LDXを備えたHostマシン(Kubuntu 18.04のKVM)guest(ubuntu18.04イメージに基づく)があります。
ゲストからホストにsshできます。
しかし、ホストからゲストにsshしようとすると、
権限が拒否されました(公開鍵)
エラー
再現手順:
私は何を間違っていますか?
完全なセッショントランスクリプトの下
sysop@kvmneo4j:~$ lxc list
+----------+---------+-------------------+------+------------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+----------+---------+-------------------+------+------------+-----------+
| base1804 | RUNNING | 10.0.0.205 (eth0) | | PERSISTENT | 0 |
+----------+---------+-------------------+------+------------+-----------+
sysop@kvmneo4j:~$ lxc exec base1804 bash
root@base1804:~# exec login ubuntu
Password:
Last login: Wed Jan 2 18:58:10 UTC 2019 on UNKNOWN
Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-43-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Wed Jan 2 19:02:28 UTC 2019
System load: 1.69 Processes: 22
Usage of /home: unknown Users logged in: 0
Memory usage: 1% IP address for eth0: 10.0.0.205
Swap usage: 0%
Get cloud support with Ubuntu Advantage Cloud Guest:
http://www.ubuntu.com/business/services/cloud
0 packages can be updated.
0 updates are security updates.
Failed to connect to https://changelogs.ubuntu.com/meta-release-lts. Check your Internet connection or proxy settings
To run a command as administrator (user "root"), use "Sudo <command>".
See "man Sudo_root" for details.
ubuntu@base1804:~$ ssh [email protected]
[email protected]'s password:
Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-43-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
* Canonical Livepatch is available for installation.
- Reduce system reboots and improve kernel security. Activate at:
https://ubuntu.com/livepatch
Failed to connect to https://changelogs.ubuntu.com/meta-release-lts. Check your Internet connection or proxy settings
Last login: Wed Jan 2 19:58:42 2019 from 10.0.0.205
sysop@kvmneo4j:~$ logout
Connection to 10.0.0.1 closed.
ubuntu@base1804:~$ logout
sysop@kvmneo4j:~$ ssh -v [email protected]
OpenSSH_7.6p1 Ubuntu-4ubuntu0.1, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 10.0.0.205 [10.0.0.205] port 22.
debug1: Connection established.
debug1: identity file /home/sysop/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/sysop/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4ubuntu0.1
debug1: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.1 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 10.0.0.205:22 as 'ubuntu'
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: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server Host key: ecdsa-sha2-nistp256 SHA256:i0Ezo01qJyhIue4PIRobOw/qKuvDW/7OJZzgB0X5jGM
debug1: Host '10.0.0.205' is known and matches the ECDSA Host key.
debug1: Found key in /home/sysop/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: RSA SHA256:EfYKpv5N+M8YBgCFjjy3P9M0jYt7DObq9ApoZ0G8qL4 /home/sysop/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/sysop/.ssh/id_dsa
debug1: Trying private key: /home/sysop/.ssh/id_ecdsa
debug1: Trying private key: /home/sysop/.ssh/id_ed25519
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey).
sysop@kvmneo4j:~$
デフォルトでは、コンテナのすべてのUbuntu lxd
イメージは、SSH構成でPasswordAuthentication no
を使用して設定されています。
コンテナーに直接移動し、構成をroot
として編集する必要があります。
(1)lxc Shell CONTAINER-NAME
は、root
シェルにドロップします。
(2)nano /etc/ssh/sshd_config
は、そのファイルに対してnano
テキストエディターを開きます。
(3)PasswordAuthentication no
という行を見つけて、yes
に設定します。
(4) Ctrl+W ファイルを書き込む Ctrl+X ファイルを閉じます。
(5)Sudo systemctl restart ssh
を使用してSSHサービスを再起動します。
これで、ホストシステムからコンテナーにSSHで接続できるようになります。
認証には公開鍵を使用できます。
cat <public_key_file_on_Host> | lxc exec <container> -- sh -c "cat >> /home/ubuntu/.ssh/authorized_keys"
lxc exec <container> -- systemctl restart ssh
ssh ubuntu@<container_ip>
ノート:
<public_key_file_on_Host>
:~/.ssh/id_rsa.pub
(またはssh-keygen -t rsa
で新しいものを生成)<container_ip>
はlxc list
で取得できますSudo systemd-resolve --interface=lxdbr0 --set-dns=`ip -f inet addr show dev lxdbr0 | grep -Po 'inet \K[\d.]+'` --set-domain=lxd
ssh ubuntu@<container>.lxd
ゲストからお試しください:
ssh -A Host
その後、ホストから:
ssh final-destination
「-A」はゲストからホストにエージェントを転送します。