英文:
How to output loop.index in jinja
问题
我想要能够将loop.index的迭代输出到我的模板中，我正在使用Ansible，我有一个模板文件.j2和一个包含以下组的清单文件
[all_servers]
app01 ansible_host=10.10.1.100
app02 ansible_host=10.10.1.102
app03 ansible_host=10.10.1.103
app04 ansible_host=10.10.1.104
app05 ansible_host=10.10.1.105
app06 ansible_host=10.10.1.106
在这个文件中有一个jinja值
/kafka_certification/kafka.server01.keystore.jk
我想将这个jinja文件复制到所有节点，并且我想在 [ server0{{ loop.index }} ] 的部分使用loop.index，因为每个节点都有不同的jinja文件，例如，对于app02，是kafka.server02.keystore，对于app03，是kafka.server03.keystore，对于app04，是kafka.server04.keystore，对于app05，是kafka.server05.keystore，对于app06，是kafka.server06.keystore。循环依赖于我的清单主机组[all_servers]。
我该如何实现这个？
Ansible模板中的循环索引怎么用？
英文:
I want to be able to output the loop.index iteration to my template , i am using ansible and i have template file.j2 and inventory file have the below group
[all_servers]
app01 ansible_host=10.10.1.100
app02 ansible_host=10.10.1.102
app03 ansible_host=10.10.1.103
app04 ansible_host=10.10.1.104
app05 ansible_host=10.10.1.105
app06 ansible_host=10.10.1.106
I have jinja file inside this file value
/kafka_certification/kafka.server01.keystore.jk
> So i want copy this jinja file to all nodes and i want use loop.index
> in part of [ server0{{ loop.index }} ] because each node have
> different jinja file for example kafka.server02.keystore for
> app02 kafka.server03.keystore for app03
> kafka.server04.keystore for app04 kafka.server05.keystore for
> app05 kafka.server06.keystore for app06 .. loop depend on my
> inventory host group [all_servers]
how i can do this
ansible loop index for ansible template
答案1
得分: 1
以下是代码片段的翻译：
- hosts: all
tasks:
- debug:
msg: "将 {{ file }} 复制到 {{ item }}"
loop: "{{ ansible_play_hosts_all }}"
loop_control:
extended: true
vars:
index: "{{ '%02d' % ansible_loop.index }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
run_once: true
delegate_to: localhost
结果（缩减）：
msg: 将 /kafka_certification/kafka.server01.keystore.jk 复制到 app01
msg: 将 /kafka_certification/kafka.server02.keystore.jk 复制到 app02
msg: 将 /kafka_certification/kafka.server03.keystore.jk 复制到 app03
msg: 将 /kafka_certification/kafka.server04.keystore.jk 复制到 app04
msg: 将 /kafka_certification/kafka.server05.keystore.jk 复制到 app05
msg: 将 /kafka_certification/kafka.server06.keystore.jk 复制到 app06
下面是另一种更简单的方法，不需要循环：
- hosts: all
tasks:
- debug:
msg: "将 {{ file }} 复制到 {{ inventory_hostname }}"
vars:
idx: "{{ ansible_play_hosts_all.index(inventory_hostname) + 1 }}"
index: "{{ '%02d' % idx|int }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
这个选项与Ansible的上下文相符。参见 Plays。
最后，以下是问题和答案的翻译：
Q: "将文件复制到所有节点。在清单主机组 [all_servers] 上使用 loop.index"
A: 在这种特定情况下，以下Play给出了相同的结果：
- hosts: all_servers
tasks:
- debug:
msg: "将 {{ file }} 复制到 {{ inventory_hostname }}"
vars:
idx: "{{ groups.all_servers.index(inventory_hostname) + 1 }}"
index: "{{ '%02d' % idx|int }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
希望这些翻译有帮助！
英文:
The play below shows how you can use the index
- hosts: all
tasks:
- debug:
msg: "Copy {{ file }} to {{ item }}"
loop: "{{ ansible_play_hosts_all }}"
loop_control:
extended: true
vars:
index: "{{ '%02d' % ansible_loop.index }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
run_once: true
delegate_to: localhost
gives (abridged)
msg: Copy /kafka_certification/kafka.server01.keystore.jk to app01
msg: Copy /kafka_certification/kafka.server02.keystore.jk to app02
msg: Copy /kafka_certification/kafka.server03.keystore.jk to app03
msg: Copy /kafka_certification/kafka.server04.keystore.jk to app04
msg: Copy /kafka_certification/kafka.server05.keystore.jk to app05
msg: Copy /kafka_certification/kafka.server06.keystore.jk to app06
<hr>
There is a simpler approach. The play below gives the same result without iteration
- hosts: all
tasks:
- debug:
msg: "Copy {{ file }} to {{ inventory_hostname }}"
vars:
idx: "{{ ansible_play_hosts_all.index(inventory_hostname) + 1 }}"
index: "{{ '%02d' % idx|int }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
This option complies with the Ansible context. See Plays:
> ... playbook object maps managed nodes (hosts) to tasks.
<hr>
Q: "Copy file to all nodes. Use loop.index on inventory host group [all_servers]"
A: In this particular case the play below gives the same result
- hosts: all_servers
tasks:
- debug:
msg: "Copy {{ file }} to {{ inventory_hostname }}"
vars:
idx: "{{ groups.all_servers.index(inventory_hostname) + 1 }}"
index: "{{ '%02d' % idx|int }}"
file: "/kafka_certification/kafka.server{{ index }}.keystore.jk"
<sup>
PLAY [all_servers] ****************************************************************************
TASK [debug] **********************************************************************************
ok: [app02] =>
msg: Copy /kafka_certification/kafka.server02.keystore.jk to app02
ok: [app01] =>
msg: Copy /kafka_certification/kafka.server01.keystore.jk to app01
ok: [app04] =>
msg: Copy /kafka_certification/kafka.server04.keystore.jk to app04
ok: [app03] =>
msg: Copy /kafka_certification/kafka.server03.keystore.jk to app03
ok: [app05] =>
msg: Copy /kafka_certification/kafka.server05.keystore.jk to app05
ok: [app06] =>
msg: Copy /kafka_certification/kafka.server06.keystore.jk to app06
PLAY RECAP ************************************************************************************
app01: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
app02: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
app03: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
app04: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
app05: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
app06: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
</sup>
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