def start_tcpdump_collector(instance_id: int, outdir: str) -> subprocess.Popen:
domid = get_domid_from_instance_id(instance_id)
try:
subprocess.check_output("tcpdump --version", shell=True)
except subprocess.CalledProcessError:
raise RuntimeError("Failed to start tcpdump")
return subprocess.Popen(
["tcpdump", "-i", f"vif{domid}.0-emu", "-w", f"{outdir}/dump.pcap"])
def start_tcpdump_collector(instance_id: str, outdir: str) -> Optional[subprocess.Popen]:
domid = get_domid_from_instance_id(instance_id)
try:
subprocess.check_output("tcpdump --version", shell=True)
except subprocess.CalledProcessError:
logging.warning("Seems like tcpdump is not working/not installed on your system. Pcap will not be recorded.")
return None
return subprocess.Popen([
"tcpdump",
"-i",
f"vif{domid}.0-emu",
"-w",
f"{outdir}/dump.pcap"
])