b69832c227
Reviewed by: Josh Wilsdon <josh@wilsdon.ca> Approved by: Josh Wilsdon <josh@wilsdon.ca>
169 lines
5.2 KiB
JavaScript
169 lines
5.2 KiB
JavaScript
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/*
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* Copyright 2017 Joyent, Inc.
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*
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* `triton instance ssh ...`
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*/
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var path = require('path');
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var spawn = require('child_process').spawn;
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var vasync = require('vasync');
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var common = require('../common');
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var errors = require('../errors');
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function do_ssh(subcmd, opts, args, callback) {
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if (opts.help) {
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this.do_help('help', {}, [subcmd], callback);
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return;
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} else if (args.length === 0) {
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callback(new errors.UsageError('missing INST arg'));
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return;
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}
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var id = args.shift();
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var user;
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var i = id.indexOf('@');
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if (i >= 0) {
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user = id.substr(0, i);
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id = id.substr(i + 1);
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}
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vasync.pipeline({arg: {cli: this.top}, funcs: [
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common.cliSetupTritonApi,
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function getInstanceIp(ctx, next) {
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ctx.cli.tritonapi.getInstance(id, function (err, inst) {
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if (err) {
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next(err);
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return;
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}
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ctx.inst = inst;
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ctx.ip = inst.primaryIp;
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if (!ctx.ip) {
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next(new Error('primaryIp not found for instance'));
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return;
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}
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next();
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});
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},
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function getUser(ctx, next) {
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if (user) {
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next();
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return;
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}
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ctx.cli.tritonapi.getImage({
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name: ctx.inst.image,
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useCache: true
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}, function (getImageErr, image) {
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if (getImageErr) {
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next(getImageErr);
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return;
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}
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/*
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* This is a convention as seen on Joyent's
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* "ubuntu-certified" KVM images.
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*/
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if (image.tags && image.tags.default_user) {
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user = image.tags.default_user;
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} else {
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user = 'root';
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}
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next();
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});
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},
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function doSsh(ctx, next) {
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args = ['-l', user, ctx.ip].concat(args);
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/*
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* By default we disable ControlMaster (aka mux, aka SSH
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* connection multiplexing) because of
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* https://github.com/joyent/node-triton/issues/52
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*/
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if (!opts.no_disable_mux) {
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/*
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* A simple `-o ControlMaster=no` doesn't work. With
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* just that option, a `ControlPath` option (from
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* ~/.ssh/config) will still be used if it exists. Our
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* hack is to set a ControlPath we know should not
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* exist. Using '/dev/null' wasn't a good alternative
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* because `ssh` tries "$ControlPath.$somerandomnum"
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* and also because Windows.
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*/
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var nullSshControlPath = path.resolve(
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ctx.cli.tritonapi.config._configDir, 'tmp',
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'nullSshControlPath');
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args = [
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'-o', 'ControlMaster=no',
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'-o', 'ControlPath='+nullSshControlPath
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].concat(args);
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}
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ctx.cli.log.info({args: args}, 'forking ssh');
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var child = spawn('ssh', args, {stdio: 'inherit'});
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child.on('close', function (code) {
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/*
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* Once node 0.10 support is dropped we could instead:
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* process.exitCode = code;
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* callback();
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*/
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process.exit(code);
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/* process.exit does not return so no need to call next(). */
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});
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}
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]}, callback);
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}
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do_ssh.options = [
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{
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names: ['help', 'h'],
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type: 'bool',
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help: 'Show this help.'
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}
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];
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do_ssh.synopses = ['{{name}} ssh [-h] [USER@]INST [SSH-ARGUMENTS]'];
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do_ssh.help = [
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/* BEGIN JSSTYLED */
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'SSH to the primary IP of an instance',
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'',
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'{{usage}}',
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'',
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'{{options}}',
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'Where INST is the name, id, or short id of an instance. Note that',
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'the INST argument must come before any `ssh` options or arguments.',
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'Where USER is the username to use on the instance. If not specified,',
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'the instance\'s image is inspected for the default_user tag.',
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'If USER is not specified and the default_user tag is not set, the user',
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'is assumed to be \"root\".',
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'',
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'There is a known issue with SSH connection multiplexing (a.k.a. ',
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'ControlMaster, mux) where stdout/stderr is lost. As a workaround, `ssh`',
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'is spawned with options disabling ControlMaster. See ',
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'<https://github.com/joyent/node-triton/issues/52> for details. If you ',
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'want to use ControlMaster, an alternative is:',
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' ssh root@$(triton ip INST)'
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/* END JSSTYLED */
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].join('\n');
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do_ssh.interspersedOptions = false;
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// Use 'file' to fallback to the default bash completion... even though 'file'
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// isn't quite right.
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do_ssh.completionArgtypes = ['tritoninstance', 'file'];
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module.exports = do_ssh;
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