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dns-cache doku polish

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Tarnatos 2017-04-26 14:17:59 +02:00 committed by GitHub
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commit 1ab295c29c
1 changed files with 12 additions and 5 deletions
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17
docs/features/dns-cache.rst
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@ -8,12 +8,19 @@ dns-cache may be used on a node. The dnsmasq instance listening on port
upstream servers and a specific cache size if the options listed below are
added to site.conf. Upstream servers are the DNS servers which are normally
used by the nodes to resolve hostnames (e.g. gateways/supernodes).
If they are set the node will cache as much DNS records as set with
'cacheentries' in RAM. All settings are optional, though if no dns server
is set, the configuration will not be altered by gluon-core.
Besides caching dns requests from clients, the next_node-addresses are set to
resolve to a configurable name that may optionally be placed in next_node.name.
There are the following settings:
servers
cacheentries
If both options are set the node will cache as much DNS records as set with
'cacheentries' in RAM. The 'servers' list will be used to resolve the received
DNS-queries if the request cannot be answered from cache.
If these settings do not exist, the cache is not intialized and RAM-usage will not increase.
When next_node.name is set, an A-record and an AAAA-record for the
next-node-IP are placed in the dnsmasq configuration. This means that the content
of next_node.name may be resolved even without upstream connectivity.
::