Question

我当时正在查看Ansible https://docs.ansible.com/ansible/2.7/user_guide/playbooks_loops.html的“循环”页面，但找不到所需的内容...

我想测试“源”主机是否可以到达/连接到一组端口上的一组目标主机。例如，每组目标主机可以是一个清单组，并且每个清单组都有自己要测试的端口的列表。

这个想法是只指定两个var作为剧本的输入：一组主机组列表和一个或多个源主机列表。

应该如何进行循环？清单可以是YAML或INI文件：每个组一个或多个。 TCP连接的测试很容易...因此，重点仅放在输入变量和循环结构上。

感谢和问候。

Stef

Answer 1

给出以下hosts库存文件

server1
server2
server3

[dev]
d1
d2
d3

[dev:vars]
ports=8080,8443

[int]
i1
i2
i3

[int:vars]
ports=80,443

和以下剧本play.yml

---
- hosts: all
  gather_facts: False
  vars:
    group: 'dev'

  tasks:
  - name: Just loop through a group and group_vars
    debug:
      msg: 'group is {{group}} target is {{item.0}} port is {{item.1}}'
    loop: >
      {{ groups[group] |
         product(hostvars[groups[group][0]]["ports"]) |
         list }}

您可以按照说明浏览清单

ansible-playbook -i hosts play.yml -l server* -e group=int

产生以下结果：

PLAY [all] *********************************************************************

TASK [Just loop through a group and group_vars] ********************************
ok: [server1] => (item=[u'i1', 80]) => {
    "msg": "group is int target is i1 port is 80"
}
ok: [server1] => (item=[u'i1', 443]) => {
    "msg": "group is int target is i1 port is 443"
}
ok: [server2] => (item=[u'i1', 80]) => {
    "msg": "group is int target is i1 port is 80"
}
ok: [server2] => (item=[u'i1', 443]) => {
    "msg": "group is int target is i1 port is 443"
}
ok: [server1] => (item=[u'i2', 80]) => {
    "msg": "group is int target is i2 port is 80"
}
ok: [server3] => (item=[u'i1', 80]) => {
    "msg": "group is int target is i1 port is 80"
}
ok: [server1] => (item=[u'i2', 443]) => {
    "msg": "group is int target is i2 port is 443"
}
ok: [server3] => (item=[u'i1', 443]) => {
    "msg": "group is int target is i1 port is 443"
}
ok: [server2] => (item=[u'i2', 80]) => {
    "msg": "group is int target is i2 port is 80"
}
ok: [server1] => (item=[u'i3', 80]) => {
    "msg": "group is int target is i3 port is 80"
}
ok: [server3] => (item=[u'i2', 80]) => {
    "msg": "group is int target is i2 port is 80"
}
ok: [server2] => (item=[u'i2', 443]) => {
    "msg": "group is int target is i2 port is 443"
}
ok: [server1] => (item=[u'i3', 443]) => {
    "msg": "group is int target is i3 port is 443"
}
ok: [server3] => (item=[u'i2', 443]) => {
    "msg": "group is int target is i2 port is 443"
}
ok: [server2] => (item=[u'i3', 80]) => {
    "msg": "group is int target is i3 port is 80"
}
ok: [server3] => (item=[u'i3', 80]) => {
    "msg": "group is int target is i3 port is 80"
}
ok: [server2] => (item=[u'i3', 443]) => {
    "msg": "group is int target is i3 port is 443"
}
ok: [server3] => (item=[u'i3', 443]) => {
    "msg": "group is int target is i3 port is 443"
}

PLAY RECAP *********************************************************************
server1                    : ok=1    changed=0    unreachable=0    failed=0
server2                    : ok=1    changed=0    unreachable=0    failed=0
server3                    : ok=1    changed=0    unreachable=0    failed=0

例如，您只需要用wait_for module替换调试即可。

Ansible嵌套循环遍历库存

1 个答案: