t0a.yml

Question

I'm having trouble using hostvars to pass a variable to another host in a vagrant environment, the code I did:

Vagrant.configure("2") do |config|

    config.vm.define "server_1" do |server_1|
      server_1.vm.hostname = "n1"
      server_1.vm.box = "centos/7"
      server_1.vm.network "public_network", bridge: "wlp1s0", ip: "192.168.0.50"  
    end

    config.vm.define "worker_1" do |worker_1|
      worker_1.vm.hostname = "n2"
      worker_1.vm.box = "centos/7"
      worker_1.vm.network "public_network", bridge: "wlp1s0", ip: "192.168.0.51"
    end

    config.vm.provider "virtualbox" do |vb|
      vb.memory = 1024
    end

    config.vm.provision "ansible" do |ansible|
      ansible.playbook = "t0a.yml"
    end
 end

t0a.yml

---
- hosts: server*
  tasks:
  - set_fact: hello=world

- hosts: worker*
  tasks:
  - debug:
      msg: "{{ hostvars['server_1']['hello'] }}"

expected:

TASK [show] *******************************************************************
ok: [worker_1] => {
    "msg": [
        "works"
    ]
}

actual:

TASK [debug] ******************************************************************** fatal: [worker_1]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'hello'\n\nThe error appears to have been in '/home/kayke/Documentos/vm-vagrant/provision-ansible/centos/t0_tests/t0a.yml': line 8, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n tasks:\n - debug:\n ^ here\n"}

Answer 1

您想要的是一本同时针对服务器和工作者的剧本，并根据其主机模式进行匹配，因为那样就只有一个单次运行，而现在发生的是ansible正在运行运行两次，每个主机一次。因此：

- hosts: server*
  tasks:
  - set_fact: hello=world

- hosts: worker*
  tasks:
  - debug:
      msg: "{{ hostvars["server_1"]["hello"] }}"

并在最后调用，就像您在此处看到的：https://github.com/kubernetes-sigs/kubespray/blob/v2.8.3/Vagrantfile#L177-L193

我对Vagrant的研究还不足以知道它是否会为您写出清单文件，或者是什么，但是如果您需要一个示例，kubespray也会从所有已知的vms中生成清单文件：{{3 }}

如果您不喜欢这种方法，还可以使用https://github.com/kubernetes-sigs/kubespray/blob/v2.8.3/Vagrantfile#L69-L75来使ansible以可读取工作簿的方式写出主机的事实缓存，但是您可能会怀疑，这是吨的工作。

How to use hostvars in vagrant env

t0a.yml

1 个答案: