配置期间在每台 Vagrant 机器上运行的 Ansible 提供程序

Question

我正在创建一个调用 Ansible playbook 的 Vagrantfile。哪个运行良好。

我的问题是，由于我在 vagrant 上使用“每个”循环进行部署，因此每次创建机器时都会运行 Ansible 剧本。预期的行为是 Ansible 提供程序在所有 VM 启动后才运行。

我的 Vagrantfile 编码如下：

    # -*- mode: ruby -*-
# vi: set ft=ruby :
# Define Vagrant API version, the virtualization provider and the location of the param file and its name:
VAGRANTFILE_API_VERSION = "2"
VIRT_PROVIDER="virtualbox"
VM_PARAM_FILE = 'params.yml'
ANSIBLE_PLAYBOOK = "/Users/dzarpelon/Documents/DevOps/Projects/Confluence_Lab/ansible/playbook.yml"
#define secure ssh key location
ssh_pub_key = File.readlines("#{Dir.home}/.ssh/devops_key.pub").first.strip
# Require Yaml module, this is needed to read the 'params.yml' file.
require 'yaml'
# Read 'params.yml' file
servers = YAML.load_file(File.join(File.dirname(__FILE__), VM_PARAM_FILE))
# Create boxes as needed
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.provision "ansible" do |ansible|
      ansible.playbook = ANSIBLE_PLAYBOOK
      ansible.force_remote_user = TRUE
  end #end ansible provisioning
  # ensure that all Vagrant machines will use the same SSH key pair.
  config.ssh.insert_key = false
  if Vagrant.has_plugin?("vagrant-cachier")
    config.cache.scope = :box
  end #end of cache plugin configuration
  if Vagrant.has_plugin?("vagrant-hostmanager")
    config.hostmanager.enabled = true
    config.hostmanager.manage_host = true
    config.hostmanager.ignore_private_ip = false
    config.hostmanager.include_offline = true
  end # end of hostmanager plugin
  #execute for each entry on the params file
  servers.each do |servers|
    config.vm.define servers["name"] do |srv|
      srv.vm.box = servers["box"]
      srv.vm.network servers["network_type"], ip: servers["ip"]
      srv.vm.hostname = servers["name"]
      srv.hostsupdater.aliases = [servers["name"]]
      srv.vm.provider VIRT_PROVIDER do |v|
        v.name = servers["name"]
        v.memory = servers["ram"]
      end #end provider
    end # end config loop
  end # end servers loop


end #end of Vagrant.Configure

如您所见，Ansible 配置步骤是在“每个”循环之外完成的，并且在创建每个 VM 后仍会运行。

关于如何仅在所有虚拟机都由该循环创建后运行 Ansible 有什么想法吗？

非常感谢您的帮助！

Answer 1

The fine manual 似乎解决了您非常担心的问题，他们的建议是保护.provision 块仅在最后一台机器上运行，从而确保 - 根据他们的文档 - 配置将在最后一台机器上运行机器已启动。

根据您的使用情况，您需要切换到.each_index 以识别您何时到达最后一个：

  servers_length = servers.length
  servers.each_index do |s_idx|
     # your code snippet was also shadowing the global `servers`
     # by your block variable, which is a bug waiting to happen
     server = servers[s_idx]
     is_last = s_idx + 1 == servers_length

     config.vm.define servers["name"] do |srv|
       # ... all your other srv statements ...
       if is_last
         srv.vm.provision "ansible" do |ansible|
           ansible.limit = "all"
           ansible.playbook = ANSIBLE_PLAYBOOK
           ansible.force_remote_user = TRUE
         end
       end
     end
  end