Dhanasekaran Anbalagan bugcy013

Currently, there is an explosion of tools that aim to manage secrets for automated, cloud native infrastructure management. Daniel Somerfield did some work classifying the various approaches, but (as far as I know) no one has made a recent effort to summarize the various tools.

This is an attempt to give a quick overview of what can be found out there. The list is alphabetical. There will be tools that are missing, and some of the facts might be wrong--I welcome your corrections. For the purpose, I can be reached via @maxvt on Twitter, or just leave me a comment here.

There is a companion feature matrix of various tools. Comments are welcome in the same manner.

how switch master/slave between replSet model on mongodb

http://www.cnblogs.com/shihao/archive/2013/01/25/2876727.html

assume

Physical machine 192.168.10.168 ubuntu 13.04
- alway as master db
virtual machine 192.168.10.167 ubuntu 13.04

#MongoDB 3.2.x Reporting The find() operator creates a cursor to the data. The client can then parse through the data and do calculations on the data for reports purposes. However, with large data sets this is not practical. It makes far more sense for the server to do the calculations and return the result. This can save a considerable amount of unnecessary network traffic. You can however run the count on the cursor without much overhead.

db.mycollection.find().count()

Mongo has two other methods for reporting on data:

Aggregation
Map-Reduce

#MongoDB 3.2.x Security

##Network Ports The standard ports used by mongo are:

Process	Role	Default Port

#MongoDB 3.2.x Logging The main log file is the mongod.log. You can specify the log file location when you are starting the mongod process but if you have installed on Ubuntu from a package then you log file will normally be located in /var/log/mongodb/mongod.log.

You can tail the log file using:

tail -f /var/log/mongodb/mongod.log

From the Mongo shell you can also view the log file using:

show logs

	Tips to pass Certified Kubernetes Application Developer (CKAD) exam

	Getting started Kubernetes :-
	a) Book : Kubernetes: Up & Running
	b) Practice practice & practice with CKAD Exercises
	the Best Kubernetes CKAD sample exercises which cover all parts of the exam https://github.com/dgkanatsios/CKAD-exercises.
	c) Again, the best practice is use kubectl command well. Use kubectl to create resources (such as deployment, service, cronjobs, secret, configmap…) instead of creating them from manifest files.
	Incase you have to edit manifest, use dry-run and -o yamlto save yaml file then edit manifest files.
	d) Kubernetes in Action by Mario Luksa. The book is the holy bible of Kubernetes, and it basically answer all questions you may have ;
	e) Whether or not you use Kubernetes at work, you should still provision your own cluster somewhere and play with it.

	#!/bin/bash
	#
	# Copyright (c) 2014, Intel Corporation
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#
	# * Redistributions of source code must retain the above copyright notice,
	# this list of conditions and the following disclaimer.
	# * Redistributions in binary form must reproduce the above copyright

	#!/bin/sh

	set -e
	set -o pipefail

	hostname=$2
	RET=`/usr/bin/mk-heartbeat --database test --table heartbeat --user <user> --pass <pass> --host $hostname --check \| sed -r -e 's, ,,g'`
	RETVAL="$?"
	if [ "$RETVAL" != "0" ]; then
	exit $RETVAL

	# Convert your notebook to an interactive webpage
	#
	# Attached a notebook (really-interactive-posts.ipynb) and the generated
	# output (really-interactive-posts.html). The thebe.tpl template file is
	# at the very end of the gist.

	$ jupyter nbconvert --template thebe.tpl --to html <notebook.ipynb>


	# You can open the generated webpage locally file://... howerver some

	#!/bin/bash

	# References
	# http://www.computerhope.com/unix/nc.htm#03
	# https://github.com/daniloegea/netcat
	# http://unix.stackexchange.com/questions/26715/how-can-i-communicate-with-a-unix-domain-socket-via-the-shell-on-debian-squeeze
	# http://unix.stackexchange.com/questions/33924/write-inside-a-socket-open-by-another-process-in-linux/33982#33982
	# http://www.linuxjournal.com/content/more-using-bashs-built-devtcp-file-tcpip
	# http://www.dest-unreach.org/socat/
	# http://stuff.mit.edu/afs/sipb/machine/penguin-lust/src/socat-1.7.1.2/EXAMPLES