20121228 貓空 煎茶院

20121228 貓空 煎茶院
久聞貓空大名，
還沒機會上去。

這次剛好跟上團，
不過，現在年輕人不喝茶嗎？

同行有念政大的，
都大說，怎麼會沒有人呢？

哈哈哈哈

唉～果然是懷念起，在東海時，
煮茶論劍的時代了。
暢聊一夜未眠，人生一大樂事。

[hadoop]hdfs namenode.SafeModeException

在資料丟失達一定比例的時候，
namenode會進入safemode。

這時候可以採用

hadoop dfsadmin -safemode leave


or

dfs.safemode.threshold.pct

[linux]PHP Fatal error: Class 'DOMDocument' not found

PHP Fatal error: Class 'DOMDocument' not found

yum install php-xml

[電影]第一次

"既然現實是我們無法改變的，倒不如改變我們面對現實的態度。總是抱怨生活不完美的人，是永遠也看不到生活的美麗的。"

‎"你一個小屁孩少在我面前裝老練"

from "第一次"

[電影]第一次

"既然現實是我們無法改變的，倒不如改變我們面對現實的態度。總是抱怨生活不完美的人，是永遠也看不到生活的美麗的。"

‎"你一個小屁孩少在我面前裝老練"

from "第一次"

20121221 世界末日

20121221 世界末日

馬雅曆的新紀元開始了

2012年預言或2012年現象（2012 phenomenon）是一個關於末世論的預言、信仰或傳說、謠言，宣稱美洲的瑪雅文明中的瑪雅曆長達5,126年週期的結束，預言了地球、世界和人類社會在2012年12月21日之時前後數天之內將會發生全球性的災難性變化。此說法與太陽風暴、尼比魯碰撞、地球磁極反轉、網路機器人工程的預言等謠言結合，而成為2012年「世界末日說／人類滅亡說/人類重生說」，但至今目前為止，此說為社會各界認定是為一門偽科學，也是民間科學愛好者的次文化之一。[1]

[elasticsearch]Too many active ES requests, blocking now

Too many active ES requests, blocking now. {:inflight_requests=>50, :max_inflight_requests=>50, :level=>:info, :file=>"/opt/logstash/lib/logstash-1.1.5-monolithic.jar!/logstash/outputs/elasticsearch.rb", :line=>"150", :method=>"receive"}

[elasticsearch]BroadcastShardOperationFailedException[ No active shard(s)]

BroadcastShardOperationFailedException[ No active shard(s)]

[puppet]如何使用 Example42 的 Puppet 模块 | vpsee.com http://www.vpsee.com/2012/05/using-puppet-modules-from-example42/

如何使用 Example42 的 Puppet 模块 | vpsee.com
http://www.vpsee.com/2012/05/using-puppet-modules-from-example42/

[puppet]puppet import include

Puppet class inheritance confusion - Server Fault
http://serverfault.com/questions/197909/puppet-class-inheritance-confusion


The difference between import and include statemens is:

import works with files, and does not execute classes
include executes classes
files must be imported before the classes can be included
Note: there is a very strong exception to the last rule: Puppet module lookup. include statement does automatic imports in many situations. Here are some of them:

include foo tries to import the file module_dir/foo/manifests/init.pp
include foo::bar imports module_dir/foo/manifests/bar.pp

[puppet]puppet plusignment "+>"

There are other ways to use inheritance. In Puppet 0.23.1 and higher, it’s possible to add values to resource parameters using the ‘+>’ (‘plusignment’) operator:


class apache {
service { 'apache': require => Package['httpd'] }
}

class apache-ssl inherits apache {
# host certificate is required for SSL to function
Service['apache'] { require +> File['apache.pem'] }
}



[puppet]puppet note :: The double colon that divides the sections of a class’s name is called the namespace separator.

[puppet]
puppet note "::"
The double colon that divides the sections of a class’s name is called the namespace separator.

Module Fundamentals — Documentation — Puppet Labs
http://docs.puppetlabs.com/puppet/2.7/reference/modules_fundamentals.html

[puppet]puppet Serving Module Files

That is to say, if a module named test_module is installed in the central server’s /etc/puppet/modules directory,

the following puppet: URI…

puppet:///modules/test_module/testfile.txt

All puppet file server URIs are structured as follows:

puppet://{server hostname (optional)}/{mount point}/{remainder of path}

The Puppet File Server — Documentation — Puppet Labs
http://docs.puppetlabs.com/guides/file_serving.html