All CLA requirements met.

@gord1306 I think you have a great idea here. But I am a bit worried that prefixing the vm set name might cause interface name to exceed 15-char Linux limit. Is there a way to get something unique but short?

. But I am a bit worried that prefixing the vm set name might cause interface name to exceed 15-char Linux limit. Is there a way to get something unique but short?

@yxieca , yes, it indeed a problem, I am also thinking about this issue, maybe shorten to a random value by hash.

. But I am a bit worried that prefixing the vm set name might cause interface name to exceed 15-char Linux limit. Is there a way to get something unique but short?

@yxieca , yes, it indeed a problem, I am also thinking about this issue, maybe shorten to a random value by hash.

Yes. You might be able to use system generated tmp file name for this purpose. The key is to make it random but unique.

retest this please

retest this please

retest this please
The test result is failed.

fatal: [STR-ACS-VSERV-01]: FAILED! => {"changed": false, "msg": "ret_code=1, error message=b'Cannot find device \"ddd8c3mgmt\"\\n'. cmd=nsenter -t 475823 -n ip link set ddd8c3mgmt up"}

It looks likes the mgmt interface not found in the ptf container. But it's strange, my source doesn't set up the netdev with prefix in the ptf container, only up the netdev without prefix

It looks likes the mgmt interface not found in the ptf container. But it's strange, my source doesn't set up the netdev with prefix in the ptf container, only up the netdev without prefix

It looks like there is a hidden issue in this change. Could you fix it?

It looks likes the mgmt interface not found in the ptf container. But it's strange, my source doesn't set up the netdev with prefix in the ptf container, only up the netdev without prefix

It looks like there is a hidden issue in this change. Could you fix it?

I observed the testing log seems not remove topology every time, it means the PTF container may already have the mgmt interface. Therefore, I updated the commit, and add one condition check to ignore if the mgmt interface already exists in the PTF container

        if MGMT_PORT_NAME not in self.cntr_ifaces:
            tmp_mgmt_if = hashlib.md5((PTF_NAME_TEMPLATE % self.vm_set_name).encode("utf-8")).hexdigest()[0:6] + MGMT_PORT_NAME
            self.add_br_if_to_docker(mgmt_bridge, PTF_MGMT_IF_TEMPLATE % self.vm_set_name, tmp_mgmt_if)

The new testing result is passed