[Engine-devel] Gluster IPTable configuration

[Alon Bar-Lev]

----- Original Message -----
> From: "David Jaša" <djasa at redhat.com>
> To: engine-devel at ovirt.org
> Sent: Friday, August 31, 2012 11:57:11 AM
> Subject: Re: [Engine-devel] Gluster IPTable configuration
> 
> Alon Bar-Lev píše v Čt 30. 08. 2012 v 14:40 -0400:
> > 
> > ----- Original Message -----
> > > From: "Andrew Cathrow" <acathrow at redhat.com>
> > > To: "Alon Bar-Lev" <alonbl at redhat.com>
> > > Cc: "Shireesh Anjal" <sanjal at redhat.com>, engine-devel at ovirt.org,
> > > "Selvasundaram" <sesubram at redhat.com>
> > > Sent: Thursday, August 30, 2012 9:37:59 PM
> > > Subject: Re: [Engine-devel] Gluster IPTable configuration
> > > 
> > > 
> > > 
> > > ----- Original Message -----
> > > > From: "Alon Bar-Lev" <alonbl at redhat.com>
> > > > To: "Selvasundaram" <sesubram at redhat.com>
> > > > Cc: "Shireesh Anjal" <sanjal at redhat.com>,
> > > > engine-devel at ovirt.org
> > > > Sent: Thursday, August 30, 2012 2:35:16 PM
> > > > Subject: Re: [Engine-devel] Gluster IPTable configuration
> > > > 
> > > > 
> > > > 
> > > > ----- Original Message -----
> > > > > From: "Selvasundaram" <sesubram at redhat.com>
> > > > > To: engine-devel at ovirt.org
> > > > > Cc: "Shireesh Anjal" <sanjal at redhat.com>
> > > > > Sent: Thursday, August 30, 2012 4:30:16 PM
> > > > > Subject: [Engine-devel] Gluster IPTable configuration
> > > > > 
> > > > > 
> > > > > Hi,
> > > > > 
> > > > > I want to add gluster specific IPTable configuration in
> > > > > addition
> > > > > to
> > > > > the ovirt IPTable configuration (if it is gluster node).
> > > > > 
> > > > > There are two approaches,
> > > > > 1. Having one more gluster specific IP table config in db and
> > > > > merge
> > > > > with ovirt IPTable config (merging NOT appending)
> > > > > [I have the patch engine: Gluster specific firewall
> > > > > configurations
> > > > > #7244]
> > > > > 2. Having two different IP Table config (ovirt and
> > > > > ovirt+gluster)
> > > > > and
> > > > > use either one.
> > > > > 
> > > > > Please provide your suggestions or improvements on this.
> > > > > 
> > > > 
> > > > Hello all,
> > > > 
> > > > The mentioned patch[1], adds hard coded gluster code into the
> > > > bootstrap code, manipulate the firewall configuration to be
> > > > gluster
> > > > specific. It hardcoded search for "reject", insert before some
> > > > other
> > > > rules.
> > > > 
> > > > I believe this hardcode approach is obsolete now that we have
> > > > proper
> > > > tools for templates.
> > > > 
> > > > A more robust solution would be defining generic profiles, each
> > > > profile as a template, each template can refer to different
> > > > profiles, and assign profile to a node.
> > > > 
> > > > This way the implementation is not gluster [or any] specific
> > > > and
> > > > can
> > > > be reused for more setups, code is cleaner.
> > > 
> > > 
> > > or create custom chains ?
> > 
> > Can you please elaborate what is custom chains?
> > Thanks!
> 
> iptables -N my_new_chain
> iptables -A my_new_chain <rule_1>
> iptables -A my_new_chain ...
> iptables -A my_new_chain <rule_n>
> 
> # if this <rule> is matched, packet goes through rules in
> my_new_chain
> iptables -A INPUT <rule> -j my_new_chain
> 

Hello,

How does this solve the original issue?
The need to provide different rules to different hosts by software installed on destination?

Standard host needs iptables X.
Gluster host needs iptables X+Y.
XXX host needs iptables X+Z.
Maintainer of Gluster knows what Y is.
Maintainer of XXX knows what Z is.

If we merge all to one entry product comes with default X.
User override X to A.
New version of product comes with default Y.
Upgrade options:
1. System continues to use A.
2. Some AI to upgrade and create A'.
3. Revert to Y, dropping user's customization.

Or we can maintain one large table with complete configuration and conditionals.

Alon.