[Feature Request] kubectl-ko: add option --ovs to ovn-trace subcommand

[zhangzujian]

Description

Similar to subcommand ovn-trace, but:

1. Run ovn-trace on the node where the trace target is running;
2. Add ovn-trace option --db=tcp:[SB_LEADER_IP]:6642 to connect to the sb database;
3. Add ovn-trace option --ovs to display the OpenFlow flows that correspond to each OVN logical flow.

Example display:

$ kubectl ko ovn-trace --ovs kube-system/kube-ovn-pinger-8k2h7 10.16.0.1 icmp
Using the logical gateway mac address as destination
+ kubectl exec ovn-central-6845747f5b-sfbvp -n kube-system -c ovn-central -- ovn-trace --db=tcp:[172.18.0.3]:6642 --ovs ovn-default 'inport == "kube-ovn-pinger-8k2h7.kube-system" && ip.ttl == 64 && icmp && eth.src == 02:33:03:14:b1:cc && ip4.src == 10.16.0.9 && eth.dst == 36:fc:f7:35:6e:73 && ip4.dst == 10.16.0.1 && ct.new'
# ct_state=new|trk,icmp,reg14=0x9,vlan_tci=0x0000,dl_src=02:33:03:14:b1:cc,dl_dst=36:fc:f7:35:6e:73,nw_src=10.16.0.9,nw_dst=10.16.0.1,nw_tos=0,nw_ecn=0,nw_ttl=64,nw_frag=no,icmp_type=0,icmp_code=0

ingress(dp="ovn-default", inport="kube-ovn-pinger-8k2h7.kube-system")
---------------------------------------------------------------------
 0. ls_in_check_port_sec (northd.c:8991): 1, priority 50, uuid 16a8f8f4
    cookie=0x16a8f8f4, duration=20949.186s, table=8, n_packets=28368, n_bytes=1858870, idle_age=2, priority=50,metadata=0x2 actions=set_field:0/0x1000->reg10,resubmit(,74),move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111],resubmit(,9)
    cookie=0x16a8f8f4, duration=20869.971s, table=8, n_packets=152, n_bytes=9592, idle_age=781, priority=50,metadata=0x4 actions=set_field:0/0x1000->reg10,resubmit(,74),move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111],resubmit(,9)
    cookie=0x16a8f8f4, duration=20886.921s, table=8, n_packets=22625, n_bytes=1480724, idle_age=1, priority=50,metadata=0x5 actions=set_field:0/0x1000->reg10,resubmit(,74),move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111],resubmit(,9)
    cookie=0x16a8f8f4, duration=20949.184s, table=8, n_packets=149240, n_bytes=13030095, idle_age=3, priority=50,metadata=0x3 actions=set_field:0/0x1000->reg10,resubmit(,74),move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111],resubmit(,9)
    reg0[15] = check_in_port_sec();
    next;
 5. ls_in_pre_lb (northd.c:6231): ip, priority 100, uuid 4d861d97
    cookie=0x4d861d97, duration=20946.240s, table=13, n_packets=0, n_bytes=0, idle_age=20946, priority=100,ipv6,metadata=0x3 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    cookie=0x4d861d97, duration=20869.969s, table=13, n_packets=70, n_bytes=4620, idle_age=19395, priority=100,ip,metadata=0x4 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    cookie=0x4d861d97, duration=20869.969s, table=13, n_packets=0, n_bytes=0, idle_age=20869, priority=100,ipv6,metadata=0x4 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    cookie=0x4d861d97, duration=20886.919s, table=13, n_packets=22075, n_bytes=1456950, idle_age=1, priority=100,ip,metadata=0x5 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    cookie=0x4d861d97, duration=20886.919s, table=13, n_packets=0, n_bytes=0, idle_age=20886, priority=100,ipv6,metadata=0x5 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    cookie=0x4d861d97, duration=20946.240s, table=13, n_packets=148638, n_bytes=13004027, idle_age=3, priority=100,ip,metadata=0x3 actions=set_field:0x4000000000000000000000000/0x4000000000000000000000000->xxreg0,resubmit(,14)
    reg0[2] = 1;
    next;
...

Who will benefit from this feature?

No response

Anything else?

No response