3

I've read multiple posts asking the same question, on KVM and open nebula forums and in general virtualization ones but have only found partial or bogus answers.

Some Info:

  • Objective: Be able to rent VPSs deployed on O.N.
  • Ubuntu Server 18.04 installed a few days ago, updated
  • ON is in a single host config (front-end & host are one)
  • I've got a /29 IP block, would like to use those IPs on VMs

Here's what I've gathered (and attempted) so far:

Based on the OpenNebula docs I've setup the OVS bridge like so:

# Create bridge and add port
ovs-vsctl add-br ovsbr0
ovs-vsctl add-port ovsbr0 enp3s0

# Change external IP address from port to bridge
ip addr flush dev enp3s0
ip addr add xxx.xxx.110.50/29 dev ovsbr0
ip link set ovsbr0 up
ip route add default via xxx.xxx.110.49 dev ovsbr0

This leaves me with access to the internet alright, and the bridge setup just like their example:

dba23490-cd85-40f4-a3b5-dfe9c4e2e60a
    Bridge "ovsbr0"
        Port "enp3s0"
            Interface "enp3s0"
        Port "ovsbr0"
            Interface "ovsbr0"
                type: internal
    ovs_version: "2.9.2"

cool! Well, this is the part where I'm lost. What now? how do I add this to Open Nebula so my new VMs have external IPs?

In case I'm failing hard, what other way could I do this?

Some other info that might be useful:

# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master ovs-system state UP group default qlen 1000
    link/ether 00:25:90:62:f9:60 brd ff:ff:ff:ff:ff:ff
3: enp4s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:25:90:62:f9:61 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:c6:e4:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:c6:e4:3e brd ff:ff:ff:ff:ff:ff
17: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether fa:1d:97:0a:8e:1c brd ff:ff:ff:ff:ff:ff
18: ovsbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 00:25:90:62:f9:60 brd ff:ff:ff:ff:ff:ff
    inet xxx.xxx.110.50/29 scope global ovsbr0
       valid_lft forever preferred_lft forever

# ip route
default via xxx.xxx.110.49 dev ovsbr0
xxx.xxx.110.48/29 dev ovsbr0 proto kernel scope link src xxx.xxx.110.50
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

Thanks in advance. Link to my OpenNebula forums post

John
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  • 4

1 Answers1

2

Finally got it working!

Here's my Virtual Network template:

BRIDGE = "ovsbr0"
BRIDGE_TYPE = "openvswitch"
DESCRIPTION = "Network with public IPs"
DNS = "8.8.8.8"
GATEWAY = "xxx.xxx.110.49"
OUTER_VLAN_ID = ""
PHYDEV = ""
SECURITY_GROUPS = "0"
VLAN = "YES"
VLAN_ID = ""
VN_MAD = "ovswitch"

# optional QoS params

INBOUND_AVG_BW = "5785"
INBOUND_PEAK_BW = "9000"
INBOUND_PEAK_KB = "20000"
OUTBOUND_AVG_BW = "4200"
OUTBOUND_PEAK_BW = "9000"
OUTBOUND_PEAK_KB = "20000"

Turns out this info isn't in the Deployment guide but in the Operation guide where you can find vnet templates.

Example given by them:

# Configuration attributes (OpenvSwitch driver)
NAME        = "Public"
DESCRIPTION = "Network with public IPs"

BRIDGE  = "br1"
VLAN    = "YES"
VLAN_ID = 12

DNS           = "8.8.8.8"
GATEWAY       = "130.56.23.1"
LOAD_BALANCER = 130.56.23.2

AR=[ TYPE = "IP4", IP = "130.56.23.2", SIZE = "1"]
AR=[ TYPE = "IP4", IP = "130.56.23.34", SIZE = "1"]
AR=[ TYPE = "IP4", IP = "130.56.23.24", SIZE = "1"]
AR=[ TYPE = "IP4", IP = "130.56.23.17", MAC= "50:20:20:20:20:21", SIZE = "1"]
AR=[ TYPE = "IP4", IP = "130.56.23.12", SIZE = "1"]
John
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