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Added documentation about using a custom CA with Docker #268

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Added documentation about using a custom CA with Docker #268

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18 changes: 18 additions & 0 deletions README.rst
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Expand Up @@ -271,6 +271,24 @@ to the credentials. Note that PVE `supports Let's Encrypt`_ out ouf the box. In
many cases setting up trusted certificates is the better option than operating
with self-signed certs.

**Note on using Docker with a custom CA:**

When operating PVE with certificates signed by a custom Certificate Authority
(or a public CA certificate that is not yet included in the Docker image), and
the easiest way is to import the certificate into the local trust store of the
host (see this `SE answer`_ for Debian/Ubuntu) then bind mount the host's
ca-certificates.crt file, and set the ``REQUESTS_CA_BUNDLE`` enviroment variable
in Docker to use the CA bundle (otherwise the exporter will ignore it).

Docker Compose snippet:

.. code:: yaml

volumes:
- '/etc/ssl/certs/ca-certificates.crt:/etc/ssl/certs/ca-certificates.crt:ro'
environment:
- REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt

Proxmox VE Configuration
------------------------

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