Failed ssh for rhcos

akhilesh verma

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May 27, 2021, 10:10:14 AM5/27/21

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Hi ,

I am facing below error while creating a new rhcos VM:

2021/05/27 13:34:37 packer-builder-vsphere-iso plugin: [DEBUG] SSH handshake err: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

2021/05/27 13:34:37 packer-builder-vsphere-iso plugin: [DEBUG] Detected authentication error. Increasing handshake attempts.

==> vsphere-iso: Error waiting for SSH: Packer experienced an authentication error when trying to connect via SSH. This can happen if your username/password are wrong. You may want to double-check your credentials as part of your debugging process. original error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

here is the input json file:

{

"builders": [

{

"CPUs": "{{user `vm_vcpu`}}",

"RAM": "{{user `vm_memory`}}",

"boot_command": [

"<tab>",

"sudo coreos-installer install /dev/sda --ignition-url {{user `ocp_url_ign`}} --image-url {{user `ocp_url_image`}} --insecure-ignition",

"<wait>",

"<enter>",

"<wait>"

],

"boot_order": "disk,cdrom",

"boot_wait": "30s",

"cluster": "{{user `vcenter_cluster`}}",

"communicator": "ssh",

"convert_to_template": false,

"datacenter": "{{user `vcenter_datacenter`}}",

"datastore": "{{user `vcenter_datastore_vm`}}",

"disk_controller_type": "pvscsi",

"folder": "{{user `vcenter_folderpath`}}",

"guest_os_type": "rhel7_64Guest",

"host": "{{ user `vcenter_host`}}",

"insecure_connection": "true",

"iso_paths": [

"[{{user `vcenter_datastore_iso` }}] {{user `vcenter_iso_path` }}"

],

"network_adapters": [

{

"network": "{{user `vm_network`}}",

"network_card": "vmxnet3"

}

],

"password": "{{user `vcenter_password`}}",

"shutdown_command": "sudo -S shutdown -P now",

"ssh_username": "core",

"ssh_private_key_file": "/home/ubuntu/.ssh/id_rsa",

"ssh_timeout": "{{user `ssh_timeout`}}",

"storage": [

{

"disk_size": "{{user `vm_disksize`}}",

"disk_thin_provisioned": true

}

],

"type": "vsphere-iso",

"username": "{{user `vcenter_username`}}",

"vcenter_server": "{{user `vcenter_server`}}",

"vm_name": "{{user `ocp_clustername` }}-{{user `ocp_nodename`}}",

"vm_version": 13

}

],

"variables": {

"ocp_clustername": "test-ocp",

"ocp_domainname": "ocp.lan",

"ocp_nodename": "av-bootstrap",

"ocp_nodetype": "bootstrap",

"ocp_url_ign": "http://xxx.xxx.x.x:8080/ocp4/bootstrap.ign",

"ocp_url_image": "http://xxx.xxx.x.xx:8080/ocp4/rhcos-4.6.8-x86_64-metal.x86_64.raw.gz",

"vcenter_cluster": "accloud",

"vcenter_datacenter": "Datacenter",

"vcenter_datastore_iso": "datastore1",

"vcenter_datastore_vm": "datastore1",

"vcenter_folderpath": "",

"vcenter_host": "xxx.xxx.xx.xx",

"vcenter_iso_path": "ISOS/rhcos-4.6.8-x86_64-live.x86_64.iso",

"vcenter_password": "xxxxxxxxxxxx",

"vcenter_server": "your-server",

"vcenter_username": "admini...@vsphere.local",

"vm_disksize": "61440",

"vm_memory": "16384",

"vm_network": "internal_network",

"vm_v4address": "xxx.xxx.x.xx",

"vm_v4defaultgw": "xxx.xxx.x.x",

"vm_v4dns_server": "xxx.xxx.x.xx",

"vm_v4netmask": "255.255.255.0",

"ssh_timeout": "180s",

"vm_vcpu": "4"

}

Thanks,

Akhilesh Verma

Alvaro Miranda Aguilera

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May 28, 2021, 6:15:44 AM5/28/21

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can you see to the new machine when is created ?

using his user and key?

core

/home/ubuntu/.ssh/id_rsa

?

The ip should be one defined here:

vm_v4address": "xxx.xxx.x.xx",

I fail to see how this boot from iso will create this user, allow login with this private key and set fixed IP

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Alvaro

Akhilesh Verma

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May 28, 2021, 6:30:32 AM5/28/21

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I tried as suggested by you but no luck. ip address is same as given in the json file.

manually and packer both failed to ssh with given key.

Thanks,

Akhilesh Verma

To view this discussion on the web visit https://groups.google.com/d/msgid/packer-tool/CAHqq0eyOqxXqLRXF1jNZG3A%3Dc2yd4MmgLu48nQSYO5U9mkSFhQ%40mail.gmail.com.

akhilesh verma

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May 28, 2021, 6:31:27 AM5/28/21

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I tried as suggested by you but no luck. ip address is same as given in the json file.

manually and packer both failed to ssh with given key.

Thanks,

Akhilesh Verma

To view this discussion on the web visit https://groups.google.com/d/msgid/packer-tool/CAHqq0eyOqxXqLRXF1jNZG3A%3Dc2yd4MmgLu48nQSYO5U9mkSFhQ%40mail.gmail.com.

Alvaro Miranda Aguilera

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May 28, 2021, 7:02:21 AM5/28/21

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you need to make sure you can ssh to the VM on the ip, using the specified user and key first

otherwise packer as you can't ssh into.

I will suggest to get familiar with packer first, here:

https://learn.hashicorp.com/packer

And then try to get some base box working, when you see how pieces connect, you will be able to complete the project on the OS you are trying to use, but few things need to happen for packer to work.

- Packer creates a VM

- optionally packer type a boot instruction

- Machine install/reboot, or start from an existing VM

- packer ssh into

- optional provisioning

- shutdown

Thanks

Alvaro

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