Team,
当我只有一个节点或只有一个项目,但是我需要对其进行修改时,下面的任务就可以正常工作,但是对于存储在寄存器变量中的列表中返回的所有项目,我都需要对其进行修改。
- name: "Fetch all CPU nodes from clusters using K8s beta.kubernetes.io/instance-type"
k8s_info:
kind: Node
label_selectors:
- "beta.kubernetes.io/instance-type={{ kube_cpu_node_class }}"
verify_ssl: no
register: cpu_class_list
failed_when: not cpu_class_list.resources
我如何对带有循环或with_items的cpu_class_list变量中的所有节点执行此操作?
建议的解决方案,但不起作用
- name: "Fetch all CPU nodes from clusters using K8s beta.kubernetes.io/instance-type"
k8s_info:
kind: Node
label_selectors:
- "beta.kubernetes.io/instance-type={{ kube_cpu_node_class }}"
verify_ssl: no
register: cpu_class_list
failed_when: not {{ item }}
with_items: cpu_class_list.resources
具有两个节点的示例输出在下面
services-pre-install-checks : debug]
ok: [localhost] => {
"cpu_class_list": {
"changed": false,
"deprecations": [
{
"msg": "The 'k8s_facts' module has been renamed to 'k8s_info'",
"version": "2.13"
}
],
"failed": false,
"failed_when_result": false,
"resources": [
{
"apiVersion": "v1",
"kind": "Node",
"metadata": {
"annotations": {
"volumes.kubernetes.io/controller-managed-attach-detach": "true"
},
"creationTimestamp": "2019-07-16T00:23:27Z",
"labels": {
"nodeType": "cpu"
},
"name": "node1",
"nodeInfo": {
"architecture": "amd64",
}
}
},
{
{
"apiVersion": "v1",
"kind": "Node",
"metadata": {
"annotations": {
"volumes.kubernetes.io/controller-managed-attach-detach": "true"
},
"creationTimestamp": "2019-07-16T00:23:27Z",
"labels": {
"nodeType": "cpu"
},
"name": "node2",
"nodeInfo": {
"architecture": "amd64",
}
}
}
]
}
}
建议的解决方案:
- name: "Fetch all CPU nodes from clusters using K8s beta.kubernetes.io/instance-type"
k8s_facts:
kind: Node
label_selectors:
- "beta.kubernetes.io/instance-type={{ kube_cpu_node_class }}"
verify_ssl: no
register: cpu_class_list
failed_when: not cpu_class_list.resources
#above to fail when none of the nodes has label, that is resources list is empty.
#below to fail when any of the nodes has no label
- debug:
msg: "{{ item.metadata.labels.nodeType }}"
loop: "{{ cpu_class_list.resources }}"
loop_control:
label: "{{ item.metadata.name }}"
failed_when: not item.metadata.labels.nodeType
我建议将其分为两个不同的任务。首先,注册变量,然后使用fail
ansible模块(docs)检查var,如果满足条件则失败。
请参见以下代码段概述逻辑:
- hosts: localhost
vars:
test: # test array
- fail: false
- fail: false
- fail: true
- fail: false
tasks:
- name: iterate and fail
fail:
msg: "Fail as requested"
with_items: "{{ test }}"
when: item.fail
运行此命令,将输出以下内容:
$ ansible-playbook failing.yml
PLAY [localhost] ***********************
TASK [Gathering Facts] *************************
ok: [localhost]
TASK [iterate and fail] **************************
skipping: [localhost] => (item={u'fail': False})
skipping: [localhost] => (item={u'fail': False})
failed: [localhost] (item={u'fail': True}) => {"ansible_loop_var": "item", "changed": false, "item": {"fail": true}, "msg": "Failed as requested"}
skipping: [localhost] => (item={u'fail': False})
PLAY RECAP *****************
localhost : ok=1 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
希望这会有所帮助!
#在所有节点都没有标签,即资源列表为空时失败。
k8s_facts:
kind: Node
label_selectors:
- "beta.kubernetes.io/instance-type={{ kube_cpu_node_class }}"
verify_ssl: no
register: cpu_class_list
failed_when: not cpu_class_list.resources
#below to fail when any of the nodes has no label
- debug:
msg: "{{ item.metadata.labels.nodeType }}"
loop: "{{ cpu_class_list.resources }}"
loop_control:
label: "{{ item.metadata.name }}"
failed_when: not item.metadata.labels.nodeType