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There are different health-monitors in LBaaS:
1) PING 2) TCP 3) HTTP and 4) HTTPS
I was trying PING health-monitor with Haproxy, but it seem to be sending
TCP requests to the members instead of PING requests.
varunlodaya@ubuntu:~$ neutron lb-healthmonitor-show
fb5d0e4b-5763-4f38-bf2c-09f9f7ab2e49
+----------------+-----------------------------------------------------------------------------------------------------+
| Field | Value
|
+----------------+-----------------------------------------------------------------------------------------------------+
| admin_state_up | True
|
| delay | 30
|
| id | fb5d0e4b-5763-4f38-bf2c-09f9f7ab2e49
|
| max_retries | 2
|
| pools | {"status": "ACTIVE", "status_description": null, "pool_id":
"93d03b4e-05a5-4691-b36f-1416b96c3751"} |
| tenant_id | 6d560cf5767d4f17a61ebc11c14bc1cc
|
| timeout | 5
|
| type | PING
|
+----------------+-----------------------------------------------------------------------------------------------------+
The Haproxy config it generates for backend is:
*********
backend 93d03b4e-05a5-4691-b36f-1416b96c3751
mode http
balance roundrobin
option forwardfor
timeout check 5s
server 07285f2e-9e9f-41ad-a343-2f1d7296f2d9 10.0.0.4:80 weight 1 check
inter 30s fall 2
On the member, I opened tcpdump to check whats being received:
sudo tcpdump -i eth0 -v icmp
sudo: unable to resolve host ubuntu-vm
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
ubuntu@ubuntu-vm:~$ sudo tcpdump -i eth0 -n src host 10.0.0.5 -vv
sudo: unable to resolve host ubuntu-vm
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
bytes
23:03:53.434592 IP (tos 0x0, ttl 64, id 4614, offset 0, flags [DF], proto TCP
(6), length 60)
10.0.0.5.55697 > 10.0.0.4.80: Flags [S], cksum 0xc228 (correct), seq
3491668946, win 29200, options [mss 1460,sackOK,TS val 1552852 ecr 0,nop,wscale
7], length 0
23:03:58.441968 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.0.4
tell 10.0.0.5, length 28
23:04:23.439097 IP (tos 0x0, ttl 64, id 30112, offset 0, flags [DF], proto TCP
(6), length 60)
10.0.0.5.55704 > 10.0.0.4.80: Flags [S], cksum 0x3862 (correct), seq
635615873, win 29200, options [mss 1460,sackOK,TS val 1560353 ecr 0,nop,wscale
7], length 0
^C
3 packets captured
3 packets received by filter
0 packets dropped by kernel
** Affects: neutron
Importance: Undecided
Status: New
** Tags: lbaas
--
PING health-monitor in LBaaS Haproxy sends a TCP request to members
https://bugs.launchpad.net/bugs/1426151
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