Joe Smithian
2016-Jul-07 21:21 UTC
[CentOS] NetworkManger creates extra bonds; is this a bug?
Hi All, I see an unexpected beahviour from NetworkManager on CentOS 7.1. Using nmcli tool, I create a bond with two slaves as explained in the Red Hat 7.1 Networking guide. I enable slaves and master; bond works as expected. When I restart NetworkManager, it creates a new bond with the same name but not connected to any device. Two bonds with the same name is confusing for my other monitoring scripts. I'm wondering why a second bond is created? Is it a bug in NetworkManger? #Create a bond with two slaves nmcli con add autoconnect no type bond con-name bond0 ifname bond0 nmcli con mod bond0 ipv6.method ignore ipv4.method manual ipv4.addresses ${BOND_IP}/${BOND_CIDR} ${BOND_GW} ${BOND_DNS} ${BOND_DNS_SEARCH} ipv4.never-default no ipv4.ignore-auto-dns no nmcli con add autoconnect no type bond-slave con-name bond-slave-eth0 ifname eth0 master bond0 nmcli con add autoconnect no type bond-slave con-name bond-slave-eth1 ifname eth1 master bond0 #Enable bond nmcli con mod bond-slave-eth0 connection.autoconnect yes nmcli con up bond-slave-eth0 nmcli con mod bond-slave-eth1 connection.autoconnect yes nmcli con up bond-slave-eth1 nmcli con mod bond0 connection.autoconnect yes nmcli con up bond0 systemctl restart NetworkManager systemctl restart iptables nmcli con | grep bond bond0 9942bdc6-df72-4723-b2ed-47a78e3a5c59 bond bond0 bond-slave-eth0 8b0fbbe1-a7f0-448c-8005-46d11599f57a 802-3-ethernet eth0 bond-slave-eth1 333dd1b9-15a4-4119-8e42-55ac3621a85d 802-3-ethernet eth1 *bond0 460dd9e8-bc0b-473e-9c89-41facda98b66 bond -- # Why this extra bond connections has been created?* I'd appreciate your comments and suggestions to fix the issue. Thanks, Joe
On 07/07/16 05:21 PM, Joe Smithian wrote:> Hi All, > > I see an unexpected beahviour from NetworkManager on CentOS 7.1. > Using nmcli tool, I create a bond with two slaves as explained in the Red > Hat 7.1 Networking guide. I enable slaves and master; bond works as > expected. > When I restart NetworkManager, it creates a new bond with the same name but > not connected to any device. Two bonds with the same name is confusing for > my other monitoring scripts. > I'm wondering why a second bond is created? Is it a bug in NetworkManger? > > > #Create a bond with two slaves > nmcli con add autoconnect no type bond con-name bond0 ifname bond0 > nmcli con mod bond0 ipv6.method ignore ipv4.method manual ipv4.addresses > ${BOND_IP}/${BOND_CIDR} ${BOND_GW} ${BOND_DNS} ${BOND_DNS_SEARCH} > ipv4.never-default no ipv4.ignore-auto-dns no > nmcli con add autoconnect no type bond-slave con-name bond-slave-eth0 > ifname eth0 master bond0 > nmcli con add autoconnect no type bond-slave con-name bond-slave-eth1 > ifname eth1 master bond0 > > #Enable bond > nmcli con mod bond-slave-eth0 connection.autoconnect yes > nmcli con up bond-slave-eth0 > > nmcli con mod bond-slave-eth1 connection.autoconnect yes > nmcli con up bond-slave-eth1 > > nmcli con mod bond0 connection.autoconnect yes > nmcli con up bond0 > > systemctl restart NetworkManager > systemctl restart iptables > > nmcli con | grep bond > bond0 9942bdc6-df72-4723-b2ed-47a78e3a5c59 bond bond0 > bond-slave-eth0 8b0fbbe1-a7f0-448c-8005-46d11599f57a 802-3-ethernet eth0 > bond-slave-eth1 333dd1b9-15a4-4119-8e42-55ac3621a85d 802-3-ethernet eth1 > *bond0 460dd9e8-bc0b-473e-9c89-41facda98b66 bond > -- # Why this extra bond connections has been created?* > > > I'd appreciate your comments and suggestions to fix the issue. > > > Thanks, > > JoeTo this day, on EL6, creating bonds always generates a spurious 'bond0' interface with no slaved interfaces. It was reported to red hat bugzilla ages ago but the issue was closed without resolution (sorry, I've been looking for the rhbz# but haven't found it yet). digimer -- 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?
On 07/07/16 05:36 PM, Digimer wrote:> On 07/07/16 05:21 PM, Joe Smithian wrote: >> Hi All, >> >> I see an unexpected beahviour from NetworkManager on CentOS 7.1. >> Using nmcli tool, I create a bond with two slaves as explained in the Red >> Hat 7.1 Networking guide. I enable slaves and master; bond works as >> expected. >> When I restart NetworkManager, it creates a new bond with the same name but >> not connected to any device. Two bonds with the same name is confusing for >> my other monitoring scripts. >> I'm wondering why a second bond is created? Is it a bug in NetworkManger? >> >> >> #Create a bond with two slaves >> nmcli con add autoconnect no type bond con-name bond0 ifname bond0 >> nmcli con mod bond0 ipv6.method ignore ipv4.method manual ipv4.addresses >> ${BOND_IP}/${BOND_CIDR} ${BOND_GW} ${BOND_DNS} ${BOND_DNS_SEARCH} >> ipv4.never-default no ipv4.ignore-auto-dns no >> nmcli con add autoconnect no type bond-slave con-name bond-slave-eth0 >> ifname eth0 master bond0 >> nmcli con add autoconnect no type bond-slave con-name bond-slave-eth1 >> ifname eth1 master bond0 >> >> #Enable bond >> nmcli con mod bond-slave-eth0 connection.autoconnect yes >> nmcli con up bond-slave-eth0 >> >> nmcli con mod bond-slave-eth1 connection.autoconnect yes >> nmcli con up bond-slave-eth1 >> >> nmcli con mod bond0 connection.autoconnect yes >> nmcli con up bond0 >> >> systemctl restart NetworkManager >> systemctl restart iptables >> >> nmcli con | grep bond >> bond0 9942bdc6-df72-4723-b2ed-47a78e3a5c59 bond bond0 >> bond-slave-eth0 8b0fbbe1-a7f0-448c-8005-46d11599f57a 802-3-ethernet eth0 >> bond-slave-eth1 333dd1b9-15a4-4119-8e42-55ac3621a85d 802-3-ethernet eth1 >> *bond0 460dd9e8-bc0b-473e-9c89-41facda98b66 bond >> -- # Why this extra bond connections has been created?* >> >> >> I'd appreciate your comments and suggestions to fix the issue. >> >> >> Thanks, >> >> Joe > > To this day, on EL6, creating bonds always generates a spurious 'bond0' > interface with no slaved interfaces. It was reported to red hat bugzilla > ages ago but the issue was closed without resolution (sorry, I've been > looking for the rhbz# but haven't found it yet). > > digimerFound it: https://bugzilla.redhat.com/show_bug.cgi?id=1245440 ===Neil Horman 2015-07-22 14:30:57 EDT inserting the bonding module always creates the first bond interface, thats always how its been, and isn't a bug. Status: NEW ? CLOSED Resolution: --- ? NOTABUG Last Closed: 2015-07-22 14:30:57 === digimer -- 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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