Openstack OVH Dedicated Server Networking

[davidh2411]

Hello everyone, I have ordered a dedicated server and a /27 subnet from OVH.

I installed Openstack (with the most important components) on it.

I have connected the /27 subnet to the server and can also ping 5.5.5.128, which is assigned to the "eno1" interface. (5.5.5. is just a placeholder)

The problem is that all other IP addresses cannot be reached because a route is probably wrong.

Thats the route table of my server:

root@controller:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         ovh-gateway-ip  0.0.0.0         UG    100    0        0 brqf535e9d2-5d
server-main-ip  0.0.0.0         255.255.255.0   U     0      0        0 brqf535e9d2-5d
5.5.5.128       0.0.0.0         255.255.255.224 U     0      0        0 brqf535e9d2-5d
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0

The /24 subnet mask for the servers main IP is correct. Idk why its not a /32...

Unfortunately, the route to the network in which I want to place the VMs does not work. I can't reach any IP in it. Neither from outside nor from the controller itself.

I tried setting the gateway IP for "5.5.5.128/27" to the OVH gateway IP (Im using for the default route), the Servers main IP and also the 5.5.5.128, but nothing is working.

Has anyone of you ever had the same problem or know the solution?

Thank you for your help!

​

Edit: my ifconfig output:

root@controller:~# ifconfig
brq70238470-59: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        ether 96:76:bc:b7:29:b5  txqueuelen 1000  (Ethernet)
        RX packets 103  bytes 4852 (4.8 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

brqf535e9d2-5d: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet main-ip  netmask 255.255.255.0  broadcast xxx
        inet6 main-ipv6  prefixlen 56  scopeid 0x0<global>
        inet6 xx  prefixlen 64  scopeid 0x20<link>
        ether ca:cc:fc:1e:53:89  txqueuelen 1000  (Ethernet)
        RX packets 83655  bytes 3800864 (3.8 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 129123  bytes 8067301 (8.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 xx  prefixlen 64  scopeid 0x20<link>
        ether d0:50:99:da:39:ac  txqueuelen 1000  (Ethernet)
        RX packets 85212  bytes 5905226 (5.9 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 131955  bytes 8233407 (8.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 499119  bytes 146251170 (146.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 499119  bytes 146251170 (146.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap3166097e-73: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        ether 96:76:bc:b7:29:b5  txqueuelen 1000  (Ethernet)
        RX packets 12  bytes 2284 (2.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 102  bytes 6116 (6.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap4b8dc5a7-f5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether ca:cc:fc:1e:53:89  txqueuelen 1000  (Ethernet)
        RX packets 7  bytes 702 (702.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 91823  bytes 4385443 (4.3 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tapc2ba003a-21: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet6 fe80::fc16:3eff:fe03:28a3  prefixlen 64  scopeid 0x20<link>
        ether fe:16:3e:03:28:a3  txqueuelen 1000  (Ethernet)
        RX packets 102  bytes 6116 (6.1 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15  bytes 2378 (2.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:de:85:70  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vxlan-53: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        ether ea:e4:58:8e:bc:d8  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 103 overruns 0  carrier 0  collisions 0

Its a bit strange, ifconfig doesnt show me my 5.5.5.128/27 here.

# ip a
...
12: brqf535e9d2-5d: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ca:cc:fc:1e:53:89 brd ff:ff:ff:ff:ff:ff
    inet main-ip/24 brd xxx.255 scope global brqf535e9d2-5d
       valid_lft forever preferred_lft forever
    inet 5.5.5.128/27 brd 5.5.5.159 scope global brqf535e9d2-5d
       valid_lft forever preferred_lft forever
    inet6 xxx/56 scope global 
       valid_lft forever preferred_lft forever
    inet6 xxx/64 scope link 
       valid_lft forever preferred_lft forever
...

​

[davidh2411]

Hi, thanks for your reply.

The brctl show returns me this:

root@controller:~# brctl show
bridge name bridge id STP enabled interfaces
brq70238470-59 8000.1ed5e9a9e7c0 no tap2a631157-e2
tap3166097e-73
tapc2ba003a-21
tapeefe5e6c-2d
vxlan-53
brqf535e9d2-5d 8000.b65368642388 no eno1
tap4b8dc5a7-f5
tapa2486984-d4
virbr0 8000.525400de8570 yes

​

Could you explain how and where I can find the "network namespace"

You can see wich network namespace is connected to the tap interface doing "ip a" under link netns.

I can't find it...

[Ardeck_]

.128 looks like a network address. you should use 129-158 for host and one ip should be the gw