Ansible:同时部署在多个主机上 [英] Ansible: deploy on multiple hosts in the same time

问题描述

是否可以运行如下所示的ansible剧本(这是该站点的示例: http://docs. ansible.com/playbooks_roles.html ):

- name: this is a play at the top level of a file
  hosts: all
  remote_user: root
  tasks:
  - name: say hi
    tags: foo
    shell: echo "hi..."

- include: load_balancers.yml
- include: webservers.yml
- include: dbservers.yml

在多线程模式下?

我想同时运行三个"includes"(无论如何将其部署到不同的主机)，如下图所示:

http://www.gliffy.com/go/publish/5267618

有可能吗?

解决方案

从Ansible 2.0开始，剧本上似乎有一个名为strategy的选项.将策略设置为free时，剧本在每个主机上播放任务，而无需等待其他主机.参见 http://docs.ansible.com/ansible/playbooks_strategies.html .

看起来像这样(取自上面的链接):

- hosts: all
  strategy: free
  tasks:
  ...

请注意，我没有检查此内容，而我非常是Ansible的新手.我只是对做您描述的事情感到好奇，并且碰巧发现了这种策略性的事情.

这似乎并不是您要尝试执行的操作.如下所述，也许异步任务"更合适: http://docs.ansible.com/ansible/playbooks_async.html .

这包括在任务上指定async和poll.以下摘自我提到的第二个链接:

- name: simulate long running op, allow to run for 45 sec, fire and forget
  command: /bin/sleep 15
  async: 45
  poll: 0

我想如果任务很长，您可以指定更长的async次.您可能可以通过这种方式定义三个并发任务.

Is it possible to run ansible playbook, which looks like this (it is an example from this site: http://docs.ansible.com/playbooks_roles.html):

- name: this is a play at the top level of a file
  hosts: all
  remote_user: root
  tasks:
  - name: say hi
    tags: foo
    shell: echo "hi..."

- include: load_balancers.yml
- include: webservers.yml
- include: dbservers.yml

in multithread mode?

I want to run three "includes" in the same time (it is deploying to different hosts anyway), like in this diagram:

http://www.gliffy.com/go/publish/5267618

Is it possible?

解决方案

As of Ansible 2.0 there seems to be an option called strategy on a playbook. When setting the strategy to free, the playbook plays tasks on each host without waiting to the others. See http://docs.ansible.com/ansible/playbooks_strategies.html.

It looks something like this (taken from the above link):

- hosts: all
  strategy: free
  tasks:
  ...

Please note that I didn't check this and I'm very new to Ansible. I was just curious about doing what you described and happened to come acroess this strategy thing.

EDIT:

It seems like this is not exactly what you're trying to do. Maybe "async tasks" is more appropriate as described here: http://docs.ansible.com/ansible/playbooks_async.html.

This includes specifying async and poll on a task. The following is taken from the 2nd link I mentioned:

- name: simulate long running op, allow to run for 45 sec, fire and forget
  command: /bin/sleep 15
  async: 45
  poll: 0

I guess you can specify longer async times if your task is lengthy. You can probably define your three concurrent task this way.

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