amuraru

RPMS available at: https://raw.githubusercontent.com/amuraru/opsview-rpms/master/centos/7

How to build

Check docs

http://docs.opsview.com/doku.php?id=developer:build:rpm_opsview

Create an account with Opsview

http://www.opsview.com/products/opsview-core

amuraru

mkfs.ext4 -m 1 -T largefile -O dir_index,extent,sparse_super /dev/sdb

amuraru

import java.util.concurrent.locks.ReentrantReadWriteLock;

class CachedData {
   Object data;
   volatile boolean cacheValid;
   final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock();

   Object loadData() throws Exception {
      throw new Exception("Load Failed");
   }

amuraru

rpmrebuild -e -p  --notest-install  jdk-8u25-linux-x64.rpm

amuraru

*/5 * * * * tomcat bash -c "/usr/java/latest/bin/jstack -l `ps aux | grep org.apache.catalina.startup.Bootstrap | grep -v grep | tr -s ' ' | cut -f2 -d' '` >> `ls -d /var/log/tomcat[6-9] | head -1`/stacktrace.log"

amuraru

#!/usr/bin/env python

import sys
import jira.client as j
import getpass

JIRA_SERVER="https://issues.adobe.com"
print "Creating an issue on %s" % JIRA_SERVER

amuraru

iptables -F
iptables -X
/sbin/iptables -N INET_IN
/sbin/iptables -N INET_OUT
/sbin/iptables -A OUTPUT -j INET_OUT
/sbin/iptables -A INPUT -j INET_IN
/sbin/iptables -A INET_IN -s 10.2.122.0/24
/sbin/iptables -A INET_OUT -d 10.2.122.0/24
iptables -n -v -x -L INET_IN
iptables -n -v -x -L INET_OUT

amuraru

# Capture Thrift hex method call on a box running HBase ThriftServer
strace -f -xx  -e recvfrom -s2048 -p$(jps | grep ThriftServer | cut -f1 -d' ') 2>&1

#getColumnDescriptor .META.
echo -en "\x80\x01\x00\x01\x00\x00\x00\x14\x67\x65\x74\x43\x6f\x6c\x75\x6d\x6e\x44\x65\x73\x63\x72\x69\x70\x74\x6f\x72\x73\x00\x00\x00\x00\x0b\x00\x01\x00\x00\x00\x06\x2e\x4d\x45\x54\x41\x2e\x00" | nc localhost 9090

#getTableNames thrift call
echo -en "\x80\x01\x00\x01\x00\x00\x00\x0d\x67\x65\x74\x54\x61\x62\x6c\x65\x4e\x61\x6d\x65\x73\x00\x00\x00\x00\x00" | nc  localhost 9090

amuraru

strace -e recvfrom -s2048 -p$(ps -L -p `jps | grep ThriftServer | cut -f1 -d' '` | cut -f2 -d' ' | xargs | sed -e 's/ / -p /g') 2>&1

amuraru

egrep 'CMS-(re|ini)' `ls -1tr /var/log/hbase/gc.regionserver.201* | tail -1` | cut -d'=' -f4 | sort -n

grep -r ParNew `ls -1tr /var/log/hbase/gc.regionserver.201* | tail -1` | cut -d'=' -f4 | sort -n | tail -10