No tap device found for nic 0 ExitCode: 1

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1

Thu Apr 24 10:19:41 2025: DEPLOY: ovswitch: INFO: post: >>>>>>>>>>>>>>>>>>>>>>>>>>>> NIC Details : {:ar_id=>“0”, :bridge=>“private”, :bridge_type=>“openvswitch”, :cluster_id=>“0”, :filter_ip_spoofing=>“YES”, :filter_mac_spoofing=>“YES”, :ip=>“172.16.239.7”, :mac=>“02:00:ac:10:ef:07”, :metric=>“10”, :name=>“NIC0”, :network=>“hydra-private”, :network_id=>“0”, :network_uname=>“oneadmin”, :nic_id=>“0”, :security_groups=>“0”, :target=>“one-5-0”, :vn_mad=>“ovswitch”, :conf=>{:validate_vlan_id=>false, :arp_cache_poisoning=>true, :datastore_location=>“/var/lib/one/datastores”, :vlan_mtu=>1500, :vxlan_mode=>“multicast”, :vxlan_mc=>“239.0.0.0”, :vxlan_ttl=>16, :vxlan_mtu=>1500, :vxlan_tep=>“dev”, :ipset_maxelem=>65536, :keep_empty_bridge=>false}, :bridge_conf=>{}, :ovs_bridge_conf=>{}, :ip_link_conf=>{}} =================================== No tap device found for nic 0 ExitCode: 1

Vm is runnning fine also can able ping and ssh but i am getting this issue.

Suggest to fix this

2

Hello @Senthil_Kumar_M,

This error indicates that the Open vSwitch (OVS) bridge isn’t properly set up or the tap device isn’t being created as expected.

Please check the following steps:

  • Verify OVS Bridge Configuration: Review if the OVS Bridge specified in your VM Network Configuration exists.
  • Check Physical Interface Association: In case you need it, replace eth0 with your actual physical interface name.
  • Inspect VM Network Configuration
  • Restart Networking Services

Check logs in case still doesn’t work, to help us to review the issue:

  • OpenNebula logs: /var/log/one/oned.log
  • Libvirt logs: /var/log/libvirt/libvirtd.log
  • Also, the output of sudo ovs-vsctl show could be useful

Cheers