Create persistent ssh tunnels via autossh (Centos7)

ssh_tunnel_client_user - default is ssh_tunnel

ssh_tunnels - array with keys:

• name - name used for naming services
• key_file - priv ssh key
• target_host - required
• target_port - required
• local_port - required
• remote_user - set to ssh_tunnel by default
• alive_interval - set to 10 by default
• alive_count_max - set to 1 by default

Warning

Autossh binds to a monitoring port on the remote machine. A fixed port is used and multiple clients cannot not bind to the same port at the same time what causes the ssh session to be restarted every 10 minutes.

The port randomization does not work in latest centos 7 version (1.4e) as of this writing.

That's why the autossh monitoring is turned off.

Even without the monitoring it should work fine, because ssh exits quickly when there is no connection thanks to -oServerAliveInterval=60 -oServerAliveCountMax=2 options.

For more info see: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=351162

Sidenote: Upon consideration, why do I need autossh then? Won't systemd take care of the restarting?