-
Notifications
You must be signed in to change notification settings - Fork 48
/
index.js
373 lines (338 loc) · 10.7 KB
/
index.js
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
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
/* eslint-disable no-plusplus */
/* eslint-disable no-console */
/* eslint-disable new-cap */
import AWS from 'aws-sdk';
import { awsRegionLocations, logo, dateFormats } from './constants';
const blessed = require('blessed');
const contrib = require('blessed-contrib');
const moment = require('moment');
const program = require('commander');
program.version('0.0.1');
program
.option('-n, --stack-name <stackName>', 'AWS stack name')
.option('-r, --region <region>', 'AWS region')
.option('-t, --start-time <startTime>', 'when to start from')
.option('-p, --period <period>', 'precision of graphs, in seconds')
.parse(process.argv);
const screen = blessed.screen({ smartCSR: true });
const cloudformation = new AWS.CloudFormation({ region: program.region });
const cloudwatch = new AWS.CloudWatch({ region: program.region });
const cloudwatchLogs = new AWS.CloudWatchLogs({ region: program.region });
function sleep(ms) {
return new Promise((resolve) => setTimeout(resolve, ms));
}
function getLambdasForStackName(stackName) {
return cloudformation.listStackResources({ StackName: stackName }).promise();
}
class Main {
constructor() {
this.grid = new contrib.grid({ rows: 12, cols: 12, screen });
this.bar = this.grid.set(4, 6, 4, 3, contrib.bar,
{
label: 'Lambda Duration (most recent)',
barWidth: 6,
barSpacing: 6,
xOffset: 2,
maxHeight: 9,
});
this.table = this.grid.set(0, 6, 4, 6, contrib.table,
{
keys: true,
fg: 'green',
label: 'Lambda Functions',
columnSpacing: 1,
columnWidth: [44, 60],
});
this.invocationsLineGraph = this.grid.set(2, 0, 6, 6, contrib.line,
{
maxY: 0,
label: 'Function Metrics',
showLegend: true,
xPadding: 10,
xLabelPadding: 10,
wholeNumbersOnly: true,
legend: { width: 50 },
});
this.map = this.grid.set(4, 9, 4, 3, contrib.map, { label: `Servers Location (${program.region})` });
this.log = this.grid.set(8, 0, 4, 12, blessed.log,
{
fg: 'green',
selectedFg: 'green',
label: 'Server Log',
interactive: true,
scrollbar: { bg: 'blue' },
mouse: true,
});
this.titleBox = this.grid.set(0, 0, 2, 6, blessed.box, {
tags: true,
content: `${logo
}\n Dev Tools for the Serverless World.`
+ '\n - Select a function from the list on the right',
style: {
fg: 'green',
border: {
fg: 'green',
},
},
});
screen.key(['escape', 'q', 'C-c'], () => process.exit(0));
// fixes https://github.com/yaronn/blessed-contrib/issues/10
screen.on('resize', () => {
this.bar.emit('attach');
this.table.emit('attach');
// errorsLine.emit('attach');
this.titleBox.emit('attach');
this.invocationsLineGraph.emit('attach');
this.map.emit('attach');
this.log.emit('attach');
});
screen.title = 'sls-dev-tools';
this.marker = false;
this.funcName = null;
this.period = program.period || 3600; // 1 hour
this.endTime = new Date();
if (program.startTime) {
// eslint-disable-next-line prefer-destructuring
this.startTime = new Date(program.startTime);
} else {
const dateOffset = (24 * 60 * 60 * 1000); // 1 day
// Round to closest period to make query faster.
this.startTime = new Date(
(Math.round(new Date().getTime() / this.period) * this.period) - dateOffset,
);
}
}
async render() {
await this.table.rows.on('select', (item) => {
[this.funcName] = item.content.split(' ');
this.updateGraphs();
});
setInterval(() => {
this.updateMap();
screen.render();
}, 1000);
setInterval(() => {
this.generateTable();
this.table.focus();
}, 3000);
}
updateMap() {
if (this.marker) {
this.map.addMarker({
...awsRegionLocations[program.region],
color: 'red',
char: 'X',
});
} else {
this.map.clearMarkers();
Object.keys(awsRegionLocations).forEach((key) => {
if (key !== program.region) {
this.map.addMarker({
...awsRegionLocations[key],
color: 'yellow',
char: 'X',
});
}
});
}
this.marker = !this.marker;
screen.render();
}
async generateTable() {
const newData = await getLambdasForStackName(program.stackName, this.setData);
this.data = newData;
const lambdaFunctions = this.data.StackResourceSummaries.filter(
(res) => res.ResourceType === 'AWS::Lambda::Function',
).map((lam) => [lam.PhysicalResourceId, lam.LastUpdatedTimestamp]);
this.table.setData({ headers: ['logical', 'updated'], data: lambdaFunctions });
if (this.funcName) {
this.updateGraphs();
}
screen.render();
}
padInvocationsAndErrorsWithZeros() {
/* For the invocations and errors data in this.data.MetricDataResults, we will add '0' for each
* timestamp that doesn't have an entry. This is to make the graph more readable.
*/
for (let index = 1; index <= 2; index++) {
for (
let timestamp = moment(this.startTime).valueOf();
timestamp < moment(this.endTime).valueOf();
timestamp = moment(timestamp).add(this.period, 'seconds').valueOf()
) {
if (this.data.MetricDataResults[index].Timestamps.every(
(it) => it.valueOf() !== timestamp,
)) {
this.data.MetricDataResults[index].Timestamps.push(new Date(timestamp));
this.data.MetricDataResults[index].Values.push(0);
}
}
}
}
setBarChartData() {
const durations = this.data.MetricDataResults[0];
this.bar.setData({
titles: durations.Timestamps.map((t) => moment(t).format(dateFormats.graphDisplayTime)).slice(-6),
data: durations.Values.map((t) => Math.round(t)).slice(-6),
});
}
setLineGraphData() {
const dateFormat = moment(this.data.MetricDataResults[1]).isAfter(moment().subtract(3, 'days'))
? dateFormats.graphDisplayTime
: dateFormats.graphDisplayDate;
const functionError = {
title: 'errors',
style: { line: 'red' },
x: this.data.MetricDataResults[2].Timestamps.map((d) => moment(d).format(dateFormat)),
y: this.data.MetricDataResults[1].Values,
};
const functionInvocations = {
title: 'invocations',
style: { line: 'green' },
x: this.data.MetricDataResults[2].Timestamps.map((d) => {
const start = moment(d).format(dateFormat);
const end = moment(d).add(this.period, 'seconds').format(dateFormat);
return `${start}-${end}`;
}),
y: this.data.MetricDataResults[2].Values,
};
this.invocationsLineGraph.options.maxY = Math.max(
[...functionInvocations.y, ...functionError.y],
);
this.invocationsLineGraph.setData([functionError, functionInvocations]);
}
async updateGraphs() {
const data = await this.getLambdaMetrics(this.funcName);
this.data = data;
this.padInvocationsAndErrorsWithZeros();
this.sortMetricDataResultsByTimestamp();
this.setBarChartData();
this.setLineGraphData();
this.getLogStreams(`/aws/lambda/${this.funcName}`).then(() => {
screen.render();
});
}
getLogStreams(logGroupName) {
const params = {
logGroupName,
descending: true,
limit: 5,
orderBy: 'LastEventTime',
};
return cloudwatchLogs.describeLogStreams(params, (err, data) => {
if (err) {
console.log(err, err.stack); // an error occurred
} else {
this.getLogEvents(logGroupName, data.logStreams.map((stream) => stream.logStreamName));
}
}).promise();
}
getLogEvents(logGroupName, logStreamNames) {
if (logStreamNames.length === 0) {
this.log.setContent('ERROR: No log streams found for this function.');
return;
}
const params = {
logGroupName,
interleaved: true,
logStreamNames,
limit: 100,
};
cloudwatchLogs.filterLogEvents(params).promise().then((data) => {
const { events } = data;
this.log.setContent('');
events.forEach((event) => { this.log.log(event.message); });
}, (err) => {
console.log(err, err.stack);
});
}
sortMetricDataResultsByTimestamp() {
this.data.MetricDataResults = this.data.MetricDataResults.map((datum) => {
const latest = datum.Timestamps.map((timestamp, index) => (
{ timestamp: moment(timestamp), value: datum.Values[index] }))
.sort((first, second) => (moment(first.timestamp) > moment(second.timestamp) ? 1 : -1));
const returnData = datum;
returnData.Timestamps = latest.map((it) => it.timestamp);
returnData.Values = latest.map((it) => it.value);
return returnData;
});
}
getLambdaMetrics(functionName) {
this.endTime = new Date();
const params = {
StartTime: this.startTime,
EndTime: this.endTime,
MetricDataQueries: [
{
Id: 'duration',
MetricStat: {
Metric: {
Dimensions: [
{
Name: 'FunctionName',
Value: functionName,
},
{
Name: 'Resource',
Value: functionName,
},
],
MetricName: 'Duration',
Namespace: 'AWS/Lambda',
},
Period: this.period,
Stat: 'Maximum',
},
ReturnData: true,
},
{
Id: 'errors',
MetricStat: {
Metric: {
Dimensions: [
{
Name: 'FunctionName',
Value: functionName,
},
{
Name: 'Resource',
Value: functionName,
},
],
MetricName: 'Errors',
Namespace: 'AWS/Lambda',
},
Period: this.period,
Stat: 'Sum',
},
ReturnData: true,
},
{
Id: 'invocations',
MetricStat: {
Metric: {
Dimensions: [
{
Name: 'FunctionName',
Value: functionName,
},
{
Name: 'Resource',
Value: functionName,
},
],
MetricName: 'Invocations',
Namespace: 'AWS/Lambda',
},
Period: this.period,
Stat: 'Sum',
},
ReturnData: true,
},
],
};
return cloudwatch.getMetricData(params).promise();
}
}
new Main().render();
exports.slsDevTools = () => new Main().render();