systemd service to port forward service

port-tunnel.service

[Unit]
Description=Setup a secure tunnel to a local API port on another server named my-other-server in ssh config
After=network-online.target

[Service]
SyslogIdentifier="my-api-tunnel"
ExecStartPre=/bin/sh -c "/usr/bin/ssh -O exit my-other-service; true"
ExecStop=/bin/sh -c "/usr/bin/ssh -O exit my-other-service; true"
ExecStart=/usr/bin/ssh -NT -o LogLevel=ERROR -o ServerAliveInterval=60 -o ExitOnForwardFailure=yes -L 8000:localhost:8000 my-other-service

# Restart every >2 seconds to avoid StartLimitInterval failure
RestartSec=5
Restart=always

[Install]
WantedBy=multi-user.target