厨师：延迟服务通知

Question

这是我的MongoDB的菜谱食谱：

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 

正如你可以看到：

1. 我安装蒙戈3.4和
2. 我试图执行mongo localhost:30158 /tmp/setupUsers.js。

   ==> 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: 
   

   正如你所看到的，这似乎mongod的服务未在输出信息的末尾还没有运行，不过，师傅告诉：

不过，我从厨师收到此消息我试图重新启动延迟服务通知。

==> 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后才能启动此服务？我需要在mongod服务启动后连接到mongo

我看了一下mongodb3的食谱。 According to this line（mongodb3配方的默认配方），服务应立即开始。

编辑

我使用mongodb3配方。 mongodb3默认食谱：

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

我没有看到service[mongod]在你的食谱任何地方，但我想你了以下行某处：

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

此时厨师启动该服务，但它可能需要一些时间才能完全运行并响应请求。厨师不会等待，并继续运行食谱。

你可以尝试execute[Add Mongo Users]几次，直到成功为止是这样的：

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

这会给你的服务一分钟开始，前厨师将失败。

重要提示：你也应该想出一些防范execute[Add Mongo Users]，因为否则它会运行在每个厨师跑。

编辑（后显示service[mongod]资源。）

它不具备开始行动，这就是为什么它没有启动。所以加上

service 'mongod' do 
    action :start 
end 

在execute[Add Mongo Users]之前的某处资源。