saltstack jinja2 嵌套模板继承

Question

我在 saltstack 中遇到嵌套模板继承问题。

我期待 create_mon 将字符串 'ceph_mon_config' 传递给 create，然后拉取'ceph_mon_config 支柱中 cpu、mem 等的值到 prepare，它完成了繁重的工作。现在当渲染器到达时：

{% block cpu %}{{ pillar['{% block pillar_id %}{% endblock pillar_id %}']['cpu'] }}{% endblock cpu %}

貌似是按字面理解的：

Rendering SLS 'base:/apps/ceph/create-mon' failed: Jinja variable 'salt.pillar object' has no attribute '{% block pillar_id %}{% endblock pillar_id %}'

有什么想法吗？

谢谢！

create_mon.sls

{% extends "states/system/vm/create.sls" %}

{% block pillar_id %}ceph_mon_config{% endblock pillar_id %}

virsh create /kvmfs/vms/{{ pillar['ceph_mon_config']['hostname'] }}/config.xml:
  cmd.run:
    - requires:
      - sls: /states/system/vm/create

create.sls

{% extends "states/system/vm/prepare.sls" %}

{% block cpu %}{{ pillar['{% block pillar_id %}{% endblock pillar_id %}']['cpu'] }}{% endblock cpu %}
{% block mem %}{{ pillar['ceph_mon_config']['mem'] }}{% endblock mem %}
{% block network %}{{ pillar['ceph_mon_config']['network'] }}{% endblock network %}
{% block os %}{{ pillar['ceph_mon_config']['os'] }}{% endblock os %}
{% block hostname %}{{ pillar['ceph_mon_config']['hostname'] }}{% endblock hostname %}
{% block disk %}{{ pillar['ceph_mon_config']['disk'] }}{% endblock disk %}

prepare.sls

/kvmfs/vms/{% block hostname %}{% endblock hostname %}/config.xml:
  file.managed:
    - source: https://git.cybbh.space/vta/saltstack/raw/master/apps/virsh/files/common.xml
    - makedirs: True
    - template: jinja
    - skip_verify: True
    - defaults:
        name: {{ self.hostname() }}
        mem: {% block mem %}{% endblock mem %}
        cpu: {% block cpu %}{% endblock cpu %}
        network: {% block network %}{% endblock network %}

/kvmfs/vms/{{ self.hostname() }}/disk0.qcow2:
  file.copy:
    - source: /kvmfs/images/{% block os %}{% endblock os %}-latest

qemu-img resize /kvmfs/vms/{{ self.hostname() }}/disk0.qcow2 {% block disk %}{% endblock disk %}:
  cmd.run:
    - requires:
      - /kvmfs/vms/{{ self.hostname() }}/disk0.qcow2

/kvmfs/vms/{{ self.hostname () }}/data/meta-data:
  file.managed:
    - source: https://git.cybbh.space/vta/saltstack/raw/master/apps/virsh/files/common.metadata
    - makedirs: True
    - template: jinja
    - skip_verify: True
    - defaults:
        hostname: {{ self.hostname() }}

/kvmfs/vms/{{ self.hostname () }}/data/user-data:
  file.managed:
    - source: https://git.cybbh.space/vta/saltstack/raw/master/apps/virsh/files/common.userdata
    - makedirs: True
    - skip_verify: True

genisoimage -o /kvmfs/vms/{{ self.hostname () }}/config.iso -V cidata -r -J /kvmfs/vms/{{ self.hostname () }}/data/meta-data /kvmfs/vms/{{ self.hostname () }}/data/user-data:
  cmd.run:    
    - requires:
      - /kvmfs/vms/{{ self.hostname () }}/data/metadata
      - /kvmfs/vms/{{ self.hostname () }}/data/userdata

Answer 1

Jinja 不允许嵌套求值，但在使用 'extends' 时变量也会从模板传递到模板，而不仅仅是块。

create_mon

{% set pillar_id = 'ceph_mon_config' %}

创建

...
{% extends "states/system/vm/prepare.sls" %}

{% block cpu %}{{ pillar[pillar_id]['cpu'] }}{% endblock cpu %}
...

这按预期工作。

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