有一个很不错的剧本，用于检索ceph池配置，页数。 输出存储在JSON，我无法仅存储/检索stdout值的问题。想法是将stdout值用于另一个循环，从而创建具有完全相同页数的池
具有
- name: retrieve number of pg for all metric pools
shell: ceph osd pool get {{ item.poolname }} pgp_num -f json
loop: "{{ metricspools }}"
register: poolpg
- name: output poolpg
set_fact:
pgout: "{{ poolpg.stdout | from_json }}"
- debug: var=pgout
给我错误
FAILED! => {"msg": "Unexpected templating type error occurred on ({{ poolpg.stdout | from_json }}): expected string or buffer"}
但是，如果我改为关注
- name: output poolpg
set_fact:
pgout: "{{ poolpg }}"
- debug: var=pgout
然后将打印包含所有字符串（包括必需的stdout值）的整个JSON 整个JSON输出：
ok: [es-si-ce-dev-998.admin] => {
"poolpg": {
"changed": true,
"msg": "All items completed",
"results": [
{
"_ansible_ignore_errors": true,
"_ansible_item_result": true,
"_ansible_no_log": false,
"_ansible_parsed": true,
"changed": true,
"cmd": "ceph osd pool get staniX pgp_num -f json",
"delta": "0:00:00.251288",
"end": "2019-12-10 16:43:09.160898",
"failed": false,
"invocation": {
"module_args": {
"_raw_params": "ceph osd pool get staniX pgp_num -f json",
"_uses_shell": true,
"chdir": null,
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"warn": true
}
},
"item": {
"poolname": "staniX",
"poolnum": 3174
},
"rc": 0,
"start": "2019-12-10 16:43:08.909610",
"stderr": "",
"stderr_lines": [],
"stdout": "\n{\"pool\":\"staniX\",\"pool_id\":3174,\"pgp_num\":128}",
"stdout_lines": [
"",
"{\"pool\":\"staniX\",\"pool_id\":3174,\"pgp_num\":128}"
]
},
{
"_ansible_ignore_errors": true,
"_ansible_item_result": true,
"_ansible_no_log": false,
"_ansible_parsed": true,
"changed": true,
"cmd": "ceph osd pool get staniY pgp_num -f json",
"delta": "0:00:00.252257",
"end": "2019-12-10 16:43:10.753515",
"failed": false,
"invocation": {
"module_args": {
"_raw_params": "ceph osd pool get staniY pgp_num -f json",
"_uses_shell": true,
"chdir": null,
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"warn": true
}
},
"item": {
"poolname": "staniY",
"poolnum": 3175
},
"rc": 0,
"start": "2019-12-10 16:43:10.501258",
"stderr": "",
"stderr_lines": [],
"stdout": "\n{\"pool\":\"staniY\",\"pool_id\":3175,\"pgp_num\":64}",
"stdout_lines": [
"",
"{\"pool\":\"staniY\",\"pool_id\":3175,\"pgp_num\":64}"
]
}
]
}
}
答案 0 :(得分：0)
您在具有循环的任务上注册poolpg。因此，poolpg.stdout不存在，但poolpg.results[0].stdout存在。而且，这些结果与最初循环的元素一样多。
要在结果中的所有stdout中列出json对象的列表，请使用以下示例：
stdout中的poolpg.results属性from_json过滤器映射到每个元素pgout中并显示结果---
- name: Parse several results as json strings
hosts: localhost
gather_facts: false
vars:
# Your data reduced to a single json line.
# Structured view available in your question
poolpg: {"changed": true, "msg": "All items completed", "results": [{"_ansible_ignore_errors": true, "_ansible_item_result": true, "_ansible_no_log": false, "_ansible_parsed": true, "changed": true, "cmd": "ceph osd pool get staniX pgp_num -f json", "delta": "0:00:00.251288", "end": "2019-12-10 16:43:09.160898", "failed": false, "invocation": {"module_args": {"_raw_params": "ceph osd pool get staniX pgp_num -f json", "_uses_shell": true, "chdir": null, "creates": null, "executable": null, "removes": null, "stdin": null, "warn": true}}, "item": {"poolname": "staniX", "poolnum": 3174}, "rc": 0, "start": "2019-12-10 16:43:08.909610", "stderr": "", "stderr_lines": [], "stdout": "\n{\"pool\":\"staniX\",\"pool_id\":3174,\"pgp_num\":128}", "stdout_lines": ["", "{\"pool\":\"staniX\",\"pool_id\":3174,\"pgp_num\":128}"]}, {"_ansible_ignore_errors": true, "_ansible_item_result": true, "_ansible_no_log": false, "_ansible_parsed": true, "changed": true, "cmd": "ceph osd pool get staniY pgp_num -f json", "delta": "0:00:00.252257", "end": "2019-12-10 16:43:10.753515", "failed": false, "invocation": {"module_args": {"_raw_params": "ceph osd pool get staniY pgp_num -f json", "_uses_shell": true, "chdir": null, "creates": null, "executable": null, "removes": null, "stdin": null, "warn": true}}, "item": {"poolname": "staniY", "poolnum": 3175}, "rc": 0, "start": "2019-12-10 16:43:10.501258", "stderr": "", "stderr_lines": [], "stdout": "\n{\"pool\":\"staniY\",\"pool_id\":3175,\"pgp_num\":64}", "stdout_lines": ["", "{\"pool\":\"staniY\",\"pool_id\":3175,\"pgp_num\":64}"]}]}
tasks:
- name: Read each stdout as json
set_fact:
pgout: "{{ poolpg.results | map(attribute='stdout') | map('from_json') | list }}"
- name: Show result
debug:
var: pgout
哪个给：
PLAY [Parse several results as json strings] ****************************************************************************************************************************************************************************************************************************
TASK [Read each stdout as json] *****************************************************************************************************************************************************************************************************************************************
ok: [localhost]
TASK [Show result] ******************************************************************************************************************************************************************************************************************************************************
ok: [localhost] => {
"pgout": [
{
"pgp_num": 128,
"pool": "staniX",
"pool_id": 3174
},
{
"pgp_num": 64,
"pool": "staniY",
"pool_id": 3175
}
]
}
PLAY RECAP **************************************************************************************************************************************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0