Public bug reported: ## Environment
Cloud provider: EC2 Distro: Gentoo (Kernel: 4.12.12-gentoo) Version: 17.1 ## Crashes as follows: [ 14.383147] cloud-init[2765]: ------------------------------------------------------------ [ 14.395646] cloud-init[2765]: Traceback (most recent call last): [ 14.407168] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/cmd/main.py", line 638, in status_wrapper [ 14.421615] cloud-init[2765]: ret = functor(name, args) [ 14.429130] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/cmd/main.py", line 357, in main_init [ 14.441136] cloud-init[2765]: init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL)) [ 14.455574] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/stages.py", line 635, in apply_network_config [ 14.470693] cloud-init[2765]: netcfg, src = self._find_networking_config() [ 14.478577] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/stages.py", line 622, in _find_networking_config [ 14.496614] cloud-init[2765]: if self.datasource and hasattr(self.datasource, 'network_config'): [ 14.509144] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/sources/DataSourceEc2.py", line 301, in network_config [ 14.526627] cloud-init[2765]: result = convert_ec2_metadata_network_config(net_md) [ 14.535504] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/sources/DataSourceEc2.py", line 475, in convert_ec2_metadata_network_config [ 14.552604] cloud-init[2765]: macs_to_nics = net.get_interfaces_by_mac() [ 14.560545] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/net/__init__.py", line 522, in get_interfaces_by_mac [ 14.576593] cloud-init[2765]: (name, ret[mac], mac)) [ 14.582105] cloud-init[2765]: RuntimeError: duplicate mac found! both 'gre0' and 'ip_vti0' have mac '00:00:00:00' ## Cause /sys/class/net/*/address varies based on a lower-level protocol used by a interface. https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-net However, cloud-init assumes /sys/class/net/*/address always to be Ethernet MAC address. https://github.com/cloud-init/cloud- init/blob/4964fb38f11c15ed119ff4c7f4379ae3c8785a9a/cloudinit/net/__init__.py#L533 But some interfaces have IPv4/v6 for underlying protocol: $ ip -br l|grep 0.0.0.0 tunl0@NONE DOWN 0.0.0.0 <NOARP> gre0@NONE DOWN 0.0.0.0 <NOARP> ip_vti0@NONE DOWN 0.0.0.0 <NOARP> sit0@NONE DOWN 0.0.0.0 <NOARP> $ ip -br l|grep :: ip6_vti0@NONE DOWN :: <NOARP> ip6tnl0@NONE DOWN :: <NOARP> $ grep -r ^00:00 /sys/class/net/*/address /sys/class/net/gre0/address:00:00:00:00 /sys/class/net/gretap0/address:00:00:00:00:00:00 /sys/class/net/ip6gre0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip6tnl0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip6_vti0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip_vti0/address:00:00:00:00 /sys/class/net/lo/address:00:00:00:00:00:00 /sys/class/net/sit0/address:00:00:00:00 /sys/class/net/tunl0/address:00:00:00:00 These should also be ignored as the empty_mac pattern. ** Affects: cloud-init Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to cloud-init. https://bugs.launchpad.net/bugs/1734989 Title: incorrect duplicate mac error for non-Ethernet based interfaces have empty saddr Status in cloud-init: New Bug description: ## Environment Cloud provider: EC2 Distro: Gentoo (Kernel: 4.12.12-gentoo) Version: 17.1 ## Crashes as follows: [ 14.383147] cloud-init[2765]: ------------------------------------------------------------ [ 14.395646] cloud-init[2765]: Traceback (most recent call last): [ 14.407168] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/cmd/main.py", line 638, in status_wrapper [ 14.421615] cloud-init[2765]: ret = functor(name, args) [ 14.429130] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/cmd/main.py", line 357, in main_init [ 14.441136] cloud-init[2765]: init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL)) [ 14.455574] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/stages.py", line 635, in apply_network_config [ 14.470693] cloud-init[2765]: netcfg, src = self._find_networking_config() [ 14.478577] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/stages.py", line 622, in _find_networking_config [ 14.496614] cloud-init[2765]: if self.datasource and hasattr(self.datasource, 'network_config'): [ 14.509144] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/sources/DataSourceEc2.py", line 301, in network_config [ 14.526627] cloud-init[2765]: result = convert_ec2_metadata_network_config(net_md) [ 14.535504] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/sources/DataSourceEc2.py", line 475, in convert_ec2_metadata_network_config [ 14.552604] cloud-init[2765]: macs_to_nics = net.get_interfaces_by_mac() [ 14.560545] cloud-init[2765]: File "/usr/lib64/python3.4/site-packages/cloudinit/net/__init__.py", line 522, in get_interfaces_by_mac [ 14.576593] cloud-init[2765]: (name, ret[mac], mac)) [ 14.582105] cloud-init[2765]: RuntimeError: duplicate mac found! both 'gre0' and 'ip_vti0' have mac '00:00:00:00' ## Cause /sys/class/net/*/address varies based on a lower-level protocol used by a interface. https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-net However, cloud-init assumes /sys/class/net/*/address always to be Ethernet MAC address. https://github.com/cloud-init/cloud- init/blob/4964fb38f11c15ed119ff4c7f4379ae3c8785a9a/cloudinit/net/__init__.py#L533 But some interfaces have IPv4/v6 for underlying protocol: $ ip -br l|grep 0.0.0.0 tunl0@NONE DOWN 0.0.0.0 <NOARP> gre0@NONE DOWN 0.0.0.0 <NOARP> ip_vti0@NONE DOWN 0.0.0.0 <NOARP> sit0@NONE DOWN 0.0.0.0 <NOARP> $ ip -br l|grep :: ip6_vti0@NONE DOWN :: <NOARP> ip6tnl0@NONE DOWN :: <NOARP> $ grep -r ^00:00 /sys/class/net/*/address /sys/class/net/gre0/address:00:00:00:00 /sys/class/net/gretap0/address:00:00:00:00:00:00 /sys/class/net/ip6gre0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip6tnl0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip6_vti0/address:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 /sys/class/net/ip_vti0/address:00:00:00:00 /sys/class/net/lo/address:00:00:00:00:00:00 /sys/class/net/sit0/address:00:00:00:00 /sys/class/net/tunl0/address:00:00:00:00 These should also be ignored as the empty_mac pattern. 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