我在正在编写的剧本中具有以下任务（＆lt;> in＆lt;> in of debug语句旁边列出了以下任务）：
- debug: var=nrpe_installed.stat.exists <true>
- debug: var=force_install <true>
- debug: var=plugins_installed.stat.exists <true>
- name: Run the prep
include: prep.yml
when: (nrpe_installed.stat.exists == false or plugins_installed.stat.exists == true or force_install == true)
tags: ['prep']
- debug: var=nrpe_installed.stat.exists <true>
- debug: var=force_install <true>
- debug: var=force_nrpe_install <false>
- name: Install NRPE
include: install-nrpe.yml
when: (nrpe_installed.stat.exists == false or force_install == true or force_nrpe_install == true)
tags: ['install_nrpe']
vars:
nrpe_url: 'http://url.goes.here'
nrpe_md5: 3921ddc598312983f604541784b35a50
nrpe_version: 2.15
nrpe_artifact: nrpe-{{ nrpe_version }}.tar.gz
nagios_ip: {{ nagios_ip }}
config_dir: /home/ansible/config/
我正在使用以下命令运行它：
ansible-playbook install.yml -i $invFile --extra-vars="hosts=webservers force_install=True"
第一个包括运行，但第二个输出跳过：
skipping: [server1] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}
我的印象是，随着force_install == true评估true的条件检查应通过所有检查，这应该使整个when评估为true（因为它是一系列'或'或）。
适当设置变量时，我该如何运行？
编辑：
更改第二个Install NRPE时，将第二个包含在以下工作，但没有解释为什么Run the prep适当地运行：
工作：
when: (not nrpe_installed.stat.exists or force_install or force_nrpe_install)
也可以工作：
when: (nrpe_installed.stat.exists == false or plugins_installed.stat.exists == true or force_install == true)
不工作：
when: (nrpe_installed.stat.exists == false or force_install == true or force_nrpe_install == true)
播放该特定部分的截短（删除的重复）输出为：
TASK [debug] *******************************************************************
ok: [server2] => {
"nrpe_installed.stat.exists": true
}
TASK [debug] *******************************************************************
ok: [server2] => {
"plugins_installed.stat.exists": true
}
TASK [debug] *******************************************************************
ok: [server2] => {
"force_install": true
}
TASK [Run the prep] ************************************************************
included: /tasks/nrpe-install/prep.yml for server2, server3, server4, server5, server6, server7
TASK [Prep and configure for installation | Install yum packages] **************
ok: [server6] => (item=[u'gcc', u'glibc', u'glibc-common', u'gd', u'gd-devel', u'make', u'net-snmp', u'openssl-devel', u'unzip', u'tar', u'gzip', u'xinetd']) => {"changed": false, "item": ["gcc", "glibc", "glibc-common", "gd", "gd-devel", "make", "net-snmp", "openssl-devel", "unzip", "tar", "gzip", "xinetd"], "msg": "", "rc": 0, "results": ["gcc-4.1.2-55.el5.x86_64 providing gcc is already installed", "glibc-2.5-123.el5_11.3.i686 providing glibc is already installed", "glibc-common-2.5-123.el5_11.3.x86_64 providing glibc-common is already installed", "gd-2.0.33-9.4.el5_4.2.x86_64 providing gd is already installed", "gd-devel-2.0.33-9.4.el5_4.2.i386 providing gd-devel is already installed", "make-3.81-3.el5.x86_64 providing make is already installed", "net-snmp-5.3.2.2-20.el5.x86_64 providing net-snmp is already installed", "openssl-devel-0.9.8e-40.el5_11.x86_64 providing openssl-devel is already installed", "unzip-5.52-3.el5.x86_64 providing unzip is already installed", "tar-1.15.1-32.el5_8.x86_64 providing tar is already installed", "gzip-1.3.5-13.el5.centos.x86_64 providing gzip is already installed", "xinetd-2.3.14-20.el5_10.x86_64 providing xinetd is already installed"]}
TASK [Prep and configure for installation | Make nagios group] *****************
ok: [server2] => {"changed": false, "gid": 20002, "name": "nagios", "state": "present", "system": false}
TASK [Prep and configure for installation | Make nagios user] ******************
ok: [server6] => {"append": false, "changed": false, "comment": "User for Nagios NRPE", "group": 20002, "home": "/home/nagios", "move_home": false, "name": "nagios", "shell": "/bin/bash", "state": "present", "uid": 20002}
TASK [debug] *******************************************************************
ok: [server2] => {
"nrpe_installed.stat.exists": true
}
TASK [debug] *******************************************************************
ok: [server2] => {
"force_install": true
}
TASK [debug] *******************************************************************
ok: [server2] => {
"force_nrpe_install": false
}
TASK [Install NRPE] ************************************************************
skipping: [server2] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}
您需要将变量转换为布尔值：
force_install|bool == true
我不声称我理解其背后的逻辑。在Python中，任何非空字符串都应该是真实的。但是，当直接在条件下使用时，它会评估为false。
然后再次将字符串'yes'，'on'，'1'，'true'（不敏感）和1解释为true（请参阅源）。任何其他字符串都是错误的。
如果未定义force_install，您可能还需要设置默认值，因为它将导致 undfined变量错误：
force_install|default(false)|bool == true
是的...当然需要测试。我建议
-
| bool很好，除非您期望未定义的vars -
var is defined and (var | bool)如果您期望未定义的vars
default(False)可以长时间，您很高兴这些是 true 如果输入是不是从yaml中解析的。IE。通过--extra_vars CLI参数定义的变量是字符串。
"false"
"null"
"defined string"
希望这会有所帮助：
#!/usr/bin/env ansible-playbook
---
- name: Test truthiness
hosts: localhost
gather_facts: False
vars:
truthy_vars:
# TRUE
- True
- 1
- "true"
# FALSE
- "false"
- null
- False
- 0
# ERROR (invalid sytax error stops the loop of the first of these)
- "null"
- "defined string"
# ERROR
# truthy_var_undefined
# FALSE
truthy_var_defined:
tasks:
- name: Test truthy
debug:
msg: "is truthy"
ignore_errors: True # beware, the loo
when: item
loop: "{{ truthy_vars }}"
loop_control:
label: Test {{ item }}
- name: truthy_var_undefined
debug:
when: truthy_var_undefined
ignore_errors: true
- name: truthy_var_defined
debug:
when: truthy_var_defined
- name: Test | default(False)
hosts: localhost
gather_facts: False
vars:
default_pipe_vars:
# TRUE
- True
- 1
- "true"
# beware these:
- "false"
- "null"
- "defined string"
# FALSE
- null
- False
- 0
# FALSE
# default_pipe_undefined
# FALSE
default_pipe_defined:
tasks:
- name: Test | default(False)
debug:
msg: "is not | default(False)"
when: item | default(False)
loop: "{{ default_pipe_vars }}"
loop_control:
label: Test {{ item }}
- name: default_pipe_undefined | default(False)
debug:
when: default_pipe_undefined | default(False)
- name: default_pipe_defined | default(False)
debug:
when: default_pipe_defined | default(False)
- name: Test | bool
hosts: localhost
gather_facts: False
vars:
bool_vars:
# TRUE
- True
- 1
- "true"
# FALSE
- "defined string"
- "null"
- "false"
- null
- False
- 0
# ERROR
# bool_undefined
# FALSE
bool_defined:
tasks:
- name: Test bool parsing
debug:
msg: "parsed as true booleans"
when: item | bool
loop: "{{ bool_vars }}"
loop_control:
label: Test {{ item }}
- name: bool_undefined | bool
debug:
when: bool_undefined | bool
ignore_errors: true
- name: bool_defined var | bool
debug:
when: bool_defined | bool
- name: Test is defined and | bool
hosts: localhost
gather_facts: False
vars:
defined_bool_vars:
# TRUE
- True
- 1
- "true"
# FALSE
- "defined string"
- "null"
- "false"
- null
- False
- 0
# FALSE
# defined_bool_undefined
# FALSE
defined_bool_defined:
tasks:
- name: Test bool parsing
debug:
msg: "parsed as true booleans"
when:
- item is defined
- item | bool
loop: "{{ defined_bool_vars }}"
loop_control:
label: Test {{ item }}
- name: defined_bool_undefined | bool
debug:
when:
- defined_bool_undefined is defined
- defined_bool_undefined | bool
ignore_errors: true
- name: defined_bool_defined var | bool
debug:
when:
- defined_bool_defined is defined
- defined_bool_defined | bool
https://gist.github.com/kcd83/4ea23d201C271B58F1C4C4EF784444408657