ansible:如何在centos 7上重新启动auditd服务得到关于依赖的错误

Question

在我的剧本中，我有一个更新 audit.rules 的任务，然后通知应该重新启动 auditd 服务的处理程序。

task:
  - name:  6.6.7 - audit rules configuration
    template: src=X/ansible/templates/auditd_rules.j2
              dest=/etc/audit/rules.d/audit.rules
              backup=yes
              owner=root group=root mode=0640
     notify:
   - restart auditd


  handlers:
    - name: restart auditd
      service: name=auditd state=restarted

当 playbook 运行时，会更新审计规则并请求重新启动 auditd，但这会失败，如下所示。

RUNNING HANDLER [restart auditd] ***********************************************
fatal: [ipX-southeast-2.compute.internal]: FAILED! => {"changed": false, "failed": true, "msg": "Unable to restart service auditd: Failed to restart auditd.service: Operation refused, unit auditd.service may be requested by dependency only.\n"}

当我查看auditd 的单元定义时，我可以看到rejectManualStop=yes。这就是我无法重新启动服务的原因吗？一个人如何来接受新的审计规则？

 systemctl cat auditd.service
# /usr/lib/systemd/system/auditd.service
[Unit]
Description=Security Auditing Service
DefaultDependencies=no
After=local-fs.target systemd-tmpfiles-setup.service
Conflicts=shutdown.target
Before=sysinit.target shutdown.target
RefuseManualStop=yes
ConditionKernelCommandLine=!audit=0
Documentation=man:auditd(8) https://people.redhat.com/sgrubb/audit/

[Service]
ExecStart=/sbin/auditd -n
## To not use augenrules, copy this file to /etc/systemd/system/auditd.service
## and comment/delete the next line and uncomment the auditctl line.
## NOTE: augenrules expect any rules to be added to /etc/audit/rules.d/
ExecStartPost=-/sbin/augenrules --load
#ExecStartPost=-/sbin/auditctl -R /etc/audit/audit.rules
ExecReload=/bin/kill -HUP $MAINPID
# By default we don't clear the rules on exit. To enable this, uncomment
# the next line after copying the file to /etc/systemd/system/auditd.service
#ExecStopPost=/sbin/auditctl -R /etc/audit/audit-stop.rules

[Install]
WantedBy=multi-user.target

Answer 1

这已在 Red Hat Bugzilla #1026648 中进行了探索、讨论和解决(大部分)。和 Anisble Issue # 22171 (github)报告。

分辨率

使用 ansible service模块参数use=service强制执行 /sbin/service实用程序而不是 systemd 的聚集事实值(调用 /sbin/systemctl )像这样:

- service: name=auditd state=restarted use=service

Example playbook (pastebin.com)

解决方法:

使用 ansible command模块来显式运行服务可执行文件，如下所示:

- command: /sbin/service auditd restart

分析——根本原因:

• This is an issue created by upstream packaging of auditd.service unit. It will not start/stop/restart when acted upon by systemctl, apparently by design.
• It is further compounded by the Ansible service control function, which uses the preferred method identified when system facts are gathered and "ansible_service_mgr" returns "systemd". This is regardless of the actual module used to manage the service.unit.
• RHEL dev team may fix if considered a problem in upcoming updates (ERRATA)
• Ansible dev team has offered a workaround and (as of 2.2) updated the service module with the use parameter.