Wednesday, September 10, 2014

Shell Script to get the status of HBase Cluster

#/bin/bash
bin=`dirname $0`
bin=`cd $bin;pwd`

HADOOP_HOME=/home/bigdata/installs/hadoop-1.2.1
HBASE_HOME=/home/bigdata/installs/hbase-0.94.20
DFS_REMAINING_WARNING=15
DFS_REMAINING_CRITICAL=5
ABNORMAL_QUERY="INCONSISTENT|CORRUPT|FAILED|Exception"

# hbck and fsck report
output=/home/bigdata/hdfscluster/cluster-status
$HBASE_HOME/bin/hbase hbck >> $output
$HADOOP_HOME/bin/hadoop fsck /hbase >> $output

# check report
count=`egrep -c "$ABNORMAL_QUERY" $output`
if [ $count -eq 0 ]; then
echo "[OK] Cluster is healthy." >> $output
else
echo "[ABNORMAL] Cluster is abnormal!" >> $output

# Get the last matching entry in the report file
last_entry=`egrep "$ABNORMAL_QUERY" $output | tail -1`
echo "($count) $last_entry"
exit $STATE_CRITICAL
fi

# HDFS usage
dfs_remaining=`curl -s http://hbase-karthik:50070/dfshealth.jsp |egrep -o "DFS Remaining%.*%" | egrep -o "[0-9]*\.[0-9]*"`
dfs_remaining_word="DFS Remaining%: ${dfs_remaining}%"
echo "$dfs_remaining_word" >> $output

# check HDFS usage
dfs_remaining=`echo $dfs_remaining | awk -F '.' '{print $1}'`
if [ $dfs_remaining -lt $DFS_REMAINING_CRITICAL ]; then
echo "Low DFS space. $dfs_remaining_word"
exit_status=$STATE_CRITICAL
elif [ $dfs_remaining -lt $DFS_REMAINING_WARNING ]; then
echo "Low DFS space. $dfs_remaining_word"
exit_status=$STATE_WARNING
else
echo "HBase check OK - DFS and HBase healthy.
$dfs_remaining_word"
exit_status=$STATE_OK
fi
exit $exit_status

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