Charlie Voiselle angrycub

HOWTO: Clean Up Nomad Data Directory

Issue

When attempting to remove all of the data in the Nomad data directory, several directories and files are unable to be deleted. Many messages are logged to the console like:

rm: cannot remove ‘alloc/736f61b9-d7dc-cb73-0dd1-76b1b2ba032d/nomad-ui/secrets’: Device or resource busy
rm: cannot remove ‘alloc/ddcf5a78-5497-f4a4-a101-221fc4e0180b/fabio/alloc’: Device or resource busy
rm: cannot remove ‘alloc/ddcf5a78-5497-f4a4-a101-221fc4e0180b/fabio/secrets’: Device or resource busy

Job Anti-Affinity in Action

Overview

This guide will walk you through creating and executing a job that will demonstrate Nomad's job anti-affinity rules and, in clusters with memory limited Nomad clients, filtering based resource exhaustion.

Sample Environment

One Nomad Server Node
Three Nomad Client Nodes
- 768 MB RAM total (providing 761 MB RAM in nomad node-status -self)

"Useful" Bookmarks

Work Stuff

Daring Fireball: Markdown Web Dingus

URL: http://daringfireball.net/projects/markdown/dingus
Description: Useful for converting Markdown syntax to corresponding HTML. Useful for creating Patch Delivery Documents since ZenDesk forums only allows for HTML and the ticket comments only allow rich text using Markdown

to-markdown - an HTML to Markdown converter written in javascript

Erlang Supervisor Ghost Montior

Applies to:

Riak EE clusters with MDC:
- 1.4.x - all versions
- 2.0.x - all versions prior to Riak 2.0.7
- 2.1.x - all version; fixed in 2.2.0

About

This workaround is a mitigation for basho/riak_kv#1178

	FROM microsoft/nanoserver

	ENV HTTP_ECHO_DOWNLOAD_URL "https://github.com/hashicorp/http-echo/releases/download/v0.2.3/http-echo_0.2.3_windows_amd64.zip"
	ENV HTTP_ECHO_PORT 8080
	ENV HTTP_ECHO_STRING "Hello World"

	RUN powershell.exe -Command ; \
	$handler = New-Object System.Net.Http.HttpClientHandler ; \
	$client = New-Object System.Net.Http.HttpClient($handler) ; \
	$client.Timeout = New-Object System.TimeSpan(0,30,0) ; \

	-module(pinger).

	-export([ping/1,
	ping/3,
	pinglist/4,
	pingall/0,
	pingall/1,
	pingall/2
	]).

	RingSize = 32,
	FirstNodeName = 'riak@127.0.0.1',
	NewRing = riak_core_claim_sim:run([
	{ring, riak_core_ring:fresh(RingSize, FirstNodeName)},
	{target_n_val,4},
	{wants,{riak_core_claim,wants_claim_v3}},
	{choose,{riak_core_claim,choose_claim_v3}},
	{cmds, [[
	{join, 'riak@127.0.0.2'},
	{join, 'riak@127.0.0.3'},

	package com.basho;

	import java.io.IOException;
	import java.io.InputStream;
	import java.io.UnsupportedEncodingException;
	import java.net.URL;
	import java.net.URLConnection;
	import java.net.URLEncoder;

	import org.apache.wink.common.internal.providers.multipart.MultiPartParser;

	%% -------------------------------------------------------------------------
	%%
	%% leveldb_stat_collector: collect statistics from leveldb internal counters
	%% to file
	%%
	%% Copyright (c) 2016 Basho Technologies, Inc. All Rights Reserved.
	%%
	%% This file is provided 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

	-module(all_atoms).

	-export([all_atoms/0, node_atoms/0, node_atoms/1]).

	atom_by_number(Index) ->
	binary_to_term(<<131,75,Index:24>>).

	all_atoms() ->
	atoms_starting_at(0).