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Add info about haveged to gpg/randomness note (#8227)

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George Hartzell 2018-05-21 13:57:03 -07:00 committed by Adam J. Stewart
parent 15634c20fe
commit e954686e5a
1 changed files with 18 additions and 3 deletions
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21
lib/spack/docs/getting_started.rst
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@ -1064,9 +1064,12 @@ Secret keys may also be later exported using the
Key creation speed Key creation speed
The creation of a new GPG key requires generating a lot of random numbers. The creation of a new GPG key requires generating a lot of random numbers.
Depending on the entropy produced on your system, the entire process may Depending on the entropy produced on your system, the entire process may
take a long time (even a few minutes). To speed it up you may install take a long time (*even appearing to hang*). Virtual machines and cloud
tools like ``rngd``, which is usually available as a package in the host OS. instances are particularly likely to display this behavior.
On e.g. an Ubuntu machine you need to give the following commands:
To speed it up you may install tools like ``rngd``, which is
usually available as a package in the host OS. On e.g. an
Ubuntu machine you need to give the following commands:
.. code-block:: console .. code-block:: console
@ -1075,6 +1078,18 @@ Secret keys may also be later exported using the
before generating the keys. before generating the keys.
Another alternative is ``haveged``, which can be installed on
RHEL/CentOS machines as follows:
.. code-block:: console
$ sudo yum install haveged
$ sudo chkconfig haveged on
`This Digital Ocean tutorial
<https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged>`_
provides a good overview of sources of randomness.
^^^^^^^^^^^^ ^^^^^^^^^^^^
Listing keys Listing keys
^^^^^^^^^^^^ ^^^^^^^^^^^^