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Today's Topics:
1. Are global directives needed in additional dhcpd conf files?
(project722)
2. Re: Are global directives needed in additional dhcpd conf
files? (Dave C)
3. Re: Are global directives needed in additional dhcpd conf
files? (Bob Harold)
----------------------------------------------------------------------
Message: 1
Date: Mon, 20 Aug 2018 09:25:25 -0500
From: project722 <project...@gmail.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Are global directives needed in additional dhcpd conf files?
Message-ID:
<capbqmzbap-iv+9uhogteowzco5u9igqzpr91-kek2ptyhpk...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi guys!
We are about to start using multiple config files for our dhcp markets.
I've created a folder called "include.d". The path is:
/etc/dhcp/include.d/
In my main dhcpd conf I've added the "include" directive:
include "/etc/dhcp/include.d/another-config.conf";
Inside the "anotherconfig" file I have started off the file with the
"subnet" directive.
subnet 192.168.100.0 netmask 255.255.255.0 {
etc..,etc..
I have no global config. Things such as:
authoritative;
ddns-update-style none;
option domain-name-servers x.x.x.x x.x.x.x;
default-lease-time 604800;
Do I need to define these in my "anotherconfig" conf file? Or will it
inherit the global directives by design?
TIA!
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Message: 2
Date: Mon, 20 Aug 2018 10:42:56 -0500
From: Dave C <d...@gvtc.drakkar.org>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>, project722
<project...@gmail.com>
Subject: Re: Are global directives needed in additional dhcpd conf
files?
Message-ID: <74d58c74-804f-a14f-4486-d9574fb42...@gvtc.drakkar.org>
Content-Type: text/plain; charset=utf-8; format=flowed
I've been leveraging include files for what seems like forever.
Think of an include file as if you dropped whatever was pointed to it into your
config at that
exact point.
So, to answer your question, if you have a "global" type directive above that
point in your
config file "stream", then it's still active until it is overwritten with a
later directive.
You can even set an include into the middle of a config construct, for example,
you can open a
shared-network configuration, then include individual files for different
aspects of the
configuration, then close the shared-network and continue your config stream. I
heavily leverage
this so that I can have tools like dhcpd-pools run against a filtered version
of my "master
dhcp" config that removes the private subnets that are included in a shared
network (for our
internal devices). Otherwise those massive private subs would mask a public
pool from showing
it's empty of IPs or about to run out.
The privates are used for things like video set top boxes etc and need to
co-exist in the same
shared network, but don't need to have external public IPs.
Hope this helps... includes simply insert a big set of text into the stream at
their location.
Period.
Dave
On 8/20/18 09:25, project722 wrote:
> Hi guys!
>
> We are about to start using multiple config files for our dhcp markets.
>
> I've created a folder called "include.d". The path is:
>
> /etc/dhcp/include.d/
>
> In my main dhcpd conf I've added the "include" directive:
>
> include "/etc/dhcp/include.d/another-config.conf";
>
> Inside the "anotherconfig" file I have started off the file with the "subnet"
> directive.
>
> subnet 192.168.100.0 netmask 255.255.255.0 {
>
> etc..,etc..
>
> I have no global config. Things such as:
>
> authoritative;
> ddns-update-style none;
> option domain-name-servers x.x.x.x x.x.x.x;
> default-lease-time 604800;
>
> Do I need to define these in my "anotherconfig" conf file? Or will it inherit
> the global
> directives by design?
>
> TIA!
>
>
>
>
>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users@lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
------------------------------
Message: 3
Date: Mon, 20 Aug 2018 14:31:23 -0400
From: Bob Harold <rharo...@umich.edu>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Are global directives needed in additional dhcpd conf
files?
Message-ID:
<CA+nkc8C7fa3+xzc-fpoS+MVMtVsez54FQBbziQUP=rf6y3g...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Mon, Aug 20, 2018 at 11:43 AM Dave C <d...@gvtc.drakkar.org> wrote:
> I've been leveraging include files for what seems like forever.
>
> Think of an include file as if you dropped whatever was pointed to it into
> your config at that
> exact point.
>
> So, to answer your question, if you have a "global" type directive above
> that point in your
> config file "stream", then it's still active until it is overwritten with
> a later directive.
>
> You can even set an include into the middle of a config construct, for
> example, you can open a
> shared-network configuration, then include individual files for different
> aspects of the
> configuration, then close the shared-network and continue your config
> stream. I heavily leverage
> this so that I can have tools like dhcpd-pools run against a filtered
> version of my "master
> dhcp" config that removes the private subnets that are included in a
> shared network (for our
> internal devices). Otherwise those massive private subs would mask a
> public pool from showing
> it's empty of IPs or about to run out.
>
> The privates are used for things like video set top boxes etc and need to
> co-exist in the same
> shared network, but don't need to have external public IPs.
>
> Hope this helps... includes simply insert a big set of text into the
> stream at their location.
> Period.
>
> Dave
>
That brings to mind a question - for DNS (BIND) I can use "named-checkconf
-p" to print out a 'named.conf' file that has all the 'includes' processed,
and comes out as one big file, so I can verify that it is actually getting
what I expected.
Is there an equivalent of "named-checkconf -p" for dhcpd ?
--
Bob Harold
On 8/20/18 09:25, project722 wrote:
> > Hi guys!
> >
> > We are about to start using multiple config files for our dhcp markets.
> >
> > I've created a folder called "include.d". The path is:
> >
> > /etc/dhcp/include.d/
> >
> > In my main dhcpd conf I've added the "include" directive:
> >
> > include "/etc/dhcp/include.d/another-config.conf";
> >
> > Inside the "anotherconfig" file I have started off the file with the
> "subnet" directive.
> >
> > subnet 192.168.100.0 netmask 255.255.255.0 {
> >
> > etc..,etc..
> >
> > I have no global config. Things such as:
> >
> > authoritative;
> > ddns-update-style none;
> > option domain-name-servers x.x.x.x x.x.x.x;
> > default-lease-time 604800;
> >
> > Do I need to define these in my "anotherconfig" conf file? Or will it
> inherit the global
> > directives by design?
> >
> > TIA!
>
>
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