[one-users] Not able to ping running VM from outside network

Errol Samuels esamuels at carismatel.com
Fri Nov 25 08:10:27 PST 2011


Hello,

OK here it goes:

*Route Print from Opennebula Control Server:*

root at cps:/srv/cloud/one/one-templates# route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
1.1.75.192    0.0.0.0         255.255.255.248 U     0      0        0 eth0
172.22.55.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
0.0.0.0         1.1.75.193    0.0.0.0         UG    100    0        0 eth0

root at cps:/srv/cloud/one/one-templates# ping -c 5 1.1.74.147

PING 1.1.74.147 (1.1.74.147) 56(84) bytes of data.
64 bytes from 1.1.74.147: icmp_req=1 ttl=64 time=1.65 ms
64 bytes from 1.1.74.147: icmp_req=2 ttl=64 time=0.366 ms
64 bytes from 1.1.74.147: icmp_req=3 ttl=64 time=0.405 ms
64 bytes from 1.1.74.147: icmp_req=4 ttl=64 time=0.400 ms
64 bytes from 1.1.74.147: icmp_req=5 ttl=64 time=0.426 ms

--- 1.1.74.147 ping statistics ---

*Route Print from KVM hypervisor:*
**
root at vmh:~# route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
0.0.0.0         1.1.74.145    0.0.0.0         UG    100    0        0 virbr0
1.1.74.144    0.0.0.0         255.255.255.248 U     0      0        0 virbr0
172.22.55.0     0.0.0.0         255.255.255.0   U     0      0        0 
virbr1

*From my iMAC*

I am able to ping both the Control Server (1.1.75.194) and the KVM Host 
(1.1.74.146) but not the VM (1.1.74.147).


*This is my "Red LAN NJ01" configuration:*

NAME = "Red LAN NJ01 "
TYPE = FIXED

# We have to bind this network to 'virbr0' for Internet Access
BRIDGE = virbr0

LEASES = [ IP="1.1.74.147"]
LEASES = [ IP="1.1.74.148"]
LEASES = [ IP="1.1.74.149"]
LEASES = [ IP="1.1.74.150"]

GATEWAY = 1.1.74.145
DNS = 208.67.222.222

*This is my ttylinux.one configuration:*

NAME   = ttylinux
CPU    = 0.1
MEMORY = 64

DISK   = [ IMAGE_ID = 2 ]

NIC    = [ NETWORK_ID = 13 ]

FEATURES=[ acpi="no" ]

CONTEXT = [
     hostname    = "$NAME",
     ip_public   = "1.1.74.147",
     files      = "/srv/cloud/one/one-templates/init.sh 
/srv/cloud/one/.ssh/id_rsa.pub",
     target      = "hdc",
     root_pubkey = "id_rsa.pub",
     username    = "oneadmin",
     user_pubkey = "id_rsa.pub"
  ]

Interestly, I did an ifconfig in the VM and I see the the Broadcast and 
the Netmask are incorrect.

# ifconfig
eth0    Link encap:Ethernet  HWaddr 02:00:41:62:4A:93
           inet addr:1.1.74.147  Bcast:1.255.255.255  Mask:255.0.0.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:257 errors:0 dropped:0 overruns:0 frame:0
           TX packets:124 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:25210 (24.6 KiB)  TX bytes:14670 (14.3 KiB)
           Interrupt:11 Base address:0xc100

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:8 errors:0 dropped:0 overruns:0 frame:0
           TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:592 (592.0 B)  TX bytes:592 (592.0 B)

So it looks like a virtual network configuration issue somewhere but I 
can't put my hand on it.

Best regards,

Errol

On 25/11/2011 15:08, Zeeshan Ali Shah wrote:
> what does route -n on both machine where you can ping and from where 
> you cannot show ...
>
> On Fri, Nov 25, 2011 at 3:42 PM, Errol Samuels 
> <esamuels at carismatel.com <mailto:esamuels at carismatel.com>> wrote:
>
>     Hello,
>
>     I am trying to get the test ttylinux VM going after a few days of
>     putting together bits of documentation to get a better
>     understanding of KVM. So far the VM is running and I am able to
>     ssh into it from the Control Server and the Host but I am unable
>     to ping it from any other external IP.
>
>     I checked the relevant FAQ:
>     "http://wiki.opennebula.org/faq#my_vm_is_running_but_i_get_no_answer_from_pings_what_s_wrong"
>     <http://wiki.opennebula.org/faq#my_vm_is_running_but_i_get_no_answer_from_pings_what_s_wrong> 
>     and made some comments below.
>
>>     There are several reasons for this, check:
>>
>>      *
>>         You have created a network with a valid bridge in the nodes
>>         of your cluster
>>
>
>     Yes, the bridge configuration is as follows:
>
>     ** ( Real IP has been substituted ) **
>
>     auto eth0
>     iface eth0 inet manual
>     auto virbr0
>     iface virbr0 inet static
>        address 1.1.74.146
>        netmask 255.255.255.248
>        network 1.1.74.144
>        gateway 1.1.74.145
>        broadcast 1.1.74.151
>        bridge_ports eth0
>        bridge_fd 9
>        bridge_hello 2
>        bridge_maxage 12
>        bridge_stp off
>
>>      *
>>         You have defined a NIC attribute in your VM attached to that
>>         network
>>
>
>     NAME   = ttylinux
>     CPU    = 0.1
>     MEMORY = 64
>
>     DISK   = [ IMAGE_ID = 2 ]
>
>     NIC    = [ NETWORK_ID = 10 ]
>
>     FEATURES=[ acpi="no" ]
>
>     CONTEXT = [
>         hostname    = "$NAME",
>         ip_public   = "1.1.74.147",
>         files      = "/srv/cloud/one/one-templates/init.sh
>     /srv/cloud/one/.ssh/id_rsa.pub",
>         target      = "hdc",
>         root_pubkey = "id_rsa.pub",
>         username    = "oneadmin",
>         user_pubkey = "id_rsa.pub"
>      ]
>
>>      *
>>         The VM is prepared to configure the interface to use a valid
>>         IP in that network. You can:
>>          o
>>             Configure the VM to dynamically configure the IP using
>>             its MAC address (Contextualzation
>>             <http://wiki.opennebula.org/documentation:rel2.2:cong>)
>>          o
>>             Configure the VM to statically set a given IP of the network
>>          o
>>             Put a DHCP server attached to that network
>>
>
>     Yes, the VM is statically set a given IP of the network.
>
>>      *
>>         Also be sure that you are pinging the VM from a host with a
>>         route to the network
>>
>
>     Yes, I am able to ping and ssh the VM from the Control Server
>     which is on the same public VLAN but I am unable to ping that IP
>     from my network for example.
>
>
>     oneadmin at cps:~/one-templates$ onevnet list
>       ID USER     GROUP    NAME              TYPE BRIDGE PUB  LEASES
>       10 oneadmin oneadmin Red LAN NJ01         F virbr0  No       1
>         5 oneadmin oneadmin Blue LAN                 R virbr1 No       0
>
>
>     oneadmin at cps:~/one-templates$ onevm list
>         ID USER     GROUP    NAME         STAT CPU     MEM       
>     HOSTNAME        TIME
>         13 oneadmin oneadmin ttylinux     runn   4     64M
>     vmh-usnjewr-eqi 00 01:09:54
>
>     Opennebula Version = 3.0.0 compiled from source
>     Installation Type = Self contained in /srv/cloud/one
>     Hypervisor = KVM
>     Control Server OS: Ubuntu 11.04 LTS
>     KVM Host OS: Ubuntu 11.10 LTS
>     Storage = Non Shared File System
>
>     Any assistance will be much appreciated.
>
>     Thanks in Advance.
>
>     Errol
>
>
>
>
>
>
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>
>
>
>
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