Centos 7 Network Manager overwriting resolv.conf

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Homework and Emergencies Emergency UNIX and Linux Support Centos 7 Network Manager overwriting resolv.conf
# 1  
RedHat Centos 7 Network Manager overwriting resolv.conf

Hi all,

I need to add domain and search parameters to resolv.conf, however network manager overwrites.

Setting the PEERDNS=No in the interface file seems to have no effect on this behaviour.

Sadly I cannot just disable NM as these are not my hosts, I'm just attempting to install a platform on them.

If I can modify Network Manager's behaviour over CLI or get it to enforce my chosen pragmas either would be great.

Thanks in advance...
# 2  

I'd think that the best way might be to modify the file and then run;

# chattr +i /etc/resolv.conf

This will stop the file being modified - However if the server is using DHCP to pick up it's IP lease you may have problems if the lease expires.


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# 3  
I discovered the joys of adding the DOMAIN=... pragma to /etc/sysconfig/network-scripts/ifcfg-${INTERFACE_ID}

Thanks all
# 4  
Originally Posted by Skrynesaver
I discovered the joys of adding the DOMAIN=... pragma to /etc/sysconfig/network-scripts/ifcfg-${INTERFACE_ID}

Thanks all
With the command nmcli you could let it do it for you.

nmcli con mod "<your connection name here>" ipv4.dns-search <your domain search here>
nmcli con mod "<your connection name here>" ipv4.dns <your dns ip here>
nmcli con reload "<your connection name here>"

Then, take a look at your ifcfg-x file.
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