使用 with_items 连接字符串并分配给 Ansible 中的变量

问题描述

我需要在启动 ec2_instances 时将两个 2 IP 保存到 vars_file 中的一个变量中，以便稍后在部署期间使用.

I need to save two 2 IPs to a variable in a vars_file when launching ec2_instances, which are used later during deployment.

这就是我保存单个服务器 IP 的方式:

This is how I am saving a single server ip:

- name: Save server public IP to vars file
  lineinfile: line="server_public_ip{{':'}} {{ item.public_ip }}"
              dest="{{ansible_env.HOME}}/dynamic_ips_{{ec2_environment}}"
  with_items: server.instances  #server is registered in previous task

我在 dynamic_ips 文件中的输出是 server_public_ip: xxx.xxx.xx.x

The output I have in dynamic_ips file is server_public_ip: xxx.xxx.xx.x

现在我有 2 台服务器启动并注册为服务器.

Now I have 2 servers launched and registered as servers.

我需要将其保存为 server_public_ips: xxx.xx.x.xx , xxx.x.xx.x

I need to save this as server_public_ips: xxx.xx.x.xx , xxx.x.xx.x

我尝试声明一个空字符串并向其附加 ips，类似这样，但出现错误.

I tried to declare an empty string and append ips to it, something like this, but I am getting errors.

set_fact:
   ips: ""
set_fact:
   ips: " {{ ips }} + {{ item.public_ip}} "
with_items: servers.instances  #servers is registered in previous task
lineinfile: line="server_public_ips{{':'}} {{ ips }}"
            dest="{{ansible_env.HOME}}/dynamic_ips_{{ec2_environment}}"

我认为可以使用 lineinfile insertafter 和 regex 来完成.

I think it can be done using lineinfile insertafter and regex.

最后，我需要在不同的服务器上执行此操作，

Finally, I need this to do this in a different server,

- name: Restrict access to outside world
  command: iptables INPUT {{ item }} ACCEPT
  with_items: {{ server_public_ips }}.split(,) #grant access for each ip
  command: iptables INPUT DROP

推荐答案

set_fact:
   ips: " {{servers.instances | join(',') }} "

当servers.instances 是一个列表时应该可以正常工作.

should actually work when servers.instances is a list.

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