Bug 1445628

Summary: IPaddr2 ipv6 nic selection is not as smart as ipv4
Product: Red Hat Enterprise Linux 7 Reporter: Michele Baldessari <michele>
Component: resource-agentsAssignee: Oyvind Albrigtsen <oalbrigt>
Status: CLOSED ERRATA QA Contact: Ofer Blaut <oblaut>
Severity: medium Docs Contact: Steven J. Levine <slevine>
Priority: medium    
Version: 7.3CC: agk, chjones, cluster-maint, fdinitto, mcornea, mnovacek, oalbrigt, slevine, tbarron
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: resource-agents-3.9.5-106.el7 Doc Type: Bug Fix
Doc Text:
`IPaddr2` resource agent now finds NIC for IPv6 addresses with 128 netmask Previously, the `IPaddr2` resource agent failed to find the NIC for IPv6 addresses with 128 netmask. This fix corrects that issue.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2018-04-10 12:07:57 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Michele Baldessari 2017-04-26 07:39:01 UTC 
Description of problem:
Given the following script:

[root@ctrl-r02-02 heartbeat]# more test.sh
#!/bin/bash
source ocf-shellfuncs
source findif.sh

OCF_RESKEY_ip="fd00:fd00:fd00:2000::7"
unset OCF_RESKEY_cidr_netmask
echo "IP: $OCF_RESKEY_ip - MASK: $OCF_RESKEY_cidr_netmask"
findif

OCF_RESKEY_ip="fd00:fd00:fd00:2000::7"
OCF_RESKEY_cidr_netmask="128"
echo "IP: $OCF_RESKEY_ip - MASK: $OCF_RESKEY_cidr_netmask"
findif

OCF_RESKEY_ip="172.16.17.222"
unset OCF_RESKEY_cidr_netmask
echo "IP: $OCF_RESKEY_ip - MASK: $OCF_RESKEY_cidr_netmask"
findif

OCF_RESKEY_ip="172.16.17.222"
OCF_RESKEY_cidr_netmask="32"
echo "IP: $OCF_RESKEY_ip - MASK: $OCF_RESKEY_cidr_netmask"
findif


Here is the output:
[root@ctrl-r02-02 heartbeat]# ./test.sh
IP: fd00:fd00:fd00:2000::7 - MASK:
vlan200 netmask 64 broadcast
IP: fd00:fd00:fd00:2000::7 - MASK: 128
ocf-exit-reason:Unable to find nic, or netmask mismatch.
IP: 172.16.17.222 - MASK:
eth4 netmask 25 broadcast 172.16.17.255
IP: 172.16.17.222 - MASK: 32
eth4 netmask 32 broadcast 172.16.17.255

Ideally, when we specify a mask of 128, the RA should be able to find the nic by itself just like it does for IPv4.

he reason for this is that:
a) In some situations knowing the nic beforehand is not ideal (*cough*)
b) The nic name does not necessarily have to be the same on all nodes

Version-Release number of selected component (if applicable):
resource-agents-3.9.5-82.el7_3.9.x86_64

Additional info:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:8a:2e:e6 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.12/25 brd 192.168.0.127 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fe8a:2ee6/64 scope link
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP qlen 1000
    link/ether 52:54:00:81:b4:d7 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:fe81:b4d7/64 scope link
       valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP qlen 1000
    link/ether 52:54:00:3f:02:f2 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:fe3f:2f2/64 scope link
       valid_lft forever preferred_lft forever
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP qlen 1000
    link/ether 52:54:00:ae:df:59 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:feae:df59/64 scope link
       valid_lft forever preferred_lft forever
6: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:ae:80:c0 brd ff:ff:ff:ff:ff:ff
    inet 172.16.17.222/25 brd 172.16.17.255 scope global eth4
       valid_lft forever preferred_lft forever
    inet6 2001:db8:ca2:3:5054:ff:feae:80c0/64 scope global mngtmpaddr dynamic
       valid_lft 3598sec preferred_lft 3598sec
    inet6 fe80::5054:ff:feae:80c0/64 scope link
       valid_lft forever preferred_lft forever
7: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 26:1f:22:80:b3:92 brd ff:ff:ff:ff:ff:ff
8: br-infra: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 52:54:00:3f:02:f2 brd ff:ff:ff:ff:ff:ff
    inet 10.0.1.132/25 brd 10.0.1.255 scope global br-infra
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fe3f:2f2/64 scope link
       valid_lft forever preferred_lft forever
9: br-storage: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 52:54:00:ae:df:59 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:feae:df59/64 scope link
       valid_lft forever preferred_lft forever
10: br-ex: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 52:54:00:81:b4:d7 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:fe81:b4d7/64 scope link
       valid_lft forever preferred_lft forever
11: vlan200: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether aa:e1:e7:32:da:a9 brd ff:ff:ff:ff:ff:ff
    inet6 fd00:fd00:fd00:2000::7/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fd00:fd00:fd00:2000::22/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::a8e1:e7ff:fe32:daa9/64 scope link
       valid_lft forever preferred_lft forever
12: vlan301: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 36:aa:2b:fc:16:91 brd ff:ff:ff:ff:ff:ff
    inet6 fd00:fd00:fd00:4000::5/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fd00:fd00:fd00:4000::22/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::34aa:2bff:fefc:1691/64 scope link
       valid_lft forever preferred_lft forever
13: vlan300: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 9a:16:13:f8:55:63 brd ff:ff:ff:ff:ff:ff
    inet6 fd00:fd00:fd00:3000::22/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::9816:13ff:fef8:5563/64 scope link
       valid_lft forever preferred_lft forever
14: vlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
    link/ether 8e:e2:a7:b4:cd:3c brd ff:ff:ff:ff:ff:ff
    inet6 2001:db8:ca2:4::22/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::8ce2:a7ff:feb4:cd3c/64 scope link
       valid_lft forever preferred_lft forever
Comment 3 Oyvind Albrigtsen 2017-09-15 09:45:48 UTC 
https://github.com/ClusterLabs/resource-agents/pull/1035
Comment 7 errata-xmlrpc 2018-04-10 12:07:57 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0757