Fedora 33: /proc/sys/write_wakeup_threshold: No such file or directory

[agross]

Describe the bug

When installing this in my playbook I receive the following error: sysctl: cannot stat /proc/sys/write_wakeup_threshold: No such file or directory

The sysctl is located at a different path:

$ find /proc/sys/ -name write_wakeup_threshold
/proc/sys/kernel/random/write_wakeup_threshold

$ uname -a
Linux playground 5.9.11-200.fc33.x86_64 #1 SMP Tue Nov 24 18:18:01 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Playbook

Please paste the playbook you are using. (Consider requirements.yml and
optionally the command you've invoked.)

---
- name: Apply common configuration to all nodes
  hosts: "{{ target | default('prod') }}"
  become: true
  roles:
    - name: robertdebock.haveged

requirements.yml:

- src: robertdebock.haveged

Output

TASK [robertdebock.haveged : include assert.yml] ********************************************************************************************************
included: /Users/agross/.ansible/roles/robertdebock.haveged/tasks/assert.yml for playground.home.therightstuff.de

TASK [robertdebock.haveged : test if haveged_write_wakeup_threshold is set correctly] *******************************************************************
ok: [playground.home.therightstuff.de]

TASK [robertdebock.haveged : install haveged] ***********************************************************************************************************
ok: [playground.home.therightstuff.de]

TASK [robertdebock.haveged : set write_wakeup_threshold] ************************************************************************************************
fatal: [playground.home.therightstuff.de]: FAILED! => changed=false
  msg: |-
    Failed to reload sysctl: kernel.random.write_wakeup_threshold = 1024
    sysctl: cannot stat /proc/sys/write_wakeup_threshold: No such file or directory

PLAY RECAP **********************************************************************************************************************************************
playground.home.therightstuff.de : ok=4    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0

Environment

• Control node OS: macOS
• Control node Ansible version: ansible 2.10.3
• Managed node OS: Fedora 33

Please consider sponsoring me.

[agross]

Seems like I still had an old version from Ansible Galaxy installed.

[agross]

Sorry to tell you that this seems to be caused by something entirely different. Setting the sysctl works if the role is included in a playbook like this:

- name: Apply common configuration to all nodes
  hosts: something
  become: true
  roles:
    - name: robertdebock.haveged

But when the haveged role is added as a dependency the error I reported is thrown:

roles/something/meta/main.yml:

allow_duplicates: false
dependencies:
  - name: robertdebock.haveged

Very strange.

[robertdebock]

I'll investigate. Could take a while, but thanks for following up.