In response to this:

• add skb_free tracepoint hook

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

• add skb_free tracepoint hook
  to view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

inspired by https://www.brendangregg.com/blog/2018-05-31/linux-tcpdrop.html

• add skb_free tracepoint hook
  to view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

Add skb_free tracepoint hook to detect when TCP flows are dropped and update flow metrics with tcp socket info.

To view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

For reference about tcpdrop https://www.brendangregg.com/blog/2018-05-31/linux-tcpdrop.html

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

• Add skb_free tracepoint hook to detect when TCP flows are dropped and update flow metrics with tcp socket info.

• To view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

• For reference about tcpdrop https://www.brendangregg.com/blog/2018-05-31/linux-tcpdrop.html

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

• Add skb_free tracepoint hook to detect when TCP flows are dropped and update flow metrics with tcp socket info.

• To view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

• For reference about tcpdrop https://www.brendangregg.com/blog/2018-05-31/linux-tcpdrop.html

• Steps for manual testing using flowsdump collector tool

using ncat
=========
server ncat -l 8080
client ncat 192.168.122.69 8080


use iptables rule to drop
============================
sudo iptables -I INPUT 1 -m tcp --proto tcp --dst 192.168.122.69/32 --dport 8080 -j DROP
switch back
sudo iptables -I INPUT 1 -m tcp --proto tcp --dst 192.168.122.69/32 --dport 8080 -j ACCEPT

run local flow collector with long time to allow flow to stay longer (2Minutes)
===============================================================================
sudo FLOWS_TARGET_HOST=127.0.0.1 FLOWS_TARGET_PORT=9999 CACHE_ACTIVE_TIMEOUT="120s" ./bin/netobserv-ebpf-agent


use bpftool to find the map and dump it
=======================================
sudo bpftool map list
sudo bpftool map dump id 500 | grep dst_port

use bpftool to look at prog traces
=================================
sudo bpftool prog tracelog

use bpftool to check tracepoint is attached
===========================================
bpftool perf show

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

In response to this:

• Add skb_free tracepoint hook to detect when TCP flows are dropped and update flow metrics with tcp socket info.

• To view ebpf tracepoints with bpftool

bpftool perf show
pid 119418  fd 8: prog_id 134  tracepoint  kfree_skb

• For reference about tcpdrop https://www.brendangregg.com/blog/2018-05-31/linux-tcpdrop.html

• Steps for manual testing using flowsdump collector tool

using ncat
=========
server ncat -l 8080
client ncat 192.168.122.69 8080


use iptables rule to drop
============================
sudo iptables -I INPUT 1 -m tcp --proto tcp --dst 192.168.122.69/32 --dport 8080 -j DROP
switch back
sudo iptables -I INPUT 1 -m tcp --proto tcp --dst 192.168.122.69/32 --dport 8080 -j ACCEPT

run local flow collector with long time to allow flow to stay longer (2Minutes)
===============================================================================
sudo FLOWS_TARGET_HOST=127.0.0.1 FLOWS_TARGET_PORT=9999 CACHE_ACTIVE_TIMEOUT="120s" ./bin/netobserv-ebpf-agent


use bpftool to find the map and dump it
=======================================
sudo bpftool map list
sudo bpftool map dump id 500 | grep dst_port

use bpftool to look at prog traces
=================================
sudo bpftool prog tracelog

use bpftool to check tracepoint is attached
===========================================
bpftool perf show

once the drop iptable rule is installed we can see tcpdrop stats been updated

},{
               "cpu": 10,
               "value": {
                   "packets": 7,
                   "bytes": 540,
                   "start_mono_time_ts": 1047585604832,
                   "end_mono_time_ts": 1054159237862,
                   "flags": 16,
                   "errno": 0,
                   "tcp_drops": {
                       "packets": 7,
                       "bytes": 442,
                       "flags": 16,
                       "state": 1
                   }
               }

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

• OWNERS [msherif1234]

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