On 09/06/2015 09:01 PM, Kaushal M wrote:
After more investigation and further discussions (sorry these happened
internally), what I've found is that there is no way currently to
dynamically change a firewalld service in runtime without side
effects. I'll be opening an RFE for this with firewalld, and see where
it goes.
What are these side-effects?
For now, our best option is to open up a range of ports statically in
our service file. This isn't the best solution, but I've seen some
other applications doing the same. This also avoids some selinux
issues we saw during our tests. If no one has any objections to this
we can proceed with this.
~kaushal
On Mon, Sep 7, 2015 at 9:25 AM, Kaushal M <kshlmster@xxxxxxxxx> wrote:
On Fri, Sep 4, 2015 at 7:44 PM, Joe Julian <joe@xxxxxxxxxxxxxxxx> wrote:
As an upstream admin, one of the things I abhor about debian/ubuntu is how
services are enabled upon installation. I sure hope Fedora/EL doesn't follow
their broken example.
Can we enable the static firewall rule in glusterd.service?
Joe,
The services we are talking about are firewalld services, not systemd
services. A firewalld service is a collection of firewall rules for an
application, which the application can ship with it. The admin is free
to enable/disable these services on the networks they want (not
directly, but through firewalld zones). A firewalld service cannot be
enabled automatically, and requires admin to do it. I hope this
answers your question.
~kaushal
On September 4, 2015 6:37:15 AM PDT, Christopher Blum <cblum@xxxxxxxxxx>
wrote:
Wasn't the idea behind this all that we have the necessary firewall rules
active by default? Why would an admin install Gluster, but NOT allow it to
work?
Do you know if we will have the service pre-enabled after the install of
RHGS3.1.1?
Christopher Blum
Associate Storage Consultant
Global Storage Consulting, Red Hat
+49 711 96 43 7009
On Fri, Sep 4, 2015 at 2:05 PM, Anand Nekkunti <anekkunt@xxxxxxxxxx>
wrote:
On 09/04/2015 05:20 PM, Christopher Blum wrote:
Where do you add the services to the zone? I couldn't find that in your
code...
By default it is not attached to any zone, admin has to enable
glusterfs-static service to his/her active zone after installation.
Christopher Blum
Associate Storage Consultant
Global Storage Consulting, Red Hat
+49 711 96 43 7009
On Fri, Sep 4, 2015 at 5:37 AM, Anand Nekkunti <anekkunt@xxxxxxxxxx>
wrote:
see comments below
On 09/01/2015 02:47 PM, Anand Nekkunti wrote:
Hi All
From firewalld doc and my experiments , I understood that we don't have
any option to add/remove port to/from service runtime/permanent (this can
double for zone) . The only way is modifying service xml file but it
requires firewall reload (which cause the loosing run time settings).
Is there any way to reload firewall without loosing run time
settings or is there any way to reload particular service.
Regards
Anand.N
On 09/01/2015 12:49 PM, Christopher Blum wrote:
There is a function in the d-bus interface:
getZoneOfInterface(s: interface) → s
that will return the current zone of the interface and you can then add
ports to that interface.
As far as I see it, the hooks get only executed when I start the volume,
right? So when I created and started the volume, but then change the zone of
the interface, we need to detect that (I guess it would be enough to handle
that on reboot) and move the ports/services to the new zone.
Regarding Org.fedoraproject.firewalld1.config.service - I think that
would need additional tests if that is really only for the persistent
config, or if the changes are also applied in the running config.
Christopher Blum
Associate Storage Consultant
Global Storage Consulting, Red Hat
+49 711 96 43 7009
On Tue, Sep 1, 2015 at 8:58 AM, Kaushal M <kshlmster@xxxxxxxxx> wrote:
On Mon, Aug 31, 2015 at 5:15 PM, Kaushal M <kshlmster@xxxxxxxxx> wrote:
Hi all,
I wanted know if there is any existing information on how to manage
dynamically changing services using firewalld. If there are none
existing, could you please let us know if the approach we're
following
below is correct.
We want to provide firewalld service configuration for GlusterFS. One
of the properties of GlusterFS is that it has a set of fixed ports,
and a set of dynamic ports, which need to be opened.
We propose to ship 2 firewalld services with GlusterFS.
- glusterfs-static - This contains the list of static ports that
should be opened up. This is placed in /usr/lib/firewalld/services
- glusterfs-dynamic - This will contain the list of dynamic ports.
This will be shipped empty, and be placed in /etc/firewalld/services
.
The ports in this service will be kept updated by a couple of
scripts,
which hook into the glusterfs start/stop events.
The scripts, add or remove ports from the glusterfs-dyanmic.xml file,
and call `firewall-cmd --reload` to have firewalld reload
configuration. We do it this way, instead of using a dbus call
because
we want the configuration to be persisted, and also applied live.
We've tested this, and this works. But we'd like to validate this
solution with you guys.
Do you see any issues with our approach? Is there anything we could
do
to improve the solution.
For reference, the glusterfs bug and proposed solution are available
at [1] and [2].
Thanks.
Kaushal
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1253967
[2] http://review.gluster.org/11989
PS: Apologies if I should have posted this to the users list instead.
I've had a private conversation with Christopher Blum (CCd), who
identified a major flaw with our current solution. Having firewalld
reload will cause any runtime rules that were set to be lost. This
should be avoided at all costs.
Chris suggested using firewalld dbus commands [1] which could solve
this. We have dbus commands to add/remove ports from a service
permanently. This is an alternative to updating the service xml files.
But we don't see a method to update a service during runtime.
There are dbus commands to add/remove ports to zones during runtime.
But this is not useful as we wouldn't know which zone to apply it to.
One of the reasons we chose to use services was this.
So now we have two questions,
1. Is there a way to do a runtime modification of a firewalld service
it seems firewalld not supporting for run time service
update, but we can add and remove ports
from zone
2. If not, is there a easy way to get active zones, which have our
services enabled and add/remove ports from them.
we can get the services which are enabled in zone using below
command
firewall-cmd --zone=$zone --list-services
I have updated hook script in my patch[1] , it identify the
zones which have gluster services enabled and it add/remove the port in
zone(s) so that we can avoid
firewall reload. I have tested this script with different
test cases
[1].http://review.gluster.org/#/c/11989/
Thanks.
Kaushal
[1] https://www.mankier.com/5/firewalld.dbus
[2]
https://www.mankier.com/5/firewalld.dbus#Interfaces-Org.fedoraproject.firewalld1.config.service
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