├── .gitignore ├── .npmignore ├── .travis.yml ├── LICENSE ├── README.md ├── package-lock.json ├── package.json ├── src ├── client.coffee ├── index.coffee └── watcher.coffee └── test ├── client.coffee ├── index.coffee └── watcher.coffee /.gitignore: -------------------------------------------------------------------------------- 1 | lib/ 2 | node_modules/ 3 | .DS_Store 4 | temp/ 5 | .nyc_output 6 | coverage 7 | -------------------------------------------------------------------------------- /.npmignore: -------------------------------------------------------------------------------- 1 | node_modules/ 2 | npm-debug.log 3 | .DS_Store 4 | .gitignore 5 | .travis.yml 6 | temp/ 7 | .nyc_output 8 | coverage 9 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: node_js 2 | sudo: false 3 | node_js: 4 | - "10" 5 | - "9" 6 | - "8" 7 | - "7" 8 | - "6" 9 | env: 10 | - CXX="g++-4.8" CC="gcc-4.8" 11 | addons: 12 | apt: 13 | sources: 14 | - ubuntu-toolchain-r-test 15 | packages: 16 | - gcc-4.8 17 | - g++-4.8 18 | - clang 19 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2013, node-etcd authors 2 | All rights reserved. 3 | 4 | Redistribution and use in source and binary forms, with or without 5 | modification, are permitted provided that the following conditions are met: 6 | * Redistributions of source code must retain the above copyright 7 | notice, this list of conditions and the following disclaimer. 8 | * Redistributions in binary form must reproduce the above copyright 9 | notice, this list of conditions and the following disclaimer in the 10 | documentation and/or other materials provided with the distribution. 11 | * Neither the name of the authors nor the 12 | names of its contributors may be used to endorse or promote products 13 | derived from this software without specific prior written permission. 14 | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 | DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 19 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # node-etcd 2 | 3 | A nodejs library for [ETCD v2](https://coreos.com/etcd/docs/latest/v2/api.html), written in coffee-script. 4 | 5 | [![Travis](https://img.shields.io/travis/stianeikeland/node-etcd.svg)](https://travis-ci.org/stianeikeland/node-etcd) 6 | 7 | [![npm](https://img.shields.io/npm/v/node-etcd.svg)](https://www.npmjs.com/package/node-etcd) 8 | 9 | ## Install 10 | 11 | For nodes >= 6.x: 12 | 13 | ``` 14 | $ npm install node-etcd 15 | ``` 16 | 17 | For nodes 4.x <= node < 6.x: 18 | 19 | ``` 20 | $ npm install node-etcd@6 21 | ``` 22 | 23 | For 0.10.x <= nodejs <= 4.x and iojs: 24 | 25 | ``` 26 | $ npm install node-etcd@5.1.0 27 | ``` 28 | 29 | For nodejs == 0.8: 30 | 31 | ``` 32 | $ npm install node-etcd@3.0.2 33 | ``` 34 | 35 | ## Changes 36 | - 7.0.0 37 | - Fixing vulnerabilities 38 | - Drop support for nodejs version 4 &4 39 | - 6.0.0 40 | - Migrate from underscore to lodash for performance / @derektbrown 41 | - Updated package versions / @derektbrown 42 | - Update deasync call for newer node versions / @derektbrown 43 | - Add istanbul coverage reporting / @derektbrown 44 | 45 | - 5.1.0 46 | - Upgrade deasync dep (caused build problems on newer node) #67 / @jefflembeck 47 | - Upgrade request dep (security vulnerability) #71 / @esatterwhite 48 | - Sync functions no longer mutate input opts. 49 | - 5.0.3 50 | - Fix bug #56 (exception when calling mkdir with no options or callback) 51 | - 5.0.2 52 | - Update deasync dependency, possible fix for #47. 53 | - 5.0.1 54 | - Was forced to publish 5.0.0 as 5.0.1 because of previous beta tag. 55 | - 5.0.0 56 | - Supports basic auth, timeout, etc. See options. 57 | - **Breaking**: Constructor changes (see below) 58 | - **Breaking**: Must provide https url to use https 59 | - **Breaking**: Uses new default port 2379. 60 | - 4.2.1 61 | - Newer deasync fixes issues with iojs 3.3.0 and nodejs 4.0.0. 62 | - 4.1.0 63 | - Bumps [request](https://github.com/request/request) library version to 64 | v2.60.0, this solves an issue with HTTP proxies. `HTTP_PROXY` and `NO_PROXY` 65 | env variables should now work as expected for all requests. See issue #40 66 | - 4.0.2 67 | - 307 redirects from etcd 0.4.x clusters when using SSL didn't work properly 68 | because of a change in the underlying request library. See issue #39 69 | - 4.0.1 70 | - Minor fixes for syncronous operations, better handling of server failure. 71 | - 4.0.0 72 | - Adds support for synchronous operations (@brockwood) - See 73 | [Synchronous Operations](#synchronous-operations). 74 | - Adds support for iojs. 75 | - Drops support for nodejs 0.8 (use v3.x.x). 76 | - Upgrade dependencies. 77 | - 3.0.2 - Handle cluster leader election periods better (etcd will disconnect us 78 | and reject new connections until a new leader is chosen). The client will now 79 | retry 3 times with exp backoff if it believes a cluster election is in 80 | progress. Retry count is controllable via the `{ maxRetries: x }` option for a 81 | request. (npm failed on me and I had to publish as 3.0.2) 82 | - 3.0.0 - Added cluster support, library now accepts a list of servers to 83 | connect to, see constructor changes below. All requests now return a 84 | cancellation token, meaning you can cancel requests by calling .cancel() or 85 | .abort(). This release might break something if you've previously depended on 86 | the leaky abstraction to the request library (request object from request 87 | library was returned on all api calls - this has been replaced by the 88 | cancellation token - the current request is still available under .req on the 89 | token if you really need it.). 90 | - 2.1.5 - Watcher: try to resync if etcd reports cleared index 91 | - 2.1.4 - Don't wait before reconnecting if Etcd server times out our watcher. 92 | - 2.1.3 - Etcd sends an empty response on timeout in recent versions. Parsing 93 | the empty message caused watcher to emit error. Now it reconnects instead. 94 | - 2.1.2 - Exponential backoff (retry), fix spinning reconnect on error. (@ptte) 95 | - 2.1.1 - Increase request pool.maxSockets to 100 96 | - 2.1.0 - Use proper error objects instead of strings for errors. 97 | - 2.0.10 - Fix error in documentation 98 | - 2.0.9 - Added .post() alias of .create(). Added .compareAndDelete() (for etcd v0.3.0) 99 | - 2.0.8 - Watchers can be canceled. In-order keys using #create(). Raw requests using #raw(). 100 | - 2.0.7 - Avoid calling callback if callback not given. 101 | - 2.0.6 - Refactoring, fix responsehandler error. 102 | - 2.0.5 - Undo use of 'x-etcd-index', this refers to global state. 103 | - 2.0.4 - Use 'x-etcd-index' for index when watching a key. 104 | - 2.0.3 - Watcher supports options. Watcher emits etcd action type. 105 | - 2.0.2 - Mkdir and rmdir. Fix watcher for v2 api. 106 | - 2.0.1 - Watch, delete and stats now use new v2 api. Added testAndSet convenience method. 107 | - 2.0.0 - Basic support for etcd protocol v2. set, get, del now supports options. 108 | - 0.6.1 - Fixes issue #10, missing response caused error when server connection failed / server responded incorrectly. 109 | - 0.6.0 - Watcher now emits 'error' on invalid responses. 110 | 111 | ## Basic usage 112 | 113 | ```javascript 114 | var Etcd = require('node-etcd'); 115 | var etcd = new Etcd(); 116 | etcd.set("key", "value"); 117 | etcd.get("key", console.log); 118 | ``` 119 | 120 | Callbacks follows the default (error, result) nodejs convention: 121 | 122 | ```javascript 123 | function callback(err, res) { 124 | console.log("Error: ", err); 125 | console.log("Return: ", res); 126 | } 127 | etcd.get("key", callback); 128 | // Error: null 129 | // Return: { action: 'get', node: { key: '/key', value: 'value', modifiedIndex: 4, createdIndex: 4 } } 130 | ``` 131 | 132 | ## Methods 133 | 134 | ### Etcd(hosts = ['127.0.0.1:2379'], [options]) 135 | 136 | Create a new etcd client for a single host etcd setup 137 | 138 | ```javascript 139 | etcd = new Etcd(); 140 | etcd = new Etcd("127.0.0.1:2379"); 141 | etcd = new Etcd("http://127.0.0.1:2379"); 142 | etcd = new Etcd("https://127.0.0.1:2379"); 143 | etcd = new Etcd(["http://127.0.0.1:2379"]); 144 | ``` 145 | 146 | ### Etcd(hosts, [options]) 147 | 148 | Create a new etcd client for a clustered etcd setup. Client will connect to 149 | servers in random order. On failure it will try the next server. When all 150 | servers have failed it will callback with error. If it suspects the cluster is 151 | in leader election mode it will retry up to 3 times with exp backoff. Number of 152 | retries can be controlled by adding `{ maxRetries: x }` as an option to requests. 153 | 154 | ```javascript 155 | etcd = new Etcd(['127.0.0.1:2379','192.168.1.1:2379']); 156 | etcd = new Etcd(['http://127.0.0.1:2379','http://192.168.1.1:2379']); 157 | ``` 158 | 159 | ### .set(key, value = null, [options], [callback]) 160 | 161 | Set key to value, or create key/directory. 162 | 163 | ```javascript 164 | etcd.set("key"); 165 | etcd.set("key", "value"); 166 | etcd.set("key", "value", console.log); 167 | etcd.set("key", "value", { ttl: 60 }, console.log); 168 | etcd.set("key", "value", { maxRetries: 3 }, console.log); 169 | ``` 170 | 171 | Available options include: 172 | 173 | - `ttl` (time to live in seconds) 174 | - `prevValue` (previous value, for compare and swap) 175 | - `prevExist` (existance test, for compare and swap) 176 | - `prevIndex` (previous index, for compare and swap) 177 | 178 | Will create a directory when used without value (value=null): `etcd.set("directory/");` 179 | 180 | ### .compareAndSwap(key, value, oldvalue, [options], [callback]) 181 | 182 | Convenience method for test and set (set with {prevValue: oldvalue}) 183 | 184 | ```javascript 185 | etcd.compareAndSwap("key", "newvalue", "oldvalue"); 186 | etcd.compareAndSwap("key", "newValue", "oldValue", options, console.log); 187 | ``` 188 | 189 | Alias: `.testAndSet()` 190 | 191 | ### .get(key, [options], [callback]) 192 | 193 | Get a key or path. 194 | 195 | ```javascript 196 | etcd.get("key", console.log); 197 | etcd.get("key", { recursive: true }, console.log); 198 | ``` 199 | 200 | Available options include: 201 | 202 | - `recursive` (bool, list all values in directory recursively) 203 | - `wait` (bool, wait for changes to key) 204 | - `waitIndex` (wait for changes after given index) 205 | 206 | ### .del(key, [options], [callback]) 207 | 208 | Delete a key or path 209 | 210 | ```javascript 211 | etcd.del("key"); 212 | etcd.del("key", console.log); 213 | etcd.del("key/", { recursive: true }, console.log); 214 | ``` 215 | 216 | Available options include: 217 | 218 | - `recursive` (bool, delete recursively) 219 | 220 | Alias: `.delete()` 221 | 222 | ### .compareAndDelete(key, oldvalue, [options], [callback]) 223 | 224 | Convenience method for test and delete (delete with {prevValue: oldvalue}) 225 | 226 | ```javascript 227 | etcd.compareAndDelete("key", "oldvalue"); 228 | etcd.compareAndDelete("key", "oldValue", options, console.log); 229 | ``` 230 | 231 | Alias: `.testAndDelete()` 232 | 233 | ### .mkdir(dir, [options], [callback]) 234 | 235 | Create a directory 236 | 237 | ```javascript 238 | etcd.mkdir("dir"); 239 | etcd.mkdir("dir", console.log); 240 | etcd.mkdir("dir/", options, console.log); 241 | ``` 242 | 243 | ### .rmdir(dir, [options], [callback]) 244 | 245 | Remove a directory 246 | 247 | ```javascript 248 | etcd.rmdir("dir"); 249 | etcd.rmdir("dir", console.log); 250 | etcd.rmdir("dir/", { recursive: true }, console.log); 251 | ``` 252 | 253 | Available options include: 254 | 255 | - `recursive` (bool, delete recursively) 256 | 257 | ### .create(path, value, [options], [callback]) 258 | 259 | Atomically create in-order keys. 260 | 261 | ```javascript 262 | etcd.create("queue", "first") 263 | etcd.create("queue", "next", console.log) 264 | ``` 265 | 266 | Alias: `.post()` 267 | 268 | ### .watch(key, [options], [callback]) 269 | 270 | This is a convenience method for get with `{wait: true}`. 271 | 272 | ```javascript 273 | etcd.watch("key"); 274 | etcd.watch("key", console.log); 275 | ``` 276 | 277 | The watch command is pretty low level, it does not handle reconnects or 278 | timeouts (Etcd will disconnect you after 5 minutes). Use the `.watcher()` below 279 | if you do not wish to handle this yourself. 280 | 281 | ### .watchIndex(key, index, [options], callback) 282 | 283 | This is a convenience method for get with `{wait: true, waitIndex: index}`. 284 | 285 | ```javascript 286 | etcd.watchIndex("key", 7, console.log); 287 | ``` 288 | 289 | See `.watch()` above. 290 | 291 | ### .watcher(key, [index], [options]) 292 | 293 | Returns an eventemitter for watching for changes on a key 294 | 295 | ```javascript 296 | watcher = etcd.watcher("key"); 297 | watcher.on("change", console.log); // Triggers on all changes 298 | watcher.on("set", console.log); // Triggers on specific changes (set ops) 299 | watcher.on("delete", console.log); // Triggers on delete. 300 | watcher2 = etcd.watcher("key", null, {recursive: true}); 301 | watcher2.on("error", console.log); 302 | ``` 303 | 304 | You can cancel a watcher by calling `.stop()`. 305 | 306 | Signals: 307 | - `change` - emitted on value change 308 | - `reconnect` - emitted on reconnect 309 | - `error` - emitted on invalid content 310 | - `` - the etcd action that triggered the watcher (ex: set, delete). 311 | - `stop` - watcher was canceled. 312 | - `resync` - watcher lost sync (server cleared and outdated the index). 313 | 314 | It will handle reconnects and timeouts for you, it will also resync (best 315 | effort) if it loses sync with Etcd (Etcd only keeps 1000 items in its event 316 | history - for high frequency setups it's possible to fall behind). 317 | 318 | Use the `.watch()` command in you need more direct control. 319 | 320 | ### .raw(method, key, value, options, callback) 321 | 322 | Bypass the API and do raw queries. 323 | Method must be one of: PUT, GET, POST, PATCH, DELETE 324 | 325 | ```javascript 326 | etcd.raw("GET", "v2/stats/leader", null, {}, callback) 327 | etcd.raw("PUT", "v2/keys/key", "value", {}, callback) 328 | ``` 329 | 330 | Remember to provide the full path, without any leading '/' 331 | 332 | ### .machines(callback) 333 | 334 | Returns information about etcd nodes in the cluster 335 | 336 | ```javascript 337 | etcd.machines(console.log); 338 | ``` 339 | 340 | ### .leader(callback) 341 | 342 | Return the leader in the cluster 343 | 344 | ```javascript 345 | etcd.leader(console.log); 346 | ``` 347 | 348 | ### .leaderStats(callback) 349 | 350 | Return statistics about cluster leader 351 | 352 | ```javascript 353 | etcd.leaderStats(console.log); 354 | ``` 355 | 356 | ### .selfStats(callback) 357 | 358 | Return statistics about connected etcd node 359 | 360 | ```javascript 361 | etcd.selfStats(console.log); 362 | ``` 363 | 364 | ## Synchronous operations 365 | 366 | The library supports a set of basic synchronous/blocking operations that can be useful during 367 | program startup (used like [fs.readFileSync](http://nodejs.org/api/fs.html#fs_fs_readfilesync_filename_options)). 368 | 369 | Synchronous functions perform the etcd request immediately (blocking) and return the following: 370 | 371 | ```javascript 372 | { 373 | err // Error message or null if request completed successfully 374 | body // Body of the message or null if error 375 | headers // Headers from the response 376 | } 377 | ``` 378 | 379 | ### .setSync(key, value = null, [options]) 380 | 381 | Synchronously set key to value, or create key/directory. 382 | 383 | ```javascript 384 | etcd.setSync("key"); 385 | etcd.setSync("key", "value"); 386 | etcd.setSync("key", "value", { ttl: 60 }); 387 | etcd.setSync("key", "value", { maxRetries: 3 }); 388 | ``` 389 | 390 | Same options and function as .set(). 391 | 392 | ### .getSync(key, [options]) 393 | 394 | Get a key or path. 395 | 396 | ```javascript 397 | etcd.getSync("key"); 398 | etcd.getSync("key", { recursive: true }); 399 | ``` 400 | 401 | ### .delSync(key, [options]) 402 | 403 | Synchronously delete a key or path 404 | 405 | ```javascript 406 | etcd.delSync("key"); 407 | etcd.delSync("key/", { recursive: true }); 408 | ``` 409 | 410 | The available options are the same as .del() above. 411 | 412 | ### .mkdirSync(dir, [options]) 413 | 414 | Synchronously create a directory 415 | 416 | ```javascript 417 | etcd.mkdirSync("dir"); 418 | etcd.mkdirSync("dir/", options); 419 | ``` 420 | 421 | ### .rmdirSync(dir, [options]) 422 | 423 | Synchronously remove a directory 424 | 425 | ```javascript 426 | etcd.rmdirSync("dir"); 427 | etcd.rmdirSync("dir/", { recursive: true }); 428 | ``` 429 | 430 | The available options are the same as .rmdir() above. 431 | 432 | ## Aborting a request 433 | 434 | All async requests will return a cancellation token, to abort a request, do 435 | the following: 436 | 437 | ```javascript 438 | var token = etcd.get("key", console.log); 439 | token.abort() // also aliased as token.cancel() 440 | 441 | console.log("Request is cancelled: ", token.isAborted()); 442 | ``` 443 | 444 | Note that there are no guarantees that aborted write operations won't have 445 | affected server state before they were aborted. They only guarantee here is that 446 | you won't get any callbacks from the request after calling `.abort()`. 447 | 448 | ## SSL support 449 | 450 | Provide `ca`, `cert`, `key` as options. Remember to use `https`-url. 451 | 452 | ```javascript 453 | var fs = require('fs'); 454 | 455 | var options = { 456 | ca: fs.readFileSync('ca.pem'), 457 | cert: fs.readFileSync('cert.pem'), 458 | key: fs.readFileSync('key.pem') 459 | }; 460 | 461 | var etcdssl = new Etcd("https://localhost:2379", options); 462 | ``` 463 | 464 | ## Basic auth 465 | 466 | Pass a hash containing username and password as auth option to use basic auth. 467 | 468 | ```javascript 469 | var auth = { 470 | user: "username", 471 | pass: "password" 472 | }; 473 | 474 | var etcd = new Etcd("localhost:2379", { auth: auth }); 475 | ``` 476 | 477 | ## Constructor options 478 | 479 | Pass in a hash after server in the constructor to set options. Some useful constructor options include: 480 | 481 | - `timeout` - Integer request timeout in milliseconds to wait for server response. 482 | - `ca` - Ca certificate 483 | - `cert` - Client certificate 484 | - `key` - Client key 485 | - `passphrase` - Client key passphrase 486 | - `auth` - A hash containing `{user: "username", pass: "password"}` for basic auth. 487 | 488 | ```javascript 489 | var etcd = new Etcd("127.0.0.1:2379", { timeout: 1000, ... });' 490 | ``` 491 | 492 | ## Debugging 493 | 494 | Nodejs `console.log`/`console.dir` truncates output to a couple of levels - 495 | often hiding nested errors. Use `util.inspect` to show inner errors. 496 | 497 | ```javascript 498 | etcd.get('key', function(err, val) { 499 | console.log(require('util').inspect(err, true, 10)); 500 | }); 501 | 502 | //{ [Error: All servers returned error] 503 | // [stack]: [Getter/Setter], 504 | // [message]: 'All servers returned error', 505 | // errors: 506 | // [ { server: 'https://localhost:2379', 507 | // httperror: 508 | // { [Error: Hostname/IP doesn't match certificate's altnames: "Host: localhost. is not cert's CN: undefined"] 509 | // [stack]: [Getter/Setter], 510 | // [message]: 'Hostname/IP doesn\'t match certificate\'s altnames: "Host: localhost. is not cert\'s CN: undefined"', 511 | // reason: 'Host: localhost. is not cert\'s CN: undefined', 512 | // host: 'localhost.', 513 | // cert: 514 | // { subject: { C: 'USA', O: 'etcd-ca', OU: 'CA' }, 515 | // issuer: { C: 'USA', O: 'etcd-ca', OU: 'CA' } } }, 516 | // httpstatus: undefined, 517 | // httpbody: undefined, 518 | // response: undefined, 519 | // timestamp: Sun Dec 27 2015 23:05:15 GMT+0100 (CET) }, 520 | // [length]: 1 ], 521 | // retries: 0 } 522 | ``` 523 | 524 | ## FAQ: 525 | 526 | - Are there any order of execution guarantees when doing multiple requests without using callbacks? 527 | - No, order of execution is up to NodeJS and the network. Requests run from a connection pool, meaning that if one request is delayed for some reason they'll arrive at the server out of order. Use callbacks (and maybe even a nice [async](https://github.com/caolan/async) callback handling library for convenient syntax) if ordering is important to prevent race conditions. 528 | -------------------------------------------------------------------------------- /package-lock.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "node-etcd", 3 | "version": "7.0.0", 4 | "lockfileVersion": 1, 5 | "requires": true, 6 | "dependencies": { 7 | "@babel/code-frame": { 8 | "version": "7.0.0-beta.51", 9 | "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0-beta.51.tgz", 10 | "integrity": "sha1-vXHZsZKvl435FYKdOdQJRFZDmgw=", 11 | "dev": true, 12 | "requires": { 13 | "@babel/highlight": "7.0.0-beta.51" 14 | } 15 | }, 16 | "@babel/generator": { 17 | "version": "7.0.0-beta.51", 18 | "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.0.0-beta.51.tgz", 19 | "integrity": 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"http://github.com/stianeikeland/node-etcd.git" 8 | }, 9 | "licenses": [ 10 | { 11 | "type": "BSD 3-Clause", 12 | "url": "http://opensource.org/licenses/BSD-3-Clause" 13 | } 14 | ], 15 | "maintainers": [ 16 | { 17 | "name": "Stian Eikeland", 18 | "email": "stian@eikeland.se", 19 | "web": "http://eikeland.se/" 20 | } 21 | ], 22 | "contribuitors": [ 23 | { 24 | "name": "Stian Eikeland", 25 | "url": "https://github.com/stianeikeland" 26 | }, 27 | { 28 | "name": "Derek Brown", 29 | "email": "mail@derektbrown.com", 30 | "url": "derektbrown.com" 31 | }, 32 | { 33 | "name": "Jon Morehouse", 34 | "email": "morehousej09@gmail.com", 35 | "url": "https://github.com/jonmorehouse" 36 | }, 37 | { 38 | "name": "Bryan Rockwood", 39 | "email": "bryan.rockwood@c2fo.com", 40 | "url": "https://github.com/brockwood" 41 | } 42 | ], 43 | "engines": { 44 | "node": ">= 6.0.0" 45 | }, 46 | "main": "lib/index.js", 47 | "scripts": { 48 | "build": "node_modules/.bin/coffee --bare --compile --output lib/ src/*.coffee", 49 | "prepublish": "node_modules/.bin/coffee --bare --compile --output lib/ src/*.coffee", 50 | "test": "node_modules/.bin/mocha --require coffee-coverage/register-istanbul --compilers coffee:coffee-script/register test/", 51 | "coverage": "node_modules/.bin/nyc npm test", 52 | "watch": "node_modules/.bin/mocha --compilers coffee:coffee-script/register --watch" 53 | }, 54 | "nyc": { 55 | "check-coverage": true, 56 | "include": [ 57 | "src/**/*.js" 58 | ] 59 | }, 60 | "dependencies": { 61 | "deasync": "^0.1.13", 62 | "lodash": "^4.17.10", 63 | "request": "^2.87.0", 64 | "url-parse": "^1.4.3" 65 | }, 66 | "devDependencies": { 67 | "coffee-coverage": "2.0.1", 68 | "coffee-script": "1.12.7", 69 | "mocha": "^4.0.0", 70 | "nock": "^9.4.4", 71 | "nyc": "^12.0.0", 72 | "should": "11.2.1", 73 | "simple-mock": "0.8.0" 74 | }, 75 | "keywords": [ 76 | "etcd", 77 | "raft" 78 | ] 79 | } 80 | -------------------------------------------------------------------------------- /src/client.coffee: -------------------------------------------------------------------------------- 1 | request = require 'request' 2 | deasync = require 'deasync' 3 | _ = require 'lodash' 4 | 5 | 6 | # Default options for request library 7 | defaultRequestOptions = 8 | pool: 9 | maxSockets: 100 10 | followAllRedirects: true 11 | 12 | defaultClientOptions = 13 | maxRetries: 3 14 | 15 | 16 | # CancellationToken to abort a request 17 | class CancellationToken 18 | constructor: (@servers, @maxRetries, @retries = 0, @errors = []) -> 19 | @aborted = false 20 | 21 | setRequest: (req) => 22 | @req = req 23 | 24 | isAborted: () => 25 | @aborted 26 | 27 | abort: () => 28 | @aborted = true 29 | @req.abort() if @req? 30 | 31 | cancel: @::abort 32 | wasAborted: @::isAborted 33 | 34 | # HTTP Client for connecting to etcd servers 35 | class Client 36 | 37 | constructor: (@hosts, @options, @sslopts) -> 38 | @syncmsg = {} 39 | 40 | execute: (method, options, callback) => 41 | opt = _.defaults (_.clone options), @options, defaultRequestOptions, { method: method } 42 | opt.clientOptions = _.defaults opt.clientOptions, defaultClientOptions 43 | 44 | servers = _.shuffle @hosts 45 | token = new CancellationToken servers, opt.clientOptions.maxRetries 46 | syncResp = @_multiserverHelper servers, opt, token, callback 47 | if options.synchronous is true 48 | return syncResp 49 | else 50 | return token 51 | 52 | 53 | put: (options, callback) => @execute "PUT", options, callback 54 | get: (options, callback) => @execute "GET", options, callback 55 | post: (options, callback) => @execute "POST", options, callback 56 | patch: (options, callback) => @execute "PATCH", options, callback 57 | delete: (options, callback) => @execute "DELETE", options, callback 58 | 59 | # Multiserver (cluster) executer 60 | _multiserverHelper: (servers, options, token, callback) => 61 | host = _.first(servers) 62 | options.url = "#{host}#{options.path}" 63 | 64 | return if token.isAborted() # Aborted by user? 65 | 66 | if not host? # No servers left? 67 | return @_retry token, options, callback if @_shouldRetry token 68 | return @_error token, callback 69 | 70 | reqRespHandler = (err, resp, body) => 71 | return if token.isAborted() 72 | 73 | if @_isHttpError err, resp 74 | token.errors.push 75 | server: host 76 | httperror: err 77 | httpstatus: resp?.statusCode 78 | httpbody: resp?.body 79 | response: resp 80 | timestamp: new Date() 81 | 82 | # Recurse: 83 | return @_multiserverHelper _.drop(servers), options, token, callback 84 | 85 | # Deliver response 86 | @_handleResponse err, resp, body, callback 87 | 88 | syncRespHandler = (err, body, headers) => 89 | options.syncdone = true 90 | @syncmsg = 91 | err: err 92 | body: body 93 | headers: headers 94 | callback = syncRespHandler if options.synchronous is true 95 | 96 | req = @_doRequest options, reqRespHandler 97 | token.setRequest req 98 | 99 | if options.synchronous is true and options.syncdone is undefined 100 | options.syncdone = false 101 | deasync.loopWhile(() => return !options.syncdone); 102 | delete options.syncdone 103 | return @syncmsg 104 | else 105 | return req 106 | 107 | 108 | _doRequest: (options, reqRespHandler) -> 109 | request options, reqRespHandler 110 | 111 | 112 | _retry: (token, options, callback) => 113 | doRetry = () => 114 | @_multiserverHelper token.servers, options, token, callback 115 | waitTime = @_waitTime token.retries 116 | token.retries += 1 117 | setTimeout doRetry, waitTime 118 | 119 | 120 | _waitTime: (retries) -> 121 | return 1 if process.env.RUNNING_UNIT_TESTS is 'true' 122 | ### !pragma no-coverage-next ### 123 | return 100 * Math.pow 16, retries 124 | 125 | 126 | _shouldRetry: (token) => 127 | token.retries < token.maxRetries and @_isPossibleLeaderElection token.errors 128 | 129 | 130 | # All tries (all servers, all retries) failed 131 | _error: (token, callback) -> 132 | error = new Error 'All servers returned error' 133 | error.errors = token.errors 134 | error.retries = token.retries 135 | callback error if callback 136 | 137 | 138 | # If all servers reject connect or return raft error it's possible the 139 | # cluster is in leader election mode. 140 | _isPossibleLeaderElection: (errors) -> 141 | checkError = (e) -> 142 | e?.httperror?.code in ['ECONNREFUSED', 'ECONNRESET'] or 143 | e?.httpbody?.errorCode in [300, 301] or 144 | /Not current leader/.test e?.httpbody 145 | errors? and _.every errors, checkError 146 | 147 | 148 | _isHttpError: (err, resp) -> 149 | err or (resp?.statusCode? and resp.statusCode >= 500) 150 | 151 | 152 | _handleResponse: (err, resp, body, callback) -> 153 | return if not callback? 154 | if body?.errorCode? # http ok, but etcd gave us an error 155 | error = new Error body?.message || 'Etcd error' 156 | error.errorCode = body.errorCode 157 | error.error = body 158 | callback error, "", (resp?.headers or {}) 159 | else 160 | callback null, body, (resp?.headers or {}) 161 | 162 | 163 | exports = module.exports = Client 164 | -------------------------------------------------------------------------------- /src/index.coffee: -------------------------------------------------------------------------------- 1 | _ = require 'lodash' 2 | Watcher = require './watcher' 3 | Client = require './client' 4 | HttpsAgent = (require 'https').Agent 5 | URL = require 'url-parse' 6 | 7 | # Etcd client for etcd protocol version 2 8 | class Etcd 9 | 10 | # Constructor, set etcd host and port. 11 | # For https: provide {ca, crt, key} as sslopts. 12 | # constructor: (hosts = ["http://127.0.0.1:2379"], options = {}) -> 13 | constructor: (hosts = "127.0.0.1:2379", options = {}) -> 14 | @hosts = @_cleanHostList hosts 15 | @client = new Client(@hosts, options, null) 16 | 17 | # Set key to value 18 | # Usage: 19 | # .set("key", "value", callback) 20 | # .set("key", "value", {prevValue: "oldvalue"}, callback) 21 | set: (key, value, options, callback) -> 22 | [options, callback] = @_argParser options, callback 23 | opt = @_prepareOpts ("keys/" + @_stripSlashPrefix key), "/v2", value, options 24 | @client.put opt, callback 25 | 26 | # Set key to value synchronously 27 | # Usage: 28 | # .set("key", "value") 29 | # .set("key", "value", {prevValue: "oldvalue"}) 30 | setSync: (key, value, options = {}) -> 31 | this.set key, value, @_synchronousOpts(options) 32 | 33 | # Get value of key 34 | # Usage: 35 | # .get("key", callback) 36 | # .get("key", {recursive: true}, callback) 37 | get: (key, options, callback) -> 38 | [options, callback] = @_argParser options, callback 39 | opt = @_prepareOpts ("keys/" + @_stripSlashPrefix key), "/v2", null, options 40 | @client.get opt, callback 41 | 42 | # Synchronously get value of key 43 | # Usage: 44 | # .get("key") 45 | # .get("key", {recursive: true}) 46 | getSync: (key, options = {}) -> 47 | this.get key, @_synchronousOpts(options) 48 | 49 | # Create a key (atomic in order) 50 | # Usage: 51 | # .create("path", "value", callback) 52 | # .create("path", "value", options, callback) 53 | create: (dir, value, options, callback) -> 54 | [options, callback] = @_argParser options, callback 55 | opt = @_prepareOpts ("keys/" + @_stripSlashPrefix dir), "/v2", value, options 56 | @client.post opt, callback 57 | 58 | post: @::create 59 | 60 | 61 | # Delete a key 62 | # Usage: 63 | # .del("key", callback) 64 | # .del("key", {recursive: true}, callback) 65 | # .delete("key", callback) 66 | del: (key, options, callback) -> 67 | [options, callback] = @_argParser options, callback 68 | opt = @_prepareOpts ("keys/" + @_stripSlashPrefix key), "/v2", null, options 69 | @client.delete opt, callback 70 | 71 | delete: @::del 72 | 73 | # Synchronous delete a key 74 | # Usage: 75 | # .del("key") 76 | # .del("key", {recursive: true})) 77 | delSync: (key, options = {}) -> 78 | this.del key, @_synchronousOpts(options) 79 | 80 | # Make a directory 81 | # Usage: 82 | # .mkdir("dir", callback) 83 | # .mkdir("dir", options, callback) 84 | mkdir: (dir, options, callback) -> 85 | [options, callback] = @_argParser options, callback 86 | options.dir = true 87 | @set dir, null, options, callback 88 | 89 | # Synchronously make a directory 90 | # Usage: 91 | # .mkdir("dir") 92 | # .mkdir("dir", options) 93 | mkdirSync: (dir, options = {}) -> 94 | this.mkdir dir, @_synchronousOpts(options) 95 | 96 | # Remove a directory 97 | # Usage: 98 | # .rmdir("dir", callback) 99 | # .rmdir("dir", {recursive: true}, callback) 100 | rmdir: (dir, options, callback) -> 101 | [options, callback] = @_argParser options, callback 102 | options.dir = true 103 | @del dir, options, callback 104 | 105 | # Synchronously remove a directory 106 | # Usage: 107 | # .rmdir("dir") 108 | # .rmdir("dir", {recursive: true}) 109 | rmdirSync: (dir, options = {}) -> 110 | this.rmdir dir, @_synchronousOpts(options) 111 | 112 | # Compare and swap value if unchanged 113 | # Usage: 114 | # .compareAndSwap("key", "newValue", "oldValue", callback) 115 | # .compareAndSwap("key", "newValue", "oldValue", options, callback) 116 | # .testAndSet("key", "newValue", "oldValue", options, callback) 117 | compareAndSwap: (key, value, oldvalue, options, callback) -> 118 | [options, callback] = @_argParser options, callback 119 | options ?= {} 120 | options.prevValue = oldvalue 121 | 122 | @set key, value, options, callback 123 | 124 | testAndSet: @::compareAndSwap 125 | 126 | 127 | # Compare and delete if value is unchanged 128 | # Usage: 129 | # .compareAndDelete("key", "oldValue", options, callback) 130 | compareAndDelete: (key, oldvalue, options, callback) -> 131 | [options, callback] = @_argParser options, callback 132 | options ?= {} 133 | options.prevValue = oldvalue 134 | 135 | @del key, options, callback 136 | 137 | testAndDelete: @::compareAndDelete 138 | 139 | 140 | # Execute a raw etcd query 141 | # Where method is one of: PUT, GET, POST, PATCH, DELETE 142 | # 143 | # Usage: 144 | # .raw("METHOD", "path", "value", options, callback) 145 | # .raw("GET", "v2/stats/leader", null, {}, callback) 146 | # .raw("PUT", "v2/keys/key", "value", {}, callback) 147 | raw: (method, key, value, options, callback) -> 148 | [options, callback] = @_argParser options, callback 149 | opt = @_prepareOpts key, "", value, options 150 | @client.execute method, opt, callback 151 | 152 | 153 | # Watch for value changes on a key 154 | watch: (key, options, callback) -> 155 | [options, callback] = @_argParser options, callback 156 | options ?= {} 157 | options.wait = true 158 | 159 | @get key, options, callback 160 | 161 | 162 | # Watch for value changes on a key since a specific index 163 | watchIndex: (key, index, options, callback) -> 164 | [options, callback] = @_argParser options, callback 165 | options ?= {} 166 | options.waitIndex = index 167 | 168 | @watch key, options, callback 169 | 170 | 171 | # Returns an eventemitter that watches a key, emits 'change' on value change 172 | # or 'reconnect' when trying to recover from errors. 173 | watcher: (key, index = null, options = {}) => 174 | return new Watcher this, key, index, options 175 | 176 | 177 | # Get the etcd cluster machines (server) 178 | machines: (callback) -> 179 | opt = @_prepareOpts "keys/_etcd/machines" 180 | @client.get opt, callback 181 | 182 | 183 | # List servers this etcd client will try to connect to 184 | getHosts: () -> 185 | _.clone(@hosts) 186 | 187 | 188 | # Get the current cluster leader 189 | leader: (callback) -> 190 | opt = @_prepareOpts "leader" 191 | @client.get opt, callback 192 | 193 | 194 | # Get statistics about the leader 195 | leaderStats: (callback) -> 196 | opt = @_prepareOpts "stats/leader" 197 | @client.get opt, callback 198 | 199 | 200 | # Get statistics about the currently connected entity 201 | selfStats: (callback) -> 202 | opt = @_prepareOpts "stats/self" 203 | @client.get opt, callback 204 | 205 | 206 | # Get version of etcd 207 | version: (callback) -> 208 | opt = @_prepareOpts "version", "" 209 | @client.get opt, callback 210 | 211 | 212 | # Strip the prefix slash if set 213 | _stripSlashPrefix: (key) -> 214 | key.replace /^\//, '' 215 | 216 | _synchronousOpts: (options) -> 217 | _.extend {}, options, { synchronous: true } 218 | 219 | # Prepare request options 220 | _prepareOpts: (path, apiVersion = "/v2", value = null, allOpts = {}) -> 221 | # serverprotocol = if @sslopts? then "https" else "http" 222 | 223 | queryString = _.omit allOpts, 'maxRetries', 'synchronous' 224 | 225 | clientOptions = _.pick allOpts, 'maxRetries' 226 | 227 | opt = { 228 | path: "#{apiVersion}/#{path}" 229 | # serverprotocol: serverprotocol 230 | json: true 231 | qs: queryString 232 | clientOptions: clientOptions 233 | synchronous: allOpts.synchronous 234 | form: { value: value } if value? 235 | agentOptions: @sslopts if @sslopts? 236 | } 237 | 238 | 239 | # Swap callback and options if no options was given. 240 | _argParser: (options = {}, callback) -> 241 | if typeof options is 'function' 242 | [{}, options] 243 | else 244 | [options, callback] 245 | 246 | # Make sure hosts is a list, make sure all have protocol added 247 | # defaults to http and remove trailing slash 248 | _cleanHostList: (hosts) -> 249 | hostlist = if _.isArray(hosts) then hosts else [hosts] 250 | hostlist.map (host) -> 251 | host = 'http://' + host if host.indexOf('http') is -1 252 | url = new URL(host) 253 | url.href.replace /\/$/, "" # Trailing slash 254 | 255 | 256 | exports = module.exports = Etcd 257 | -------------------------------------------------------------------------------- /src/watcher.coffee: -------------------------------------------------------------------------------- 1 | {EventEmitter} = require 'events' 2 | 3 | # A eventemitter for watching changes on a given key for etcd. 4 | # Emits: 5 | # 'change' - on value change 6 | # 'reconnect' - on errors/timeouts 7 | # '' - the etcd action that triggered the watcher (set, delete, etc) 8 | # 9 | # Automatically reconnects and backs off on errors. 10 | # 11 | class Watcher extends EventEmitter 12 | 13 | constructor: (@etcd, @key, @index = null, @options = {}) -> 14 | @stopped = false 15 | @retryAttempts = 0 16 | @_watch() 17 | 18 | 19 | stop: () => 20 | @stopped = true 21 | @request.abort() 22 | @emit 'stop', "Watcher for '#{@key}' aborted." 23 | 24 | 25 | _watch: () => 26 | if @index is null 27 | @request = @etcd.watch @key, @options, @_respHandler 28 | else 29 | @request = @etcd.watchIndex @key, @index, @options, @_respHandler 30 | 31 | 32 | _error: (err) => 33 | # Something went wrong, most likely on the network, 34 | # maybe disconnected, or similar. 35 | error = new Error 'Connection error, reconnecting.' 36 | error.error = err 37 | error.reconnectCount = @retryAttempts 38 | @emit 'reconnect', error 39 | @_retry() 40 | 41 | 42 | _missingValue: (headers) => 43 | # Etcd sent us an empty response, it seems to do this when 44 | # it times out a watching client. 45 | error = new Error 'Etcd timed out watcher, reconnecting.' 46 | error.headers = headers 47 | @retryAttempts = 0 48 | @emit 'reconnect', error 49 | @_watch() 50 | 51 | 52 | _valueChanged: (val, headers) => 53 | # Valid data received, value was changed. 54 | @retryAttempts = 0 55 | @index = val.node.modifiedIndex + 1 56 | @emit 'change', val, headers 57 | @emit val.action, val, headers if val.action? 58 | @_watch() 59 | 60 | 61 | _unexpectedData: (val, headers) => 62 | # Unexpected data received 63 | error = new Error 'Received unexpected response' 64 | error.response = val; 65 | @emit 'error', error 66 | @_retry() 67 | 68 | 69 | _resync: (err) => 70 | @index = err.error.index 71 | @retryAttempts = 0 72 | @emit 'resync', err 73 | @_watch() 74 | 75 | 76 | _respHandler: (err, val, headers) => 77 | return if @stopped 78 | 79 | if err?.errorCode is 401 and err.error?.index? 80 | @_resync err 81 | else if err 82 | @_error err 83 | else if headers?['x-etcd-index']? and not val? 84 | @_missingValue headers 85 | else if val?.node?.modifiedIndex? 86 | @_valueChanged val, headers 87 | else 88 | @_unexpectedData val, headers 89 | 90 | 91 | _retry: () => 92 | timeout = (Math.pow(2,@retryAttempts)*300) + (Math.round(Math.random() * 1000)) 93 | setTimeout @_watch, timeout 94 | @retryAttempts++ 95 | 96 | 97 | exports = module.exports = Watcher 98 | -------------------------------------------------------------------------------- /test/client.coffee: -------------------------------------------------------------------------------- 1 | should = require 'should' 2 | nock = require 'nock' 3 | Client = require '../src/client.coffee' 4 | 5 | describe 'Client', -> 6 | 7 | client = new Client 8 | 9 | # TODO: Fix these tests.. I've been stupid and tested implementation details, not api.. 10 | describe '#_handleResponse()', -> 11 | 12 | # it 'fails on http error', -> 13 | # client._handleResponse 'error', '', '', (err) -> 14 | # err.error.should.equal 'error' 15 | 16 | it 'should use error objects for errors', -> 17 | client._handleResponse null, 'resp', {errorCode: 100}, (err) -> 18 | err.should.be.an.instanceOf Error 19 | 20 | it 'fails on etcd error', -> 21 | client._handleResponse null, "resp", {errorCode: 100}, (err) -> 22 | err.error.errorCode.should.equal 100 23 | 24 | it 'succeeds on no errors', -> 25 | client._handleResponse null, "resp", "data", (_, val) -> 26 | val.should.equal "data" 27 | 28 | it 'passthrough any headers set in response', -> 29 | client._handleResponse null, {headers: {a: "b"}}, "data", (e, v, headers) -> 30 | headers.a.should.equal "b" 31 | 32 | it 'sets empty object as header if none received', -> 33 | client._handleResponse null, null, "data", (e, v, headers) -> 34 | headers.should.be.an.Object 35 | Object.keys(headers).should.be.empty 36 | 37 | it 'should not fail if callback is not given', -> 38 | client._handleResponse null, 'resp', 'body' 39 | -------------------------------------------------------------------------------- /test/index.coffee: -------------------------------------------------------------------------------- 1 | should = require 'should' 2 | nock = require 'nock' 3 | simple = require 'simple-mock' 4 | Etcd = require '../src/index.coffee' 5 | 6 | 7 | 8 | # Set env var to skip timeouts 9 | process.env.RUNNING_UNIT_TESTS = true 10 | 11 | # Helpers 12 | 13 | getNock = (host = 'http://127.0.0.1:2379') -> 14 | nock host 15 | 16 | 17 | beforeEach () -> 18 | nock.cleanAll() 19 | 20 | # Tests for utility functions 21 | 22 | describe 'Utility', -> 23 | 24 | etcd = new Etcd 25 | 26 | describe '#_stripSlashPrefix()', -> 27 | it 'should strip prefix-/ from key', -> 28 | etcd._stripSlashPrefix("/key/").should.equal("key/") 29 | etcd._stripSlashPrefix("key/").should.equal("key/") 30 | 31 | describe '#_prepareOpts()', -> 32 | it 'should return default request options', -> 33 | etcd._prepareOpts('keypath/key').should.containEql { 34 | json: true 35 | path: '/v2/keypath/key' 36 | } 37 | 38 | 39 | describe 'Connecting', -> 40 | 41 | mock = (host = 'http://127.0.0.1:2379/') -> 42 | nock(host) 43 | .get('/v2/keys/key') 44 | .reply(200, '{"action":"GET","key":"/key","value":"value","index":1}') 45 | 46 | it 'should support empty constructor (localhost:2379)', (done) -> 47 | etcd = new Etcd 48 | m = mock() 49 | etcd.get 'key', (err, val) -> 50 | m.isDone().should.be.true 51 | done err, val 52 | 53 | it 'should support string as connect host', (done) -> 54 | etcd = new Etcd "testhost.com:4009" 55 | m = mock("http://testhost.com:4009") 56 | etcd.get 'key', (err, val) -> 57 | m.isDone().should.be.true 58 | done err, val 59 | 60 | it 'should support string prefixed by http:// as host', (done) -> 61 | etcd = new Etcd "http://testhost.com:4009" 62 | m = mock("http://testhost.com:4009") 63 | etcd.get 'key', (err, val) -> 64 | m.isDone().should.be.true 65 | done err, val 66 | 67 | it 'should support string postfixed by / as host', (done) -> 68 | etcd = new Etcd "http://testhost.com:4009/" 69 | m = mock("http://testhost.com:4009") 70 | etcd.get 'key', (err, val) -> 71 | m.isDone().should.be.true 72 | done err, val 73 | 74 | it 'should support array of strings as host', (done) -> 75 | etcd = new Etcd ["http://testhost.com:4009"] 76 | m = mock("http://testhost.com:4009") 77 | etcd.get 'key', (err, val) -> 78 | m.isDone().should.be.true 79 | done err, val 80 | 81 | it 'should support https strings', (done) -> 82 | etcd = new Etcd ["https://testhost.com:1000"] 83 | m = mock("https://testhost.com:1000") 84 | etcd.get 'key', (err, val) -> 85 | m.isDone().should.be.true 86 | done err, val 87 | 88 | 89 | describe 'Basic auth', -> 90 | 91 | it 'should support basic auth', (done) -> 92 | auth = 93 | user: "username" 94 | pass: "password" 95 | etcd = new Etcd "localhost:2379", { auth: auth } 96 | 97 | m = nock("http://localhost:2379") 98 | .get("/v2/keys/key") 99 | .basicAuth( 100 | user: "username", 101 | pass: "password" 102 | ) 103 | .reply(200) 104 | 105 | etcd.get 'key', (err, val) -> 106 | m.isDone().should.be.true 107 | done err, val 108 | 109 | 110 | describe 'Basic functions', -> 111 | 112 | etcd = new Etcd 113 | 114 | checkVal = (done) -> 115 | (err, val) -> 116 | val.should.containEql { value: "value" } 117 | done err, val 118 | 119 | describe '#get()', -> 120 | it 'should return entry from etcd', (done) -> 121 | getNock() 122 | .get('/v2/keys/key') 123 | .reply(200, '{"action":"GET","key":"/key","value":"value","index":1}') 124 | etcd.get 'key', checkVal done 125 | 126 | it 'should send options to etcd as request url', (done) -> 127 | getNock() 128 | .get('/v2/keys/key?recursive=true') 129 | .reply(200, '{"action":"GET","key":"/key","value":"value","index":1}') 130 | etcd.get 'key', { recursive: true }, checkVal done 131 | 132 | it 'should callback with error on error', (done) -> 133 | getNock() 134 | .get('/v2/keys/key') 135 | .reply(404, {"errorCode": 100, "message": "Key not found"}) 136 | etcd.get 'key', (err, val) -> 137 | err.should.be.instanceOf Error 138 | err.error.errorCode.should.equal 100 139 | err.message.should.equal "Key not found" 140 | done() 141 | 142 | describe '#getSync()', -> 143 | it 'should synchronously return entry from etcd', (done) -> 144 | getNock() 145 | .get('/v2/keys/key') 146 | .reply(200, '{"action":"GET","key":"/key","value":"value","index":1}') 147 | val = etcd.getSync 'key' 148 | doneCheck = checkVal done 149 | doneCheck val.err, val.body 150 | 151 | it 'should synchronously return with error on error', (done) -> 152 | getNock() 153 | .get('/v2/keys/key') 154 | .reply(404, {"errorCode": 100, "message": "Key not found"}) 155 | val = etcd.getSync 'key' 156 | val.err.should.be.instanceOf Error 157 | val.err.error.errorCode.should.equal 100 158 | val.err.message.should.equal "Key not found" 159 | done() 160 | 161 | 162 | describe '#set()', -> 163 | it 'should put to etcd', (done) -> 164 | getNock() 165 | .put('/v2/keys/key', { value: "value" }) 166 | .reply(200, '{"action":"SET","key":"/key","prevValue":"value","value":"value","index":1}') 167 | etcd.set 'key', 'value', checkVal done 168 | 169 | it 'should send options to etcd as request url', (done) -> 170 | getNock() 171 | .put('/v2/keys/key?prevValue=oldvalue', { value: "value"}) 172 | .reply(200, '{"action":"SET","key":"/key","prevValue":"oldvalue","value":"value","index":1}') 173 | etcd.set 'key', 'value', { prevValue: "oldvalue" }, checkVal done 174 | 175 | it 'should follow 307 redirects', (done) -> 176 | (nock 'http://127.0.0.1:4002') 177 | .put('/v2/keys/key', { value: "value" }) 178 | .reply(200, '{"action":"SET","key":"/key","prevValue":"value","value":"value","index":1}') 179 | 180 | (nock 'http://127.0.0.1:2379') 181 | .put('/v2/keys/key', { value: "value" }) 182 | .reply(307, "", { location: "http://127.0.0.1:4002/v2/keys/key" }) 183 | 184 | etcd.set 'key', 'value', checkVal done 185 | 186 | describe '#setSync()', -> 187 | it 'should synchronously put to etcd', (done) -> 188 | getNock() 189 | .put('/v2/keys/key', { value: "value" }) 190 | .reply(200, '{"action":"SET","key":"/key","prevValue":"value","value":"value","index":1}') 191 | val = etcd.setSync 'key', 'value' 192 | doneCheck = checkVal done 193 | doneCheck val.err, val.body 194 | 195 | describe '#create()', -> 196 | it 'should post value to dir', (done) -> 197 | getNock() 198 | .post('/v2/keys/dir', { value: "value" }) 199 | .reply(200, '{"action":"create", "node":{"key":"/dir/2"}}') 200 | 201 | etcd.create 'dir', 'value', (err, val) -> 202 | val.should.containEql { action: "create" } 203 | done err, val 204 | 205 | describe '#post()', -> 206 | it 'should post value to key', (done) -> 207 | getNock().post('/v2/keys/key', { value: "value" }).reply(200) 208 | etcd.post 'key', 'value', done 209 | 210 | 211 | describe '#compareAndSwap()', -> 212 | it 'should set using prevValue', (done) -> 213 | getNock() 214 | .put('/v2/keys/key?prevValue=oldvalue', { value: "value"}) 215 | .reply(200, '{"action":"SET","key":"/key","prevValue":"oldvalue","value":"value","index":1}') 216 | etcd.compareAndSwap 'key', 'value', 'oldvalue', checkVal done 217 | 218 | it 'has alias testAndSet', -> 219 | etcd.testAndSet.should.equal etcd.testAndSet 220 | 221 | describe '#compareAndDelete', -> 222 | it 'should delete using prevValue', (done) -> 223 | getNock().delete('/v2/keys/key?prevValue=oldvalue').reply(200) 224 | etcd.compareAndDelete 'key', 'oldvalue', done 225 | 226 | it 'has alias testAndDelete', -> 227 | etcd.compareAndDelete.should.equal etcd.testAndDelete 228 | 229 | describe '#mkdir()', -> 230 | it 'should create directory', (done) -> 231 | getNock() 232 | .put('/v2/keys/key?dir=true') 233 | .reply(200, '{"action":"create","node":{"key":"/key","dir":true,"modifiedIndex":1,"createdIndex":1}}') 234 | etcd.mkdir 'key', (err, val) -> 235 | val.should.containEql {action: "create"} 236 | val.node.should.containEql {key: "/key"} 237 | val.node.should.containEql {dir: true} 238 | done() 239 | 240 | it 'should work when no options or callback given - bug #56', (done) -> 241 | replybody = '{"action":"create", "node":{"key":"/key","dir":true,"modifiedIndex":1,"createdIndex":1}}' 242 | getNock() 243 | .put('/v2/keys/key?dir=true') 244 | .reply(200, (uri, req, cb) -> 245 | cb(replybody) 246 | done() 247 | ) 248 | etcd.mkdir 'key' 249 | 250 | 251 | describe '#mkdirSync()', -> 252 | it 'should synchronously create directory', (done) -> 253 | getNock() 254 | .put('/v2/keys/key?dir=true') 255 | .reply(200, '{"action":"create","node":{"key":"/key","dir":true,"modifiedIndex":1,"createdIndex":1}}') 256 | val = etcd.mkdirSync 'key' 257 | val.body.should.containEql {action: "create"} 258 | val.body.node.should.containEql {key: "/key"} 259 | val.body.node.should.containEql {dir: true} 260 | done() 261 | 262 | describe '#rmdir()', -> 263 | it 'should remove directory', (done) -> 264 | getNock().delete('/v2/keys/key?dir=true').reply(200) 265 | etcd.rmdir 'key', done 266 | 267 | describe '#rmdirSync()', -> 268 | it 'should synchronously remove directory', (done) -> 269 | getNock().delete('/v2/keys/key?dir=true') 270 | .reply(200, '{"action":"delete","node":{"key":"/key","dir":true,"modifiedIndex":1,"createdIndex":3}}') 271 | val = etcd.rmdirSync 'key' 272 | val.body.should.containEql {action: "delete"} 273 | val.body.node.should.containEql {dir: true} 274 | done() 275 | 276 | describe '#del()', -> 277 | it 'should delete a given key in etcd', (done) -> 278 | getNock().delete('/v2/keys/key').reply(200) 279 | etcd.del 'key', done 280 | 281 | describe '#delSync()', -> 282 | it 'should synchronously delete a given key in etcd', (done) -> 283 | getNock().delete('/v2/keys/key2').reply(200, '{"action":"delete"}') 284 | val = etcd.delSync 'key2' 285 | val.body.should.containEql {action: "delete"} 286 | done() 287 | 288 | describe '#watch()', -> 289 | it 'should do a get with wait=true', (done) -> 290 | getNock() 291 | .get('/v2/keys/key?wait=true') 292 | .reply(200, '{"action":"set","key":"/key","value":"value","modifiedIndex":7}') 293 | etcd.watch 'key', checkVal done 294 | 295 | describe '#watchIndex()', -> 296 | it 'should do a get with wait=true and waitIndex=x', (done) -> 297 | getNock() 298 | .get('/v2/keys/key?waitIndex=1&wait=true') 299 | .reply(200, '{"action":"set","key":"/key","value":"value","modifiedIndex":7}') 300 | etcd.watchIndex 'key', 1, checkVal done 301 | 302 | describe '#raw()', -> 303 | it 'should use provided method', (done) -> 304 | getNock().patch('/key').reply(200, 'ok') 305 | etcd.raw 'PATCH', 'key', null, {}, done 306 | 307 | it 'should send provided value', (done) -> 308 | getNock().post('/key', { value: "value" }).reply(200, 'ok') 309 | etcd.raw 'POST', 'key', "value", {}, done 310 | 311 | it 'should call cb on value from etcd', (done) -> 312 | getNock().get('/key').reply(200, 'value') 313 | etcd.raw 'GET', 'key', null, {}, (err, val) -> 314 | val.should.equal 'value' 315 | done err, val 316 | 317 | describe '#machines()', -> 318 | it 'should ask etcd for connected machines', (done) -> 319 | getNock().get('/v2/keys/_etcd/machines').reply(200, '{"value":"value"}') 320 | etcd.machines checkVal done 321 | 322 | describe '#leader()', -> 323 | it 'should ask etcd for leader', (done) -> 324 | getNock().get('/v2/leader').reply(200, '{"value":"value"}') 325 | etcd.leader checkVal done 326 | 327 | describe '#leaderStats()', -> 328 | it 'should ask etcd for statistics for leader', (done) -> 329 | getNock().get('/v2/stats/leader').reply(200, '{"value":"value"}') 330 | etcd.leaderStats checkVal done 331 | 332 | describe '#selfStats()', -> 333 | it 'should ask etcd for statistics for connected server', (done) -> 334 | getNock().get('/v2/stats/self').reply(200, '{"value":"value"}') 335 | etcd.selfStats checkVal done 336 | 337 | describe '#version()', -> 338 | it 'should ask etcd for version', (done) -> 339 | getNock().get('/version').reply(200, 'etcd v0.1.0-8-gaad1626') 340 | etcd.version (err, val) -> 341 | val.should.equal 'etcd v0.1.0-8-gaad1626' 342 | done err, val 343 | 344 | 345 | describe 'SSL support', -> 346 | 347 | beforeEach () -> 348 | nock.cleanAll() 349 | 350 | it 'passes ssl options to request lib', (done) -> 351 | etcdssl = new Etcd 'https://localhost:4009', {ca: 'myca', cert: 'mycert', key: 'mykey'} 352 | simple.mock(etcdssl.client, "_doRequest").callFn (options) -> 353 | options.should.containEql 354 | ca: 'myca' 355 | cert: 'mycert' 356 | key: 'mykey' 357 | done() 358 | 359 | etcdssl.get 'key' 360 | 361 | 362 | describe 'Cancellation Token', -> 363 | 364 | beforeEach () -> 365 | nock.cleanAll() 366 | 367 | it 'should return token on request', -> 368 | getNock().get('/version').reply(200, 'etcd v0.1.0-8-gaad1626') 369 | etcd = new Etcd 370 | token = etcd.version() 371 | token.abort.should.be.a.function 372 | token.isAborted().should.be.false 373 | 374 | it 'should stop execution on abort', (done) -> 375 | http = getNock() 376 | .log(console.log) 377 | .get('/v2/keys/key') 378 | .reply(200, '{"action":"GET","key":"/key","value":"value","index":1}') 379 | etcd = new Etcd '127.0.0.1', 2379 380 | 381 | # This sucks a bit.. are there any better way of checking that a callback 382 | # does not happen? 383 | token = etcd.get "key", () -> throw new Error "Call should have been aborted" 384 | token.abort() 385 | setTimeout done, 50 386 | 387 | 388 | describe 'Multiserver/Cluster support', -> 389 | 390 | beforeEach () -> 391 | nock.cleanAll() 392 | 393 | it 'should accept list of servers in constructor', -> 394 | etcd = new Etcd ['localhost:2379', 'localhost:4002'] 395 | etcd.getHosts().should.eql ['http://localhost:2379', 'http://localhost:4002'] 396 | 397 | it 'should try next server in list on http error', (done) -> 398 | path = '/v2/keys/foo' 399 | response = '{"action":"GET","key":"/key","value":"value","index":1}' 400 | 401 | handler = (uri) -> 402 | nock.cleanAll() 403 | getNock('http://s1').get(path).reply(200, response) 404 | getNock('http://s2').get(path).reply(200, response) 405 | return {} 406 | 407 | getNock('http://s1').get(path).reply(500, handler) 408 | getNock('http://s2').get(path).reply(500, handler) 409 | 410 | etcd = new Etcd ['s1', 's2'] 411 | etcd.get 'foo', (err, res) -> 412 | res.value.should.eql 'value' 413 | done() 414 | 415 | 416 | it 'should callback error if all servers failed', (done) -> 417 | path = '/v2/keys/foo' 418 | getNock('http://s1').get(path).reply(500, {}) 419 | getNock('http://s2').get(path).reply(500, {}) 420 | 421 | etcd = new Etcd ['s1', 's2'] 422 | etcd.get 'foo', (err, res) -> 423 | err.should.be.an.instanceOf Error 424 | err.errors.should.have.lengthOf 2 425 | done() 426 | 427 | 428 | describe 'when cluster is doing leader elect', () -> 429 | 430 | it 'should retry on connection refused', (done) -> 431 | etcd = new Etcd ("localhost:#{p}" for p in [47187, 47188, 47189]) 432 | token = etcd.set 'a', 'b', (err) -> 433 | err.errors.length.should.be.exactly 12 434 | token.errors.length.should.be.exactly 12 435 | token.retries.should.be.exactly 3 436 | done() 437 | 438 | it 'should allow maxRetries to control number of retries', (done) -> 439 | etcd = new Etcd ("localhost:#{p}" for p in [47187, 47188, 47189]) 440 | token = etcd.set 'a', 'b', { maxRetries: 1 }, (err) -> 441 | err.errors.length.should.be.exactly 6 442 | token.retries.should.be.exactly 1 443 | done() 444 | -------------------------------------------------------------------------------- /test/watcher.coffee: -------------------------------------------------------------------------------- 1 | should = require 'should' 2 | nock = require 'nock' 3 | 4 | Etcd = require '../src/index' 5 | Watcher = require '../src/watcher.coffee' 6 | 7 | class FakeEtcd 8 | constructor: -> 9 | @stopped = false 10 | @cb = -> 11 | 12 | abort: -> {abort: => @stopped = true} 13 | 14 | watch: (key, options, cb) -> 15 | key.should.equal 'key' 16 | @cb = cb 17 | return @abort() 18 | 19 | watchIndex: (key, index, options, cb) -> 20 | key.should.equal 'key' 21 | @cb = cb 22 | return @abort() 23 | 24 | change: (err, val, header = {}) -> 25 | @cb err, val, header 26 | 27 | 28 | describe 'Watcher', -> 29 | it 'should emit change on watch change', (done) -> 30 | etcd = new FakeEtcd 31 | w = new Watcher etcd, 'key' 32 | 33 | w.on 'change', (val) -> 34 | val.should.containEql { node: { modifiedIndex: 0 } } 35 | done() 36 | 37 | etcd.change null, { node: { modifiedIndex: 0 } } 38 | 39 | it 'should emit reconnect event on error', (done) -> 40 | etcd = new FakeEtcd 41 | w = new Watcher etcd, 'key' 42 | 43 | w.on 'reconnect', (err) -> 44 | err.should.containEql { error: "error" } 45 | done() 46 | 47 | etcd.change "error", null 48 | 49 | it 'should emit error if received content is invalid', (done) -> 50 | etcd = new FakeEtcd 51 | w = new Watcher etcd, 'key' 52 | w.on 'error', -> done() 53 | 54 | etcd.change null, 'invalid content', {} 55 | 56 | it 'should emit error object on error', (done) -> 57 | etcd = new FakeEtcd 58 | w = new Watcher etcd, 'key' 59 | w.on 'error', (err) -> 60 | err.should.be.an.instanceOf Error 61 | done() 62 | 63 | etcd.change null, 'invalid content', {} 64 | 65 | it 'should use provided options', (done) -> 66 | etcd = new FakeEtcd 67 | 68 | etcd.watch = (key, opt, cb) -> 69 | opt.should.containEql { recursive: true } 70 | done() 71 | 72 | w = new Watcher etcd, 'key', null, { recursive: true } 73 | 74 | it 'should emit action on event', (done) -> 75 | etcd = new FakeEtcd 76 | w = new Watcher etcd, 'key' 77 | w.on 'set', (res) -> done() 78 | 79 | etcd.change null, { action: 'set', node: { key: '/key', value: 'value', modifiedIndex: 1, createdIndex: 1 } } 80 | 81 | it 'should reconnect (call watch again) on error', (done) -> 82 | etcd = new FakeEtcd 83 | w = new Watcher etcd, 'key' 84 | 85 | etcd.watch = (key, cb) -> 86 | w.retryAttempts.should.equal 1 87 | done() 88 | 89 | etcd.change "error", null 90 | 91 | it 'should reconnect (watch again) on empty body (etcd timeout)', (done) -> 92 | etcd = new FakeEtcd 93 | w = new Watcher etcd, 'key' 94 | 95 | w.on 'reconnect', () -> 96 | done() 97 | 98 | etcd.change null, null, {'x-etcd-index': 123} 99 | 100 | it 'should call watch on next index after getting change', (done) -> 101 | etcd = new FakeEtcd 102 | w = new Watcher etcd, 'key' 103 | 104 | i = 5 105 | 106 | etcd.watchIndex = (key, index, cb) -> 107 | index.should.equal i + 1 108 | done() 109 | 110 | etcd.change null, { node: { modifiedIndex: i } } 111 | 112 | it 'should abort request when stop is called', -> 113 | etcd = new FakeEtcd 114 | w = new Watcher etcd, 'key' 115 | 116 | w.stop() 117 | etcd.stopped.should.be.true 118 | 119 | it 'should emit stop when stopped', (done) -> 120 | etcd = new FakeEtcd 121 | w = new Watcher etcd, 'key' 122 | 123 | w.on 'stop', -> done() 124 | w.stop() 125 | 126 | 127 | describe 'Watcher resync', -> 128 | 129 | getNock = -> 130 | nock 'http://127.0.0.1:2379' 131 | 132 | it 'should resync if index is outdated and cleared', (done) -> 133 | getNock() 134 | .get('/v2/keys/key?waitIndex=0&wait=true') 135 | .reply(401, { 136 | errorCode: 401 137 | message: "The event in requested index is outdated and cleared" 138 | cause: "the requested history has been cleared [1007/4]" 139 | index: 2006 140 | }) 141 | .get('/v2/keys/key?waitIndex=2006&wait=true') 142 | .reply(200, { 143 | action:"set" 144 | node: 145 | key: "/key" 146 | value: "banan" 147 | modifiedIndex: 2013 148 | createdIndex: 2013 149 | prevNode: 150 | key: "/key" 151 | value: "2" 152 | modifiedIndex: 5 153 | createdIndex: 5 154 | }) 155 | .get('/v2/keys/key?waitIndex=2014&wait=true').reply(200,{}) 156 | 157 | w = new Watcher (new Etcd), 'key', 0 158 | w.on 'change', (res) -> 159 | res.node.value.should.equal 'banan' 160 | w.stop() 161 | done() 162 | --------------------------------------------------------------------------------