SSH watcher

How to use

Have you ever had issues trying to port-forward ssh connection to your device? Did you have to set up the connection again when device reboots? This tool might be for you. This tool tries to keep ssh connections to devices alive. Useful when your chroot does not have complicated set up available outside of your chroot, and your DUT is not available directly via ssh.

To run:

$ go run sshwatcher.go host port host port host port

to keep ssh connection to host with local port forwarded to port 22.

An example:

go run sshwatcher.go cheeps 2226 eve 2227 kukui 2228 rammus 2229

Your ssh config needs to be set up such that interactive password input is not always required. For DUTs this means use of testing_rsa key. See https://chromium.googlesource.com/chromiumos/docs/+/HEAD/tips-and-tricks.md#how-to-avoid-typing-test0000-or-any-password-on-ssh_ing-to-your-device

Outside of your chroot you will be using a .ssh/config like

host your-dut-name
    HostName [your complex config comes here]
    ProxyCommand [your extra complex config comes here]
    ControlMaster auto
    ControlPersist 3600
    ControlPath ~/tmp/ssh-%r@%h:%p
    ServerAliveCountMax 10
    ServerAliveInterval 1
    VerifyHostKeyDNS no
    CheckHostIP no
    UserKnownHostsFile /dev/null
    Compression yes
    IdentityFile ~/.ssh/testing_rsa

Inside of your chroot you will be using:

ssh localhost -p xxxx