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asfgit merged 1 commit into from
Sep 12, 2016
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Advise running ntpd on Brooklyn server #106

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1 change: 1 addition & 0 deletions guide/ops/production-installation.md
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Expand Up @@ -34,6 +34,7 @@ Then configure the server as follows:
* check that the [linux kernel entropy]({{ site.path.guide }}/ops/troubleshooting/increase-entropy.html) is sufficient
* check that the [ulimit values]({{ site.path.guide }}/ops/troubleshooting/increase-system-resource-limits.html) are sufficiently high
* ensure external libraries are up-to-date, including `nss` for SSL.
* ensure the time is continually accurate, ideally by running a service like the [ntp daemon](http://www.ntp.org/).


### <a id="download"></a>Download Apache Brooklyn
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11 changes: 7 additions & 4 deletions guide/ops/troubleshooting/deployment.md
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Expand Up @@ -40,9 +40,12 @@ means there was some problem obtaining or connecting to the machine.
An error like `... Not authorized to access cloud ...` usually means the wrong identity/credential was used.

AWS requires a X-Amz-Date header which contains the date of the Apache Brooklyn AWS client.
If the date on the server is wrong, for example several minutes behind you will get Authorization Exception.
Please be sure that the machine which is running Apache Brooklyn set its clock correctly.
To set the time on Linux we advice to use the ntp client: `sudo ntpdate pool.ntp.org`.
If the date on the server is wrong, for example several minutes behind you will get an
Authorization Exception. This is to prevent replay attacks. Please be sure to set the clock
correctly on the machine running Apache Brooklyn. To set the time on Linux you can use the ntp
client (e.g. `sudo ntpdate pool.ntp.org`). We advise running the
[ntp daemon](http://www.tldp.org/LDP/sag/html/basic-ntp-config.html) so that the clock is kept
continually in sync.

An error like `Unable to match required VM template constraints` means that a matching image (e.g. AMI in AWS terminology) could not be found. This
could be because an incorrect explicit image id was supplied, or because the match-criteria could not
Expand Down Expand Up @@ -177,4 +180,4 @@ brooklyn.locations:
identity: <add>
credential: <add>
loginUser: centos
{% endhighlight %}
{% endhighlight %}