ngrok / ngrok2 systemd script + config

env.conf

# /lib/systemd/system/ngrok.service.d/env.conf

[Service]
#which tunnel, or all?
Environment="TUNNEL=--all"

#log format
Environment="LOG_FORMAT=logfmt"

#log level
Environment="LOG_LEVEL=info"

#log file
Environment="LOG=/var/log/ngrok.log"

#ngrok2 config file (for tunnels/certs etc.)
Environment="CONFIG=/home/ubuntu/.ngrok2/ngrok.yml"

ngrok.service

# Ubuntu: /lib/systemd/system/ngrok.service
# Config (env.conf) placed in ngrok.service.d will be read automatically
# YMMV on other distributions

[Service]
PrivateTmp=true
Type=simple
StandardOutput=journal
StandardError=journal
ExecStart=/usr/local/bin/ngrok start ${TUNNEL} --log-format ${LOG_FORMAT} --log-level ${LOG_LEVEL} --log ${LOG} --config ${CONFIG}
Restart=always

[Install]
WantedBy=multi-user.target