我正在尝试学习 jinja 和 Ansible。这是在 RHEL 7.9 上,
ansible 2.9.27
ansible python module location = /usr/lib/python2.7/site-packages/ansible
executable location = /bin/ansible
python version = 2.7.5 (default, May 27 2022, 11:27:32) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]
我进行此练习的唯一原因是学习。但我很困惑。为什么这不产生一个列表found_route_list
(这是一个列表)?
- name: Populate appended route list
set_fact:
found_added_routes: |-
{%- set blah = [] %}
{%- for line in found_route_list %}
{%- set _ = blah.append(line) %}
{%- endfor %}
{{ blah }}
我的剧本首先收集服务器上的路由:
- name: Get route info
shell: /usr/sbin/ip route show | sed -e 's/ proto.*//'
register: cmdtmp
changed_when:
- cmdtmp.stdout | length == 0
- name: Get route list
set_fact:
found_route_list: "{{ cmdtmp.stdout.split('\n') }}"
虽然只是产生几行输出,如下所示:
default via 10.13.99.1 dev bond0.99
10.13.101.0/23 dev p1p1.101
128.1.66.227 via 10.13.101.1 dev p1p1.101
我使用以下命令对其执行上述附加操作set_fact
to found_added_routes
。然后我调试:
- name: Debug found_route_list
debug:
msg: "Found route list: {{ item }}"
loop: "{{ found_route_list }}"
- name: Debug found_added_routes
debug:
msg: "Found: {{ item }}"
loop: "{{ found_added_routes }}"
这是我的输出:
TASK [networks : Debug found_route_list] **********************************************************************************************************************
ok: [server01.example.com] => (item=default via 10.13.99.1 dev bond0.99) => {
"msg": "Found route list: default via 10.13.99.1 dev bond0.99"
}
ok: [server01.example.com] => (item=10.13.101.0/24 dev p1p1.101) => {
"msg": "Found route list: 10.13.101.0/24 dev p1p1.101"
}
ok: [server01.example.com] => (item=128.1.66.227 via 10.13.101.1 dev p1p1.101) => {
"msg": "Found route list: 128.1.66.227 via 10.13.101.1 dev p1p1.101"
}
TASK [networks : Debug found_added_routes] ********************************************************************************************************************
fatal: [server01.example.com]: FAILED! => {"msg": "Invalid data passed to 'loop', it requires a list, got this instead: [u'default via 10.13.99.1 dev bond0.99', u'10.13.101.0/24 dev p1p1.101', u'128.1.66.227 via 10.13.101.1 dev p1p1.101']. Hint: If you passed a list/dict of just one element, try adding wantlist=True to your lookup invocation or use q/query instead of lookup."}
我尝试像这样创建列表,但得到相同的输出:
- name: Populate appended route list
set_fact:
found_added_routes: "{%- set blah = [] %}
{%- for line in found_route_list %}
{%- set _ = blah.append(line) %}
{%- endfor %}
{{ blah }}"
另外,我已经看到了语法set_fact
,你可以这样做:set_fact: |-
但在我的一生中,我找不到任何文档或参考资料。你能给我指出一些可以解释它的东西吗?
Thanks.