/etc/resolv.conf is getting overwritten

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http://serverfault.com – I have set up my own bind9 DNS server and put into my /etc/resolv.conf nameserver domain mydomain.local and put the same content into /etc/resolvconf/resolv.conf.d/head still the dns fails once in a while and additional information (the ones from my hoster) are magically written into the etc/resolv.conf. Am I missing any service how manages this file and conflicts with bind9? (HowTos)