[Unit]
Description=ePPing - Passive monitoring of network RTTs on %i
After=network.service
Wants=rotate-pping@%i.timer

# Uncomment below if running with LibreQoS
# After=lqosd.service

[Service]
# Ensure folder for saving output to exists
ExecStartPre=/usr/bin/mkdir -p /var/log/pping/%i

# Rotate any old output first to ensure ePPing can start writing to its intended file
ExecStartPre=/opt/bpf-examples/pping/scripts/rotate-pping-output.sh /var/log/pping/%i/pping.%i.json

WorkingDirectory=/opt/bpf-examples/pping
ExecStart=/opt/bpf-examples/pping/pping -i %i -l -r 10 -a 10 -F json -w /var/log/pping/%i/pping.%i.json

# On systemctl reload, send a SIGHUP to ePPing which causes it to reopen its output file
ExecReload=kill -HUP $MAINPID

Restart=on-failure
RestartSec=60

# Set to whatever maximum memory footprint you can tolerate
# Note, hard-kills the ePPing process without allowing it to clean up. Consider
# running /scripts/cleanup-tc-progs after.
MemoryMax=4G

[Install]
WantedBy=default.target