Unable to access nodes SRI and MICH

[Sourya Saha]

I am working on a slice with 5 nodes – LOSA, MICH, SRI, WASH and SALT. Since last few days, I am unable to access the nodes SRI and MICH. The error message is as follows:

Warning: Permanently added ‘bastion.fabric-testbed.net’ (ED25519) to the list of known hosts.
ssaha2_0000165519@bastion.fabric-testbed.net: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535

Ironically, the other nodes are still accessible.

[Mert Cevik]

You need to provide your slice ID, then we will be able to check.

[Sourya Saha]

Slice ID is 844a7ecc-e1c0-4b07-bc3b-1809f826fc0a

[Mert Cevik]

MICH VM (2607:f018:110:11:f816:3eff:fe98:ba32) is online. I confirmed connection over the management network (through FABRIC bastion hosts) works well. It has an ssh key with alias “slice_key” in it (under user ubuntu)

SRI VM (192.5.67.209) is online (responding to pings), but it does not allow SSH connections that it’s supposed to allow from the controller node. SSH keys might have been modified somehow. I don’t have much to do with this VM.

[Sourya Saha]

Is it possible to remove just SRI VM from this slice?

[Mert Cevik]

Slice modification is supported on FABRIC. Yes you can remove the SRI VM and re-create VMs etc. It should be straightforward, but you can also check the link below for examples

https://github.com/fabric-testbed/jupyter-examples/blob/main/fabric_examples/fablib_api/modify_slice/modify-add-node-network.ipynb

[Sourya Saha]

Thank you.

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