无法通过node.js从lambda获取Amazon CloudWatch日志
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我想使用AWS.CloudWatchLogs.describeLogStreams获取cloudwatch日志,但返回的响应是httpstatuscode ='undefined',并且没有数据。
我应该如何处理此问题?
我执行以下代码进行调试。
const aws = require('aws-sdk')
exports.handler = async (event, context) =>
const cloudwatchlogs = new aws.CloudWatchLogs();
const params =
logGroupName: '/aws/lambda/test'
var tmp = await cloudwatchlogs.describeLogStreams(params);
console.log(tmp);
;
并获取以下日志。
2020-05-26T22:48:25.869Z 51891acf-302d-4d71-8f3b-b98cab65192d INFO Request
domain: null,
service: Service
config: Config
credentials: [EnvironmentCredentials],
credentialProvider: [CredentialProviderChain],
region: 'ap-northeast-1',
logger: null,
apiVersions: ,
apiVersion: null,
endpoint: 'logs.ap-northeast-1.amazonaws.com',
httpOptions: [Object],
maxRetries: undefined,
maxRedirects: 10,
paramValidation: true,
sslEnabled: true,
s3ForcePathStyle: false,
s3BucketEndpoint: false,
s3DisableBodySigning: true,
s3UsEast1RegionalEndpoint: 'legacy',
s3UseArnRegion: undefined,
computeChecksums: true,
convertResponseTypes: true,
correctClockSkew: false,
customUserAgent: null,
dynamoDbCrc32: true,
systemClockOffset: 0,
signatureVersion: 'v4',
signatureCache: true,
retryDelayOptions: ,
useAccelerateEndpoint: false,
clientSideMonitoring: false,
endpointDiscoveryEnabled: false,
endpointCacheSize: 1000,
hostPrefixEnabled: true,
stsRegionalEndpoints: 'legacy'
,
isGlobalEndpoint: false,
endpoint: Endpoint
protocol: 'https:',
host: 'logs.ap-northeast-1.amazonaws.com',
port: 443,
hostname: 'logs.ap-northeast-1.amazonaws.com',
pathname: '/',
path: '/',
href: 'https://logs.ap-northeast-1.amazonaws.com/'
,
_events: apiCallAttempt: [Array], apiCall: [Array] ,
MONITOR_EVENTS_BUBBLE: [Function: EVENTS_BUBBLE],
CALL_EVENTS_BUBBLE: [Function: CALL_EVENTS_BUBBLE],
_clientId: 1
,
operation: 'describeLogGroups',
params: ,
httpRequest: HttpRequest
method: 'POST',
path: '/',
headers:
'User-Agent': 'aws-sdk-nodejs/2.682.0 linux/v12.16.3 exec-env/AWS_Lambda_nodejs12.x'
,
body: '',
endpoint: Endpoint
protocol: 'https:',
host: 'logs.ap-northeast-1.amazonaws.com',
port: 443,
hostname: 'logs.ap-northeast-1.amazonaws.com',
pathname: '/',
path: '/',
href: 'https://logs.ap-northeast-1.amazonaws.com/',
constructor: [Function]
,
region: 'ap-northeast-1',
_userAgent: 'aws-sdk-nodejs/2.682.0 linux/v12.16.3 exec-env/AWS_Lambda_nodejs12.x'
,
startTime: 2020-05-26T22:48:25.866Z,
response: Response
request: [Circular],
data: null,
error: null,
retryCount: 0,
redirectCount: 0,
httpResponse: HttpResponse
statusCode: undefined,
headers: ,
body: undefined,
streaming: false,
stream: null
,
maxRetries: 3,
maxRedirects: 10
,
_asm: AcceptorStateMachine
currentState: 'validate',
states:
validate: [Object],
build: [Object],
afterBuild: [Object],
sign: [Object],
retry: [Object],
afterRetry: [Object],
send: [Object],
validateResponse: [Object],
extractError: [Object],
extractData: [Object],
restart: [Object],
success: [Object],
error: [Object],
complete: [Object]
,
_haltHandlersOnError: false,
_events:
validate: [
[Function],
[Function],
[Function: VALIDATE_REGION],
[Function: BUILD_IDEMPOTENCY_TOKENS],
[Function: VALIDATE_PARAMETERS]
],
afterBuild: [
[Function],
[Function: SET_CONTENT_LENGTH],
[Function: SET_HTTP_HOST]
],
restart: [ [Function: RESTART] ],
sign: [ [Function], [Function], [Function] ],
validateResponse: [ [Function: VALIDATE_RESPONSE], [Function] ],
send: [ [Function] ],
httpHeaders: [ [Function: HTTP_HEADERS] ],
httpData: [ [Function: HTTP_DATA] ],
httpDone: [ [Function: HTTP_DONE] ],
retry: [
[Function: FINALIZE_ERROR],
[Function: INVALIDATE_CREDENTIALS],
[Function: EXPIRED_SIGNATURE],
[Function: CLOCK_SKEWED],
[Function: REDIRECT],
[Function: RETRY_CHECK],
[Function: API_CALL_ATTEMPT_RETRY]
],
afterRetry: [ [Function] ],
build: [ [Function: buildRequest] ],
extractData: [ [Function: extractData], [Function: extractRequestId] ],
extractError: [ [Function: extractError], [Function: extractRequestId] ],
httpError: [ [Function: ENOTFOUND_ERROR] ],
success: [ [Function: API_CALL_ATTEMPT] ],
complete: [ [Function: API_CALL] ]
,
emit: [Function: emit],
API_CALL_ATTEMPT: [Function: API_CALL_ATTEMPT],
API_CALL_ATTEMPT_RETRY: [Function: API_CALL_ATTEMPT_RETRY],
API_CALL: [Function: API_CALL]
补充:
- 我的lambda函数具有CloudWatchFullAccess策略
- 我可以在cloudwatch控制台中看到此功能的cloudwatch日志。
- 我的lambda函数运行时是Node.js 12.x
答案
我认为这是因为您的函数在获得任何结果之前就已完成。解决此问题的一种方法是使用aws docs:中所示的异步处理程序
模式const aws = require('aws-sdk')
exports.handler = async (event, context) =>
const promise = new Promise(function(resolve, reject)
const cloudwatchlogs = new aws.CloudWatchLogs();
const params =
logGroupName: '/aws/lambda/test'
cloudwatchlogs.describeLogStreams(params, function(err, data)
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
);
)
return promise;
;
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