
func (client *ApiECSClient) CreateCluster(clusterName string) (string, error) {
resp, err := client.standardClient.CreateCluster(&ecs.CreateClusterInput{ClusterName: &clusterName})
if err != nil {
log.Crit("Could not register", "err", err)
return "", err
}
log.Info("Created a cluster!", "clusterName", clusterName)
return *resp.Cluster.ClusterName, nil
}
func (client *ApiECSClient) RegisterContainerInstance(containerInstanceArn string, attributes []string) (string, error) {
clusterRef := client.config.Cluster
// If our clusterRef is empty, we should try to create the default
if clusterRef == "" {
clusterRef = config.DefaultClusterName
defer func() {
// Update the config value to reflect the cluster we end up in
client.config.Cluster = clusterRef
}()
// Attempt to register without checking existence of the cluster so we don't require
// excess permissions in the case where the cluster already exists and is active
containerInstanceArn, err := client.registerContainerInstance(clusterRef, containerInstanceArn, attributes)
if err == nil {
return containerInstanceArn, nil
}
// If trying to register fails, try to create the cluster before calling
// register again
clusterRef, err = client.CreateCluster(clusterRef)
if err != nil {
return "", err
}
}
return client.registerContainerInstance(clusterRef, containerInstanceArn, attributes)
}
func (client *ApiECSClient) registerContainerInstance(clusterRef string, containerInstanceArn string, attributes []string) (string, error) {
registerRequest := ecs.RegisterContainerInstanceInput{Cluster: &clusterRef}
if containerInstanceArn != "" {
registerRequest.ContainerInstanceArn = &containerInstanceArn
}
for _, attribute := range attributes {
registerRequest.Attributes = append(registerRequest.Attributes, &ecs.Attribute{
Name: aws.String(attribute),
})
}
instanceIdentityDoc, err := client.ec2metadata.ReadResource(ec2.INSTANCE_IDENTITY_DOCUMENT_RESOURCE)
iidRetrieved := true
if err != nil {
log.Error("Unable to get instance identity document", "err", err)
iidRetrieved = false
instanceIdentityDoc = []byte{}
}
strIid := string(instanceIdentityDoc)
registerRequest.InstanceIdentityDocument = &strIid
instanceIdentitySignature := []byte{}
if iidRetrieved {
instanceIdentitySignature, err = client.ec2metadata.ReadResource(ec2.INSTANCE_IDENTITY_DOCUMENT_SIGNATURE_RESOURCE)
if err != nil {
log.Error("Unable to get instance identity signature", "err", err)
}
}
strIidSig := string(instanceIdentitySignature)
registerRequest.InstanceIdentityDocumentSignature = &strIidSig
// Micro-optimization, the pointer to this is used multiple times below
integerStr := "INTEGER"
cpu, mem := getCpuAndMemory()
mem = mem - int64(client.config.ReservedMemory)
cpuResource := ecs.Resource{
Name: utils.Strptr("CPU"),
Type: &integerStr,
IntegerValue: &cpu,
}
memResource := ecs.Resource{
Name: utils.Strptr("MEMORY"),
Type: &integerStr,
IntegerValue: &mem,
}
portResource := ecs.Resource{
Name: utils.Strptr("PORTS"),
Type: utils.Strptr("STRINGSET"),
StringSetValue: utils.Uint16SliceToStringSlice(client.config.ReservedPorts),
}
udpPortResource := ecs.Resource{
Name: utils.Strptr("PORTS_UDP"),
Type: utils.Strptr("STRINGSET"),
StringSetValue: utils.Uint16SliceToStringSlice(client.config.ReservedPortsUDP),
}
resources := []*ecs.Resource{&cpuResource, &memResource, &portResource, &udpPortResource}
registerRequest.TotalResources = resources
resp, err := client.standardClient.RegisterContainerInstance(®isterRequest)
if err != nil {
log.Error("Could not register", "err", err)
return "", err
}
log.Info("Registered!")
return *resp.ContainerInstance.ContainerInstanceArn, nil
}
func (client *ApiECSClient) SubmitTaskStateChange(change TaskStateChange) error {
if change.Status == TaskStatusNone {
log.Warn("SubmitTaskStateChange called with an invalid change", "change", change)
return errors.New("SubmitTaskStateChange called with an invalid change")
}
if change.Status != TaskRunning && change.Status != TaskStopped {
log.Debug("Not submitting unsupported upstream task state", "state", change.Status.String())
// Not really an error
return nil
}
status := change.Status.String()
_, err := client.submitStateChangeClient.SubmitTaskStateChange(&ecs.SubmitTaskStateChangeInput{
Cluster: &client.config.Cluster,
Task: &change.TaskArn,
Status: &status,
Reason: &change.Reason,
})
if err != nil {
log.Warn("Could not submit a task state change", "err", err)
return err
}
return nil
}
func (client *ApiECSClient) SubmitContainerStateChange(change ContainerStateChange) error {
req := ecs.SubmitContainerStateChangeInput{
Cluster: &client.config.Cluster,
Task: &change.TaskArn,
ContainerName: &change.ContainerName,
}
if change.Reason != "" {
if len(change.Reason) > EcsMaxReasonLength {
trimmed := change.Reason[0:EcsMaxReasonLength]
req.Reason = &trimmed
} else {
req.Reason = &change.Reason
}
}
stat := change.Status.String()
if stat == "DEAD" {
stat = "STOPPED"
}
if stat != "STOPPED" && stat != "RUNNING" {
log.Info("Not submitting not supported upstream container state", "state", stat)
return nil
}
req.Status = &stat
if change.ExitCode != nil {
exitCode := int64(*change.ExitCode)
req.ExitCode = &exitCode
}
networkBindings := make([]*ecs.NetworkBinding, len(change.PortBindings))
for i, binding := range change.PortBindings {
hostPort := int64(binding.HostPort)
containerPort := int64(binding.ContainerPort)
bindIP := binding.BindIp
protocol := binding.Protocol.String()
networkBindings[i] = &ecs.NetworkBinding{
BindIP: &bindIP,
ContainerPort: &containerPort,
HostPort: &hostPort,
Protocol: &protocol,
}
}
req.NetworkBindings = networkBindings
_, err := client.submitStateChangeClient.SubmitContainerStateChange(&req)
if err != nil {
log.Warn("Could not submit a container state change", "change", change, "err", err)
return err
}
return nil
}
func (client *ApiECSClient) DiscoverPollEndpoint(containerInstanceArn string) (string, error) {
resp, err := client.standardClient.DiscoverPollEndpoint(&ecs.DiscoverPollEndpointInput{
ContainerInstance: &containerInstanceArn,
Cluster: &client.config.Cluster,
})
if err != nil {
return "", err
}
return *resp.Endpoint, nil
}
func (client *ApiECSClient) DiscoverTelemetryEndpoint(containerInstanceArn string) (string, error) {
resp, err := client.standardClient.DiscoverPollEndpoint(&ecs.DiscoverPollEndpointInput{
ContainerInstance: &containerInstanceArn,
Cluster: &client.config.Cluster,
})
if err != nil {
return "", err
}
if resp.TelemetryEndpoint == nil {
return "", errors.New("No telemetry endpoint returned; nil")
}
return *resp.TelemetryEndpoint, nil
}