check_hadoop_hdfs_webhdfs.pl (Advanced Nagios Plugins Collection)

Project Notes

Part of the Advanced Nagios Plugins Collection.

Download it here:

https://github.com/harisekhon/nagios-plugins

./check_hadoop_hdfs_webhdfs.pl –help

Nagios Plugin to check HDFS files/directories or writable via WebHDFS API or HttpFS server

Checks:

– File/directory existence and one or more of the following:
– type: file or directory
– owner/group
– permissions
– size / empty
– block size
– replication factor
– last accessed time
– last modified time

OR

– HDFS writable – writes a small canary file to hdfs:///tmp to check that HDFS is fully available and not in Safe mode (this means than enough DataNodes have checked in after startup)

Tested on CDH 4.5

usage: check_hadoop_hdfs_webhdfs.pl [ options ]

-H –host Hadoop NameNode host ($HADOOP_NAMENODE_HOST, $HADOOP_HOST, $HOST)
-P –port Hadoop NameNode port ($HADOOP_NAMENODE_PORT, $HADOOP_PORT, $PORT, default: 50070)
-w –write Write unique canary file to hdfs:///tmp to check HDFS is writable and not in Safe mode
-p –path File or directory to check exists in Hadoop HDFS
-T –type ‘FILE’ or ‘DIRECTORY’ (default: ‘FILE’)
-o –owner Owner name
-g –group Group name
-e –permission Permission octal mode
-Z –zero Additional check that file is empty
-S –size Minimum size of file
-R –replication Replication factor
-a –last-accessed Last-accessed time maximum in seconds
-m –last-modified Last-modified time maximum in seconds
-B –blockSize Blocksize to expect
-t –timeout Timeout in secs (default: 10)
-v –verbose Verbose mode (-v, -vv, -vvv …)
-h –help Print description and usage options
-V –version Print version and exit