Performance Analysis and Capacity Planing

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1 Performance Analysis and Capacity Planing collectd the system statistics collection daemon Sebastian tokkee Harl teamix GmbH / collectd core team Libre Software Meeting 2012 July 10, 2012

2 teamix GmbH Solid IT-Infrastructure Location: Nuremberg, Munich, Frankfurt Open-Source Monitoring Network N-IX NetApp Juniper Riverbed VMWare Trainings collectd slide 2

3 collectd Overview Overview Main Features Feature Overview Extending collectd Extras collectd slide 3

4 collectd overview collectd collects performance data of systems some (simple) examples: CPU utilization memory utilization network traffic collectd collects and stores the performance data stored data is usually used to generate graphs performance analysis, capacity planing not to be confused with monitoring! Homepage: collectd slide 4

5 Main features daemon free software (mostly GPL) portable (Linux, *BSD, Solaris,... ) scalable (OpenWrt,..., Cluster / Cloud) sophisticated network support efficient (default resolution: 10 seconds) flexible architecture modular (more than 100 plugins in Version 5.1) collectd slide 5

6 Main features daemon free software (mostly GPL) portable (Linux, *BSD, Solaris,... ) scalable (OpenWrt,..., Cluster / Cloud) sophisticated network support efficient (default resolution: 10 seconds) flexible architecture modular (more than 100 plugins in Version 5.1) collectd slide 5

7 10 seconds resolution collectd slide 6

8 Main features daemon free software (mostly GPL) portable (Linux, *BSD, Solaris,... ) scalable (OpenWrt,..., Cluster / Cloud) sophisticated network support efficient (default resolution: 10 seconds) flexible architecture modular (more than 100 plugins in version 5.1) collectd slide 7

9 available plugins (version 5.1) amqp battery cpufreq dbi entropy GenericJMX.java iptables load match hashed md Monitorus.pm network ntpd openvpn ping python sensors table target scale ted uptime vserver write redis apache bind csv df ethstat gmond ipvs logfile match regex memcachec multimeter nfs numa OpenVZ.pm postgresql redis serial tail target set thermal users wireless xmms apcups conntrack curl disk exec hddtemp irq lpar match timediff memcached mysql nginx nut oracle powerdns routeros snmp tape target v5upgrade threshold uuid write graphite zfs arc apple sensors contextswitch curl json dns filecount interface java madwifi match value memory netapp notify desktop olsrd perl processes rrdcached swap target notification tcpconns tokyotyrant varnish write http ascent cpu curl xml fscache ipmi libvirt match empty counter mbmon modbus netlink notify onewire pinba protocols rrdtool syslog target replace teamspeak2 unixsock vmem write mongodb collectd slide 8

10 collectd setup daemon collects data locally runs on every client system (exceptions: SNMP, databases, etc.) one or more central servers clients push their data to the central servers first steps: install; select plugins; start daemon; enjoy ;-) collectd slide 9

11 data display: Collection 4 (C4) provide collected data through JSON different frontends possible efficiently handles large amounts of data flexible configuration of graphs collectd slide 10

12 data display: Graphite collectd slide 11

13 collectd Overview Feature Overview CPU, memory, network I/O Networking Support RRDtool Support Generic Plugins (Overview) Extending collectd Extras collectd slide 12

14 plugin overview specialized read plugins CPU, memory, network interfaces,... IO plugins network plugin RRDtool, RRDCacheD Graphite MongoDB, Redis AMQP generic plugins SNMP tail PostgreSQL filter-chains collectd slide 13

15 CPU, memory, network I/O configuration synopsis LoadPlugin "cpu" LoadPlugin "memory" LoadPlugin "interface" collectd slide 14

16 CPU, memory, network I/O configuration synopsis LoadPlugin "cpu" LoadPlugin "memory" LoadPlugin "interface" <Plugin interface> Interface lo Interface sit0 IgnoreSelected true </Plugin> collectd slide 14

17 CPU, memory, network I/O collectd slide 15

18 CPU, memory, network I/O collectd slide 16

19 CPU, memory, network I/O collectd slide 17

20 Networking Support modes of operation send data ( client ) receive data ( server ) forward data ( proxy ) Unicast ( point-to-point ) Multicast ( point-to-group ) IPv4 and IPv6 rule them all Modes may be mixed arbitrarily. collectd slide 18

21 network plugin: server / client synopsis: client LoadPlugin "network" <Plugin "network"> Server "collectd0.example.com" Server "collectd1.example.com" Server "ff18::efc0:4a42" </Plugin> collectd slide 19

22 network plugin: server / client synopsis: server LoadPlugin "network" <Plugin "network"> Listen "collectd0.example.com" Listen "ff18::efc0:4a42" </Plugin> collectd slide 20

23 network plugin: proxy synopsis: proxy LoadPlugin "network" <Plugin "network"> Listen "collectgw.extern.example.com" Server "collectd1.intern.example.com" Forward true </Plugin> collectd slide 21

24 RRDtool plugin writes data to RRD files efficiently caching functionality now also available in RRDtool as stand-alone RRD Caching Daemon (RRDCacheD) synopsis LoadPlugin "rrdtool" <Plugin "rrdtool"> DataDir "/var/lib/collectd/rrd" </Plugin> collectd slide 22

25 RRDtool plugin (caching) configuration synopsis <Plugin "rrdtool"> DataDir "/var/lib/collectd/rrd" CacheTimeout 3600 CacheFlush # 1 hour # 1 day WritesPerSecond 30 </Plugin> FLUSH command allows for graphing of current values collectd slide 23

26 generic plugins (overview) idea: generic approaches rather than specialized solutions user configuration determines behavior new equipment does not require a new version of collectd examples: SNMP, tail, curl, DBI, PostgreSQL collectd slide 24

27 SNMP plugin: UPS load collectd slide 25

28 tail plugin: SSH brute-force attack collectd slide 26

29 collectd Overview Feature Overview Extending collectd UNIXSOCK interface Custom Extensions Extras collectd slide 27

30 custom extensions (overview) collectd API: C, Perl, Python, Java external programs may use unixsock or exec plugins collectd slide 28

31 interacting with collectd UNIXSOCK plugin opens a UNIX socket text and line based protocol (e. g. PUTVAL, FLUSH, LISTVAL, GETVAL) query and submit values collectd-nagios collectdctl (since version 5.0) cussh.pl: collectd UNIX socket shell collectd slide 29

32 UNIXSOCK plugin: example -> <<<<- GETVAL "FQDN/load/load" 3 Values found shortterm= e-02 midterm= e-02 longterm= e-02 -> PUTVAL FQDN/users/users :42 <- 0 Success: 1 value has been dispatched. collectd slide 30

33 Perl plugin overview integrates a Perl interpreter (similar to Apache s mod perl) compiles Perl code only once exports internal API ( full flexibility available) also available Java and Python collectd slide 31

34 exec plugin overview executes arbitrary programs / scripts parses STDOUT of the program respawns process upon termination (cf. init) collectd slide 32

35 exec plugin: example #! /bin/bash INTVL=${COLLECTD_INTERVAL:-10} CHOST="${COLLECTD_HOSTNAME:-localhost}" IDENT="$CHOST/magic/magic_level" while sleep $INTVL do V= magic --level echo "PUTVAL \"$IDENT\" interval=$intvl date +%s :$V" done collectd slide 33

36 Future aggregation of arbitrary values per-plugin interval settings Nagios support (pushing information to Nagios) store data in RMDBSs... collectd slide 34

37 collectd Thank you for your attention! Questions? collectd slide 35

38 collectd Contact: Sebastian tokkee Harl teamix GmbH, Nuremberg irc.freenode.net/#collectd collectd slide 36

39 collectd Overview Feature Overview Extending collectd Extras SNMP plugin RRDCacheD Plugin collectd Internals Perl Plugin collectd slide 37

40 SNMP plugin overview queries network equipment via SNMP generic: not specialized for any particular hardware queries multiple systems in parallel configuration Data Block Host block collectd slide 38

41 SNMP plugin synopsis: data block <Plugin "snmp"> <Data "ifmib_if_octets64"> Type "if_octets" Table true Instance "IF-MIB::ifName" Values "IF-MIB::ifHCInOctets" \ "IF-MIB::ifHCOutOctets" </Data> </Plugin> collectd slide 39

42 SNMP plugin synopsis: host block <Plugin "snmp"> <Host "switch0.intern.musterfirma.de"> Address " " Version 1 Community "public" Collect "ifmib_if_octets64" Interval 60 </Host> </Plugin> collectd slide 40

43 RRDCacheD plugin overview generalizes caching idea of the rrdtool plugin standalone daemon integrated into RRDtool (available since version 1.4) extended feature set, e. g. journal benefit: restart collectd without losing cache collectd slide 41

44 Suchbaum RRDCacheD plugin c Florian octo Forster graphic collectd slide 42

45 Suchbaum RRDCacheD plugin c Florian octo Forster graphic collectd slide 42

46 Thread Dateisystem Queue Update- Suchbaum Update- RRDCacheD plugin c Florian octo Forster graphic collectd slide 42

47 Thread Dateisystem Flush-Queue Queue Update- Suchbaum Update- RRDCacheD plugin c Florian octo Forster graphic collectd slide 42

48 collectd internals core: read thread() p = get next plugin(); sleep until due(p); collectd slide 43

49 collectd internals core: read thread() plugin1.c:read() p->callback(); collectd slide 43

50 collectd internals plugin1.c:read()... dispatch values(v); collectd slide 43

51 collectd internals core: dispatch values() plugin1.c:read()... plugin write(v);... dispatch values(v); collectd slide 43

52 collectd internals core: dispatch values() plugin1.c:read() plugin2.c:write()... plugin write(v);... dispatch values(v);... collectd slide 43

53 Perl plugin: example package Collectd::Plugin::Magic; use Collectd qw( :all ); sub magic_read { my $vl = { plugin => magic, values => [Magic->getCurrentLevel ()] }; plugin_dispatch_values ( magic_level, $vl); } plugin_register (TYPE_READ, magic, magic_read ); collectd slide 44

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