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ZooKeeper is a distributed hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed systems. ZooKeeper was a sub-project of Hadoop.
ZooKeeper's architecture achieves high availability through redundant services and ZooKeeper nodes store their data in a hierarchical name space, which maintains the consistency of a shared configuration service. ZooKeeper is utilized by a variety of large organizations including Rackspace, Yahoo!, Reddit, and eBay as well as open source enterprise search systems such as Solr.
|Open_file_descriptor_percentage||Number of ZooKeeper file descriptors|
|Latency||The average/minimum/maximum latency of ZooKeeper|
|Server_mode||The current mode of the server (leader, follower and standalone)|
|Watch_count||The number of watchers on the ZooKeeper nodes|
|Ephemerals_count||Number of temporary nodes|
|Approximate_data_size||The size of the nodes|
|Synced_followers||The number of followers that the leader is sync with (only available on the Leader server)|
|Pending_syncs||The number of followers that the leader is waiting to sync with (only available on the Leader server)|
|Followers||The number of followers the leader server has (only available on the Leader server)|
|Packets_received||The total number of packets received by ZooKeeper|
|Packets_sent||The total number of packets sent by ZooKeeper|
|Connections||The ZooKeeper connection count|
|Outstanding_requests||The total number of oustanding requests|
|Node_count||The ZooKeeper node count|
This Opspack has been tested against ZooKeeper 3.3.0 and 3.4.9. Some of the service checks will only work with ZooKeeper version 3.4+ and the leader server.
If you are running a version older than 3.4, then you will need to disable the service checks connections, approximate_data_size, ephemeral_count, followers, open_file_descriptor_percentage, pending_syncs, synced_followers and watch_count.
If you are monitoring a server that is in follower or standalone mode, then you will need to disable the service checks followers, pending_followers and synced_followers as these metrics are only available on the leader machine.
If you are running ZooKeeper with a non-Unix operating system, you will need to disable the service check open_file_descriptor_percentage.
Setup and Configuration
To configure and utilize this Opspack, you simply need to add the 'Application - ZooKeeper' Opspack to the host running the Zookeeper software. If Zookeeper is not using port 2181, specify the ZooKeeper Port via the variable 'ZOOKEEPER_PORT'.
Step 1: Add the host template
Step 2: Add and configure the ZOOKEEPER_PORT variable
Step 3: Reload and view the ZooKeeper statistics
ODI-1154 Release Opspacks for Opsview Monitor 6.0
Initial release of Opspack to work with Opsview Monitor 6.0
ODI-15 - Zookeeper Opspack
Initial release for Zookeeper Opspack