[ClusterLabs] EL6, cman, rrp, unicast and iptables
Digimer
lists at alteeve.ca
Fri Sep 11 17:42:38 UTC 2015
Hi all,
Starting a new thread from the "Clustered LVM with iptables issue"
thread...
I've decided to review how I do networking entirely in my cluster. I
make zero claims to being great at networks, so I would love some feedback.
I've got three active/passive bonded interfaces; Back-Channel, Storage
and Internet-Facing networks. The IFN is "off limits" to the cluster as
it is dedicated to hosted server traffic only.
So before, I uses only the BCN for cluster traffic for cman/corosync
multicast traffic, no rrp. A couple months ago, I had a cluster
partition when VM live migration (also on the BCN) congested the
network. So I decided to enable RRP using the SN as backup, which has
been marginally successful.
Now, I want to switch to unicast (<cman transport="udpu"), RRP with
the SN as the backup and BCN as the primary ring and do a proper
IPTables firewall. Is this sane?
When I stopped iptables entirely and started cman with unicast + RRP,
I saw this:
====] Node 1
Sep 11 17:31:24 node1 kernel: DLM (built Aug 10 2015 09:45:36) installed
Sep 11 17:31:24 node1 corosync[2523]: [MAIN ] Corosync Cluster Engine
('1.4.7'): started and ready to provide service.
Sep 11 17:31:24 node1 corosync[2523]: [MAIN ] Corosync built-in
features: nss dbus rdma snmp
Sep 11 17:31:24 node1 corosync[2523]: [MAIN ] Successfully read
config from /etc/cluster/cluster.conf
Sep 11 17:31:24 node1 corosync[2523]: [MAIN ] Successfully parsed
cman config
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] Initializing transport
(UDP/IP Unicast).
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] Initializing
transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] Initializing transport
(UDP/IP Unicast).
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] Initializing
transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] The network interface
[10.20.10.1] is now up.
Sep 11 17:31:24 node1 corosync[2523]: [QUORUM] Using quorum provider
quorum_cman
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync cluster quorum service v0.1
Sep 11 17:31:24 node1 corosync[2523]: [CMAN ] CMAN 3.0.12.1 (built
Jul 6 2015 05:30:35) started
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync CMAN membership service 2.90
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
openais checkpoint service B.01.01
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync extended virtual synchrony service
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync configuration service
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync cluster closed process group service v1.01
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync cluster config database access v1.01
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync profile loading service
Sep 11 17:31:24 node1 corosync[2523]: [QUORUM] Using quorum provider
quorum_cman
Sep 11 17:31:24 node1 corosync[2523]: [SERV ] Service engine loaded:
corosync cluster quorum service v0.1
Sep 11 17:31:24 node1 corosync[2523]: [MAIN ] Compatibility mode set
to whitetank. Using V1 and V2 of the synchronization engine.
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] adding new UDPU member
{10.20.10.1}
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] adding new UDPU member
{10.20.10.2}
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] The network interface
[10.10.10.1] is now up.
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] adding new UDPU member
{10.10.10.1}
Sep 11 17:31:24 node1 corosync[2523]: [TOTEM ] adding new UDPU member
{10.10.10.2}
Sep 11 17:31:27 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 1 iface 10.10.10.1 to [1 of 3]
Sep 11 17:31:27 node1 corosync[2523]: [TOTEM ] A processor joined or
left the membership and a new membership was formed.
Sep 11 17:31:27 node1 corosync[2523]: [CMAN ] quorum regained,
resuming activity
Sep 11 17:31:27 node1 corosync[2523]: [QUORUM] This node is within the
primary component and will provide service.
Sep 11 17:31:27 node1 corosync[2523]: [QUORUM] Members[1]: 1
Sep 11 17:31:27 node1 corosync[2523]: [QUORUM] Members[1]: 1
Sep 11 17:31:27 node1 corosync[2523]: [CPG ] chosen downlist: sender
r(0) ip(10.20.10.1) r(1) ip(10.10.10.1) ; members(old:0 left:0)
Sep 11 17:31:27 node1 corosync[2523]: [MAIN ] Completed service
synchronization, ready to provide service.
Sep 11 17:31:27 node1 corosync[2523]: [TOTEM ] A processor joined or
left the membership and a new membership was formed.
Sep 11 17:31:27 node1 corosync[2523]: [QUORUM] Members[2]: 1 2
Sep 11 17:31:27 node1 corosync[2523]: [QUORUM] Members[2]: 1 2
Sep 11 17:31:27 node1 corosync[2523]: [CPG ] chosen downlist: sender
r(0) ip(10.20.10.1) r(1) ip(10.10.10.1) ; members(old:1 left:0)
Sep 11 17:31:27 node1 corosync[2523]: [MAIN ] Completed service
synchronization, ready to provide service.
Sep 11 17:31:29 node1 corosync[2523]: [TOTEM ] ring 1 active with no
faults
Sep 11 17:31:29 node1 fenced[2678]: fenced 3.0.12.1 started
Sep 11 17:31:29 node1 dlm_controld[2691]: dlm_controld 3.0.12.1 started
Sep 11 17:31:30 node1 gfs_controld[2755]: gfs_controld 3.0.12.1 started
====
====] Node 2
Sep 11 17:31:23 node2 kernel: DLM (built Aug 10 2015 09:45:36) installed
Sep 11 17:31:23 node2 corosync[2271]: [MAIN ] Corosync Cluster Engine
('1.4.7'): started and ready to provide service.
Sep 11 17:31:23 node2 corosync[2271]: [MAIN ] Corosync built-in
features: nss dbus rdma snmp
Sep 11 17:31:23 node2 corosync[2271]: [MAIN ] Successfully read
config from /etc/cluster/cluster.conf
Sep 11 17:31:23 node2 corosync[2271]: [MAIN ] Successfully parsed
cman config
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] Initializing transport
(UDP/IP Unicast).
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] Initializing
transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] Initializing transport
(UDP/IP Unicast).
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] Initializing
transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] The network interface
[10.20.10.2] is now up.
Sep 11 17:31:23 node2 corosync[2271]: [QUORUM] Using quorum provider
quorum_cman
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync cluster quorum service v0.1
Sep 11 17:31:23 node2 corosync[2271]: [CMAN ] CMAN 3.0.12.1 (built
Jul 6 2015 05:30:35) started
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync CMAN membership service 2.90
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
openais checkpoint service B.01.01
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync extended virtual synchrony service
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync configuration service
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync cluster closed process group service v1.01
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync cluster config database access v1.01
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync profile loading service
Sep 11 17:31:23 node2 corosync[2271]: [QUORUM] Using quorum provider
quorum_cman
Sep 11 17:31:23 node2 corosync[2271]: [SERV ] Service engine loaded:
corosync cluster quorum service v0.1
Sep 11 17:31:23 node2 corosync[2271]: [MAIN ] Compatibility mode set
to whitetank. Using V1 and V2 of the synchronization engine.
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] adding new UDPU member
{10.20.10.1}
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] adding new UDPU member
{10.20.10.2}
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] The network interface
[10.10.10.2] is now up.
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] adding new UDPU member
{10.10.10.1}
Sep 11 17:31:23 node2 corosync[2271]: [TOTEM ] adding new UDPU member
{10.10.10.2}
Sep 11 17:31:26 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 1 iface 10.10.10.2 to [1 of 3]
Sep 11 17:31:26 node2 corosync[2271]: [TOTEM ] A processor joined or
left the membership and a new membership was formed.
Sep 11 17:31:26 node2 corosync[2271]: [CMAN ] quorum regained,
resuming activity
Sep 11 17:31:26 node2 corosync[2271]: [QUORUM] This node is within the
primary component and will provide service.
Sep 11 17:31:26 node2 corosync[2271]: [QUORUM] Members[1]: 2
Sep 11 17:31:26 node2 corosync[2271]: [QUORUM] Members[1]: 2
Sep 11 17:31:26 node2 corosync[2271]: [CPG ] chosen downlist: sender
r(0) ip(10.20.10.2) r(1) ip(10.10.10.2) ; members(old:0 left:0)
Sep 11 17:31:26 node2 corosync[2271]: [MAIN ] Completed service
synchronization, ready to provide service.
Sep 11 17:31:27 node2 corosync[2271]: [TOTEM ] A processor joined or
left the membership and a new membership was formed.
Sep 11 17:31:27 node2 corosync[2271]: [QUORUM] Members[2]: 1 2
Sep 11 17:31:27 node2 corosync[2271]: [QUORUM] Members[2]: 1 2
Sep 11 17:31:27 node2 corosync[2271]: [CPG ] chosen downlist: sender
r(0) ip(10.20.10.1) r(1) ip(10.10.10.1) ; members(old:1 left:0)
Sep 11 17:31:27 node2 corosync[2271]: [MAIN ] Completed service
synchronization, ready to provide service.
Sep 11 17:31:28 node2 corosync[2271]: [TOTEM ] ring 1 active with no
faults
Sep 11 17:31:28 node2 fenced[2359]: fenced 3.0.12.1 started
Sep 11 17:31:28 node2 dlm_controld[2390]: dlm_controld 3.0.12.1 started
Sep 11 17:31:29 node2 gfs_controld[2442]: gfs_controld 3.0.12.1 started
====
This looked good to me. So I wanted to test RRP by ifdown'ing bcn_bond1
on node 1 only, leaving bcn_bond1 up on node2. The cluster survived and
seemed to the SN, but I saw this error repeatedly printed;
====] Node 1
Sep 11 17:31:46 node1 kernel: bcn_bond1: Removing slave bcn_link1
Sep 11 17:31:46 node1 kernel: bcn_bond1: Releasing active interface
bcn_link1
Sep 11 17:31:46 node1 kernel: bcn_bond1: the permanent HWaddr of
bcn_link1 - 52:54:00:b0:e4:c8 - is still in use by bcn_bond1 - set the
HWaddr of bcn_link1 to a different address to avoid conflicts
Sep 11 17:31:46 node1 kernel: bcn_bond1: making interface bcn_link2 the
new active one
Sep 11 17:31:46 node1 kernel: ICMPv6 NA: someone advertises our address
fe80:0000:0000:0000:5054:00ff:feb0:e4c8 on bcn_link1!
Sep 11 17:31:46 node1 kernel: bcn_bond1: Removing slave bcn_link2
Sep 11 17:31:46 node1 kernel: bcn_bond1: Releasing active interface
bcn_link2
Sep 11 17:31:48 node1 ntpd[2037]: Deleting interface #7 bcn_link1,
fe80::5054:ff:feb0:e4c8#123, interface stats: received=0, sent=0,
dropped=0, active_time=48987 secs
Sep 11 17:31:48 node1 ntpd[2037]: Deleting interface #6 bcn_bond1,
fe80::5054:ff:feb0:e4c8#123, interface stats: received=0, sent=0,
dropped=0, active_time=48987 secs
Sep 11 17:31:48 node1 ntpd[2037]: Deleting interface #3 bcn_bond1,
10.20.10.1#123, interface stats: received=0, sent=0, dropped=0,
active_time=48987 secs
Sep 11 17:31:51 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 677 iface 10.20.10.1 to [1 of 3]
Sep 11 17:31:53 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:31:57 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 679 iface 10.20.10.1 to [1 of 3]
Sep 11 17:31:59 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:04 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 681 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:06 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:11 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 683 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:13 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:17 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 685 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:19 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:24 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 687 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:26 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:31 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 689 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:33 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:37 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 691 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:39 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:44 node1 corosync[2523]: [TOTEM ] Incrementing problem
counter for seqid 693 iface 10.20.10.1 to [1 of 3]
Sep 11 17:32:46 node1 corosync[2523]: [TOTEM ] ring 0 active with no
faults
====
====] Node 2
Sep 11 17:31:48 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 676 iface 10.20.10.2 to [1 of 3]
Sep 11 17:31:50 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:31:54 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 678 iface 10.20.10.2 to [1 of 3]
Sep 11 17:31:56 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:01 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 680 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:03 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:08 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 682 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:10 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:14 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 684 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:16 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:21 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 686 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:23 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:28 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 688 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:30 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:35 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 690 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:37 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:41 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 692 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:43 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
Sep 11 17:32:48 node2 corosync[2271]: [TOTEM ] Incrementing problem
counter for seqid 694 iface 10.20.10.2 to [1 of 3]
Sep 11 17:32:50 node2 corosync[2271]: [TOTEM ] ring 0 active with no
faults
====
When I ifup'ed bcn_bond1 on node1, the messages stopped printing. So
before I even start on iptables, I am curious if I am doing something
incorrect here.
Advice?
Thanks!
--
Digimer
Papers and Projects: https://alteeve.ca/w/
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