On 14/09/15 04:20 AM, Jan Friesse wrote:
> Digimer napsal(a):
>> 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?
>
> Don't do ifdown. Corosync reacts on ifdown very badly (long time known
> issue, also it's one of the reason for knet in future version).
Is knet in the future "official" now? I know it's been talked about for
a while (and I am hopeful that does become the case).
> Also rrp active is not so well tested as passive, so give a try to passive.
>
> Honza
Ah, the 'don't ifdown' now rings a bell. So OK, I'll use iptables to
drop all traffic instead. Also, I will switch to passive.
--
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?
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