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haproxy/contrib/netsnmp-perl/README

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[MAJOR] proto_uxst rework -> SNMP support Currently there is a ~16KB limit for a data size passed via unix socket. It is caused by a trivial bug ttat is going to fixed soon, however in most cases there is no need to dump a full stats. This patch makes possible to select a scope of dumped data by extending current "show stat" to "show stat [<iid> <type> <sid>]": - iid is a proxy id, -1 to dump all proxies - type selects type of dumpable objects: 1 for frontend, 2 for backend, 4 for server, -1 for all types. Values can be ORed, for example: 1+2=3 -> frontend+backend. 1+2+4=7 -> frontend+backend+server. - sid is a service id, -1 to dump everything from the selected proxy. To do this I implemented a new session flag (SN_STAT_BOUND), added three variables in data_ctx.stats (iid, type, sid), modified dumpstats.c and completely revorked the process_uxst_stats: now it waits for a "\n" terminated string, splits args and uses them. BTW: It should be quite easy to add new commands, for example to enable/disable servers, the only problem I can see is a not very lucky config name (*stats* socket). :| During the work I also fixed two bug: - s->flags were not initialized for proto_uxst - missing comma if throttling not enabled (caused by a stupid change in "Implement persistent id for proxies and servers") Other changes: - No more magic type valuse, use STATS_TYPE_FE/STATS_TYPE_BE/STATS_TYPE_SV - Don't memset full s->data_ctx (it was clearing s->data_ctx.stats.{iid/type/sid}, instead initialize stats.sv & stats.sv_st (stats.px and stats.px_st were already initialized) With all that changes it was extremely easy to write a short perl plugin for a perl-enabled net-snmp (also included in this patch). 29385 is my PEN (Private Enterprise Number) and I'm willing to donate the SNMPv2-SMI::enterprises.29385.106.* OIDs for HAProxy if there is nothing assigned already.
2008-03-02 01:42:14 +00:00
SNMP support for HAProxy
Copyright 2007-2008 Krzysztof Piotr Oledzki <ole@ans.pl>
Root OID: 1.3.6.1.4.1.29385.106
Files:
- README: this file
- haproxy.pl: Net-SNMP embedded perl module
- haproxy_backend.xml: Cacti snmp-query definition for backends
- haproxy_frontend.xml: Cacti snmp-query definition for frontends
Install:
cp haproxy.pl /etc/snmp/
grep -q "disablePerl false" /etc/snmp/snmpd.conf || echo "disablePerl false" >> /etc/snmp/snmpd.conf
echo "perl do '/etc/snmp/haproxy.pl';" >> /etc/snmp/snmpd.conf
Supported commands:
- GET (snmpget, snmpbulkget): quite fast.
- GETNEXT (snmpwalk, snmpbulkwalk): not so fast as requires to transfer
and parse a lot of data during each step. Always use "get" instead of "walk"
if that's possible.
Supported OIDs:
- 1.3.6.1.4.1.29385.106.1: get a variable from stats
Usage: 1.3.6.1.4.1.29385.106.1.$type.$field.$iid.$sid
- type is one of:
0) frontend
1) backend
2) server
- field is one of:
0..32) CSV format variable
10001) index
10002) unique name
- iid is a proxy id
- sid is a service id (sid): 0 for frontends and backends, >= 1 for servers
- 1.3.6.1.4.1.29385.106.2: get a variable from info
Usage: 1.3.6.1.4.1.29385.106.2.$req.$varnr
- req is one of:
0) get variable name
1) gat variable value
Examples:
- Get a list of frontends (type: 0) with status (field: 17):
$ snmpbulkwalk -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.1.0.17
SNMPv2-SMI::enterprises.29385.106.1.0.17.1.0 = STRING: "OPEN"
SNMPv2-SMI::enterprises.29385.106.1.0.17.47.0 = STRING: "OPEN"
- Get a list of backends (type: 1) with index (field: 10001):
$ snmpbulkwalk -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.1.1.10001
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1.0 = STRING: "1.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1100.0 = STRING: "1100.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1101.0 = STRING: "1101.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1200.0 = STRING: "1200.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1201.0 = STRING: "1201.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1300.0 = STRING: "1300.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1400.0 = STRING: "1400.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1401.0 = STRING: "1401.0"
SNMPv2-SMI::enterprises.29385.106.1.1.10001.1500.0 = STRING: "1500.0"
(...)
- Get a list of servers (type: 2) with unique name (field: 10002):
$ snmpbulkwalk -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.1.2.10002
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1100.1001 = STRING: "backend1/s2"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1100.1002 = STRING: "backend1/s5"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1100.1003 = STRING: "backend1/s6"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1100.1012 = STRING: "backend1/s7"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1101.1001 = STRING: "backend2/s9"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1101.1002 = STRING: "backend2/s10"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1101.1003 = STRING: "backend2/s11"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1101.1012 = STRING: "backend2/s12"
SNMPv2-SMI::enterprises.29385.106.1.2.10002.1200.1001 = STRING: "backend3/s8"
(...)
- Get a list of servers (type: 2) with weight (field: 18) in proxy 4300:
$ snmpbulkwalk -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.1.2.18.4300
SNMPv2-SMI::enterprises.29385.106.1.2.18.4300.1001 = STRING: "40"
SNMPv2-SMI::enterprises.29385.106.1.2.18.4300.1002 = STRING: "25"
SNMPv2-SMI::enterprises.29385.106.1.2.18.4300.1003 = STRING: "40"
SNMPv2-SMI::enterprises.29385.106.1.2.18.4300.1012 = STRING: "80"
- Get total sessions count (field: 7) in frontend (type: 1), sid.iid: 47.0 (proxy #47):
snmpget -c public -v2c 192.168.0.1 enterprises.29385.106.1.0.7.47.0
SNMPv2-SMI::enterprises.29385.106.1.0.7.47.0 = STRING: "1014019"
- Get a list of available variables (req: 0):
$ snmpbulkwalk -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.2.0
SNMPv2-SMI::enterprises.29385.106.2.0.0 = STRING: "Name"
SNMPv2-SMI::enterprises.29385.106.2.0.1 = STRING: "Version"
SNMPv2-SMI::enterprises.29385.106.2.0.2 = STRING: "Release_date"
SNMPv2-SMI::enterprises.29385.106.2.0.3 = STRING: "Nbproc"
SNMPv2-SMI::enterprises.29385.106.2.0.4 = STRING: "Process_num"
SNMPv2-SMI::enterprises.29385.106.2.0.5 = STRING: "Pid"
SNMPv2-SMI::enterprises.29385.106.2.0.6 = STRING: "Uptime"
SNMPv2-SMI::enterprises.29385.106.2.0.7 = STRING: "Uptime_sec"
SNMPv2-SMI::enterprises.29385.106.2.0.8 = STRING: "Memmax_MB"
SNMPv2-SMI::enterprises.29385.106.2.0.9 = STRING: "Ulimit-n"
SNMPv2-SMI::enterprises.29385.106.2.0.10 = STRING: "Maxsock"
SNMPv2-SMI::enterprises.29385.106.2.0.11 = STRING: "Maxconn"
SNMPv2-SMI::enterprises.29385.106.2.0.12 = STRING: "CurrConns"
- Get a variable (req: 1), varnr: 7 (Uptime_sec):
$ snmpget -c public -v2c 192.168.0.1 1.3.6.1.4.1.29385.106.2.1.7
SNMPv2-SMI::enterprises.29385.106.2.1.7 = STRING: "18761"
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