I am new to openstack. I followed the initial openstack guild "OpenStack
Installation Guide for Red Hat Enterprise Linux and CentOS" with options 1
network. Everything else work well but failed in networking site. My vm
instance cannot get ip address from DHCP.
After further troubleshooting, I found that could be issues in DHCP Namespace.
I cannot ping from DHCP namespace to my gateway and compute node. DHCP is
located in control node. Looks like DHCP namespace cannot get tap interface
(tap2044baac-9c@if2) from control node and instead of creating itself
(ns-2044baac-9c@if5). My other team member also have the same issues as me in
his test environment. Any recommendation will be much appreciated.
[root@control1 ~]# ip addr
....
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master
brq469ef97c-8c state UP qlen 1000
link/ether 00:50:56:93:06:f5 brd ff:ff:ff:ff:ff:ff
inet6 fe80::250:56ff:fe93:6f5/64 scope link
valid_lft forever preferred_lft forever
5: tap2044baac-9c@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast master brq469ef97c-8c state UP qlen 1000
link/ether 62:73:3f:a8:d5:fd brd ff:ff:ff:ff:ff:ff link-netnsid 0
6: brq469ef97c-8c: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP
link/ether 00:50:56:93:06:f5 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.13/24 brd 192.168.1.255 scope global brq469ef97c-8c
valid_lft forever preferred_lft forever
...
[root@control1 ~]# ip netns exec qdhcp-469ef97c-8ccb-4b06-9faa-85b3b8a5fbbc ip a
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
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ns-2044baac-9c@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether fa:16:3e:67:4f:45 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 192.168.1.16/24 brd 192.168.1.255 scope global ns-2044baac-9c
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global ns-2044baac-9c
valid_lft forever preferred_lft forever
inet6 fe80::f816:3eff:fe67:4f45/64 scope link
valid_lft forever preferred_lft forever
Albert
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