[Komal Thareja]

Hi Fegping,

Node1: ens7 maps to NIC3 It was configured as below:

NOTE the prefixlen is set to 128 instead of 64.

ens7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 2602:fcfb:1d:2::2 prefixlen 128 scopeid 0x0
inet6 fe80::7f:aeff:fe44:cbc9 prefixlen 64 scopeid 0x20 ether 02:7f:ae:44:cb:c9 txqueuelen 1000 (Ethernet)
RX packets 28126 bytes 2617668 (2.6 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2581 bytes 208710 (208.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

I brought this interface down and re-configured the IP address using the following command:

ip -6 addr add 2602:fcfb:1d:2::2/64 dev ens7

After this I can ping the gateway as well as other nodes.

root@node1:~# ping 2602:fcfb:1d:2::4
PING 2602:fcfb:1d:2::4(2602:fcfb:1d:2::4) 56 data bytes
64 bytes from 2602:fcfb:1d:2::4: icmp_seq=1 ttl=64 time=0.186 ms
^C
--- 2602:fcfb:1d:2::4 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.186/0.186/0.186/0.000 ms
root@node1:~# ping 2602:fcfb:1d:2::1
PING 2602:fcfb:1d:2::1(2602:fcfb:1d:2::1) 56 data bytes
64 bytes from 2602:fcfb:1d:2::1: icmp_seq=1 ttl=64 time=0.555 ms
^C
--- 2602:fcfb:1d:2::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.555/0.555/0.555/0.000 ms


Node2: IP was configured on ens7 However, mac address for NIC3 02:15:60:C2:7A:AD maps to ens9
I configured ens9 with the command ip -6 addr add 2602:fcfb:1d:2::3/64 dev ens9and can now ping gateway and other nodes.

 

root@node2:~# ping 2602:fcfb:1d:2::1
PING 2602:fcfb:1d:2::1(2602:fcfb:1d:2::1) 56 data bytes
64 bytes from 2602:fcfb:1d:2::1: icmp_seq=1 ttl=64 time=0.948 ms
64 bytes from 2602:fcfb:1d:2::1: icmp_seq=2 ttl=64 time=0.440 ms
^C
--- 2602:fcfb:1d:2::1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1007ms
rtt min/avg/max/mdev = 0.440/0.694/0.948/0.254 ms
root@node2:~# ping 2602:fcfb:1d:2::2
PING 2602:fcfb:1d:2::2(2602:fcfb:1d:2::2) 56 data bytes
64 bytes from 2602:fcfb:1d:2::2: icmp_seq=1 ttl=64 time=0.146 ms
64 bytes from 2602:fcfb:1d:2::2: icmp_seq=2 ttl=64 time=0.082 ms
^C
--- 2602:fcfb:1d:2::2 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1010ms
rtt min/avg/max/mdev = 0.082/0.114/0.146/0.032 ms


Please configure the IPs on other interfaces or share the IPs and I can help configure them.

Thanks,
Komal

[Komal Thareja]

Hi Elie,

Could you please share the output of the following commands from your container?

pip list|grep fabric

cat ~/work/fabric_config/requirements.txt

If you have any entries for fabrictestbed-extensions in ~/work/fabric_config/requirements.txt Please remove them and restart your container via File -> Hub Control Panel -> Stop My Server followed by Start My Server.

Thanks,

Komal

[Komal Thareja]

Hi Fengping,

I have rebooted both Node1 and Node2. They should be accessible now. Please set up the IPs as per the mac addresses shared above. Please do let me know if anything else is needed form my side.

Thanks,

Komal

 

 

[Komal Thareja]

You can confirm the interfaces for Node1 and Node2 via the mac addresses:

Node1

02:7F:AE:44:CB:C9 => NIC3

06:E3:D6:00:5B:06=> NIC2

02:BC:A6:3F:C7:CB=> NIC1

Node2

02:15:60:C2:7A:AD=>NIC3

02:1D:B9:31:E7:23=> NIC2

02:B5:53:89:2C:E6=> NIC1

Thanks,

Komal

[Komal Thareja]

Hi Fengping,

I think ens7 -> net1, ens8->net3 and ens9 -> net2 Please let me know once you get the public access back. I can help figure out the interfaces.

Thanks,

Komal

[Komal Thareja]

Hello Fengping,

I have re-attached the pci devices for the VMs: node1and node2. You would need to reassign the IP addresses back on them for your links to work. Please let us know if the links are working as expected after configuring the IP addresses.

Thanks,

Komal

[Komal Thareja]

Maintenance is completed. Testbed is open for use.

[Komal Thareja]

GKE cluster issues are resolved, Jupyter Hub is back online. Apologies for the inconvenience!

Thanks,

Komal

[Komal Thareja]

@yoursunny – Thank you for sharing the example scripts. Appreciate it!

@Xusheng – You can use FabNetv4Ext or FabNetv6Ext services as explained here.

Also, we have two example notebooks one each for FabNetv4Ext or FabNetv6Ext available via start_here.ipynb:

• FABNet IPv4 Ext (Layer 3): Connect to FABRIC’s IPv4 internet with external access (manual)
• FABNet IPv6 Ext (Layer 3): Connect to FABRIC’s IPv6 internet with external access (manual)

Thanks,
Komal

[Komal Thareja]

@yoursunny Thank you for sharing your script. We have updated MTU setting across sites and were able to use your script as well for testing. However, with latest fablib changes for performance improvements, the script needed to be adjusted a little bit. Sharing the updated script here.

Thanks,
Komal

[Komal Thareja]

Hi Fengping,

Thank you so much for reporting this issue. There was a bug which led to allocating same subnet to multiple slices. So when a second slice got allocated the same subnet the traffic stopped working for your slice.

I have applied the fix for the bug on production. Could you please delete your slice and recreate it? Apologies for the inconvenience.

Appreciate your help with making the system better.

Thanks,
Komal

[Komal Thareja]

Please try this to create 12 VMs, this shall let you use almost the entire worker w.r.t cores. I will keep you posted about the flavor details.

#Create Slice
slice = fablib.new_slice(name=slice_name)

# Network
net1 = slice.add_l2network(name=network_name, subnet=IPv4Network("192.168.1.0/24"))

node_name = "Node"
number_of_nodes = 12
for x in range(number_of_nodes):
  disk = 500
  if x == 0:
    disk = 4000
  node = slice.add_node(name=f'{node_name}{x}', site=site, cores='62', ram='128', disk=disk)
  iface = node.add_component(model='NIC_Basic', name='nic1').get_interfaces()[0]
  iface.set_mode('auto')
  net1.add_interface(iface)

#Submit Slice Request
slice.submit();

Thanks,
Komal

[Komal Thareja]

With the current flavor definition, I would recommend requesting VMs with the configuration:

cores='62', ram='384', disk='2000'

Anything bigger than this maps to fabric.c64.m384.d4000 and only one of the workers i.e. cern-w1 can accomodate 4TB disks and rest of the worker can at max accomodate 2TB disk. I will discuss this internally to work on providing a better flavor to accomodate your slice.

Thanks,

Komal

P.S: I was able to successfully create a slice with the above configuration.

• This reply was modified 1 year, 10 months ago by Komal Thareja.

[Komal Thareja]

I looked at the instance types, please try setting the core='62', ram='384', disk='100'

FYI: https://github.com/fabric-testbed/InformationModel/blob/master/fim/slivers/data/instance_sizes.json this might be useful for VM sizing.

Thanks,

Komal

[Komal Thareja]

I looked at your slices and found that you have 2 Dead Slices and 6 Closing Slices. All the slices are requesting VMs on a single site CERN. All the Slice requests are requesting either 120 or 60 cores. Regardless of the disk size, for core/ram requested these are mapped to the following flavors. Considering that there are other slices also on CERN site, your slice cannot be accommodated by single CERN site. Please consider either spanning your slice across multiple sites or reducing the size of the VM not only w.r.t disk but also cores/ram.

We currently only have a limited number of flavors and your core/ram request is being mapped to a huge disk.

core: 120 , ram: 480 G, ==>  fabric.c64.m384.d4000

core: 60 , ram: 360 G,  ==> fabric.c60.m384.d2000

NOTE: No manual cleanup is needed the software is behaving as designed.

Thanks,

Komal

[Author]

Posts