Copy file from one remote server to another remote server using nested delegate_to

问题

As a user I want to copy file from node1 to node2. Is it possible with copy module + delegate_to

Below is what I was trying to do. Playbook is running from node3.

Playbook Sample

---
- name: Gather Facts for all hosts
  hosts: all
  gather_facts: true
  any_errors_fatal: true
  become: true

- name: Test
  hosts: all
  gather_facts: false
  any_errors_fatal: true
  become: true
  roles:
    - role: test

Role Sample

---
- block:
    - include_tasks: test.yml
      any_errors_fatal: true
      run_once: true

Task Sample

---
 - name: Test
   block:
    - name: Transfer files from node1 to node2
      copy:
        src: /tmp/a
        dest: /tmp/
      delegate_to: node2

  delegate_to: node1

回答1:

The short answer is no: you will not be able to do this with the copy module.

You might however want to have a look at the synchronize module

Quoting the doc

The “local host” can be changed to a different host by using delegate_to. This enables copying between two remote hosts or entirely on one remote machine.

You would basically end up with something like:

---
- name: Rsync some files
  hosts: my_target_host

  tasks:
    - name: copy my file
      synchronize:
        src: path/on/source/host
        dest: path/on/dest/host
      delegate_to: my_source_host

Edit I just found this article referencing synchronize as well as the fetch/copy method that you might want to look at.

回答2:

You can use synchronize module only when rsync is enabled either in source server (kube master in your case) or in the kube nodes.

Method 1: to push from master, need rsync enabled in master

Synchronize use push mode by default

- hosts: nodes
  tasks:
    - name: Transfer file from master to nodes
      synchronize:
        src: /src/path/to/file
        dest: /dest/path/to/file
      delegate_to: "{{ master }}"

Method 2: to use fetch and copy modules

 - hosts: all
   tasks:
     - name: Fetch the file from the master to ansible
       run_once: yes
       fetch: src=/src/path/to/file dest=temp/ flat=yes
       when: "{{ ansible_hostname == 'master' }}"
     - name: Copy the file from the ansible to nodes
       copy: src=temp/file dest=/dest/path/to/file
       when: "{{ ansible_hostname != 'master' }}"

Hope this helps.

来源：https://stackoverflow.com/questions/56977103/copy-file-from-one-remote-server-to-another-remote-server-using-nested-delegate

标签

ansible