def dump_pcap_on_host(self, pcapfile, timeout=5):
"""
Does tcpdump to a pcap file for "n" seconds on the host veth device
corresponding to the eth0 interface inside the docker container.
"""
veth_index = self.run(
"cat /sys/class/net/eth0/iflink")[1].strip()
veth = self.run_from_root(
"grep -l " + veth_index + " /sys/class/net/veth*/ifindex")[1].split("/")[4]
run_cmd("timeout " + str(timeout) + " tcpdump -nn -A -i " + veth + " -w test/trn_func_tests/output/" +
self.ip + "_" + pcapfile + "_dump.pcap >/dev/null 2>&1 &")
def local(self, cmd):
ret_value = None
logger.info("[LOCAL {}]: running: {}".format(self.id, cmd))
try:
out = run_cmd(cmd)
ret_value = (out[0], out[1])
if (ret_value[0] != 0):
logger.error("[LOCAL {}]: {}".format(self.id, ret_value[1]))
logger.debug(
"[LOCAL {}]: running\n command:\n {}, \n exit_code: {},\n output:\n {}"
.format(self.id, cmd, ret_value[0], ret_value[1]))
return ret_value
except Exception as e:
logger.error("[LOCAL {}]: {}".format(self.id, str(e)))
return None
def run_from_root(self, cmd):
ret_value = run_cmd(cmd)
logger.debug(
"[DROPLET {}]: running from root\n command:\n {}, \n exit_code: {},\n output:\n {}"
.format(self.id, cmd, ret_value[0], ret_value[1]))
return ret_value