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joeklow
n00b
Joined: 23 Jan 2011
Posts: 46
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 Posted: Wed Apr 13, 2011 9:02 pm Post subject: resolv.conf question | hooking into /etc/init.d/net script |
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Hi all.
I have multiple network interfaces and a ton of mess around them including load balancing etc.
When interface X goes down via /etc/init.d/netX stop, it automatically removes all entries from resolv.conf, including those I added manually.
When DHCP starts for netX, it does the same (unfortunately netX has to get dynamic DNS via DHCP, so can't just add static route via dns_servers_netX).
Where and when does /etc/init.d/network changes /etc/resolv.conf? I need to put my own hook there, since it is also planned to use hacked udhcp(d) instead of dhcpd to keep interface IPs somewhere in /var/dhcp/$interface_ip_config. (by the way, where's initscripts dhcp module is stored? - need to modify it too)
Or, how to enable this functionality of resolvconf(5)?
NAME
resolvconf — a framework for managing multiple DNS configurations
SYNOPSIS
resolvconf -I
resolvconf [-m metric] [-p] -a interface <file
resolvconf [-f] -d interface
resolvconf -il pattern
resolvconf -u
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resolvconf solves this by letting the daemon send their resolv.conf(5) file to resolvconf via stdin(3) with the argument -a
interface instead of the filesystem. resolvconf then updates /etc/resolv.conf as it thinks best. When a local resolver
other than libc is installed, such as dnsmasq( or named(, then resolvconf will supply files that the resolver should be
configured to include.
resolvconf can mark an interfaces resolv.conf as private. This means that the name servers listed in that resolv.conf are
only used for queries against the domain/search listed in the same file. This only works when a local resolver other than
libc is installed. See resolvconf.conf(5) for how to configure resolvconf to use a local name server.
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I need multiple resolv.conf's for all interfaces of /etc/conf.d/net.. |
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Raptor85
Apprentice
Joined: 29 Dec 2007
Posts: 208
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| Posted: Thu Apr 14, 2011 1:46 am Post subject: |
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| add your entries into /etc/resolv.conf.head instead. |
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djinnZ
Advocate
Joined: 02 Nov 2006
Posts: 4831
Location: somewhere in L.O.S.
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| Posted: Thu Apr 14, 2011 8:44 am Post subject: |
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or better you can configure udev for mirror the NICs as different devices (only if you have multiple network to connect, as in a laptop) and use the ifup_*/ifdown_* function in /etc/conf.d/net.* (where * is the network interface) to set up resolv.conf and/or resolv.conf.head.
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