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node-spearhead/lib/triton.js

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/*
* Copyright (c) 2015, Joyent, Inc. All rights reserved.
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*
* Core Triton client driver class.
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*/
var p = console.log;
var assert = require('assert-plus');
var auth = require('smartdc-auth');
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var EventEmitter = require('events').EventEmitter;
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var fs = require('fs');
var format = require('util').format;
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var once = require('once');
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var path = require('path');
var restifyClients = require('restify-clients');
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var tabula = require('tabula');
var vasync = require('vasync');
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var cloudapi = require('./cloudapi2');
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var common = require('./common');
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var errors = require('./errors');
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var loadConfigSync = require('./config').loadConfigSync;
//---- Triton class
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/**
* Create a Triton client.
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*
* @param options {Object}
* - log {Bunyan Logger}
* - profileName {String} Optional. Name of profile to use. Defaults to
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* 'defaultProfile' in the config.
* - envProfile {Object} Optional. A starter 'env' profile object. Missing
* fields will be filled in from standard SDC_* envvars.
* ...
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*/
function Triton(options) {
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assert.object(options, 'options');
assert.object(options.log, 'options.log');
assert.optionalString(options.profileName, 'options.profileName');
assert.optionalString(options.configPath, 'options.configPath');
assert.optionalString(options.cacheDir, 'options.cacheDir');
assert.optionalObject(options.envProfile, 'options.envProfile');
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// Make sure a given bunyan logger has reasonable client_re[qs] serializers.
// Note: This was fixed in restify, then broken again in
// https://github.com/mcavage/node-restify/pull/501
if (options.log.serializers &&
(!options.log.serializers.client_req ||
!options.log.serializers.client_req)) {
this.log = options.log.child({
// XXX cheating. restify-clients should export its 'bunyan'.
serializers: require('restify-clients/lib/helpers/bunyan').serializers
});
} else {
this.log = options.log;
}
this.config = loadConfigSync({
configPath: options.configPath,
envProfile: options.envProfile
});
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this.profiles = this.config.profiles;
this.profile = this.getProfile(
options.profileName || this.config.defaultProfile);
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this.log.trace({profile: this.profile}, 'profile data');
this.cacheDir = options.cacheDir;
this.cloudapi = this._cloudapiFromProfile(this.profile);
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}
Triton.prototype.getProfile = function getProfile(name) {
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for (var i = 0; i < this.profiles.length; i++) {
if (this.profiles[i].name === name) {
return this.profiles[i];
}
}
};
Triton.prototype._cloudapiFromProfile = function _cloudapiFromProfile(profile) {
assert.object(profile, 'profile');
assert.string(profile.account, 'profile.account');
assert.string(profile.keyId, 'profile.keyId');
assert.string(profile.url, 'profile.url');
assert.optionalString(profile.privKey, 'profile.privKey');
assert.optionalBool(profile.insecure, 'profile.insecure');
var rejectUnauthorized = (profile.insecure === undefined
? true : !profile.insecure);
var sign;
if (profile.privKey) {
sign = auth.privateKeySigner({
user: profile.account,
keyId: profile.keyId,
key: profile.privKey
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});
} else {
sign = auth.cliSigner({
keyId: profile.keyId,
user: profile.account
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});
}
var client = cloudapi.createClient({
url: profile.url,
user: profile.account,
version: '*',
rejectUnauthorized: rejectUnauthorized,
sign: sign,
log: this.log
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});
return client;
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};
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/**
* cloudapi listImages wrapper with optional caching
*/
Triton.prototype.listImages = function listImages(opts, cb) {
var self = this;
if (cb === undefined) {
cb = opts;
opts = {};
}
assert.object(opts, 'opts');
assert.optionalBool(opts.useCache, 'opts.useCache');
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assert.func(cb, 'cb');
var cacheFile;
if (self.cacheDir)
cacheFile = path.join(self.cacheDir, 'images.json');
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if (opts.useCache && !cacheFile) {
cb(new Error('opts.useCache set but no cacheDir found'));
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return;
}
// try to read the cache if the user wants it
// if this fails for any reason we fallback to hitting the cloudapi
if (opts.useCache) {
fs.readFile(cacheFile, 'utf8', function (err, out) {
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if (err) {
self.log.info({err: err}, 'failed to read cache file %s', cacheFile);
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fetch();
return;
}
var data;
try {
data = JSON.parse(out);
} catch (e) {
self.log.info({err: e}, 'failed to parse cache file %s', cacheFile);
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fetch();
return;
}
cb(null, data, {});
});
return;
}
fetch();
function fetch() {
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self.cloudapi.listImages(opts, function (err, imgs, res) {
if (!err && self.cacheDir) {
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// cache the results
var data = JSON.stringify(imgs);
fs.writeFile(cacheFile, data, {encoding: 'utf8'}, function (err) {
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if (err)
self.log.info({err: err}, 'error caching images results');
done();
});
} else {
done();
}
function done() {
cb(err, imgs, res);
}
});
}
};
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/**
* Get an image by ID, exact name, or short ID, in that order.
*
* If there is more than one image with that name, then the latest
* (by published_at) is returned.
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*/
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Triton.prototype.getImage = function getImage(name, cb) {
assert.string(name, 'name');
assert.func(cb, 'cb');
if (common.UUID_RE.test(name)) {
this.cloudapi.getImage({id: name}, function (err, img) {
if (err) {
cb(err);
} else if (img.state !== 'active') {
cb(new Error(format('image %s is not active', name)));
} else {
cb(null, img);
}
});
} else {
this.cloudapi.listImages(function (err, imgs) {
if (err) {
return cb(err);
}
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var nameMatches = [];
var shortIdMatches = [];
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for (var i = 0; i < imgs.length; i++) {
var img = imgs[i];
if (img.name === name) {
nameMatches.push(img);
}
if (img.id.slice(0, 8) === name) {
shortIdMatches.push(img);
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}
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}
if (nameMatches.length === 1) {
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cb(null, nameMatches[0]);
} else if (nameMatches.length > 1) {
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tabula.sortArrayOfObjects(nameMatches, 'published_at');
cb(null, nameMatches[nameMatches.length - 1]);
} else if (shortIdMatches.length === 1) {
cb(null, shortIdMatches[0]);
} else if (shortIdMatches.length === 0) {
cb(new Error(format(
'no image with name or shortId "%s" was found', name)));
} else {
cb(new Error(format('no image with name "%s" was found '
+ 'and "%s" is an ambiguous shortId', name)));
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}
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});
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}
};
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/**
* Get an active package by ID, exact name, or short ID, in that order.
*
* If there is more than one package with that name, then this errors out.
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*/
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Triton.prototype.getPackage = function getPackage(name, cb) {
assert.string(name, 'name');
assert.func(cb, 'cb');
if (common.UUID_RE.test(name)) {
this.cloudapi.getPackage({id: name}, function (err, pkg) {
if (err) {
cb(err);
} else if (!pkg.active) {
cb(new Error(format('image %s is not active', name)));
} else {
cb(null, pkg);
}
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});
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} else {
this.cloudapi.listPackages(function (err, pkgs) {
if (err) {
return cb(err);
}
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var nameMatches = [];
var shortIdMatches = [];
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for (var i = 0; i < pkgs.length; i++) {
var pkg = pkgs[i];
if (pkg.name === name) {
nameMatches.push(pkg);
}
if (pkg.id.slice(0, 8) === name) {
shortIdMatches.push(pkg);
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}
}
if (nameMatches.length === 1) {
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cb(null, nameMatches[0]);
} else if (nameMatches.length > 1) {
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cb(new Error(format(
'package name "%s" is ambiguous: matches %d packages',
name, nameMatches.length)));
} else if (shortIdMatches.length === 1) {
cb(null, shortIdMatches[0]);
} else if (shortIdMatches.length === 0) {
cb(new Error(format(
'no package with name or shortId "%s" was found', name)));
} else {
cb(new Error(format('no package with name "%s" was found '
+ 'and "%s" is an ambiguous shortId', name)));
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}
});
}
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};
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/**
* Get an instance by ID, exact name, or short ID, in that order.
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*
* @param {String} name
* @param {Function} callback `function (err, inst)`
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*/
Triton.prototype.getInstance = function getInstance(name, cb) {
var self = this;
assert.string(name, 'name');
assert.func(cb, 'cb');
var shortId;
var inst;
vasync.pipeline({funcs: [
function tryUuid(_, next) {
var uuid;
if (common.isUUID(name)) {
uuid = name;
} else {
shortId = common.normShortId(name);
if (shortId && common.isUUID(shortId)) {
// E.g. a >32-char docker container ID normalized to a UUID.
uuid = shortId;
} else {
return next();
}
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}
this.cloudapi.getMachine(uuid, function (err, inst) {
inst = inst;
next(err);
});
},
function tryName(_, next) {
if (inst) {
return next();
}
self.cloudapi.listMachines({name: name}, function (err, insts) {
if (err) {
return next(err);
}
for (var i = 0; i < insts.length; i++) {
if (insts[i].name === name) {
inst = insts[i];
// Relying on rule that instance name is unique
// for a user and DC.
return next();
}
}
next();
});
},
function tryShortId(_, next) {
if (inst || !shortId) {
return next();
}
var nextOnce = once(next);
var match;
var s = self.cloudapi.createListMachinesStream();
s.on('error', function (err) {
nextOnce(err);
});
s.on('readable', function () {
var inst;
while ((inst = s.read()) !== null) {
if (inst.id.slice(0, shortId.length) === shortId) {
if (match) {
return nextOnce(new Error(
'instance short id "%s" is ambiguous',
shortId));
} else {
match = inst;
}
}
}
});
s.on('end', function () {
if (match) {
inst = match;
}
nextOnce();
});
}
]}, function (err) {
if (err) {
cb(err);
} else if (inst) {
cb(null, inst);
} else {
cb(new Error(format(
'no instance with name or shortId "%s" was found', name)));
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}
});
};
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//---- exports
module.exports = Triton;