How to use socat with haproxy stat

How to use socat with haproxy stat

*** Introduction –

All you know about the haproxy, that its the one of the good opensource load balancing software and to check the fun stats of haproxy here we using ‘socat’ – Multipurpose relay (SOcket CAT)


* What is socat?

Socat  is  a  command  line based utility that establishes two bidirectional byte streams and transfers data between them. Because the streams can be constructed from a large set of different types of data sinks and sources (see address  types),  and  because  lots  of address options may be applied to the streams, socat can be used for many different purposes. (see more info at ‘man socat’ 🙂 or at http://www.dest-unreach.org/socat/)
* How to use ‘socat’ with haproxy stat

Step 1) Download ‘socat’ from http://www.dest-unreach.org/socat/download/  latest version ~ “socat-2.0.0-b3.tar.gz”

ravi@arun:~$ wget http://www.dest-unreach.org/socat/download/socat-1.7.1.2.tar.gz

ravi@arun:~$ tar xvzf socat-1.7.1.2.tar.gz

ravi@arun:~$ cd socat-1.7.1.2

NOTE ~ No need to install the ‘fipsld’ package if you got the below msg after running the ‘make’ just following steps for

compiling socat….

FIPSLD_CC=gcc fipsld -O -D_GNU_SOURCE -Wall -Wno-parentheses  -DHAVE_CONFIG_H -I.  -I.   -c -o socat.o socat.c
/bin/sh: fipsld: command not found
make: *** [socat.o] Error 127

ravi@arun:~$ ./configure –disable-fips
ravi@arun:~$ make

To install it login as root
ravi@arun:~$ su –

ravi@arun:~# make install

Step 2) Now you need to add stats socket PATH in Haproxy configuration and restart haproxy as per shown in following example,

where I have added it under in ‘global’ setting –

ravi@arun:~# more /etc/haproxy/myhaproxy.cfg

#———–Start of haproxy Config file————–
global
log 127.0.0.1   local0
log 127.0.0.1   local1 notice
#log loghost    local0 info
maxconn 25000
#debug
#quiet
user ravi
group ravi
stats socket    /tmp/haproxy
defaults
option          contstats
timeout         connect 5s
timeout         client 25s
timeout         server 25s
maxconn         100

listen ravitestbed      0.0.0.0:80 ##ravi.com IP
mode            tcp
balance         roundrobin
server          web1 192.168.19.117
server          web2 192.168.19.122

listen stats
bind            0.0.0.0:8081
mode            http
#stats          uri /stat  #Comment this if you need to specify diff stat path for viewing stat page
stats enable
stats auth admin:admin ##Auth user pass

#———–End of haproxy Config file————–

Step 3) Used /tmp/haproxy. Now you can send the commands to get stats from HAProxy –

Now time to use socat

ravi@arun:~# echo “”  | socat unix-connect:/tmp/haproxy stdio
Unknown command. Please enter one of the following commands only :
show info   : report information about the running process
show stat   : report counters for each proxy and server
show errors : report last request and response errors for each proxy
show sess   : report the list of current sessions

This will dump (possibly huge) info about all know sessions.

ravi@arun:~$ echo “show sess” | socat unix-connect:/tmp/haproxy stdio
0x9ee3520: proto=tcpv4 src=192.168.19.117:4721 fe=ravitestbed be=ravitestbed srv=arun as=0 ts=08 age=4s calls=3
rq[f=009202h,l=0,an=00h,rx=20s,wx=,ax=] rp[f=009202h,l=0,an=00h,rx=20s,wx=,ax=] s0=[7,8h,fd=1,ex=] s1=[7,8h,fd=2,ex=] exp=20s
0x9eeb8e8: proto=tcpv4 src=192.168.19.117:4723 fe=ravitestbed be=ravitestbed srv=arun as=0 ts=08 age=4s calls=3
rq[f=009000h,l=0,an=00h,rx=20s,wx=,ax=] rp[f=009202h,l=0,an=00h,rx=20s,wx=,ax=] s0=[7,8h,fd=8,ex=] s1=[7,8h,fd=9,ex=] exp=20s
0x9ef3d08: proto=tcpv4 src=192.168.19.117:4725 fe=ravitestbed be=ravitestbed srv=arun as=0 ts=08 age=4s calls=3
rq[f=009000h,l=0,an=00h,rx=20s,wx=,ax=] rp[f=009202h,l=0,an=00h,rx=20s,wx=,ax=] s0=[7,8h,fd=12,ex=] s1=[7,8h,fd=13,ex=]
exp=20s
0x9f04548: proto=unix_stream as=2 ts=09 age=0s calls=2 rq[f=00e042h,l=10,an=20h,rx=10s,wx=,ax=]

rp[f=048060h,l=716,an=00h,rx=,wx=10s,ax=] s0=[7,0h,fd=3,ex=] s1=[0,0h,fd=-1,ex=] exp=9s

This will give you information about the running HAProxy process such as pid, uptime and etc.

ravi@arun:~$ echo “show info” | socat unix-connect:/tmp/haproxy stdio
Name: HAProxy
Version: 1.3.23
Release_date: 2010/01/28
Nbproc: 1
Process_num: 1
Pid: 11829
Uptime: 0d 0h42m53s
Uptime_sec: 2573
Memmax_MB: 0
Ulimit-n: 50013
Maxsock: 50013
Maxconn: 25000
Maxpipes: 0
CurrConns: 1
PipesUsed: 0
PipesFree: 0
Tasks: 1
Run_queue: 1
node: ravi.world
description:

This will give you stats on all of your backends and frontends, some of the same stuff you see on the stats page enabled by the stats uri configuration. As an added bonus it’s all in CSV.

ravi@arun:~$ echo “show stat” | socat unix-connect:/tmp/haproxy stdio
#
pxname,svname,qcur,qmax,scur,smax,slim,stot,bin,bout,dreq,dresp,ereq,econ,eresp,wretr,wredis,status,weight,act,bck,chkfail,ch
kdown,lastchg,downtime,qlimit,pid,iid,sid,throttle,lbtot,tracked,type,rate,rate_lim,rate_max,
ravitestbed,FRONTEND,,,0,5,100,30,32582,50616,0,0,0,,,,,OPEN,,,,,,,,,1,1,0,,,,0,0,0,5,
ravitestbed,trupti,0,0,0,2,,15,7020,22722,,0,,0,0,0,0,no check,1,1,0,,,,,,1,1,1,,15,,2,0,,2,
ravitestbed,arun,0,0,0,5,,15,25562,27894,,0,,0,0,0,0,no check,1,1,0,,,,,,1,1,2,,15,,2,0,,3,
ravitestbed,BACKEND,0,0,0,5,100,30,32582,50616,0,0,,0,0,0,0,UP,2,2,0,,0,2710,0,,1,1,0,,30,,1,0,,5,
stats,FRONTEND,,,0,1,100,21,9605,152357,0,0,0,,,,,OPEN,,,,,,,,,1,2,0,,,,0,0,0,9,
stats,BACKEND,0,0,0,1,100,5,9605,152357,0,0,,5,0,0,0,UP,0,0,0,,0,2710,0,,1,2,0,,0,,1,0,,4,

show errors will give you a capture of last error on each backend/frontend.

ravi@arun:~$ echo “show errors” | socat unix-connect:/tmp/haproxy stdio

Reffer:
http://www.dest-unreach.org/socat/
http://haproxy.1wt.eu/download/1.3/doc/configuration.txt

Thanks to Joe (http://www.joeandmotorboat.com)

Thank you,
Ravi

Similar Posts:

Be Sociable, Share!

Leave a Reply

Your email address will not be published. Required fields are marked *