厨师:延迟服务通知

Question

这是我的mongodb食谱：

node.default['mongodb3']['version'] = '3.4.2'
node.default['mongodb3']['repo'] = 'https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/'
node.default['mongodb3']['config']['mongod']['net']['port'] = 30158
node.default['mongodb3']['config']['mongod']['net']['bindIp'] = 'localhost'
node.default['mongodb3']['config']['mongod']['security']['authorization'] = 'enabled'
include_recipe 'mongodb3::default'
cookbook_file "/tmp/setupUsers.js" do
  source "mongo/setupUsers.js"
  mode 0755
end
execute "Add Mongo Users" do
  command "mongo localhost:30158 /tmp/setupUsers.js"
end

您可以看到：

1. 我正在安装mongo 3.4和，
2. 我正在尝试执行mongo localhost:30158 /tmp/setupUsers.js。

但是，我从厨师那里收到此消息：

==> default:   * execute[Add Mongo Users] action run
==> default:
==> default:     [execute] MongoDB shell version v3.4.2
==> default:               connecting to: localhost:30158
==> default:               2017-03-06T10:56:56.875+0000 W NETWORK  [thread1] Failed to connect to 127.0.0.1:30158, in(checking socket
for error after poll), reason: Connection refused
==> default:               2017-03-06T10:56:56.879+0000 E QUERY    [thread1] Error: couldn't connect to server localhost:30158, connec
tion attempt failed :
==> default:               connect@src/mongo/shell/mongo.js:237:13
==> default:               @(connect):1:6
==> default:               exception: connect failed
==> default:
==> default:     ================================================================================
==> default:     Error executing action `run` on resource 'execute[Add Mongo Users]'
==> default:     ================================================================================
==> default:
==> default:     Mixlib::ShellOut::ShellCommandFailed
==> default:     ------------------------------------
==> default:     Expected process to exit with [0], but received '1'
==> default:     ---- Begin output of mongo localhost:30158 /tmp/setupUsers.js ----
==> default:     STDOUT: MongoDB shell version v3.4.2
==> default:     connecting to: localhost:30158
==> default:     2017-03-06T10:56:56.875+0000 W NETWORK  [thread1] Failed to connect to 127.0.0.1:30158, in(checking socket for error
after poll), reason: Connection refused
==> default:     2017-03-06T10:56:56.879+0000 E QUERY    [thread1] Error: couldn't connect to server localhost:30158, connection attem
pt failed :
==> default:     connect@src/mongo/shell/mongo.js:237:13
==> default:     @(connect):1:6
==> default:     STDERR: exception: connect failed
==> default:     ---- End output of mongo localhost:30158 /tmp/setupUsers.js ----
==> default:     Ran mongo localhost:30158 /tmp/setupUsers.js returned 1
==> default:
==> default:     Resource Declaration:
==> default:     ---------------------
==> default:     # In /var/chef/cache/cookbooks/berk/recipes/security.rb
==> default:
==> default:       6: execute "Add Mongo Users" do
==> default:       7:   command "mongo localhost:30158 /tmp/setupUsers.js"
==> default:       8: end
==> default:
==> default:     Compiled Resource:
==> default:     ------------------
==> default:     # Declared in /var/chef/cache/cookbooks/berk/recipes/security.rb:6:in `from_file'
==> default:
==> default:     execute("Add Mongo Users") do
==> default:       action [:run]
==> default:       retries 0
==> default:       retry_delay 2
==> default:       default_guard_interpreter :execute
==> default:       command "mongo localhost:30158 /tmp/setupUsers.js"
==> default:       backup 5
==> default:       returns 0
==> default:       user nil
==> default:       declared_type :execute
==> default:       cookbook_name "berk"
==> default:       recipe_name "security"
==> default:     end
==> default:
==> default:     Platform:
==> default:     ---------
==> default:     x86_64-linux
==> default:

您可以看到，似乎Mongod服务尚未运行，但是在输出消息结束时，厨师告诉我，该服务正在尝试重新启动延迟的服务通知。

==> default: [2017-03-06T10:56:56+00:00] INFO: Running queued delayed notifications before re-raising exception
==> default: [2017-03-06T10:56:56+00:00] INFO: template[/etc/mongod.conf] sending restart action to service[mongod] (delayed)
==> default: Recipe: mongodb3::default
==> default:   * service[mongod] action restart
==> default: [2017-03-06T10:56:57+00:00] INFO: service[mongod] restarted
==> default:
==> default:     - restart service service[mongod]
==> default: [2017-03-06T10:56:57+00:00] INFO: template[/opt/wildfly/standalone/configuration/standalone-full.xml] sending restart act
ion to service[wildfly] (delayed)

为什么直到厨师配置结束才开始使用此服务？启动Mongod服务后，我需要连接到Mongo

我已经看了看MongoDB3食谱。根据此行（MongoDB3食谱的默认配方），该服务应立即开始。

编辑

我正在使用MongoDB3食谱。mongodb3默认配方：

service 'mongod' do
  case node['platform']
    when 'ubuntu'
      if node['platform_version'].to_f >= 15.04
        provider Chef::Provider::Service::Systemd
      elsif node['platform_version'].to_f >= 14.04
        provider Chef::Provider::Service::Upstart
      end
  end
  supports :start => true, :stop => true, :restart => true, :status => true
  action :enable
  subscribes :restart, "template[#{node['mongodb3']['mongod']['config_file']}]", :delayed
  subscribes :restart, "template[#{node['mongodb3']['config']['mongod']['security']['keyFile']}", :delayed
end

Answer 1

我在食谱中的任何地方都看不到service[mongod]，但我想您在某个地方有以下行：

 service 'mongod' do
   action [:enable, :start]
 end

此时，厨师开始服务，但可能需要一些时间才能完全运行并响应请求。厨师不等待这一点，并继续运行食谱。

您可以几次尝试execute[Add Mongo Users]，直到这样成功为止：

execute "Add Mongo Users" do
  command "mongo localhost:30158 /tmp/setupUsers.js"
  retries 6 #times
  retry_delay 10 #seconds
end

这将使您的服务开始，然后在厨师失败之前。

重要：您还应该提出一些守护execute[Add Mongo Users]，因为否则它将在每个厨师运行时运行。

edit （显示service[mongod]资源后）

它没有 start 动作，这就是为什么未启动它的原因。所以添加

service 'mongod' do
  action :start
end

execute[Add Mongo Users]资源之前的某个地方。