[PATCH conductor 2/2] Instance ssh key

From: Jan Provaznik <jprovazn(a)redhat.com&gt; When instance is started unique ssh key is generated and uploaded to instance. New instance key is not generated with deltacloud api because api returns only private part of key but with openssl lib. This patch requires net_scp and delayed_job gems and delayedjob worker should be started with: 'rake jobs:work' command --- src/Rakefile | 7 ++++ src/app/models/cloud_account_observer.rb | 2 +- src/app/models/instance.rb | 17 ++++++++++ src/app/models/instance_key.rb | 34 ++++++++++++++++++++ src/app/models/instance_observer.rb | 11 +++--- src/config/environment.rb | 2 + src/config/initializers/delayed_job.rb | 2 + .../migrate/20110124103216_create_delayed_jobs.rb | 21 ++++++++++++ src/dbomatic/dbomatic | 5 ++- src/spec/models/instance_observer_spec.rb | 10 +++--- 10 files changed, 99 insertions(+), 12 deletions(-) create mode 100644 src/config/initializers/delayed_job.rb create mode 100644 src/db/migrate/20110124103216_create_delayed_jobs.rb diff --git a/src/Rakefile b/src/Rakefile index f2d8d21..ad7f788 100644 --- a/src/Rakefile +++ b/src/Rakefile @@ -12,4 +12,11 @@ begin rescue LoadError end +begin + #gem 'delayed_job', :version => '~>2.0.4' + require 'delayed/tasks' +rescue LoadError + STDERR.puts "Run `rake gems:install` to install delayed_job" +end + require 'tasks/rails' diff --git a/src/app/models/cloud_account_observer.rb b/src/app/models/cloud_account_observer.rb index a0826ea..f342897 100644 --- a/src/app/models/cloud_account_observer.rb +++ b/src/app/models/cloud_account_observer.rb @@ -1,7 +1,7 @@ class CloudAccountObserver < ActiveRecord::Observer def after_create(account) if key = account.generate_auth_key - account.update_attribute(:instance_key, InstanceKey.create!(:pem => key.pem, :name => key.id, :instance_key_owner => account)) + account.update_attribute(:instance_key, InstanceKey.create!(:pem => key.pem.first, :name => key.id, :instance_key_owner => account)) end end end diff --git a/src/app/models/instance.rb b/src/app/models/instance.rb index 3ae921d..1172998 100644 --- a/src/app/models/instance.rb +++ b/src/app/models/instance.rb @@ -170,6 +170,23 @@ class Instance < ActiveRecord::Base end end + def create_unique_key + client = self.cloud_account.connect + # TODO: what if dcloud driver is not running + return unless client && client.feature?(:instances, :authentication_key) + # deltacloud/ec2 api's create_key method returns only private part of + # key -> we don't know public part, so we generate new ssh key + # and replace whole authorized_keys file + begin + self.instance_key.replace_key(self.public_addresses) + self.events.create!(:summary => "successfully updated ssh key", :event_time => Time.now) + rescue + msg = "failed to upload ssh key: #{$!}" + self.last_error = msg + self.events.create!(:summary => msg, :event_time => Time.now) + end + end + def self.get_user_instances_stats(user) stats = { :running_instances => 0, diff --git a/src/app/models/instance_key.rb b/src/app/models/instance_key.rb index 9c941fe..3ec3e51 100644 --- a/src/app/models/instance_key.rb +++ b/src/app/models/instance_key.rb @@ -19,8 +19,42 @@ # Filters added to this controller apply to all controllers in the application. # Likewise, all the methods added will be available for all controllers. # + +require 'openssl' +require 'base64' + class InstanceKey < ActiveRecord::Base belongs_to :instance_key_owner, :polymorphic => true + REMOTE_USER = 'ec2-user' + REMOTE_HOME = '/home/ec2-user' + + def replace_key(addr) + transaction do + key = generate_ssh_key + replace_on_server(addr, key[:public]) + self.pem = key[:private] + save! + end + end + + private + + def replace_on_server(addr, new_pub) + Net::SCP::start(addr, REMOTE_USER, :key_data => [self.pem], :keys => []) do |scp| + scp.upload! StringIO.new(new_pub), File.join(REMOTE_HOME, '/.ssh/authorized_keys') + end + end + + def generate_ssh_key + key = OpenSSL::PKey::RSA.generate(1024) + writer = Net::SSH::Buffer.new + writer.write_key key + ssh_key = Base64.encode64( writer.to_s ).strip.gsub( /[\n\r\t ]/, "" ) + { + :private => key.export, + :public => "#{key.ssh_type} #{ssh_key} #{ENV['USER']}@#{ENV['HOSTNAME']}" + } + end end diff --git a/src/app/models/instance_observer.rb b/src/app/models/instance_observer.rb index 80b39c5..867017f 100644 --- a/src/app/models/instance_observer.rb +++ b/src/app/models/instance_observer.rb @@ -61,12 +61,13 @@ class InstanceObserver < ActiveRecord::Observer end end - def before_update(instance) + def after_update(instance) # we try to generate key only when instance is running - # and instance_key is not generated yet - return if instance.state != Instance::STATE_RUNNING or instance.instance_key - if key = instance.cloud_account.generate_auth_key - instance.instance_key = InstanceKey.create!(:pem => key.pem, :name => key.id, :instance_key_owner => instance) + # and instance_key is same is cloud account key (same names - in dbomatic we + # copy cloud account key to instance key) + if instance.state_changed? and instance.state == Instance::STATE_RUNNING and + instance.instance_key and instance.instance_key.name == instance.cloud_account.instance_key.name + instance.delay.create_unique_key end end diff --git a/src/config/environment.rb b/src/config/environment.rb index a897feb..1f49f25 100644 --- a/src/config/environment.rb +++ b/src/config/environment.rb @@ -54,6 +54,8 @@ Rails::Initializer.run do |config| config.gem "rb-inotify" config.gem 'rack-restful_submit', :version => '1.1.2' config.gem 'sunspot_rails', :lib => 'sunspot/rails' + config.gem 'delayed_job', :version => '~>2.0.4' + config.gem 'net-scp', :lib => 'net/scp' config.middleware.swap Rack::MethodOverride, 'Rack::RestfulSubmit' diff --git a/src/config/initializers/delayed_job.rb b/src/config/initializers/delayed_job.rb new file mode 100644 index 0000000..a8684b4 --- /dev/null +++ b/src/config/initializers/delayed_job.rb @@ -0,0 +1,2 @@ +Delayed::Worker.backend = :active_record +Delayed::Worker.max_attempts = 1 diff --git a/src/db/migrate/20110124103216_create_delayed_jobs.rb b/src/db/migrate/20110124103216_create_delayed_jobs.rb new file mode 100644 index 0000000..943ff9b --- /dev/null +++ b/src/db/migrate/20110124103216_create_delayed_jobs.rb @@ -0,0 +1,21 @@ +class CreateDelayedJobs < ActiveRecord::Migration + def self.up + create_table :delayed_jobs, :force => true do |table| + table.integer :priority, :default => 0 # Allows some jobs to jump to the front of the queue + table.integer :attempts, :default => 0 # Provides for retries, but still fail eventually. + table.text :handler # YAML-encoded string of the object that will do work + table.text :last_error # reason for last failure (See Note below) + table.datetime :run_at # When to run. Could be Time.zone.now for immediately, or sometime in the future. + table.datetime :locked_at # Set when a client is working on this object + table.datetime :failed_at # Set when all retries have failed (actually, by default, the record is deleted instead) + table.string :locked_by # Who is working on this object (if locked) + table.timestamps + end + + add_index :delayed_jobs, [:priority, :run_at], :name => 'delayed_jobs_priority' + end + + def self.down + drop_table :delayed_jobs + end +end diff --git a/src/dbomatic/dbomatic b/src/dbomatic/dbomatic index bf3a987..e021ff6 100755 --- a/src/dbomatic/dbomatic +++ b/src/dbomatic/dbomatic @@ -212,7 +212,10 @@ class CondorEventLog < Nokogiri::XML::SAX::Document # FIXME: we are updating the instance_key_id here, but this is really not # the right way or place to do this. This will have to be revisited when # we come up with a real key management architecture - inst.instance_key_id = cloud_account.instance_key.id + new_key = InstanceKey.new(cloud_account.instance_key.attributes) + new_key.instance_key_owner = inst + new_key.save! + inst.instance_key = new_key inst.save! end diff --git a/src/spec/models/instance_observer_spec.rb b/src/spec/models/instance_observer_spec.rb index be2665e..d237786 100644 --- a/src/spec/models/instance_observer_spec.rb +++ b/src/spec/models/instance_observer_spec.rb @@ -156,16 +156,16 @@ describe InstanceObserver do it "should generate instance key when instance is running" do client = mock('DeltaCloud', :null_object => true) - key = mock('Key', :null_object => true) - key.stub!(:pem).and_return("PEM") - key.stub!(:id).and_return("1_user") client.stub!(:"feature?").and_return(true) - client.stub!(:"create_key").and_return(key) @cloud_account.stub!(:connect).and_return(client) @instance.stub!(:cloud_account).and_return(@cloud_account) + @instance.instance_key = Factory(:instance_key, :name => 'key1', :instance_key_owner => @instance) + @instance.instance_key.stub!(:replace_on_server).and_return(true) + @cloud_account.instance_key = Factory(:instance_key, :name => 'key1', :instance_key_owner => @cloud_account) + @instance.state = Instance::STATE_RUNNING @instance.save! - @instance.instance_key.should_not == nil + @instance.instance_key.name.should != @cloud_account.instance_key.name end end -- 1.7.3.5