2020-02-20 07:36:41.632 12 ERROR neutron.agent.linux.iptables_manager [-] IPTablesManager.apply failed to apply the following set of iptables rules:
      1. # Generated by iptables_manager
      2. *filter
      3. :FORWARD - [0:0]
      4. :INPUT - [0:0]
      5. :OUTPUT - [0:0]
      6. :neutron-filter-top - [0:0]
      7. :neutron-l3-agent-FORWARD - [0:0]
      8. :neutron-l3-agent-INPUT - [0:0]
      9. :neutron-l3-agent-OUTPUT - [0:0]
     10. :neutron-l3-agent-local - [0:0]
     11. :neutron-l3-agent-scope - [0:0]
     12. -I FORWARD 1 -j neutron-filter-top
     13. -I FORWARD 2 -j neutron-l3-agent-FORWARD
     14. -I INPUT 1 -j neutron-l3-agent-INPUT
     15. -I OUTPUT 1 -j neutron-filter-top
     16. -I OUTPUT 2 -j neutron-l3-agent-OUTPUT
     17. -I neutron-filter-top 1 -j neutron-l3-agent-local
     18. -I neutron-l3-agent-FORWARD 1 -j neutron-l3-agent-scope
     19. COMMIT
     20. # Completed by iptables_manager
     21. # Generated by iptables_manager
     22. *mangle
     23. :FORWARD - [0:0]
     24. :INPUT - [0:0]
     25. :OUTPUT - [0:0]
     26. :POSTROUTING - [0:0]
     27. :PREROUTING - [0:0]
     28. :neutron-l3-agent-FORWARD - [0:0]
     29. :neutron-l3-agent-INPUT - [0:0]
     30. :neutron-l3-agent-OUTPUT - [0:0]
     31. :neutron-l3-agent-POSTROUTING - [0:0]
     32. :neutron-l3-agent-PREROUTING - [0:0]
     33. :neutron-l3-agent-float-snat - [0:0]
     34. :neutron-l3-agent-floatingip - [0:0]
     35. :neutron-l3-agent-mark - [0:0]
     36. :neutron-l3-agent-scope - [0:0]
     37. -I FORWARD 1 -j neutron-l3-agent-FORWARD
     38. -I INPUT 1 -j neutron-l3-agent-INPUT
     39. -I OUTPUT 1 -j neutron-l3-agent-OUTPUT
     40. -I POSTROUTING 1 -j neutron-l3-agent-POSTROUTING
     41. -I PREROUTING 1 -j neutron-l3-agent-PREROUTING
     42. -I neutron-l3-agent-POSTROUTING 1 -o qg-98229976-3b -m connmark --mark 0x0/0xffff0000 -j CONNMARK --save-mark --nfmask 0xffff0000 --ctmask 0xffff0000
     43. -I neutron-l3-agent-PREROUTING 1 -j neutron-l3-agent-mark
     44. -I neutron-l3-agent-PREROUTING 2 -j neutron-l3-agent-scope
     45. -I neutron-l3-agent-PREROUTING 3 -m connmark ! --mark 0x0/0xffff0000 -j CONNMARK --restore-mark --nfmask 0xffff0000 --ctmask 0xffff0000
     46. -I neutron-l3-agent-PREROUTING 4 -j neutron-l3-agent-floatingip
     47. -I neutron-l3-agent-PREROUTING 5 -d 169.254.169.254/32 -i qr-+ -p tcp -m tcp --dport 80 -j MARK --set-xmark 0x1/0xffff
     48. -I neutron-l3-agent-float-snat 1 -m connmark --mark 0x0/0xffff0000 -j CONNMARK --save-mark --nfmask 0xffff0000 --ctmask 0xffff0000
     49. -I neutron-l3-agent-mark 1 -i qg-98229976-3b -j MARK --set-xmark 0x2/0xffff
     50. COMMIT
     51. # Completed by iptables_manager
     52. # Generated by iptables_manager
     53. *nat
     54. :OUTPUT - [0:0]
     55. :POSTROUTING - [0:0]
     56. :PREROUTING - [0:0]
     57. :neutron-l3-agent-OUTPUT - [0:0]
     58. :neutron-l3-agent-POSTROUTING - [0:0]
     59. :neutron-l3-agent-PREROUTING - [0:0]
     60. :neutron-l3-agent-float-snat - [0:0]
     61. :neutron-l3-agent-snat - [0:0]
     62. :neutron-postrouting-bottom - [0:0]     
     63. -I OUTPUT 1 -j neutron-l3-agent-OUTPUT
     64. -I POSTROUTING 1 -j neutron-l3-agent-POSTROUTING
     65. -I POSTROUTING 2 -j neutron-postrouting-bottom
     66. -I PREROUTING 1 -j neutron-l3-agent-PREROUTING
     67. -I neutron-l3-agent-POSTROUTING 1 ! -o qg-98229976-3b -m conntrack ! --ctstate DNAT -j ACCEPT
     68. -I neutron-l3-agent-snat 1 -j neutron-l3-agent-float-snat
     69. -I neutron-l3-agent-snat 2 -o qg-98229976-3b -j SNAT --to-source 10.101.134.162 --random-fully
     70. -I neutron-l3-agent-snat 3 -m mark ! --mark 0x2/0xffff -m conntrack --ctstate DNAT -j SNAT --to-source 10.101.134.162 --random-fully
     71. -I neutron-postrouting-bottom 1 -m comment --comment "Perform source NAT on outgoing traffic." -j neutron-l3-agent-snat
     72. COMMIT
     73. # Completed by iptables_manager
     74. # Generated by iptables_manager
     75. *raw
     76. :OUTPUT - [0:0]
     77. :PREROUTING - [0:0]
     78. :neutron-l3-agent-OUTPUT - [0:0]
     79. :neutron-l3-agent-PREROUTING - [0:0]
     80. -I OUTPUT 1 -j neutron-l3-agent-OUTPUT
     81. -I PREROUTING 1 -j neutron-l3-agent-PREROUTING
     82. COMMIT
     83. # Completed by iptables_manager
     84.


; Stdout: ; Stderr: iptables-restore v1.8.2 (nf_tables):
line 53: CHAIN_ADD failed (Device or resource busy): chain PREROUTING
line 53: CHAIN_ADD failed (Device or resource busy): chain INPUT
line 53: CHAIN_ADD failed (Device or resource busy): chain POSTROUTING
line 53: CHAIN_ADD failed (Device or resource busy): chain OUTPUT
line 63: RULE_INSERT failed (No such file or directory): rule in chain OUTPUT
line 64: RULE_INSERT failed (No such file or directory): rule in chain POSTROUTING
line 65: RULE_APPEND failed (No such file or directory): rule in chain POSTROUTING
line 66: RULE_INSERT failed (No such file or directory): rule in chain PREROUTING