ssh trabalhos remotos a partir da linha de comando do bash mas não do script bash

0

(Nota: Embora eu tenha respondido algumas das minhas próprias perguntas, ainda tenho uma pergunta não respondida no final deste post.)

Quando executo o seguinte comando a partir de uma linha de comando bash, ele funciona.

ssh -t -v [email protected] sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish

E a saída detalhada ssh é:

OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.29.205 [192.168.29.205] port 22.
debug1: Connection established.
debug1: identity file /home/my-rails-project/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.29.205:22 as 'my-rails-project'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
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:EnDsn2kFQgiA56e4B2UuvDr3ajTLlN7/15lxLItnjUQ
debug1: Host '192.168.29.205' is known and matches the ECDSA host key.
debug1: Found key in /home/my-rails-project/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/my-rails-project/.ssh/id_rsa
debug1: Server accepts key: pkalg rsa-sha2-512 blen 279
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.29.205 ([192.168.29.205]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending command: sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish

A mesma linha está em um script bash e eu recebo

OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.29.205 [192.168.29.205] 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_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.29.205:22 as 'my-rails-project'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
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:EnDsn2kFQgiA56e4B2UuvDr3ajTLlN7/15lxLItnjUQ
debug1: Host '192.168.29.205' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
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: No more authentication methods to try.
Permission denied (publickey).

As duas saídas divergem na linha (script)

debug1: Found key in /root/.ssh/known_hosts:1

(linha de comando)

debug1: Found key in /home/my-rails-project/.ssh/known_hosts:1

Não sei se essa divergência aponta para o problema.

Então, minha pergunta é:

Por que o ssh está olhando para /root/.ssh/known_hosts ao executar a partir de um script e olhando para /home/my-rails-project/.ssh/known_hosts quando executado a partir da linha de comando?

Respondendo a minha pergunta imediatamente acima:

Ok, enquanto escrevia isso, a resposta para a divergência ficou clara: eu estava executando o script como

sudo myScript

Então, minha outra pergunta é: Como posso dizer ao ssh para usar /home/my-rails-project/.ssh/known_hosts para known_hosts?

Respondendo minha própria pergunta imediatamente acima

Um pouco de pesquisa me levou à resposta em link

Agora minha linha de comando agora parece

ssh -o UserKnownHostsFile=/home/my-rails-project/.ssh/known_hosts -t -v [email protected] sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish

A linha de comando imediatamente acima funciona novamente quando não tenho um sudo na frente dele. Ele falha quando eu uso um sudo na frente dele. A saída detalhada é:

my-rails-project@my-rails-project:~$ sudo ssh -o UserKnownHostsFile=/home/my-rails-project/.ssh/known_hosts -t -v [email protected] sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish
[sudo] password for my-rails-project: 
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.29.205 [192.168.29.205] 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_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.29.205:22 as 'my-rails-project'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
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:EnDsn2kFQgiA56e4B2UuvDr3ajTLlN7/15lxLItnjUQ
debug1: Host '192.168.29.205' is known and matches the ECDSA host key.
debug1: Found key in /home/my-rails-project/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
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: No more authentication methods to try.
Permission denied (publickey).
my-rails-project@my-rails-project:~$ 

E os resultados verbais do sudo e do não-sudo divergem perto do fim da listagem detalhada perto

debug1: Authentications that can continue: publickey
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: No more authentication methods to try.
Permission denied (publickey).
my-rails-project@my-rails-project:~$ 

Pergunta:

Como eu digo ao ssh para usar /home/my-rails-project/.ssh em vez de /root/.ssh para minha chave privada e ainda ser sudo no sistema de destino?

Respondendo a minha pergunta imediatamente acima:

Analisando o link

Então agora a linha de comando ssh é (adicionando uma opção -i )

ssh -o UserKnownHostsFile=/home/my-rails-project/.ssh/known_hosts -i /home/my-rails-project/.ssh/id_rsa -t -v [email protected] sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish

E então eu tenho sucesso, exceto que alguma coisa (ssh?) está pedindo uma senha. A saída agora se parece com:

my-rails-project@my-rails-project:~$ sudo ssh -o UserKnownHostsFile=/home/my-rails-project/.ssh/known_hosts -i /home/my-rails-project/.ssh/id_rsa -t -v [email protected] sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.29.205 [192.168.29.205] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /home/my-rails-project/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/my-rails-project/.ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.29.205:22 as 'my-rails-project'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
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:EnDsn2kFQgiA56e4B2UuvDr3ajTLlN7/15lxLItnjUQ
debug1: Host '192.168.29.205' is known and matches the ECDSA host key.
debug1: Found key in /home/my-rails-project/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/my-rails-project/.ssh/id_rsa
debug1: Server accepts key: pkalg rsa-sha2-512 blen 279
Enter passphrase for key '/home/my-rails-project/.ssh/id_rsa': 
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.29.205 ([192.168.29.205]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending command: sudo /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish

Pergunta:

Eu recebo o seguinte aviso:

Enter passphrase for key '/home/my-rails-project/.ssh/id_rsa': 

Como suprimo essa solicitação de senha?

Eu consegui suprimir a maioria dos pedidos de senhas massificando o /etc/sudoers.d/ralph em ambas as minhas máquinas (Ralph07 e Ralph12)

# This script should only be run on Ralph07
my-rails-project ALL=(ALL:ALL) NOPASSWD: /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12

# This script should only be run on Ralph12
my-rails-project ALL=(ALL:ALL) NOPASSWD: /home/my-rails-project/x/pg_rsync_ralph07_to_ralph12_finish
    
por RalphShnelvar 09.03.2018 / 23:59

1 resposta

1

O prompt 'Digite a frase secreta para a chave' é exibido porque sua chave ssh foi criada com uma frase secreta.

Você pode remover a frase secreta da sua chave ssh com o seguinte:

ssh-keygen -p -N '' -f ~/my-rails-project/.ssh/id_rsa

Ou você pode criar uma nova chave sem uma frase secreta:

ssh-keygen -q -t rsa -b 4096 -N '' -C '' -f ~/my-rails-project/.ssh/id_rsa

Você também pode dar uma olhada na ferramenta sshpass , que pode ser usada para fornecer senhas para comandos ssh, mas não é recomendada, pois abre alguns problemas de segurança.

    
por 10.03.2018 / 01:05