Add docs for host configuration steps
Change-Id: I4d5057b6a7f5d6116d007cc11b40198b815f0cbd Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
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Preliminary host configuration
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==============================
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If you use standalone bare metal servers, or if you experience issues with a
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Calico bird daemon and networking for a Kubernetes cluster VMs, ensure that
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netfilter for bridge interfaces is disabled for your host node(s):
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.. code:: sh
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echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables
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Otherwise, bird daemon inside Calico won't function correctly because of
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libvirt and NAT networks. More details can be found in this
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`bug <https://bugzilla.redhat.com/show_bug.cgi?id=512206>`_.
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