SSH config location

[Glideh]

For people like me that mostly need SFTP repos, it's cool to be able to configure the SSH config in one file, so we just need to set the sftp:host:target repo URI at creation.

Example

• Create a ssh directory

mkdir ./ssh

• Create the ssh/config file

Host host
    Hostname truc.chouette.fr
    Port 12345
    User me

• Generate the known_hosts

ssh-keyscan -H -p 12345 truc.chouette.fr > ./ssh/known_hosts

• Create a key

ssh-keygen -f ./ssh/id_rsa

• Set the expected permissions

chmod 700 ./ssh
chmod 600 ./ssh/*
sudo chown -R root:root ./ssh/

• Mount the directory at the default location

compose.yml

services:
  backrest:
#...
    volumes:
#...
      - ./ssh:/root/.ssh

• Now we can create a repo with just sftp:host:target as URI

Maybe this would deserve a README section, what do you think ?

[garethgeorge]

Definitely worth a README section or perhaps a cookbook at https://garethgeorge.github.io/backrest/cookbooks/

Writing up more docs is solidly on my todo list -- any contributions here are also very welcome! SSH configuration is perhaps one of the most asked about issues and definitely deserves some working examples.

[Glideh]

I can do I PR if needed