Docs addition on decrypting Zuul secrets

As this does come up from time to time, record an example command
for decrypting a Zuul secret.

Change-Id: I056bb808ecf0f44cfa5b448521e3f28d04eeffcf
This commit is contained in:
Jeremy Stanley 2019-02-19 18:40:11 +00:00
parent a23cd84a69
commit 7323108d4a

View File

@ -137,3 +137,19 @@ Mergers. These are horizontally scalable components of Zuul which
perform git operations for the benefit of jobs. They can be started
and stopped at will, and new ones added as necessary to accommodate
load.
Secrets
-------
In some cases it may be warranted to compare the decrypted plaintext of
a secret from job configuration against a reference value while
troubleshooting, since random padding means encrypting the same
plaintext a second time will result in wholly different ciphertext. In
order to avoid unintentional disclosure this should only be done when
absolutely necessary, but it's possible to decrypt a secret locally on
the scheduler server with a command like the following (just extract the
secret ciphertext from the job configuration first to remove surrounding
YAML, there is no need to dedent nor recombine split lines)::
cat ciphertext.txt | base64 -d | sudo openssl rsautl -decrypt -oaep -inkey \
/var/lib/zuul/keys/secrets/project/gerrit/openstack-infra/project-config/0.pem