Re: [ceph-users] ceph cluster_network with linklocal ipv6
On 08/18/2015 03:39 PM, Björn Lässig wrote:
For not having any dependencies in my cluster network, i want to use
only ipv6 link-local addresses on interface 'cephnet'.
cluster_network = fe80::%cephnet/64
RFC4007 11.7
The IPv6 addressing architecture [1] also defines the syntax of IPv6
prefixes. If the address portion of a prefix is non-global and its
scope zone should be disambiguated, the address portion SHOULD be in
the format. For example, a link-local prefix fe80::/64 on the second
link can be represented as follows:
fe80::%2/64
In this combination, it is important to place the zone index portion
before the prefix length when we consider parsing the format by a
name-to-address library function [11]. That is, we can first
separate the address with the zone index from the prefix length, and
just pass the former to the library function.
so my original format would be the correct one.
just looked into the code ... and this is exactly what happens in:
src/common/ipaddr.cc: bool parse_network(const char *s, […]) {
it looks where a '/' is and try to cast everything after to a longint.
Everything before the '/' is thrown into inet_pton
ok = inet_pton(AF_INET6, addr, ((struct sockaddr_in6*)network)-sin6_addr);
and inet_pton6 from glibc does not look at '%'.
No chance, this code could work with an interfacename after or before
the '/'
I'm using addresses with global scope now.
Björn
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Re: [ceph-users] ceph cluster_network with linklocal ipv6
Should ceph care about what scope the address is in? We don't specify it for ipv4 anyway, or is link-scope special in some way? And isn't this the correct syntax actually? cluster_network = fe80::/64%cephnet On 18 Aug 2015, at 16:17, Wido den Hollander w...@42on.com wrote: On 18-08-15 16:02, Jan Schermer wrote: Shouldn't this: cluster_network = fe80::%cephnet/64 be this: cluster_network = fe80::/64 ? That won't work since the kernel doesn't know the scope. So %devname is right, but Ceph can't parse it. Although it sounds cool to run Ceph over link-local I don't think it currently works. Wido On 18 Aug 2015, at 15:39, Björn Lässig b.laes...@pengutronix.de wrote: Hi, i just setup my first ceph cluster and after breaking things for a while and let ceph repair itself, i want to setup the cluster network. Unfortunately i am doing something wrong :-) For not having any dependencies in my cluster network, i want to use only ipv6 link-local addresses on interface 'cephnet'. /var/log/ceph/ceph-osd.4.log:2015-08-18 15:10:38.954592 7f24c0ac2880 -1 unable to parse network: fe80::%cephnet/64 --- /etc/ceph/ceph.conf [global] ... cluster_network = fe80::%cephnet/64 --- /etc/network/interfaces auto cephnet iface cephnet inet6 auto sysctl -wq net.ipv6.conf.$IFACE.accept_ra_defrtr=0 What could i do? thanks, Björn ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] ceph cluster_network with linklocal ipv6
Op 18 aug. 2015 om 18:15 heeft Jan Schermer j...@schermer.cz het volgende geschreven: On 18 Aug 2015, at 17:57, Björn Lässig b.laes...@pengutronix.de wrote: On 08/18/2015 04:32 PM, Jan Schermer wrote: Should ceph care about what scope the address is in? We don't specify it for ipv4 anyway, or is link-scope special in some way? fe80::/64 is on every ipv6 enabled interface ... thats different from legacy ip. I'm not a network guru, but you can have same/overlapping subnets with IPv4 as well that's why you have scopes, metrics, routing tables, policy routing tables etc. That's why I'm wondering what's different here. It's IPv6, that's different. Search for link local, it will tell you what it is. Wido And isn't this the correct syntax actually? cluster_network = fe80::/64%cephnet That is a very good question! I will look into it. Björn ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] ceph cluster_network with linklocal ipv6
On 18 Aug 2015, at 17:57, Björn Lässig b.laes...@pengutronix.de wrote: On 08/18/2015 04:32 PM, Jan Schermer wrote: Should ceph care about what scope the address is in? We don't specify it for ipv4 anyway, or is link-scope special in some way? fe80::/64 is on every ipv6 enabled interface ... thats different from legacy ip. I'm not a network guru, but you can have same/overlapping subnets with IPv4 as well that's why you have scopes, metrics, routing tables, policy routing tables etc. That's why I'm wondering what's different here. And isn't this the correct syntax actually? cluster_network = fe80::/64%cephnet That is a very good question! I will look into it. Björn ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] ceph cluster_network with linklocal ipv6
On 08/18/2015 04:32 PM, Jan Schermer wrote: Should ceph care about what scope the address is in? We don't specify it for ipv4 anyway, or is link-scope special in some way? fe80::/64 is on every ipv6 enabled interface ... thats different from legacy ip. And isn't this the correct syntax actually? cluster_network = fe80::/64%cephnet That is a very good question! I will look into it. Björn ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
