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nixos/doc: added the Prometheus changes to the 19.09 release notes

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Bas van Dijk 2019-04-08 19:39:22 +02:00
parent eed84d1f8d
commit 29d7d8f44d
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37
nixos/doc/manual/release-notes/rl-1909.xml
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@ -37,7 +37,42 @@
<itemizedlist>
<listitem>
<para />
<para>
Besides the existing <option>services.prometheus</option> module which
targets Prometheus-1 a new <option>services.prometheus2</option> module
has been added which targets Prometheus-2.
</para>
<para>
Both modules can be enabled at the same time. In fact
<link xlink:href="https://prometheus.io/docs/prometheus/latest/migration/#storage">
this is needed for upgrading existing Prometheus-1 data to Prometheus-2
</link>.
</para>
</listitem>
</itemizedlist>
</section>
<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-release-19.09-incompatibilities">
<title>Backward Incompatibilities</title>
<para>
When upgrading from a previous release, please be aware of the following
incompatible changes:
</para>
<itemizedlist>
<listitem>
<para>
The option <option>services.prometheus.dataDir</option> has been
removed. The directory where Prometheus will store its metric data will
now always be set to <literal>/var/lib/prometheus</literal> and to
<literal>/var/lib/prometheus2</literal> when using
<option>services.prometheus2</option>.
</para>
</listitem>
</itemizedlist>
</section>