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Merge pull request #3957 from mitchellh/clockskewhelp 

add some debugging info for if your clock is skewed
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Matthew Hooker 2016-10-04 16:45:35 -07:00 committed by GitHub
parent ed876f91df 24c4ba3bb5
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website/source/docs/builders/amazon.html.md
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@ -155,3 +155,17 @@ work, but specifics will depend on your use-case.
] ]
} }
``` ```
### Checking that system time is current
Amazon uses the current time as part of the [request signing
process](http://docs.aws.amazon.com/general/latest/gr/sigv4_signing.html). If
your system clock is too skewed from the current time, your requests might
fail. If that's the case, you might see an error like this:
==> amazon-ebs: Error querying AMI: AuthFailure: AWS was not able to validate the provided access credentials
If you suspect your system's date is wrong, you can compare it against
http://www.time.gov/. On Linux/OS X, you can run the `date` command to get the
current time. If you're on Linux, you can try setting the time with ntp by
running `sudo ntpd -q`.