2011-06-04

Browser OS

• ​Webian Shell - A full screen web browser for devices that don't need a desktop.
  • 有點像 Google Chrome OS 的計畫，源自 Mozilla 基金會的 Chromeless 計畫 - ​http://mozillalabs.com/chromeless

Chukwa

• ​Chukwa Quick Start

Security

• ​Securing SSH On Ubuntu With WiKID Two-Factor Authentication

Ganglia

• 參考 2011-02-10 的設定，不過卻只顯示一台。重新啟動 hadoop.nchc.org.tw
• /etc/ganglia/gmond.conf

  gmond.conf

  @@ -18 +18 @@
    * of a <CLUSTER> tag.  If you do not specify a cluster tag, then all <HOSTS> will 
    * NOT be wrapped inside of a <CLUSTER> tag. */ 
   cluster { 
  -  name = "unspecified" 
  -  owner = "unspecified" 
  +  name = "hadoop" 
  +  owner = "NCHC" 
     latlong = "unspecified" 
  -  url = "unspecified" 
  +  url = "http://hadoop.nchc.org.tw" 
   } 
   
   /* The host section describes attributes of the host, like the location */ 
   host { 
  -  location = "unspecified" 
  +  location = "Taichung" 
   } 
   
   /* Feel free to specify as many udp_send_channels as you like.  Gmond 
      used to only support having a single channel */ 
   udp_send_channel { 
  -  mcast_join = 239.2.11.71 
  +#  mcast_join = 239.2.11.71 
  +  host = hadoop
     port = 8649 
  -  ttl = 1 
  +#  ttl = 1 
   } 
   
   /* You can specify as many udp_recv_channels as you like as well. */ 
   udp_recv_channel { 
  -  mcast_join = 239.2.11.71 
  +#  mcast_join = 239.2.11.71 
     port = 8649 
  -  bind = 239.2.11.71 
  +#  bind = 239.2.11.71 
   } 

• /etc/ganglia/gmeta.conf

  gmetad.conf

  @@ -1 +1 @@
   # This is an example of a Ganglia Meta Daemon configuration file
   #                http://ganglia.sourceforge.net/
   #
  -# $Id: gmetad.conf.in 1639 2008-08-09 23:30:32Z carenas $
  +# $Id: gmetad.conf.in 2014 2009-08-10 10:44:09Z d_pocock $
   #
   #-------------------------------------------------------------------------------
   # Setting the debug_level to 1 will keep daemon in the forground and
  @@ -36 +36 @@
   # data_source "my grid" 50 1.3.4.7:8655 grid.org:8651 grid-backup.org:8651
   # data_source "another source" 1.3.4.7:8655  1.3.4.8
   
  -data_source "my cluster" localhost
  +data_source "hadoop" hadoop 192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4 192.168.1.5 192.168.1.6 192.168.1.7 192.168.1.8 192.168.1.9 192.168.1.10 192.168.1.11 192.168.1.12 192.168.1.13 192.168.1.14 192.168.1.15 192.168.1.16 192.168.1.17 192.168.1.18 192.168.1.19 192.168.1.20
   
   #
   # Round-Robin Archives
  @@ -75 +75 @@
   # is always trusted. 
   # default: There is no default value
   # trusted_hosts 127.0.0.1 169.229.50.165 my.gmetad.org
  +
  +trusted_hosts 127.0.0.1 192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4 192.168.1.5 192.168.1.6 192.168.1.7 192.168.1.8 192.168.1.9 192.168.1.10 192.168.1.11 192.168.1.12 192.168.1.13 192.168.1.14 192.168.1.15 192.168.1.16 192.168.1.17 192.168.1.18 192.168.1.19 192.168.1.20
  +
   #
   #-------------------------------------------------------------------------------
   # If you want any host which connects to the gmetad XML to receive
  @@ -112 +115 @@
   # Where gmetad stores its round-robin databases
   # default: "/var/lib/ganglia/rrds"
   # rrd_rootdir "/some/other/place"
  +#
  +#-------------------------------------------------------------------------------
  +# In earlier versions of gmetad, hostnames were handled in a case
  +# sensitive manner
  +# If your hostname directories have been renamed to lower case,
  +# set this option to 0 to disable backward compatibility.
  +# From version 3.2, backwards compatibility will be disabled by default.
  +# default: 1   (for gmetad < 3.2)
  +# default: 0   (for gmetad >= 3.2)
  +case_sensitive_hostnames 1
  +

• 不過原本有把每一台 DRBL Client 的 gmond.conf 關於 host 的部份改為每一台的 hostname。不成功～
• 現在反而把每台的 gmond.conf 改成 host = hadoop 就會成功。