#Zabbix templates for mongodb monitoring

For a long time I've used the Mikoomi mongodb template for mongodb monitoring. It was work fine for us for all mongodb 2.x versions. Since mongodb 3.x it fails and after a few patches I decide to made my own simple templates. The main tasks of monitoring for us:

1. Watch and notify the support team if mongodb instances is not running or not reachable
2. Watch a basic mongodb and mongos opcounters
3. Watch and notify for Mongodb Replicasets health
4. Monitor more than one mongodb instance per host
5. Watch DiskIO counters - it runs well with outstanding third party Iostat-Disk-Utilization-Template (https://github.com/lesovsky/zabbix-extensions/tree/master/files/iostat)
6. Provide easy-to-use and easy-to-understand user view for staff.

Technically, for fine mongodb performance tuning you need much more information than provides this templates, but its harder to collect, store and visualize with Zabbix, and anyway it would be better to use specially designed mongodb tools. Google it for more information.

This package contains 3 templates for monitoring mongodb instances (Mongo-DB template), mongos instance (Mongos template) and replicaset health (Mongo-RS Health template). By customising your hosts configurations with this templates you can monitor lagre mongodb clusters. For us it monitors 10 mongodb instances in sharded 5 big replicasets, 4 instances of small metadata database, config database replicaset, 5 mongos routers and backup server.

##How to install Mongo-DB template

Mongo-DB template is used to collect the basic mongodb server opcounters and notify if the instance is gone.

Server requirements: Ubuntu 14.04 (tested, but should work on any linux, Centos 6,7, Ubuntu 12.04 etc.) Zabbix server 2.4 (tested, but should work with any Zabbix 2.x) mongodb-org-tools and mongodb-org-shell packages installed

1. Downoad package from github.
2. Import xml templates to Zabbix server via browser Configuration -> Templates -> Import template
3. Upload *.pl files to zabbix server, put it to external scrips folder (/usr/lib/zabbix/externalscrips for my server), and chown +x mongo*.pl
4. Install on zabbix server required perl modules via command line

sudo cpan List::Util
sudo cpan MongoDB
sudo cpan Zabbix::Sender
sudo cpan Getopt::Long

5. Navigate to hosts configuration in zabbix server and add Mongo-DB template to host with mongodb instance.
6. In Macros tab add the following data

{$MONGODB_HOSTNAME}  IP or DNS name of interface used by mongodb instance
{$MONGODB_USER}  User name
{$MONGODB_PASS}  Password
{$MONGODB_PORT}  Port used by mongodb instance
{$MONGODB_ZABBIX_NAME}  Server hostname, as it registered in zabbix (I use two different interfaces for each mongodb server, mongodb instance is using one, other services including zabbix agent - another).

In a few minutes it starts to collect data. See the Misc: Data collector in zabbix latest data for easy debug.

For Mongo-DB zabbix graphs go to Monitoring -> Graphs, then select the host with mongodb instance and select Mongo-DB Opcounters and Mongo-DB Network IO graphs. The best way to use this data by your team is to compose special zabbix screens with this graphs with all your servers. How to do this see https://www.zabbix.com/documentation/2.4/manual/config/visualisation/screens

##How to install Mongos template

Mongos template is used to collect the basic mongos server opcounters and notify if the instance is gone.

In case you run mongos instance on the same hardware with any mongodb instance and have the same hostname, user and pass Mongos template will use the Macros data from previously configured Mongo-DB template. You have to do only two steps to get Mongos running.

1 Navigate to hosts configuration in zabbix server and add Mongos template to host with mongos instance.

2. In Macros tab add the following data

{$MONGOS_PORT}  Port used by mongodb instance

In case the mongos instance is running on dedicated hardware or VM you have to add in Macros tab the following data

{$MONGODB_HOSTNAME}  IP or DNS name of interface used by mongodb instance
{$MONGODB_USER}  User name
{$MONGODB_PASS}  Password
{$MONGOS_PORT}  Port used by mongodb instance
{$MONGODB_ZABBIX_NAME}  Server hostname, as it registered in zabbix (I use two different interfaces for each mongodb server, mongodb instance is using one, other services including zabbix agent - another).

In a few minutes it starts to collect data. See the Mongos Misc: Mongos data collector in zabbix latest data for easy debug.

##How to install Mongo-RS Health template

Mongo-RS Health template is used to watch for replicasets and notify if one of replicaset members goes unreachable. Navigate to hosts configuration in zabbix server and add Mongo-RS Health template to same host with Mongo-DB template.

See RS data collector in Mongo Replica Set section in zabbix latest data for debug.

Will add later

Pls feel free to contact me

http://petrushin.org/

petrushinvs at gmail-dot-com