简单的剧本：
- hosts: all
vars:
ulogin: login
upasswd: passwd
user_login_with_password:
- user_login: "{{ ulogin }}"
user_passwd: "{{ upasswd }}"
tasks:
- debug: msg="{{ item.user_login }} -- {{ item.user_passwd }}"
when: item.user_passwd != None
loop: "{{ user_login_with_password }}"
loop_control:
label: "{{ item.user_login }}"
结果：
TASK [debug] *****************************************************************************************
ok: [host1] => (item=login) => {
"msg": "login -- passwd"
}
一切安好！
我们删除密码：
- hosts: all
vars:
ulogin: login
upasswd:
user_login_with_password:
- user_login: "{{ ulogin }}"
user_passwd: "{{ upasswd }}"
tasks:
- debug: msg="{{ item.user_login }} -- {{ item.user_passwd }}"
when: item.user_passwd != None
loop: "{{ user_login_with_password }}"
loop_control:
label: "{{ item.user_login }}"
结果：
TASK [debug] *****************************************************************************************
skipping: [host1] => (item=login)
skipping: [host1]
为什么会出现双重“跳过”动作？？？
PS 详细输出：
skipping: [host1] => (item=login) => {
"ansible_loop_var": "item",
"item": {
"user_login": "login",
"user_passwd": null
}
}
skipping: [host1] => {
"msg": "All items skipped"
}
答案1
这不是双重操作。最后一条消息表示循环中的所有项目都被跳过。例如，给定包含更多项目的简化列表
user:
- passwd:
- passwd:
- passwd:
调试任务
- debug:
var: item.passwd
loop: "{{ user }}"
when: item.passwd != None
register: out
给出
skipping: [host1] => (item={'passwd': None})
skipping: [host1] => (item={'passwd': None})
skipping: [host1] => (item={'passwd': None})
skipping: [host1]
或更详细 (-v)
skipping: [host1] => (item={'passwd': None}) =>
ansible_loop_var: item
false_condition: item.passwd != None
item:
passwd: null
skipping: [host1] => (item={'passwd': None}) =>
ansible_loop_var: item
false_condition: item.passwd != None
item:
passwd: null
skipping: [host1] => (item={'passwd': None}) =>
ansible_loop_var: item
false_condition: item.passwd != None
item:
passwd: null
skipping: [host1] =>
msg: All items skipped
您看到最后一条消息msg: All items skipped是因为开发人员决定报告此事
if res['skipped']:
res['msg'] = 'All items skipped'
查看注册的变量
out:
changed: false
msg: All items skipped
results:
- ansible_loop_var: item
changed: false
false_condition: item.passwd != None
item:
passwd: null
skip_reason: Conditional result was False
skipped: true
- ansible_loop_var: item
changed: false
false_condition: item.passwd != None
item:
passwd: null
skip_reason: Conditional result was False
skipped: true
- ansible_loop_var: item
changed: false
false_condition: item.passwd != None
item:
passwd: null
skip_reason: Conditional result was False
skipped: true
skipped: true
的值out.skipped是真的因为所有项目都被跳过了。否则，该值将是错误的最后一个skipping: [host1]将会丢失。例如，
user:
- passwd: a
- passwd: b
- passwd:
给出
ok: [host1] => (item={'passwd': 'a'}) =>
ansible_loop_var: item
item:
passwd: a
item.passwd: a
ok: [host1] => (item={'passwd': 'b'}) =>
ansible_loop_var: item
item:
passwd: b
item.passwd: b
skipping: [host1] => (item={'passwd': None})
您可以避免这种复杂性。最佳做法是选择列表中的项目，而不是在每次迭代时测试条件。例如，
- debug:
var: item.passwd
loop: "{{ user | selectattr('passwd') }}"
register: out
在这种情况下，所有密码如果为无，您将看到简单的报告
skipping: [host1]
和注册变量
out:
changed: false
results: []
skipped: true
skipped_reason: No items in the list
答案2
如果使用 ssh-keys 列表，可以这样做：
- hosts: all
gather_facts: false
vars:
ulogin1: login1
usshkeys1: [sshkey1]
ulogin2: login2
usshkeys2: []
ulogin3: login3
usshkeys3:
- sshkey31
- sshkey32
- sshkey33
user_login_with_sshkeys:
- user_login: "{{ ulogin1 }}"
ssh_keys: "{{ usshkeys1 }}"
- user_login: "{{ ulogin2 }}"
ssh_keys: "{{ usshkeys2 }}"
- user_login: "{{ ulogin3 }}"
ssh_keys: "{{ usshkeys3 }}"
tasks:
- debug: msg="{{ item.0.user_login }} -- {{ item.1 }}"
loop: "{{ user_login_with_sshkeys | ansible.builtin.subelements('ssh_keys') }}"
loop_control:
label: "{{ item.0.user_login }}"
结果：
ok: [host1] => (item=login1) => {
"msg": "login1 -- sshkey1"
}
ok: [host1] => (item=login3) => {
"msg": "login3 -- sshkey31"
}
ok: [host1] => (item=login3) => {
"msg": "login3 -- sshkey32"
}
ok: [astra175] => (item=login3) => {
"msg": "login3 -- sshkey33"
}
留下一个空变量：
- hosts: all
gather_facts: false
vars:
ulogin1: login1
usshkeys1: [sshkey1]
ulogin2: login2
usshkeys2: []
ulogin3: login3
usshkeys3:
- sshkey31
- sshkey32
- sshkey33
user_login_with_sshkeys:
# - user_login: "{{ ulogin1 }}"
# ssh_keys: "{{ usshkeys1 }}"
- user_login: "{{ ulogin2 }}"
ssh_keys: "{{ usshkeys2 }}"
# - user_login: "{{ ulogin3 }}"
# ssh_keys: "{{ usshkeys3 }}"
tasks:
- debug: msg="{{ item.0.user_login }} -- {{ item.1 }}"
loop: "{{ user_login_with_sshkeys | ansible.builtin.subelements('ssh_keys') }}"
loop_control:
label: "{{ item.0.user_login }}"
结果：
skipping: [host1]