Buvanesh Kumar sbuvaneshkumar

🎯

Chasing dreams

sbuvaneshkumar / docker_and_docker_compose

Last active May 4, 2019 06:14

Docker compose and Docker

	yum remove -y docker \
	docker-client \
	docker-client-latest \
	docker-common \
	docker-latest \
	docker-latest-logrotate \
	docker-logrotate \
	docker-engine
	yum install -y yum-utils \
	device-mapper-persistent-data \

sbuvaneshkumar / nodejs_installation

Created May 2, 2019 06:51

nodejs_installation

	yum install -y gcc-c++ make
	curl -sL https://rpm.nodesource.com/setup_8.x \| sudo -E bash -
	yum install -y nodejs

sbuvaneshkumar / k8s-issues-fix

Created May 1, 2019 14:59

Kubernetes issues encountered and fix

	1. error: unable to upgrade connection: pod does not exist
	$ kubectl exec -it busybox -- sh
	error: unable to upgrade connection: pod does not exist

	student@ubuntu:~$ kubectl get nodes -o wide
	NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
	ubuntu Ready master 22d v1.13.1 10.0.2.15 <none> Ubuntu 16.04.6 LTS 4.4.0-142-generic docker://18.9.2
	worker1 Ready <none> 22d v1.13.1 10.0.2.15 <none> Ubuntu 16.04.6 LTS 4.4.0-142-generic docker://18.9.2

	INTERNAL-IP of both master and worker node are same, I had to change the MAC address of worker1 node and also added hostname of worker1 and master node

sbuvaneshkumar / minishift.sh

Last active December 30, 2018 16:10

	yum update -y
	yum install -y wget qemu-kvm qemu-img virt-manager libvirt libvirt-python libvirt-client virt-install virt-viewer bridge-utils libvirt-daemon-kvm qemu-kvm
	usermod -a -G libvirt $(whoami)
	newgrp libvirt

	systemctl enable --now libvirtd

	curl -L https://github.com/dhiltgen/docker-machine-kvm/releases/download/v0.10.0/docker-machine-driver-kvm-centos7 -o /usr/local/bin/docker-machine-driver-kvm
	chmod +x /usr/local/bin/docker-machine-driver-kvm

sbuvaneshkumar / dhcpd.conf

Created November 24, 2018 10:25

Sample dhcpd.conf file

	#
	# DHCP Server Configuration file.
	# see /usr/share/doc/dhcp-server/dhcpd.conf.example
	# see dhcpd.conf(5) man page
	# default lease time

	default-lease-time 600;
	# max lease time

	max-lease-time 7200;

sbuvaneshkumar / Jenkins_errors

Created November 14, 2018 07:03

	1. server certificate verification failed
	git config --global http.sslverify false
	export GIT_SSL_NO_VERIFY=1

sbuvaneshkumar / errata-tool

Created November 13, 2018 08:43

	yum install gcc python-devel krb5-devel krb5-workstation python-devel python-pip -y
	pip install errata-tool

sbuvaneshkumar / minikube

Last active June 2, 2019 12:55

	yum install -y qemu-kvm qemu-img virt-manager libvirt libvirt-python libvirt-client virt-install virt-viewer bridge-utils libvirt-daemon-kvm qemu-kvm
	usermod -a -G libvirt $(whoami)
	newgrp libvirt

	systemctl enable --now libvirtd

	cat <<EOF > /etc/yum.repos.d/kubernetes.repo
	[kubernetes]
	name=Kubernetes
	baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64

sbuvaneshkumar / perf-tool.py

Created November 10, 2018 13:41 — forked from brandtg/perf-tool.py

A script that runs Netflix's "Linux Performance Analysis in 60,000 Milliseconds"

	#!/usr/bin/env python
	#
	# A script that runs the commands to perform Netflix's
	# "Linux Performance Analysis in 60,000 Milliseconds"
	#
	# (http://techblog.netflix.com/2015/11/linux-performance-analysis-in-60s.html)
	#
	import subprocess
	import datetime
	import argparse

sbuvaneshkumar / increase-volume-more-than-100-percent

Created September 16, 2018 08:22

pactl set-sink-volume alsa_output.pci-0000_00_1b.0.analog-stereo 150%