Ansible set_fact跨越扮演

Question

我必须运行ansible剧本来执行以下任务

1）计算YYYY_MM_DD日期格式，然后使用这个前缀从AWS一些文件下载到我的本地机器。文件名格式如下：2015_06_04_latest_file.csv

2）然后我需要创建一个名为2015_06_04的文件夹到多个主机上，然后在那里上传这个文件。

这是我目前的剧本 -

--- 
- hosts: 127.0.0.1 
    connection: local 
    sudo: yes 
    gather_facts: no 
    tasks: 
    - name: calculate date 
    shell: date "+%Y_%m_%d" --date="1 days ago" 
    register: output 
    - name: set date variable 
    set_fact: latest_date={{ item }} 
    with_items: output.stdout_lines 
    - local_action: command mkdir -p /tmp/latest_contracts/{{ latest_date }} 
    - local_action: command /root/bin/aws s3 cp s3://primarydatafolder/data/{{ latest_date }}_latest_data.csv /tmp/latest_contracts/{{ latest_date }}/ creates=/tmp/latest_contracts/{{ latest_date }}/latest_data.csv 
    register: result 
    ignore_errors: true 
    - local_action: command /root/bin/aws s3 cp s3://secondarydatafolder/data/{{ latest_date }}_latest_data.csv /tmp/latest_contracts/{{ latest_date }}/ creates=/tmp/latest_contracts/{{ latest_date }}/latest_data.csv 
    when: result|failed 
# remove the date prefix from the downloaded file 
    - local_action: command ./rename_date.sh {{ latest_date }} 
    ignore_errors: true 
- hosts: contractsServers 
    sudo: yes 
    gather_facts: no 
    tasks: 
    - name: create directory 
    file: path={{item.path}} state=directory mode=0775 owner=root group=root 
    with_items: 
    - {path: '/var/mukul/contracts/{{ latest_date }}' } 
    - {path: '/var/mukul/contracts/dummy' } 
    - name: copy dummy contracts 
    copy: src=dummy dest=/var/mukul/contracts/ 
    - name: delete previous symlink 
    shell: unlink /var/mukul/contracts/latest 
    ignore_errors: true 
    - name: upload the newly created latest date folder to the host 
    copy: src=/tmp/latest_contracts/{{ latest_date }} dest=/var/mukul/contracts/ 
    - name: create a symbolic link to the folder on the host and call it latest 
    action: file state=link src=/var/mukul/contracts/{{ latest_date }} dest=/var/mukul/contracts/latest 

按ansible对set_fact可变文档，这个变量LATEST_DATE应该是整个戏剧可用。然而，ansible失败，出现以下消息

failed: [192.168.101.177] => (item={'path': u'/var/mukul/contracts/{# latest_date #}'}) => {"failed": true, "item": {"path": "/var/mukul/contracts/{# latest_date #}"}} 
msg: this module requires key=value arguments (['path=/var/mukul/contracts/{#', 'latest_date', '#}', 'state=directory', 'mode=0775', 'owner=root', 'group=root']) 

看起来好像第二个剧本是无法得到的LATEST_DATE事实的价值。你能告诉我我犯了什么错误吗？

Answer 1

事实是特定于主机的。正如documentation about set_fact所说，“[v] ariables [以set_fact设置]在逐个主机的基础上设置”。

相反，如Delegation, rolling updates, and local actions定义，这样我会尝试使用run_once：

- hosts: contractsServers 
    tasks: 
    - name: Determine date 
     local_action: shell: date "+%Y_%m_%d" --date="1 days ago" 
     register: yesterday 
     always_run: True 
     changed_when: False 
     run_once: True 
    - name: Do something else locally 
     local_action: ... 
     register: some_variable_name 
     always_run: True 
     changed_when: False 
     run_once: True 

    - name: Do something remotely using the variables registered above 
     ... 

Answer 2

您可以启用fact-caching。您将需要设置一个本地redis实例，然后将存储事实。