Re: Ndoutils e problemas de performance

igor antonio <[email protected]>
Newsgroups gmane.network.nagios.user.brazil
Message-ID <[email protected]>
galera, sou novo na instalaçao do nagios..
queria saber se alguem te um tutorial sobre o nagios
obrigado!

2009/6/9 Leonardo Neves <[email protected]>

> Cristiano e Marcel,
>
> Achei a soluçao para o problema. O ambiente comum eh assim:
>
> nagios -> ndo2db (-> mysql) -> nagvis
>
> Instalei o ndo2fs no meio do caminho, ficando assim:
>
> nagios -> ndo2fs -> ndo2db (-> mysql) -> nagvis
>
> O ndo2fs nao eh bloqueante e dessa forma o nagios nao fica lento. Nos meus
> testes com o ndo2fs o nagios ficou 5x mais rapido.
> Com o nagvis 1.4 tambem eh possivel acessar o ndo2fs diretamente e deve ser
> mais rapido ainda, mas nao testei.
>
> Meu sentimento eh que o ndo2db foi muito mal feito, ainda bem que ja estao
> criando e usando alternativas :(
>
> Atenciosamente,
> Leonardo Neves Bernardo
> Linux/Unix Specialist
> LPIC3 (core+mixed environment+security) + RHCT
>
>
>
> 2009/5/18 Leonardo Neves <[email protected]>
>
> > Eu acho que algum dos patches do nagios, disponibilizados pelo pessoal do
> > opsview, deve resolver o problema:
> >
> >
> http://trac.opsview.org/browser/tags/release-3.0.0/opsview-base/Makefile#L238
> > http://opsview-blog.opsera.com/dotorg/nagios/
> >
> > Ainda nao tive tempo para testar.
> >
> > Atenciosamente,
> > Leonardo Neves Bernardo
> > Linux/Unix Specialist
> > LPIC3 (core+mixed environment+security) + RHCT
> >
> >
> >
> > 2009/5/15 Marcel <[email protected]>
> >
> > amigos, o ndo2db + ndomod são blocantes ao nagios (o nagios espera o
> >> retorno
> >> do mod, e se o banco demora, o mod demora e o nagios demora), tentem
> >> desacoplar o input ao banco de dados. sei que pode ser feito, mas
> ninguém
> >> diz como. ;)
> >>
> >> 2009/5/12 Leonardo Neves <[email protected]>
> >>
> >> > Cristiano,
> >> >
> >> > Tenho um ambiente bem parecido, atualmente sao 4300 services e os
> mesmos
> >> > problemas de performance acontecem com o ndoutil. Pelo que li, ele
> >> > realmente
> >> > eh sequencial. Quando eh necessario um reload o nagios ainda tem que
> >> > atualizar todos os dados no mysql antes do nagvis ficar disponivel.
> >> > Pelo jeito a solucao eh esperar uma alternativa ao ndoutil ou uma
> >> correçao
> >> > do mesmo.
> >> >
> >> > A unica coisa que fiz e que voce nao fez ainda eh agendar manutencao
> >> diaria
> >> > no bd:
> >> > db=nagios
> >> > echo "USE $db; DELETE FROM nagios_servicechecks WHERE start_time <=
> >> (NOW()
> >> > -
> >> > INTERVAL 1 DAY)" | mysql $MYSQL_LOGIN >/dev/null
> >> > echo "USE $db; DELETE FROM nagios_hostchecks WHERE start_time <=
> (NOW()
> >> -
> >> > INTERVAL 1 DAY)" | mysql $MYSQL_LOGIN >/dev/null
> >> >
> >> > for db in $(echo "SHOW DATABASES;" | mysql $MYSQL_LOGIN | grep -v -e
> >> > "Database" -e "information_schema" -e "test")
> >> > do
> >> >        TABLES=$(echo "USE $db; SHOW TABLES;" | mysql $MYSQL_LOGIN |
> >>  grep
> >> > -v Tables_in_)
> >> >        echo "Switching to database $db"
> >> >        for table in $TABLES
> >> >        do
> >> >                echo -n " * Optimizing table $table ... "
> >> >                echo "USE $db; OPTIMIZE TABLE $table" | mysql
> >> $MYSQL_LOGIN
> >> > >/dev/null
> >> >                echo "done."
> >> >        done
> >> > done
> >> >
> >> > As tabelas nagios_servicechecks e nagios_hostchecks sao apenas de
> >> historico
> >> > e os dados antigos podem ser deletados ja que os logs ja tem a
> >> informacao.
> >> >
> >> > Se voce teve algum progresso, favor nos reportar.
> >> >
> >> > Atenciosamente,
> >> > Leonardo Neves Bernardo
> >> > Linux/Unix Specialist
> >> > LPIC3 (core+mixed environment+security) + RHCT
> >> >
> >> >
> >> >
> >> > 2009/5/7 Cristiano Casado <[email protected]>
> >> >
> >> > > Olá a todos.
> >> > >
> >> > > Estou utilizando em ambiente de laboratório o Nagios 3.0.6 com
> >> ndoutils
> >> > > 1.4b7 e MySQL 5.0 em uma máquina Linux CentOS 5.2 (2.6.18) x64 com
> 2GB
> >> > ram
> >> > > e
> >> > > processador Intel Xeon 2.50GHz.
> >> > > Optei em utilizar o ndoutils para manter informacoes históricas de
> >> checks
> >> > > no
> >> > > banco de dados (tables nagios_servicechecks e nagios_hostcheks),
> assim
> >> > como
> >> > > utilizar o NagVis para representacao gráfica das minhas redes.
> >> > >
> >> > > Os testes funcionais foram bons, porém cheguei ao ponto do projeto
> em
> >> que
> >> > > tive que fazer um benchmark com um número de 7.000 services,
> simulando
> >> o
> >> > > que
> >> > > vou encontrar em ambiente de producao.
> >> > >
> >> > > Carregando o broker ndomod porém sem executar o daemon ndo2db
> consigo
> >> uma
> >> > > performance boa de service checks com quase 95% dos services sendo
> >> > > processados na janela de 5 min e com uma latência de check baixa.
> >> > > Importante
> >> > > ressaltar que todos os services são ativos (não passivos) com
> >> > > check_interval
> >> > > de 5 minutos.
> >> > >
> >> > > Ao executar o daemon ndo2db, onde o mesmo inicializa o socket unix e
> >> > comeca
> >> > > as operacoes em banco de dados, percebo uma perda considerável de
> >> > > performance do service check com apenas 9% dos services sendo
> >> processados
> >> > > na
> >> > > janela de 5 min, latência alta de checks e o contador de iowait da
> CPU
> >> > > entre
> >> > > 90% e 100%.  Services que deveriam ser processados pelo daemon do
> >> Nagios
> >> > em
> >> > > 5 min são processados com delay de até 1 hora, o que inviabiliza a
> >> > solucao
> >> > > como ferramenta de monitoracao.
> >> > >
> >> > > Como o MySQL está na mesma máquina, fiz o tunning nele (buffer,
> >> threads,
> >> > > etc), apliquei índices adicionais as tabelas e testei passando as
> >> tabelas
> >> > > do
> >> > > database nagios para o esquema "blackhole".  Desta forma o banco
> >> aceita
> >> > > conexões e operacoes (select, insert, delete, ...) porém não grava
> os
> >> > dados
> >> > > em disco.  O iowait continuou alto e a performance ruim.  Não
> >> desconfio
> >> > > mais
> >> > > do banco de dados.
> >> > >
> >> > > Percebi que o daemon do ndo2db utiliza apenas 1 conexão com o banco
> de
> >> > > dados
> >> > > para fazer diversas operacoes por segundo, sendo que cada operacao
> >> > aguarda
> >> > > o
> >> > > final da execucao anterior. O que particularmente acho ruim.
> >> > >
> >> > > Pergunta:  alguém utiliza as facilidades do ndoutils com banco de
> >> dados
> >> > em
> >> > > grande instalacoes do Nagios ( >1500 hosts  >7000 services) e que
> não
> >> > tenha
> >> > > estes problemas de performance para me dar uma luz ?
> >> > >
> >> > > As configuracoes do Nagios estão abaixo.
> >> > > Segui algumas recomendacoes de tunning para o Nagios do documento
> >> > > http://nagios.sourceforge.net/docs/3_0/tuning.html
> >> > >
> >> > >
> >> > > Obrigado.
> >> > > Cristiano Casado.
> >> > >
> >> > >
> >> > > ### Nagios Config ###
> >> > > log_file=/var/log/nagios/nagios.log
> >> > > object_cache_file=/var/nagios/objects.cache
> >> > > precached_object_file=/var/nagios/objects.precache
> >> > > resource_file=/etc/nagios/resource.cfg
> >> > > status_file=/var/nagios/status/status.dat
> >> > > status_update_interval=10
> >> > > nagios_user=nagios
> >> > > nagios_group=nagios
> >> > > check_external_commands=1
> >> > > command_check_interval=15s
> >> > > command_file=/var/nagios/rw/nagios.cmd
> >> > > external_command_buffer_slots=4096
> >> > > lock_file=/var/run/nagios.pid
> >> > > temp_file=/var/nagios/nagios.tmp
> >> > > temp_path=/tmp
> >> > > event_broker_options=-1
> >> > > broker_module=/usr/libexec/ndomod-3x.o
> >> config_file=/etc/nagios/ndomod.cfg
> >> > > log_rotation_method=d
> >> > > log_archive_path=/var/log/nagios/archives
> >> > > use_syslog=1
> >> > > log_notifications=1
> >> > > log_service_retries=1
> >> > > log_host_retries=1
> >> > > log_event_handlers=1
> >> > > log_initial_states=0
> >> > > log_external_commands=1
> >> > > log_passive_checks=1
> >> > > service_inter_check_delay_method=s
> >> > > max_service_check_spread=30
> >> > > service_interleave_factor=s
> >> > > host_inter_check_delay_method=s
> >> > > max_host_check_spread=30
> >> > > max_concurrent_checks=0
> >> > > check_result_reaper_frequency=5
> >> > > max_check_result_reaper_time=5
> >> > > check_result_path=/var/nagios/spool/checkresults
> >> > > max_check_result_file_age=3600
> >> > > cached_host_check_horizon=30
> >> > > cached_service_check_horizon=60
> >> > > enable_predictive_host_dependency_checks=1
> >> > > enable_predictive_service_dependency_checks=1
> >> > > soft_state_dependencies=0
> >> > > auto_reschedule_checks=0
> >> > > auto_rescheduling_interval=30
> >> > > auto_rescheduling_window=180
> >> > > sleep_time=0.25
> >> > > service_check_timeout=60
> >> > > host_check_timeout=30
> >> > > event_handler_timeout=30
> >> > > notification_timeout=30
> >> > > ocsp_timeout=5
> >> > > perfdata_timeout=5
> >> > > retain_state_information=1
> >> > > state_retention_file=/var/nagios/retention.dat
> >> > > retention_update_interval=60
> >> > > use_retained_program_state=1
> >> > > use_retained_scheduling_info=1
> >> > > retained_host_attribute_mask=0
> >> > > retained_service_attribute_mask=0
> >> > > retained_process_host_attribute_mask=0
> >> > > retained_process_service_attribute_mask=0
> >> > > retained_contact_host_attribute_mask=0
> >> > > retained_contact_service_attribute_mask=0
> >> > > interval_length=60
> >> > > use_aggressive_host_checking=0
> >> > > execute_service_checks=1
> >> > > accept_passive_service_checks=1
> >> > > execute_host_checks=1
> >> > > accept_passive_host_checks=1
> >> > > enable_notifications=1
> >> > > enable_event_handlers=1
> >> > > process_performance_data=0
> >> > > obsess_over_services=0
> >> > > obsess_over_hosts=0
> >> > > translate_passive_host_checks=0
> >> > > passive_host_checks_are_soft=0
> >> > > check_for_orphaned_services=1
> >> > > check_for_orphaned_hosts=1
> >> > > check_service_freshness=1
> >> > > service_freshness_check_interval=60
> >> > > check_host_freshness=0
> >> > > host_freshness_check_interval=60
> >> > > additional_freshness_latency=15
> >> > > enable_flap_detection=1
> >> > > low_service_flap_threshold=5.0
> >> > > high_service_flap_threshold=20.0
> >> > > low_host_flap_threshold=5.0
> >> > > high_host_flap_threshold=20.0
> >> > > date_format=us
> >> > > p1_file=/usr/bin/p1.pl
> >> > > enable_embedded_perl=1
> >> > > use_embedded_perl_implicitly=1
> >> > > illegal_object_name_chars=`~!$%^&*|'"<>?,()=
> >> > > illegal_macro_output_chars=`~$&|'"<>
> >> > > use_regexp_matching=0
> >> > > use_true_regexp_matching=0
> >> > > admin_email=nagios@localhost
> >> > > admin_pager=pagenagios@localhost
> >> > > daemon_dumps_core=0
> >> > > use_large_installation_tweaks=1
> >> > > enable_environment_macros=0
> >> > > debug_level=0
> >> > > debug_verbosity=1
> >> > > debug_file=/var/log/nagios/nagios.debug
> >> > > max_debug_file_size=1000000
> >> > > cfg_file=/etc/nagiosql/commands.cfg
> >> > > cfg_file=/etc/nagiosql/contactgroups.cfg
> >> > > cfg_file=/etc/nagiosql/contacts.cfg
> >> > > cfg_file=/etc/nagiosql/contacttemplates.cfg
> >> > > cfg_file=/etc/nagiosql/hostdependencies.cfg
> >> > > cfg_file=/etc/nagiosql/hostescalations.cfg
> >> > > cfg_file=/etc/nagiosql/hostextinfo.cfg
> >> > > cfg_file=/etc/nagiosql/hostgroups.cfg
> >> > > cfg_dir=/etc/nagiosql/hosts
> >> > > cfg_file=/etc/nagiosql/hosttemplates.cfg
> >> > > cfg_file=/etc/nagiosql/servicedependencies.cfg
> >> > > cfg_file=/etc/nagiosql/serviceescalations.cfg
> >> > > cfg_file=/etc/nagiosql/serviceextinfo.cfg
> >> > > cfg_file=/etc/nagiosql/servicegroups.cfg
> >> > > cfg_dir=/etc/nagiosql/services
> >> > > cfg_file=/etc/nagiosql/servicetemplates.cfg
> >> > > cfg_file=/etc/nagiosql/timeperiods.cfg
> >> > >
> >> > >
> >> >
> >>
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> >> https://lists.sourceforge.net/lists/listinfo/nagios-users-br
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> https://lists.sourceforge.net/lists/listinfo/nagios-users-br
> Wiki: http://nagios-br.sf.net/wiki
>
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Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing 
server and web deployment.
http://p.sf.net/sfu/businessobjects
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