nagios 如何用check_mongodb插件监控mongodb

2016-04-16 11:00

来自：网络

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 1. 下载check_mongodb nagios插件 [ /766/blog/211305#]? 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 # 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源。参见《 [ /html/4026.html]CentOS / RHCE 可供使用的yum》。 [ /766/blog/211305#]?

1	# yum install pymongo.x86_64

或者自己下载源码包编译。 [ /766/blog/211305#]?

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# wget --no-check-certificate [ /mongodb/mongo-python-driver/archive/master.zip]mongodb/mongo-python-driver/archive/master.zip
# 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#]?

1	# easy_install pymongo

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

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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#]? 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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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#]?

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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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