install Cassandra in Ubuntu

目標:
    利用 VirtualBox 架起兩台 ubuntu server，並且安裝 Cassandra，並設定成同一個 ring。

環境(environment):
(1) Virtual Box
(2) Ubuntu 10.04
(3) Cassandra
   
步驟:
(1) 安裝 ubuntu server * 2。
      IP 分別為 192.168.65.39 & 192.168.65.222。
(2) 分別安裝 Cassandra。
(3) 設定兩台成一個 cassandra ring。
      以 192.168.65.39 為 seed provider。

---

<安裝 ssh>

安裝 ssh (並非必要，如果安裝，可由別台連進來操作。不過，我是利用 pietty 來操作，介面似乎比較友善。):
     sudo apt-get install ssh

---

<安裝 Cassandra>
      (此段安裝步驟係參考自豆腐腦仁兄的網頁)

(1) 修改 /etc/apt/source.list ，在最後加入以下幾行:
     sudo -vim  /etc/apt/source.list

# Apache Cassandra
deb http://www.apache.org/dist/cassandra/debian 10x main
deb-src http://www.apache.org/dist/cassandra/debian 10x main

(2) 新增 apt public key:

gpg --keyserver pgp.mit.edu --recv-keys 4BD736A82B5C1B00
gpg --export --armor 4BD736A82B5C1B00|sudo apt-key add -

(3) 執行:
    sudo apt-get update

(4) 安裝 Cassandra
    sudo apt-get install cassandra

---

<設定 seed provider of Cassandra>

  修改 cassandra.yaml 中:
  (1)  listen address & rpc_address，由 127.0.0.1 改成提供服務的 IP: 192.168.65.39。

[192.168.65.39]
修改 seed provider:
sudo vi /etc/cassandra/cassandra.yaml

# Address to bind to and tell other Cassandra nodes to connect to. You
# _must_ change this if you want multiple nodes to be able to
# communicate!
#
# Leaving it blank leaves it up to InetAddress.getLocalHost(). This
# will always do the Right Thing *if* the node is properly configured
# (hostname, name resolution, etc), and the Right Thing is to use the
# address associated with the hostname (it might not be).
#
# Setting this to 0.0.0.0 is always wrong.
listen_address: 192.168.65.39

# Address to broadcast to other Cassandra nodes
# Leaving this blank will set it to the same value as listen_address
# broadcast_address: 1.2.3.4

# The address to bind the Thrift RPC service to -- clients connect
# here. Unlike ListenAddress above, you *can* specify 0.0.0.0 here if
# you want Thrift to listen on all interfaces.
#
# Leaving this blank has the same effect it does for ListenAddress,
# (i.e. it will be based on the configured hostname of the node).
rpc_address: 192.168.65.39
# port for Thrift to listen for clients on
rpc_port: 9160

---

<設定 非 seed 之 Cassandra note>

  修改 cassandra.yaml :
  (1) 變成非 seed provider:
        新增一行:   auto_bootstrap: true
        修改 seed provider IP: -seeds: "192.168.65.39"
  (2) listen address & rpc_address，由 127.0.0.1 改成提供服務的 IP: 192.168.65.222。

[192.168.65.222]
sudo vi /etc/cassandra/cassandra.yaml

auto_bootstrap: true

# any class that implements the SeedProvider interface and has a
# constructor that takes a Map of parameters will do.
seed_provider:
    # Addresses of hosts that are deemed contact points.
    # Cassandra nodes use this list of hosts to find each other and learn
    # the topology of the ring.  You must change this if you are running
    # multiple nodes!
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          # seeds is actually a comma-delimited list of addresses.
          # Ex: ",,"
          - seeds: "192.168.65.39"# Address to bind to and tell other Cassandra nodes to connect to. You
# _must_ change this if you want multiple nodes to be able to
# communicate!
#
# Leaving it blank leaves it up to InetAddress.getLocalHost(). This
# will always do the Right Thing *if* the node is properly configured
# (hostname, name resolution, etc), and the Right Thing is to use the
# address associated with the hostname (it might not be).
#
# Setting this to 0.0.0.0 is always wrong.
listen_address: 192.168.65.222

# Address to broadcast to other Cassandra nodes
# Leaving this blank will set it to the same value as listen_address
# broadcast_address: 1.2.3.4

# The address to bind the Thrift RPC service to -- clients connect
# here. Unlike ListenAddress above, you *can* specify 0.0.0.0 here if
# you want Thrift to listen on all interfaces.
#
# Leaving this blank has the same effect it does for ListenAddress,
# (i.e. it will be based on the configured hostname of the node).
rpc_address: 192.168.65.222
# port for Thrift to listen for clients on
rpc_port: 9160

---

兩台(Cassandra seed provider & node) server 都必須重啟 Cassandra service/daemon:


<重啟 cassandra>
    sudo /etc/init.d/cassandra restart


檢視各自 server 之 ring 資訊:
   nodetool -host 192.168.65.39 ring
   nodetool -host 192.168.65.222 ring

Address         DC          Rack        Status State   Load            Owns    Token
192.168.65.222  datacenter1 rack1       Up     Normal  15.59 KB        98.50%  16917884686989398188502009278395938584
192.168.65.39   datacenter1 rack1       Up     Normal  15.59 KB        1.50%   19466790643224777069019173699377938218

至此，已完成。