nagios 如何用check_mongodb插件监控mongodb

monicazhang

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当在生产环境下使用某种服务时，相应的监控措施也应当完善起来，来检测服务是否正常和获取相关信息是很有必要的。下面来说说使用nagios-plugin-mongodb来监控mongodb数据库。[ /mzupan/nagios-plugin-mongodb]mzupan/nagios-plugin-mongodb[/url] 1. 下载check_mongodb nagios插件 [ /766/blog/211305#]?[/url] nagios安装

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# cd /usr/local/nagios/libexec/
# wget --no-check-certificate [ /mzupan/nagios-plugin-mongodb/archive/master.zip]mzupan/nagios-plugin-mongodb/archive/master.zip[/url]
# unzip master
# mv nagios-plugin-mongodb-master nagios-plugin-mongodb
# chown -R nagios.nagios nagios-plugin-mongodb/

2. 安装Mongo Python驱动需要先安装 [ /html/4026.html]EPEL[/url]源。参见《 [ /html/4026.html]CentOS / RHCE 可供使用的yum[/url]》。 [ /766/blog/211305#]?[/url]

1	# yum install pymongo.x86_64

或者自己下载源码包编译。 [ /766/blog/211305#]?[/url]

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# wget --no-check-certificate [ /mongodb/mongo-python-driver/archive/master.zip]mongodb/mongo-python-driver/archive/master.zip[/url]
# unzip mongo-python-driver-master.zip
# cd mongo-python-driver-master
# python setup.py install

或通过python easy_install来安装。 [ /766/blog/211305#]?[/url]

1	# easy_install pymongo

3. check_mongodb.py 说明 [ /766/blog/211305#]?[/url]

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# ./check_mongodb.py --help usage: check_mongodb.py [options]

This Nagios plugin checks the health of mongodb.

options:
  -h, --help          show this help message and exit
  -H HOST, --host=HOST  The hostname you want to connect to
  -P PORT, --port=PORT  The port mongodb is runnung on
  -u USER, --user=USER  The username you want to login as
  -p PASSWD, --pass=PASSWD
                     The password you want to use for that user
  -W WARNING, --warning=WARNING
                     The warning threshold we want to set
  -C CRITICAL, --critical=CRITICAL
                     The critical threshold we want to set
  -A ACTION, --action=ACTION
                     The action you want to take
  --max-lag          Get max replication lag (for replication_lag action
                     only)
  --mapped-memory    Get mapped memory instead of resident (if resident
                     memory can not be read)
  -D, --perf-data    Enable output of Nagios performance data
  -d DATABASE, --database=DATABASE
                     Specify the database to check
  --all-databases    Check all databases (action database_size)
  -s, --ssl          Connect using SSL
  -r, --replicaset    Connect to replicaset              开源监控软件

  -q QUERY_TYPE, --querytype=QUERY_TYPE
                     The query type to check
                     [query|insert|update|delete|getmore|command] from
                     queries_per_second
  -c COLLECTION, --collection=COLLECTION
                     Specify the collection to check
  -T SAMPLE_TIME, --time=SAMPLE_TIME
                     Time used to sample number of pages faults

Nagios MongoDB监控插件的所有动作：通过参数-A来传递下列任一动作。这些动作有：'connect', 'connections', 'replication_lag', 'replication_lag_percent', 'replset_state', 'memory', 'memory_mapped', 'lock', 'flushing', 'last_flush_time', 'index_miss_ratio', 'databases', 'collections', 'database_size', 'database_indexes', 'collection_indexes', 'queues', 'oplog', 'journal_commits_in_wl', 'write_data_files', 'journaled', 'opcounters', 'current_lock', 'replica_primary', 'page_faults', 'asserts', 'queries_per_second', 'page_faults', 'chunks_balance', 'connect_primary', 'collection_state', 'row_count' [ /766/blog/211305#]?[/url] nagios配置

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connect – 默认动作. 检查连接
connections – 检查打开的数据库连接的百分比
memory – 检测内存使用量
memory_mapped – 检查映射内存的使用情况
lock – 检查锁定时间的百分比
flushing – 检查平均flush时间（以微秒）
last_flush_time – 检查上次刷新时间（以微秒）
index_miss_ratio – 检查索引命中失败率
databases – 检查数据库的总数
collections – 检查集合的总数
database_size – 检查特定数据库的大小
database_indexes – 检查特定数据库的索引大小
collection_indexes – 检查一个集合的索引大小
replication_lag – 检查复制延迟（以秒为单位）
replication_lag_percent – 检查复制延迟（以百分比表示）
replset_state – 检查副本集的状态
replica_primary – 检查副本集的主服务器
queries_per_second – 检查每秒查询量
connect_primary – 检查连接在一组中的主服务器
collection_state – 检查数据库中特定集合的状态

4. 定义nagios command [ /766/blog/211305#]?[/url]

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# vim /usr/local/nagios/etc/objects/commands.cfg define command {
command_name check_mongodb 监控软件

command_line $USER1$/nagios-plugin-mongodb/check_mongodb.py -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$ -A $ARG5$ -W $ARG6$ -C $ARG7$
}

define command {
command_name check_mongodb_database
command_line $USER1$/nagios-plugin-mongodb/check_mongodb.py -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$ -A $ARG5$ -W $ARG6$ -C $ARG7$ -d $ARG8$
}

define command {
command_name check_mongodb_collection
command_line $USER1$/nagios-plugin-mongodb/check_mongodb.py -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$ -A $ARG5$ -W $ARG6$ -C $ARG7$ -d $ARG8$ -c $ARG9$
}

define command {
command_name check_mongodb_replicaset
command_line $USER1$/nagios-plugin-mongodb/check_mongodb.py -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$ -A $ARG5$ -W $ARG6$ -C $ARG7$ -r $ARG8$
}

define command {
command_name check_mongodb_query
command_line $USER1$/nagios-plugin-mongodb/check_mongodb.py -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$ -A $ARG5$ -W $ARG6$ -C $ARG7$ -q $ARG8$
}

5. 创建监控项 5.1 Check Connection 需要监控集群中每台mongodb实例。 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Connect Check
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !connect!2!4
}

5.2 Check Percentage of Open Connections 检查空闲连接率 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Free Connections
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !connections!70!80
}

5.3 Check Replication Lag 检测复制延迟 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Replication Lag                   nagios实施

check_command check_mongodb!10.1.11.155!27017!check_mongodb! !replication_lag!15!30
}

5.4 Check Replication Lag Percentage 检查复制滞后百分比。如果检查达到100％的话就需要完全重新同步。 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Replication Lag Percentage
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !replication_lag_percent!50!75
}

5.5 Check Memory Usage 检查内存使用情况 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Memory Usage
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !memory!20!28
}

5.6 Check Mapped Memory Usage 检查mongodb映射内存使用情况 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Mapped Memory Usage
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !memory_mapped!20!28
}

5.7 Check Lock Time Percentage 检查锁定时间百分比。如果有锁定时间通常意味着数据库已经超载。 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Lock Percentage
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !lock!5!10
}

5.8 Check Average Flush Time 检查平均刷新时间。如果平均刷新时间高就意味着数据库存在大量写。 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Flush Average
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !flushing!100!200
}

5.9 Check Last Flush Time 检查最后刷新时间。如果最后刷新时间高就意味着服务器可能存在IO压力，需要更换更快的磁盘。 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Last Flush Time
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !last_flush_time!200!400
}

5.10 Check status of mongodb replicaset 检查的MongoDB replicaset状态 [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB state
   check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !replset_state!0!0
}

5.11 Check status of index miss ratio 检查索引命中失败率。如果该值高，需要考虑添加索引了。 [ /766/blog/211305#]?[/url]

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define service {
use generic-service nagios培训

   hostgroup_name       Mongo Servers
   service_description    MongoDB Index Miss Ratio
   check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !index_miss_ratio!.005!.01
}

5.12 Check number of databases and number of collections [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Number of databases
   check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !databases!300!500
}

define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Number of collections
   check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !collections!300!500
}

5.13 Check size of a database 检查数据库的大小。跟踪数据增长率。 [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Database size db_ttlsa_posts
   check_command          check_mongodb_database!10.1.11.155!27017!check_mongodb! !database_size!300!500!db_ttlsa_posts
}

5.14 Check index size of a database 检查数据库的索引大小 [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Database index size db_ttlsa_posts
   check_command          check_mongodb_database!10.1.11.155!27017!check_mongodb! !database_indexes!50!100!db_ttlsa_posts
}

5.15 Check index size of a collection 检查一个集合的索引大小 [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Database index size db_ttlsa_posts
   check_command          check_mongodb_collection!10.1.11.155!27017!check_mongodb! !collection_indexes!50!100!db_ttlsa_posts!posts
}

5.16 Check the primary server of replicaset 检查replicaset的主服务器 [ /766/blog/211305#]?[/url]

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Replicaset Master Monitor: replset_ttlsa
   check_command          check_mongodb_replicaset!10.1.11.155!27017!check_mongodb! !replica_primary!0!1!replset_ttlsa
}

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define service {
   use                   generic-service
   hostgroup_name       Mongo Servers
   service_description    MongoDB Updates per Second
   check_command          check_mongodb_query!10.1.11.155!27017!check_mongodb! !queries_per_second!200!150!update
}

5.18 Check Primary Connection [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Connect Check
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !connect_primary!2!4
}

5.19 Check Collection State 检测集合状态 [ /766/blog/211305#]?[/url]

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define service {
use                generic-service
hostgroup_name       Mongo Servers
service_description    Mongo Collection State
check_command          check_mongodb!10.1.11.155!27017!check_mongodb! !collection_state!db_ttlsa_posts!posts
}

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