Peter N pcn

Based on https://gist.github.com/vdm/6af55e1a568de0b61882

export VER=2.16.4
apt-get install -y dkms
cd /usr/src
curl -L http://sourceforge.net/projects/e1000/files/ixgbevf%20stable/${VER}/ixgbevf-${VER}.tar.gz | sudo tar -xzf -
cd ixgbevf-${VER}
cat <<EOF > dkms.conf
PACKAGE_NAME="ixgbevf"

:
# Ensure that the queing behavior on our cassandra block device is
# tuned for ssd
for disk in $(blockdev --report | grep -v xvda | grep '/dev' | cut -d/ -f3) ; do
    echo 1 > /sys/block/$disk/queue/nomerges # SSD only! 0 on HDD
    echo 8 > /sys/block/$disk/queue/read_ahead_kb
done

# Use the TSC as the clock source instead of xen

memtable_flush_queue_size is referenced up to documentation for 2.0 but I can't find it in 2.2. 2.0: https://docs.datastax.com/en/cassandra/2.0/cassandra/configuration/configCassandra_yaml_r.html. NOPE: thobbs on #cassandra confirme that it's removed in 2.1 and on.

Something like this:

#map={s1:leader,s2:peon,s3:peon}
{% for k, v in map.items() %}
{% if v == 'leader' %}
{{ k }}
{% endif %}
{% endfor %}

I've been playing with jq, and I've been having a hard time finding examples of how it works with output from a service like AWS (which I use a lot).

Here is one I use a lot with vagrant-ec2.

When we're launching and killing a lot of instances, the AWS API is the only way to track down which instances are live, ready, dead, etc.

To find instances that are tagged with e.g. {"Key" = "Name", "Value" = "Web-00'} in the middle of a vagrant dev cycle, or a prod launch/replace cycle, you can do something like this:

You can get the instance-id of a system via curl, so something like this is an all-in-one:

ubuntu@test-aws-box$ aws ec2  describe-instances \
  --instance-id $(curl -s http://169.254.169.254/latest/meta-data/instance-id) | \
  jq '.Reservations[0].Instances[0].Tags[] | select(.Key == "Name").Value '
"the-name"

	<!--
	Licensed to the Apache Software Foundation (ASF) under one
	or more contributor license agreements. See the NOTICE file
	distributed with this work for additional information
	regarding copyright ownership. The ASF licenses this file
	to you under the Apache License, Version 2.0 (the
	"License"); you may not use this file except in compliance
	with the License. You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	#!/bin/sh
	flip() {
	echo;
	echo -en "( º_º） ┬─┬ \r"; sleep .2;
	echo -en " ( º_º） ┬─┬ \r"; sleep .2;
	echo -en " ( ºДº）┬─┬ \r"; sleep 1.2;
	echo -en " (╯'Д'）╯︵⊏ \r"; sleep .1;
	echo -en " (╯'□'）╯︵ ⊏ \r"; sleep .1;
	echo " (╯°□°）╯︵ ┻━┻"; sleep .1;
	}

	2015/12/10 11:21:47 [INFO] Terraform version: 0.6.8 f1f214f03df27c1a790980b6f050fe92a7a547bf
	2015/12/10 11:21:47 [DEBUG] Detected home directory from env var: /Users/peter.norton
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: atlas = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-atlas
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: aws = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-aws
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: azure = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-azure
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: cloudflare = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-cloudflare
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: cloudstack = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-cloudstack
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: consul = /opt/homebrew-cask/Caskroom/terraform/0.6.8/terraform-provider-consul
	2015/12/10 11:21:47 [DEBUG] Discovered plugin: digitalocean = /opt/homebrew-cask/C

	## Using Emacs CIDER as the Figwheel REPL tool

	project.clj should have this line:

	```
	:figwheel { :nrepl-port 7888 }
	```
	At the defproject-level.

	It enables external tools to connect to the Figwheel REPL. To connect