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Lambda Functions
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console.log('Loading function'); | |
exports.handler = function(event, context) { | |
//console.log('Received event:', JSON.stringify(event, null, 2)); | |
event.Records.forEach(function(record) { | |
// Kinesis data is base64 encoded so decode here | |
var payload = new Buffer(record.kinesis.data, 'base64').toString('ascii'); | |
console.log('Decoded payload:', payload); | |
}); | |
context.succeed("Successfully processed " + event.Records.length + " records."); | |
}; |
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/* | |
This function handles a Slack slash command and echoes the details back to the user. | |
Follow these steps to configure the slash command in Slack: | |
1. Navigate to https://<your-team-domain>.slack.com/services/new | |
2. Search for and select "Slash Commands". | |
3. Enter a name for your command and click "Add Slash Command Integration". | |
4. Copy the token string from the integration settings and use it in the next section. | |
5. After you complete this blueprint, enter the provided API endpoint URL in the URL field. | |
Follow these steps to encrypt your Slack token for use in this function: | |
1. Create a KMS key - http://docs.aws.amazon.com/kms/latest/developerguide/create-keys.html. | |
2. Encrypt the token using the AWS CLI. | |
$ aws kms encrypt --key-id alias/<KMS key name> --plaintext "<COMMAND_TOKEN>" | |
3. Copy the base-64 encoded, encrypted key (CiphertextBlob) to the kmsEncyptedToken variable. | |
4. Give your function's role permission for the kms:Decrypt action. | |
Example: | |
{ | |
"Version": "2012-10-17", | |
"Statement": [ | |
{ | |
"Effect": "Allow", | |
"Action": [ | |
"kms:Decrypt" | |
], | |
"Resource": [ | |
"<your KMS key ARN>" | |
] | |
} | |
] | |
} | |
Follow these steps to complete the configuration of your command API endpoint | |
1. When completing the blueprint configuration select "POST" for method and | |
"Open" for security on the Endpoint Configuration page. | |
2. After completing the function creation, open the newly created API in the | |
API Gateway console. | |
3. Add a mapping template for the x-www-form-urlencoded content type with the | |
following body: { "body": $input.json("$") } | |
4. Deploy the API to the prod stage. | |
5. Update the URL for your Slack slash command with the invocation URL for the | |
created API resource in the prod stage. | |
*/ | |
var AWS = require('aws-sdk'); | |
var qs = require('querystring'); | |
var token, kmsEncyptedToken; | |
kmsEncyptedToken = "<kmsEncryptedToken>"; | |
exports.handler = function (event, context) { | |
if (token) { | |
// Container reuse, simply process the event with the key in memory | |
processEvent(event, context); | |
} else if (kmsEncyptedToken && kmsEncyptedToken !== "<kmsEncryptedToken>") { | |
var encryptedBuf = new Buffer(kmsEncyptedToken, 'base64'); | |
var cipherText = {CiphertextBlob: encryptedBuf}; | |
var kms = new AWS.KMS(); | |
kms.decrypt(cipherText, function (err, data) { | |
if (err) { | |
console.log("Decrypt error: " + err); | |
context.fail(err); | |
} else { | |
token = data.Plaintext.toString('ascii'); | |
processEvent(event, context); | |
} | |
}); | |
} else { | |
context.fail("Token has not been set."); | |
} | |
}; | |
var processEvent = function(event, context) { | |
var body = event.body; | |
var params = qs.parse(body); | |
var requestToken = params.token; | |
if (requestToken !== token) { | |
console.error("Request token (" + requestToken + ") does not match exptected"); | |
context.fail("Invalid request token"); | |
} | |
var user = params.user_name; | |
var command = params.command; | |
var channel = params.channel_name; | |
var commandText = params.text; | |
context.succeed(user + " invoked " + command + " in " + channel + " with the following text: " + commandText); | |
}; |
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var request = require('request'); | |
var util = require('util'); | |
var slackWebhookUrl = '<YOUR_SLACK_WEBHOOK_API_URL>'; | |
exports.handler = function(event, context) { | |
var data = convertModulusWebhook(event); | |
var options = { | |
method: 'post', | |
body: data, | |
json: true, | |
url: slackWebhookUrl | |
}; | |
request(options, context.done); | |
}; | |
/* convert a Modulus webhook into a slack webhook | |
*/ | |
var convertModulusWebhook = function(webhook) { | |
var data = webhook; | |
var text = util.format('%s - %s', data.type, data.project.name); | |
var resp = {}; | |
resp.attachments = []; | |
var info = { | |
'fallback': text, | |
'pretext': text, | |
'color': getStatusColor(data.type), | |
'fields': [] | |
}; | |
info.fields.push(buildCrashAttachment(data)); | |
resp.attachments.push(info); | |
return resp; | |
}; | |
var buildCrashAttachment = function(data) { | |
if (data.type === 'crash' && data.servo) { | |
return { | |
'title': 'Modulus Alert', | |
'text': data.servo.log, | |
'short': false | |
}; | |
} else { | |
return { | |
'title': 'Modulus Alert', | |
'text': data.project.name, | |
'short': false | |
}; | |
} | |
}; | |
/* returns a Slack color depending on the modulus event type. Crash should be red, deploy should be | |
* green, and everything else will be orange. | |
*/ | |
var getStatusColor = function(eventType) { | |
if (eventType === 'crash') { | |
return 'danger'; | |
} else if (eventType === 'deploy') { | |
return 'good'; | |
} else { | |
return 'warning'; | |
} | |
}; |
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