Network problem connecting from other hosts

Thunderlight1 · October 1, 2017, 10:43pm

I have installed Opennebula 5.4.1 and configured two network bridges on the nodes. I then initiate an Ubuntu instance which gets an IP. I can’t ping the virtual machine from any other node except from the node where it was created. All the firewalls are turned off on all machines.
Please see details bellow:

** Nebula1 **
cesar@nebula1:~$ brctl show
bridge name	bridge id		STP enabled	interfaces
br0		8000.080027bfd3ee	no		enp0s3
br1		8000.0800271e6246	no		enp0s8
virbr0		8000.525400c91dfd	yes		virbr0-nic



cesar@nebula1:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    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
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
    link/ether 08:00:27:bf:d3:ee brd ff:ff:ff:ff:ff:ff
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br1 state UP group default qlen 1000
    link/ether 08:00:27:1e:62:46 brd ff:ff:ff:ff:ff:ff
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:c9:1d:fd 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
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:c9:1d:fd brd ff:ff:ff:ff:ff:ff
8: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 08:00:27:bf:d3:ee brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.65/24 brd 192.168.1.255 scope global br0
       valid_lft forever preferred_lft forever
9: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 08:00:27:1e:62:46 brd ff:ff:ff:ff:ff:ff
    inet 10.10.10.11/24 brd 10.10.10.255 scope global br1
       valid_lft forever preferred_lft forever

** Nebula2 **

cesar@nebula2:~$ brctl show
bridge name bridge id STP enabled interfaces
br0 8000.0800277942a5 no enp0s3
one-23-0
br1 8000.0800275e3a5d no enp0s8
virbr0 8000.52540062db83 yes virbr0-nic

cesar@nebula2:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
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
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
link/ether 08:00:27:79:42:a5 brd ff:ff:ff:ff:ff:ff
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br1 state UP group default qlen 1000
link/ether 08:00:27:5e:3a:5d brd ff:ff:ff:ff:ff:ff
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:62:db:83 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
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:62:db:83 brd ff:ff:ff:ff:ff:ff
11: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 08:00:27:79:42:a5 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.66/24 brd 192.168.1.255 scope global br0
valid_lft forever preferred_lft forever
12: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 08:00:27:5e:3a:5d brd ff:ff:ff:ff:ff:ff
inet 10.10.10.12/24 brd 10.10.10.255 scope global br1
valid_lft forever preferred_lft forever
13: one-23-0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN group default qlen 1000
link/ether fe:00:c0:a8:01:7d brd ff:ff:ff:ff:ff:ff

> cesar@nebula2:~$ sudo systemctl status ufw
> ● ufw.service - Uncomplicated firewall
>    Loaded: loaded (/lib/systemd/system/ufw.service; disabled; vendor preset: ena
>    Active: inactive (dead)

** Frontend-server **

> oneadmin@front1:/home/cesar$ onevnet show Internet
> VIRTUAL NETWORK 6 INFORMATION                                                   
> ID             : 6                   
> NAME           : Internet            
> USER           : oneadmin            
> GROUP          : oneadmin            
> CLUSTERS       : 0                   
> BRIDGE         : br0                 
> VN_MAD         : dummy               
> USED LEASES    : 1                   
> 
> PERMISSIONS                                                                     
> OWNER          : um-                 
> GROUP          : ---                 
> OTHER          : ---                 
> 
> VIRTUAL NETWORK TEMPLATE                                                        
> BRIDGE="br0"
> DNS="192.168.1.4"
> GATEWAY="192.168.1.1"
> NETWORK_ADDRESS="192.168.1.125"
> NETWORK_MASK="255.255.255.0"
> PHYDEV=""
> SECURITY_GROUPS="0"
> VLAN_ID=""
> VN_MAD="dummy"
> 
> ADDRESS RANGE POOL                                                              
> AR 0                                                                            
> SIZE           : 25                  
> LEASES         : 1                   
> 
> RANGE                                   FIRST                               LAST
> MAC                         02:00:c0:a8:01:7d                  02:00:c0:a8:01:95
> IP                              192.168.1.125                      192.168.1.149
> 
> 
> LEASES                                                                          
> AR  OWNER                         MAC              IP                        IP6
> 0   V:23            02:00:c0:a8:01:7d   192.168.1.125                          -
> 
> VIRTUAL ROUTERS




oneadmin@front1:/home/cesar$  onetemplate show 11
TEMPLATE 11 INFORMATION                                                         
ID             : 11                  
NAME           : Ubuntu 16.04 - KVM  
USER           : oneadmin            
GROUP          : oneadmin            
REGISTER TIME  : 10/01 23:53:36      

PERMISSIONS                                                                     
OWNER          : um-                 
GROUP          : ---                 
OTHER          : ---                 

TEMPLATE CONTENTS                                                               
CONTEXT=[
  NETWORK="YES",
  SSH_PUBLIC_KEY="$USER[SSH_PUBLIC_KEY]" ]
CPU="1"
DISK=[
  IMAGE_ID="13" ]
GRAPHICS=[
  LISTEN="0.0.0.0",
  TYPE="vnc" ]
LOGO="images/logos/ubuntu.png"
MEMORY="768"
OS=[
  ARCH="x86_64" ]

marcindulak · October 2, 2017, 8:13am

Looks similar to https://forum.opennebula.io/t/trouble-with-networking-after-successul-install/

Thunderlight1 · October 3, 2017, 7:01pm

Probably is. I tried to have it working according to the instruction, but failed. So I installed it on CentOS instead. Thanks for the help.

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Network problem connecting from other hosts

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