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    Xscontainer

    Scheduled Pinned Locked Moved Advanced features
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    • kiuK
      kiu @stormi
      last edited by

      @stormi Hello, I don't really see how to solve the ssh problem or even solve the problem with python.

      1 Reply Last reply Reply Quote 0
      • stormiS
        stormi Vates 🪐 XCP-ng Team
        last edited by

        If I understand correctly:

        • your root user in XCP-ng has a SSH key that was generated by the script
        • this key was added to the authorized_keys file for your user in the VM
        • this should allow root on XCP-ng to login with ssh without a password, but this doesn't

        So: try to login with ssh, without password, outside the script. Add one or more -v switches to SSH. Check the web for similar issues.

        kiuK 1 Reply Last reply Reply Quote 0
        • kiuK
          kiu @stormi
          last edited by

          @stormi Hi, I just tested and it still doesn't work 😕

          1 Reply Last reply Reply Quote 0
          • olivierlambertO
            olivierlambert Vates 🪐 Co-Founder CEO
            last edited by

            Can you be more specific?

            kiuK 1 Reply Last reply Reply Quote 0
            • kiuK
              kiu @olivierlambert
              last edited by

              @olivierlambert I still have the same problem, even adding the ssh keys before running xscontainer.

              1 Reply Last reply Reply Quote 0
              • olivierlambertO
                olivierlambert Vates 🪐 Co-Founder CEO
                last edited by

                Have you followed the details given by @stormi ? You should have some detailed output then

                kiuK 2 Replies Last reply Reply Quote 0
                • kiuK
                  kiu @olivierlambert
                  last edited by

                  @olivierlambert I have this output :

                  [13:24 xcp-ng-XXXX ~]# ssh -v XXX@XXXXXXXXX
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug1: Connecting to XXXXXXXX [XXXXXXXX] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.7
debug1: match: OpenSSH_8.7 pat OpenSSH* compat 0x04000000
debug1: Authenticating to XXXXXXXXX:22 as 'XXXXXXXX'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:bmXWosoos6FqfYJXXYPv1H5lU4fRKIucvEv1QE/chN0
debug1: Host 'XXXXXXXXXXXX' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com,webauthn-sk-ecdsa-sha2-nistp256@openssh.com>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:0)

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:0)

debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: Trying private key: /root/.ssh/id_ed25519
debug1: Next authentication method: password
XXXXX@XXXXXXXXX's password: 
debug1: Authentication succeeded (password).
Authenticated to XXXXXXXXXXXX ([XXXXXXXXXX]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Sending environment.
debug1: Sending env LANG = fr_FR.UTF-8
Last login: Mon Jan 23 13:23:33 2023
[XXXXX@docker ~]$
                  1 Reply Last reply Reply Quote 0
                  • kiuK
                    kiu @olivierlambert
                    last edited by

                    @olivierlambert @stormi up 🙂

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                    • olivierlambertO
                      olivierlambert Vates 🪐 Co-Founder CEO
                      last edited by

                      Can you check the presence of the key inside your VM?

                      kiuK 1 Reply Last reply Reply Quote 0
                      • kiuK
                        kiu @olivierlambert
                        last edited by olivierlambert

                        @olivierlambert yes 🙂

                        Output to docker machine :

                        [XXXX@docker ~]$ cat .ssh/authorized_keys 
ssh-rsa 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 root@xcp-ng-XXX
[XXXX@docker ~]$

                        Output to XCP machine :

                        [07:53 xcp-ng-XXXX ~]# cat .ssh/known_hosts 
192.XXX.XXX.XXX ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNJxGOt3RvDXvelRUPTYyIHmykXhfRWSEN6PXSKYUVxct8qjENHqqqAEJOrl6E5cF9orOGQfbAPjSlLwNqGUGlo=
[07:55 xcp-ng-XXX ~]#
                        BenjiReisB 1 Reply Last reply Reply Quote 0
                        • stormiS
                          stormi Vates 🪐 XCP-ng Team
                          last edited by

                          One or more added -v to ssh might tell why the keys are not accepted.

                          1 Reply Last reply Reply Quote 0
                          • BenjiReisB
                            BenjiReis Vates 🪐 XCP-ng Team @kiu
                            last edited by

                            @kiu I reproduced your issue.

                            The issue comes from a lib used by xscontainer as a SSH Client which use a deprecated algo ssh-rsa so all modern (>=8.7) OpenSSH reject the connexion.

                            BenjiReisB 1 Reply Last reply Reply Quote 1
                            • BenjiReisB
                              BenjiReis Vates 🪐 XCP-ng Team @BenjiReis
                              last edited by

                              @BenjiReis following: I tested on a Centos7 VM with an older openssh and the prepare VM script was successful.

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                              • stormiS
                                stormi Vates 🪐 XCP-ng Team
                                last edited by stormi

                                So, we found the reason: xscontainer in XCP-ng currently uses a rather old version of python2-paramiko, which seems to insist on using ssh-rsa algorithms, support for which was dropped in recent openssh releases.

                                That's why it works for some distros and not for others.

                                We'll see it to update the components. Meanwhile, it's possible to fix it by installing python2-pip from EPEL and then upgrading first to "cryptography < 2.6" and then to "paramiko < 3". However, doing this as root may overwrite the files from the RPMs so it's not really clean. I'd advise it only for testing.

                                kiuK 2 Replies Last reply Reply Quote 3
                                • kiuK
                                  kiu @stormi
                                  last edited by

                                  @stormi OK, thanks. I will try your solution on a small lab.

                                  1 Reply Last reply Reply Quote 0
                                  • kiuK
                                    kiu @stormi
                                    last edited by

                                    @stormi I tried to do it but I don't think I succeeded. Could you send me a more specific doc of what you are doing?

                                    thanks 🙂

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                                    • stormiS
                                      stormi Vates 🪐 XCP-ng Team
                                      last edited by stormi

                                      UPDATE 2024-03-19: DON'T DO THIS. We won't support any XCP-ng hosts where system packages have been overriden with pip.

                                      I think these are the steps that worked for me:

                                      yum install xscontainer
yum install python2-pip --enablerepo=epel
pip2 install --upgrade "pip < 21"
pip2 install --upgrade "cryptography == 2.5"
pip2 install --upgrade "paramiko < 3"

                                      As this is done outside a virtualenv (I've tried inside a virtualenv, but I think xscontainer runs stuff outside of it, so it didn't work), this will overwrite the contents of RPMs you installed, so, again, only for testing.

                                      I also had to remove the former host key from the VM metadata:

                                       xe vm-param-remove uuid=... param-name=other-config param-key=xscontainer-sshhostkey
                                      kiuK 1 Reply Last reply Reply Quote 1
                                      • kiuK
                                        kiu @stormi
                                        last edited by

                                        @stormi Thanks, I just tried that and it still doesn't work 😞

                                        1 Reply Last reply Reply Quote 0
                                        • stormiS
                                          stormi Vates 🪐 XCP-ng Team
                                          last edited by

                                          Well, I tried it myself on a freshly installed pool, and this worked. Can you elaborate on what doesn't work?

                                          kiuK 1 Reply Last reply Reply Quote 0
                                          • kiuK
                                            kiu @stormi
                                            last edited by

                                            @stormi I still have the same problem, the key does not want to install and asks me if I want to try again.

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