Bug 1311046
| Summary: | dhclient process is created for dev even dev is added into bridge | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jianlin Shi <jishi> |
| Component: | initscripts | Assignee: | initscripts Maintenance Team <initscripts-maint-list> |
| Status: | CLOSED WONTFIX | QA Contact: | qe-baseos-daemons |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.8 | CC: | deekej, jishi, kdudka |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-11-09 17:36:10 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: | |||
normal on rhel-6.7GA
[root@ibm-x3650m4-09 test]# uname -a
Linux ibm-x3650m4-09.rhts.eng.pek2.redhat.com 2.6.32-573.el6.x86_64 #1 SMP Wed Jul 1 18:23:37 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@ibm-x3650m4-09 test]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.7 (Santiago)
After run reproducer:
[root@ibm-x3650m4-09 test]# ip addr sh up
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 8c:7c:ff:2e:14:00 brd ff:ff:ff:ff:ff:ff
6: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 6c:ae:8b:38:aa:f2 brd ff:ff:ff:ff:ff:ff
14: br_wan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether 6c:ae:8b:38:aa:f2 brd ff:ff:ff:ff:ff:ff
inet 10.73.130.107/23 brd 10.73.131.255 scope global br_wan
inet6 2620:52:0:4982:6eae:8bff:fe38:aaf2/64 scope global dynamic
valid_lft 2591961sec preferred_lft 604761sec
inet6 fe80::fc1c:51ff:feb5:47f/64 scope link
valid_lft forever preferred_lft forever
[root@ibm-x3650m4-09 test]# ps aux | grep dhclient
root 8622 0.0 0.0 9120 808 ? Ss 16:33 0:00 dhclient br_wan
root 8784 0.0 0.0 103320 928 pts/0 S+ 17:14 0:00 grep dhclient
[root@ibm-x3650m4-09 test]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.73.130.0 0.0.0.0 255.255.254.0 U 0 0 0 br_wan
0.0.0.0 10.73.131.254 0.0.0.0 UG 0 0 0 br_wan
Can you attach here your ifcfg files? And if you have some ifcfg file related to the bridge interface, can you try adding there HOTPLUG=no? (In reply to Lukáš Nykrýn from comment #3) > Can you attach here your ifcfg files? And if you have some ifcfg file > related to the bridge interface, can you try adding there HOTPLUG=no? [root@hp-dl380pg8-16 ~]# cat ifcfg-eth2 DEVICE="eth2" BOOTPROTO="dhcp" HWADDR="28:80:23:9D:46:9C" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet" UUID="370aa1fd-eb80-4369-8fa6-076626969775" There is no ifcfg file for bridge, we added the bridge with ip manually. After added HOTPLUG=no, the new dhclient process wasn't created any more. This is yet another race with hotplug. The wrkaround is to eput HOPLUG not to sysconfig/network of the ifcfg files. Not a blocker for 6.8 It has been decided that race condition with HOTPLUG will not be fixed for RHEL-6. For more info, please refer to BZ #855107. |
Description of problem: dhclient process is created for dev even dev is added into bridge, which make the network of bridge unreachable Version-Release number of selected component (if applicable): distro: RHEL6.8-20160212.2 initscripts-9.03.50-1.el6.x86_64 How reproducible: Almost always with reproducer Steps to Reproduce: #!/bin/bash nic_bkr=eth2 br_bkr=br_wan nic_test=eth0 pkill dhclient brctl delif $br_bkr $nic_bkr && sleep 2 && dhclient $nic_bkr ip addr flush dev $br_bkr ip link set $br_bkr down brctl delbr $br_bkr service NetworkManager stop iptables -F ip6tables -F setenforce 0 # prepare bridge shared by beaker and vm pkill dhclient sleep 2 brctl addbr $br_bkr ip link set $br_bkr up brctl addif $br_bkr $nic_bkr && dhclient $br_bkr ip addr flush dev $nic_bkr ip link set $nic_test up ip addr flush dev $nic_test brctl show ip addr list up Actual results: network of bridge(br_wan) becomes unreachable Expected results: network of bridge can be reached Additional info: [root@hp-dl380pg8-16 test]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.8 Beta (Santiago) [root@hp-dl380pg8-16 test]# uname -a Linux hp-dl380pg8-16.rhts.eng.pek2.redhat.com 2.6.32-614.el6.x86_64 #1 SMP Mon Feb 8 23:43:40 EST 2016 x86_64 x86_64 x86_64 GNU/Linux after run reproducer: [root@hp-dl380pg8-16 test]# ip addr sh up ip addr sh up 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 90:e2:ba:29:c0:ac brd ff:ff:ff:ff:ff:ff 6: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 28:80:23:9d:46:9c brd ff:ff:ff:ff:ff:ff inet 10.73.130.101/23 brd 10.73.131.255 scope global eth2 36: br_wan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether 28:80:23:9d:46:9c brd ff:ff:ff:ff:ff:ff inet 10.73.130.101/23 brd 10.73.131.255 scope global br_wan inet6 2620:52:0:4982:2a80:23ff:fe9d:469c/64 scope global dynamic valid_lft 2591940sec preferred_lft 604740sec inet6 fe80::38ef:7eff:fe11:ae9/64 scope link valid_lft forever preferred_lft forever [root@hp-dl380pg8-16 test]# brctl show brctl show bridge name bridge id STP enabled interfaces br_wan 8000.2880239d469c no eth2 <============eth2 is in bridge br_wan [root@hp-dl380pg8-16 test]# ps aux | grep dhclient ps aux | grep dhclient root 42365 0.0 0.0 9124 800 ? Ss 17:08 0:00 dhclient br_wan root 42436 0.0 0.0 9124 728 ? S<s 17:08 0:00 /sbin/dhclient -H hp-dl380pg8-16 -1 -q -cf /etc/dhcp/dhclient-eth2.conf -lf /var/lib/dhclient/dhclient-eth2.leases -pf /var/run/dhclient-eth2.pid eth2 <==========dhclient process for eth2 is created root 42509 0.0 0.0 106028 868 ttyS1 S+ 17:09 0:00 grep dhclient [root@hp-dl380pg8-16 test]# route -n route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.73.130.0 0.0.0.0 255.255.254.0 U 0 0 0 br_wan 10.73.130.0 0.0.0.0 255.255.254.0 U 0 0 0 eth2 169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 eth2 0.0.0.0 10.73.131.254 0.0.0.0 UG 0 0 0 eth2 <===========route of eth2 is created. which makes br_wan unreachable .