selectattr中的Ansible jinja2转义虚线键
我目前正在尝试循环k8s_事实的子集。我的事实看起来像:selectattr中的Ansible jinja2转义虚线键,ansible,jinja2,Ansible,Jinja2,我目前正在尝试循环k8s_事实的子集。我的事实看起来像: { "resources": [ { "metadata": { "annotations": { "com.foo.bar/name": "foo", "com.foo.bar/foo-name": "baz" }, "creationTimestamp": "2018-12-20T02:29:50Z", "name": "foo
{
"resources": [
{
"metadata": {
"annotations": {
"com.foo.bar/name": "foo",
"com.foo.bar/foo-name": "baz"
},
"creationTimestamp": "2018-12-20T02:29:50Z",
"name": "foo-bar"
}
},
...
我想筛选com.foo.bar/foo-name键的特定值。由于该键具有.、-和/,因此无法与Jinja2 selectattr函数配合使用。我试图做那样的事,但没有成功:
- debug:
msg: "{{ item }}"
loop: "{{ my_fact.resources | selectattr('metadata.annotations[\\'com.foo.bar/foo-name\\']', 'defined') | selectattr('metadata.annotations[\\'com.foo.bar/foo-name\\']', 'match', 'baz') | list }}"
loop_control:
label: "{{ item.metadata.name }}"
执行上一个命令时,我得到以下错误:
fatal: [<redacted>]: FAILED! => {"msg": "template error while templating string: expected token ',', got 'com'. String: {{ my_fact.resources | selectattr('metadata.annotations[\\\\'com.foo.bar/foo-name\\\\']', 'defined') | selectattr('metadata.annotations[\\\\'com.foo.bar/foo-name\\\\']', 'match', 'baz') | list }}"}
我的问题是,如何在Jinja2中转义包含点的复杂字符串?Q:我想筛选com.foo.bar/foo-name键的特定值
A:下面的任务就可以了
- debug:
msg: "{{ resources|json_query(my_query) }}"
vars:
my_query: '[?metadata.annotations."com.foo.bar/foo-name"==`baz`]'
当我在ansible进入逃离地狱时,我倾向于利用。其优点是,它允许您编写jinja块,而不必用引号将它们括起来,从而消除了一个引用级别,因此也消除了一个转义级别 在您的情况下,我认为您可以直接使用,而不是管道一长串的过滤器 这是一个演示剧本:
---
- name: Test var names with dots
hosts: localhost
gather_facts: false
vars:
my_fact: {
"resources": [
{
"metadata": {
"annotations": {
"com.foo.bar/name": "foo",
"com.foo.bar/foo-name": "baz"
},
"creationTimestamp": "2018-12-20T02:29:50Z",
"name": "foo-bar"
}
},
{
"metadata": {
"annotations": {
"com.foo.bar/name": "toto",
"com.foo.bar/foo-name": "titi"
},
"creationTimestamp": "2018-12-21T02:30:50Z",
"name": "foo-bla"
}
},
{
"metadata": {
"annotations": {
"com.foo.bar/name": "johnsmith",
"com.foo.bar/foo-name": "baz"
},
"creationTimestamp": "2018-12-22T02:31:50Z",
"name": "foo-john"
}
}
]
}
tasks:
- name: Show results where metadata.annotations."com.foo.bar/foo-name"=='baz'
vars:
query: >-
[?(metadata.annotations."com.foo.bar/foo-name")=='baz']
debug:
msg: "{{ item }}"
loop: "{{ my_fact.resources | json_query(query) }}"
loop_control:
label: "{{ item.metadata.name }}"
结果呢
PLAY [Test var names with dots] *******************************************************************************************************************************************************************************************
TASK [Show results where metadata.annotations."com.foo.bar/foo-name"=='baz'] **********************************************************************************************************************************************
ok: [localhost] => (item=foo-bar) => {
"msg": {
"metadata": {
"annotations": {
"com.foo.bar/foo-name": "baz",
"com.foo.bar/name": "foo"
},
"creationTimestamp": "2018-12-20T02:29:50Z",
"name": "foo-bar"
}
}
}
ok: [localhost] => (item=foo-john) => {
"msg": {
"metadata": {
"annotations": {
"com.foo.bar/foo-name": "baz",
"com.foo.bar/name": "johnsmith"
},
"creationTimestamp": "2018-12-22T02:31:50Z",
"name": "foo-john"
}
}
}
PLAY RECAP ****************************************************************************************************************************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
如果我只想显示标记值,我想这会起作用。我想过滤事实,但保持对象的完整性。非常有趣。我不知道您可以使用json查询。我使用了你的解决方案,效果很好。非常感谢您抽出时间: