nagios check_mongodb插件監控mongodb

本文轉自:http://www.ttlsa.com/mongodb/nagios-check_mongodb-plugin-to-monitor-mongodb/

當在生產環境下使用某種服務時，相應的監控措施也應當完善起來，來檢測服務是否正常和獲取相關信息是很有必要的。

下面來說說使用nagios-plugin-mongodb來監控mongodb數據庫。https://github.com/mzupan/nagios-plugin-mongodb

1. 下載check_mongodb nagios插件

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# cd /usr/local/nagios/libexec/ # wget --no-check-certificate https://github.com/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. 安裝Mongo Python驅動

需要先安裝EPEL源。參見《CentOS / RHCE 可供使用的yum》。

1	# yum install pymongo.x86_64

或者自己下載源碼包編譯。

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# wget --no-check-certificate https://github.com/mongodb/mongo-python-driver/archive/master.zip # unzip mongo-python-driver-master.zip # cd mongo-python-driver-master # python setup.py install

或通過python easy_install來安裝。

1	# easy_install pymongo

3. check_mongodb.py 說明

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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   -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監控插件的所有動作：

通過參數-A來傳遞下列任一動作。這些動作有：'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'

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connect–默認動作.檢查連接 connections–檢查打開的數據庫連接的百分比 memory–檢測內存使用量 memory_mapped–檢查映射內存的使用情況 lock–檢查鎖定時間的百分比 flushing–檢查平均flush時間（以微秒） last_flush_time–檢查上次刷新時間（以微秒） index_miss_ratio–檢查索引命中失敗率 databases–檢查數據庫的總數 collections–檢查集合的總數 database_size–檢查特定數據庫的大小 database_indexes–檢查特定數據庫的索引大小 collection_indexes–檢查一個集合的索引大小 replication_lag–檢查複製延遲（以秒爲單位） replication_lag_percent–檢查複製延遲（以百分比表示） replset_state–檢查副本集的狀態 replica_primary–檢查副本集的主服務器 queries_per_second–檢查每秒查詢量 connect_primary–檢查連接在一組中的主服務器 collection_state–檢查數據庫中特定集合的狀態

4. 定義nagios command

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# vim /usr/local/nagios/etc/objects/commands.cfg   define command {     command_name    check_mongodb     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. 創建監控項

5.1 Check Connection 需要監控集羣中每臺mongodb實例。

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoConnectCheck     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!connect!2!4 }

5.2 Check Percentage of Open Connections 檢查空閒連接率

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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!www.ttlsa.com!connections!70!80 }

5.3 Check Replication Lag 檢測複製延遲

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoReplicationLag     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!replication_lag!15!30 }

5.4 Check Replication Lag Percentage 檢查複製滯後百分比。如果檢查達到100％的話就需要完全重新同步。

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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!www.ttlsa.com!replication_lag_percent!50!75 }

5.5 Check Memory Usage 檢查內存使用情況

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoMemoryUsage     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!memory!20!28 }

5.6 Check Mapped Memory Usage 檢查mongodb映射內存使用情況

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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!www.ttlsa.com!memory_mapped!20!28 }

5.7 Check Lock Time Percentage 檢查鎖定時間百分比。如果有鎖定時間通常意味着數據庫已經超載。

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoLockPercentage     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!lock!5!10 }

5.8 Check Average Flush Time 檢查平均刷新時間。如果平均刷新時間高就意味着數據庫存在大量寫。

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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!www.ttlsa.com!flushing!100!200 }

5.9 Check Last Flush Time 檢查最後刷新時間。如果最後刷新時間高就意味着服務器可能存在IO壓力，需要更換更快的磁盤。

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoLastFlushTime     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!last_flush_time!200!400 }

5.10 Check status of mongodb replicaset 檢查的MongoDB replicaset狀態

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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!www.ttlsa.com!replset_state!0!0 }

5.11 Check status of index miss ratio 檢查索引命中失敗率。如果該值高，需要考慮添加索引了。

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defineservice{       use                    generic-service       hostgroup_name          MongoServers       service_description    MongoDBIndexMissRatio       check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!index_miss_ratio!.005!.01 }

5.12 Check number of databases and number of collections

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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!www.ttlsa.com!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!www.ttlsa.com!collections!300!500 }

5.13 Check size of a database 檢查數據庫的大小。跟蹤數據增長率。

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defineservice{       use                    generic-service       hostgroup_name          MongoServers       service_description    MongoDBDatabasesizedb_ttlsa_posts       check_command          check_mongodb_database!10.1.11.155!27017!check_mongodb!www.ttlsa.com!database_size!300!500!db_ttlsa_posts }

5.14 Check index size of a database 檢查數據庫的索引大小

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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!www.ttlsa.com!database_indexes!50!100!db_ttlsa_posts }

5.15 Check index size of a collection 檢查一個集合的索引大小

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defineservice{       use                    generic-service       hostgroup_name          MongoServers       service_description    MongoDBDatabaseindexsizedb_ttlsa_posts       check_command          check_mongodb_collection!10.1.11.155!27017!check_mongodb!www.ttlsa.com!collection_indexes!50!100!db_ttlsa_posts!posts }

5.16 Check the primary server of replicaset 檢查replicaset的主服務器

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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!www.ttlsa.com!replica_primary!0!1!replset_ttlsa }

5.17 Check the number of queries per second 檢查每秒查詢數量。這將檢查服務器上每秒查詢數量，類型有：query|insert|update|delete|getmore|command

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defineservice{       use                    generic-service       hostgroup_name          MongoServers       service_description    MongoDBUpdatesperSecond       check_command          check_mongodb_query!10.1.11.155!27017!check_mongodb!www.ttlsa.com!queries_per_second!200!150!update }

5.18 Check Primary Connection

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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!www.ttlsa.com!connect_primary!2!4 }

5.19 Check Collection State 檢測集合狀態

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defineservice{     use                generic-service     hostgroup_name          MongoServers     service_description    MongoCollectionState     check_command          check_mongodb!10.1.11.155!27017!check_mongodb!www.ttlsa.com!collection_state!db_ttlsa_posts!posts }

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