Cassandra - 集羣搭建 及 配置DC和rack

1. 集羣搭建
   在每個node中配置。

vim /etc/cassandra/conf/cassandra.yaml

1.1

seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "192.168.4.17, 192.168.3.51" # 修改爲集羣中可以被發現的機器，多寫幾個，用逗號隔開

1.2

listen_address: 192.168.4.17 # 本機地址

1.3

rpc_address: 192.168.4.17 # 本機地址

2. 修改 data center 和 rack

2.1

vim /etc/cassandra/conf/cassandra.yaml
endpoint_snitch: GossipingPropertyFileSnitch  # 表示使用 cassandra-rackdc.properties 文件中的配置

2.2 文件中配置不同的dc和rack

vim /etc/cassandra/conf/cassandra-rackdc.properties
dc=dc1 # 修改
rack=rack1 # 修改

2.3

vim /etc/cassandra/default.conf/cassandra-env.sh
JVM_OPTS="$JVM_OPTS -Dcassandra.ignore_dc=true -Dcassandra.ignore_rack=true"

3. 重啓服務

service cassandra restart

4. 檢驗

# nodetool status
Datacenter: dc1
===============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens       Owns (effective)  Host ID                               Rack
UN  192.168.4.13  367.34 KiB  256          100.0%            768f6ac0-3aec-40ca-bb71-f72fb8d2603c  rack2
UN  192.168.4.17  426.99 KiB  256          100.0%            e4cf6113-0f9e-4155-aa94-8c9c2119732a  rack1
Datacenter: dc2
===============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens       Owns (effective)  Host ID                               Rack
UN  192.168.3.51  367.49 KiB  256          100.0%            d3f833d9-0789-4d81-b7f7-3d0527cbeca0  rack1