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node-spearhead/lib/tritonapi.js

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2014-02-07 23:21:24 +02:00
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/*
* Copyright 2015 Joyent, Inc.
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*
* Core TritonApi 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 mkdirp = require('mkdirp');
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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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// We are cheating here. restify-clients should export its 'bunyan'.
var restifyBunyanSerializers =
require('restify-clients/lib/helpers/bunyan').serializers;
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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;
//---- TritonApi class
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/**
* Create a TritonApi client.
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*
* @param opts {Object}
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* - log {Bunyan Logger}
* ...
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*/
function TritonApi(opts) {
assert.object(opts, 'opts');
assert.object(opts.log, 'opts.log');
assert.object(opts.profile, 'opts.profile');
assert.object(opts.config, 'opts.config');
this.profile = opts.profile;
this.config = opts.config;
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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 (opts.log.serializers &&
(!opts.log.serializers.client_req ||
!opts.log.serializers.client_req)) {
this.log = opts.log.child({
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serializers: restifyBunyanSerializers
});
} else {
this.log = opts.log;
}
if (this.config.cacheDir) {
this.cacheDir = path.resolve(this.config._configDir,
this.config.cacheDir,
common.slug(this.profile));
this.log.trace({cacheDir: this.cacheDir}, 'cache dir');
// TODO perhaps move this to an async .init()
if (!fs.existsSync(this.cacheDir)) {
try {
mkdirp.sync(this.cacheDir);
} catch (e) {
throw e;
}
}
}
this.cloudapi = this._cloudapiFromProfile(this.profile);
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}
TritonApi.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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};
TritonApi.prototype._cachePutJson = function _cachePutJson(key, obj, cb) {
var self = this;
assert.string(this.cacheDir, 'this.cacheDir');
assert.string(key, 'key');
assert.object(obj, 'obj');
assert.func(cb, 'cb');
var keyPath = path.resolve(this.cacheDir, key);
var data = JSON.stringify(obj);
fs.writeFile(keyPath, data, {encoding: 'utf8'}, function (err) {
if (err) {
self.log.info({err: err, keyPath: keyPath}, 'error caching');
}
cb();
});
};
TritonApi.prototype._cacheGetJson = function _cacheGetJson(key, cb) {
var self = this;
assert.string(this.cacheDir, 'this.cacheDir');
assert.string(key, 'key');
assert.func(cb, 'cb');
var keyPath = path.resolve(this.cacheDir, key);
fs.readFile(keyPath, 'utf8', function (err, data) {
if (err && err.code === 'ENOENT') {
self.log.trace({keyPath: keyPath},
'cache file does not exist');
return cb();
} else if (err) {
self.log.warn({err: err, keyPath: keyPath},
'error reading cache file');
return cb();
}
var obj;
try {
obj = JSON.parse(data);
} catch (dataErr) {
self.log.trace({err: dataErr, keyPath: keyPath},
'error parsing JSON cache file, removing');
fs.unlink(keyPath, function (err2) {
if (err2) {
self.log.warn({err: err2},
'failed to remove JSON cache file');
}
cb(err2);
});
return;
}
cb(null, obj);
});
};
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/**
* CloudAPI listImages wrapper with optional caching.
*
* @param opts {Object} Optional.
* - useCase {Boolean} Whether to use Triton's local cache.
* - ... all other cloudapi ListImages options
* @param {Function} callback `function (err, imgs)`
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*/
TritonApi.prototype.listImages = function listImages(opts, cb) {
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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 listOpts = common.objCopy(opts);
delete listOpts.useCache;
var cacheKey = 'images.json';
var cached;
var fetched;
var res;
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vasync.pipeline({funcs: [
function tryCache(_, next) {
if (!opts.useCache) {
return next();
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}
self._cacheGetJson(cacheKey, function (err, cached_) {
if (err) {
return next(err);
}
cached = cached_;
next();
});
},
function listImgs(_, next) {
if (cached) {
return next();
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}
self.cloudapi.listImages(listOpts, function (err, imgs, res_) {
if (err) {
return next(err);
}
fetched = imgs;
res = res_;
next();
});
},
function cacheFetched(_, next) {
if (!fetched) {
return next();
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}
self._cachePutJson(cacheKey, fetched, next);
}
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]}, function (err) {
if (err) {
cb(err, null, res);
} else {
cb(null, fetched || cached, res);
}
});
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};
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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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*/
TritonApi.prototype.getImage = function getImage(name, cb) {
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assert.string(name, 'name');
assert.func(cb, 'cb');
if (common.isUUID(name)) {
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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 {
var s = name.split('@');
name = s[0];
var version = s[1];
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var opts = {};
if (version) {
opts.name = name;
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opts.version = version;
}
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this.cloudapi.listImages(opts, function (err, imgs) {
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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 (common.uuidToShortId(img.id) === 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 short id "%s" was found', name)));
} else {
cb(new Error(format('no image with name "%s" was found '
+ 'and "%s" is an ambiguous short id', 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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*/
TritonApi.prototype.getPackage = function getPackage(name, cb) {
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assert.string(name, 'name');
assert.func(cb, 'cb');
if (common.isUUID(name)) {
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this.cloudapi.getPackage({id: name}, function (err, pkg) {
if (err) {
cb(err);
} else if (!pkg.active) {
cb(new Error(format('package %s is not active', name)));
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} 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 short id "%s" was found', name)));
} else {
cb(new Error(format('no package with name "%s" was found '
+ 'and "%s" is an ambiguous short id', name)));
}
});
}
};
/**
* Get an network by ID, exact name, or short ID, in that order.
*
* If the name is ambiguous, then this errors out.
*/
TritonApi.prototype.getNetwork = function getNetwork(name, cb) {
assert.string(name, 'name');
assert.func(cb, 'cb');
if (common.isUUID(name)) {
this.cloudapi.getNetwork(name, function (err, net) {
if (err) {
cb(err);
} else {
cb(null, net);
}
});
} else {
this.cloudapi.listNetworks(function (err, nets) {
if (err) {
return cb(err);
}
var nameMatches = [];
var shortIdMatches = [];
for (var i = 0; i < nets.length; i++) {
var net = nets[i];
if (net.name === name) {
nameMatches.push(net);
}
if (net.id.slice(0, 8) === name) {
shortIdMatches.push(net);
}
}
if (nameMatches.length === 1) {
cb(null, nameMatches[0]);
} else if (nameMatches.length > 1) {
cb(new Error(format(
'network name "%s" is ambiguous: matches %d networks',
name, nameMatches.length)));
} else if (shortIdMatches.length === 1) {
cb(null, shortIdMatches[0]);
} else if (shortIdMatches.length === 0) {
cb(new Error(format(
'no network with name or short id "%s" was found', name)));
} else {
cb(new Error(format('no network with name "%s" was found '
+ 'and "%s" is an ambiguous short id', 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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*/
TritonApi.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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}
self.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 candidate;
while ((candidate = s.read()) !== null) {
if (candidate.id.slice(0, shortId.length) === shortId) {
if (match) {
return nextOnce(new Error(
'instance short id "%s" is ambiguous',
shortId));
} else {
match = candidate;
}
}
}
});
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 short id "%s" was found', name)));
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}
});
};
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//---- exports
module.exports = TritonApi;