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如何在ansible中忽略警告

ansible-2.x ansible

user3398900 · 技术社区 · 6 年前

我在写剧本的时候一直试图忽略一个警告场景是我执行这个 virt-host-validate qemu 它会发出一个警告,如下所示。

root@n0:~/playbook_promenade# virt-host-validate 
QEMU: Checking for hardware virtualization : PASS
QEMU: Checking if device /dev/kvm exists :PASS
QEMU: Checking if device /dev/kvm is accessible : PASS
QEMU: Checking if device /dev/vhost-net exists : PASS
QEMU: Checking if device /dev/net/tun exists : PASS
QEMU: Checking for cgroup 'memory' controller support : PASS
QEMU: Checking for cgroup 'memory' controller mount-point : PASS
QEMU: Checking for cgroup 'cpu' controller support : PASS
QEMU: Checking for cgroup 'cpu' controller mount-point: PASS
QEMU: Checking for cgroup 'cpuacct' controller support : PASS
QEMU: Checking for cgroup 'cpuacct' controller mount-point : PASS
QEMU: Checking for cgroup 'devices' controller support : PASS
QEMU: Checking for cgroup 'devices' controller mount-point : PASS
QEMU: Checking for cgroup 'net_cls' controller support : PASS
QEMU: Checking for cgroup 'net_cls' controller mount-point : PASS
QEMU: Checking for cgroup 'blkio' controller support : PASS
QEMU: Checking for cgroup 'blkio' controller mount-point : PASS
QEMU: Checking for device assignment IOMMU support  : WARN (No ACPI DMAR table found, IOMMU either disabled in BIOS or not supported by this hardware platform)`

我写的剧本如下。

`- hosts: localhost
   sudo: yes
   tasks:
    - name: Check if Host supports Virtualization.
      command: virt-host-validate qemu 
      ignore_errors: yes
      failed_when: false
      changed_when: false
      register: host_status
    - debug:
       msg: "status: {{host_status.stdout}}"`

现在,令人担忧的是,除了警告之外,是否还有其他任务失败了,这个剧本在我们使用 ignore_errors: yes 有人能告诉我怎么修理吗?? 提前谢谢。

2 回复 | 直到 6 年前

user3398900 6 年前

我可以用这个来解决。

  tasks:
   - name: Check if Host supports Virtualization.
     command: virt-host-validate qemu
     register: command_result
     failed_when:
       - "'FAIL' in command_result.stderr"

Noam Manos wim 6 年前

您还可以将它作为post任务在整个角色上运行,因此将验证该角色中的每个任务,并且仅当它具有非零返回代码或包含“error”或“fail”的stderr时,该任务才会失败。

在所有命令/shell任务中,注册输出:

- name: A shell task
  shell: |
    # your commands ...
  register: out

然后在主角色上,添加一个post任务,该任务将在每个任务之后检查错误:

- name: A role of shell/command tasks
  roles:
  - role: ...
  ...
  post_tasks:
  - name: Checking if command failed, or if stderr contains errors/failures
    fail: msg={{ out.stderr.split('\n') }}
    when: out is defined and out.stderr is defined and (out.stderr | lower | regex_search('error|fail') or out.rc != 0)