{{tag>Brouillon Pb Ansible SSH sftp}}

= Pb Ansible - sftp transfer mechanism failed


=== Warn - sftp transfer mechanism failed


==== Connexion distante

<code ->
$ ansible -m ping -i inv.lst -u root srv1
[WARNING]: sftp transfer mechanism failed on [srv1]. Use ANSIBLE_DEBUG=1 to see detailed information
srv1 | SUCCESS => {
    "changed": false,
    "ping": "pong"
}
</code>

<code ->
$ sftp root@srv1
subsystem request failed on channel 0
Connection closed
</code>


==== Sur la cible

<code ->
# tail -f /var/log/messages>
Aug  7 10:25:19 srv1 sshd[30049]: Accepted publickey for root from 192.168.1.22 port 45878 ssh2
Aug  7 10:25:19 srv1 sshd[30051]: subsystem request for sftp
Aug  7 10:25:19 srv1 sshd[30051]: error: subsystem: cannot stat /usr/sbin/sftp-server: No such file or directory
Aug  7 10:25:19 srv1 sshd[30051]: subsystem request for sftp failed, subsystem not found
</code>

<code ->
# grep sftp /etc/ssh/sshd_config
Subsystem       sftp    /usr/libexec/openssh/sftp-server
</code>


==== Solution

Sur la cible
<code bash>
ln -s /usr/libexec/openssh/sftp-server /usr/sbin/sftp-server
</code>

Ou

''/etc/ssh/sshd_config''
<code ->
#Subsystem sftp /usr/libexec/openssh/sftp-server
Subsystem sftp internal-sftp
</code>

<code bash>
systemctl restart sshd
</code>

Ou
<code ini>
alias ansible_host=192.168.1.102 ansible_ssh_transfer_method=scp
</code>

Ou

''ansible.cfg''
<code ini>
[ssh_connection]
# Control the mechanism for transferring files (old)
#   * smart = try sftp and then try scp [default]
#   * True = use scp only
#   * False = use sftp only
#scp_if_ssh = smart

# Control the mechanism for transferring files (new)
# If set, this will override the scp_if_ssh option
#   * sftp  = use sftp to transfer files
#   * scp   = use scp to transfer files
#   * piped = use 'dd' over SSH to transfer files
#   * smart = try sftp, scp, and piped, in that order [default]
#transfer_method = smart
</code>