Haveged

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This role installs haveged on a server.

"The haveged project is an attempt to provide an easy-to-use, unpredictable random number generator based upon an adaptation of the HAVEGE algorithm. Haveged was created to remedy low-entropy conditions in the Linux random device that can occur under some workloads, especially on headless servers. Current development of haveged is directed towards improving overall reliablity and adaptability while minimizing the barriers to using haveged for other tasks."

Requirements

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On CentOS flavours, you will need to ensure that you have the Extra Packages for Enterprise Linux (EPEL) repository. Various roles cover this on Galaxy and rather than choosing one I leave it to you to choose.

Role Variables

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haveged_pkg_state_latest

Default: false

Whether to use "present" or "latest" for package installation.

haveged_low_entropy_watermark

Default: 1024

The desired low entropy watermark to use in init files.

haveged_template_mode

Default: 0600

The desired file mode for the template. Debian only.

haveged_template_owner

Default: root Owner of the init file. Used for Debian only.

haveged_template_group

Default: root Group of the init file. Used for Debian only.

haveged_template_path

Default: /etc/default/haveged

File to be written to. Used for Debian only.

haveged_template_src

Default: debian.j2

Template to use for the init file. Used for Debian only.

####haveged_config_initd_path Default: /etc/init.d/haveged

Path to the init.d script. Used for CentOS/RHEL 6 only.

####[haveged_systemd_path][haveged_systemd_path] Default: /usr/lib/systemd/system/haveged.service

Path to the systemd service script

####[haveged_systemd_override][haveged_systemd_override] Default: True

Template in a systemd override of ExecStart into /etc/systemd/system/haveged.service.d/override.conf

Dependencies

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None.

Example Playbook

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Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:

%YAML 1.2
---
- hosts: production
  roles:
    - { role: shrikeh.haveged, haveged_low_entropy_watermark: 2048 }
...

License

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MIT

Author Information

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Contact me on Twitter @barney_hanlon