部署cassandra集羣

部署cassandra集羣

一、環境準備

1.1、下載二進制源碼包

wget http://apache.mirrors.hoobly.com/cassandra/3.11.5/apache-cassandra-3.11.5-bin.tar.gz

1.2、節點準備

# 準備三臺節點
192.168.100.226
192.168.100.227
192.168.100.228

# ansible配置
# 因爲是測試環境，這裏就直接配置密碼，不去麻煩的配置免密驗證了。
[root@master ~]# cat /etc/ansible/hosts
[casd]
192.168.100.226 ansible_ssh_user='root' ansible_ssh_pass='test123'
192.168.100.227 ansible_ssh_user='root' ansible_ssh_pass='test123'
192.168.100.228 ansible_ssh_user='root' ansible_ssh_pass='test123'

1.3、創建cassandra用戶

# 創建用戶
ansible casd -m user -a "name=cassandra state=present"

# 修改密碼
ansible casd -m shell -a "echo cassandra | passwd --stdin cassandra"

# 將cassandra二進制包拷貝到部署節點上。
ansible casd -m copy -a "src=apache-cassandra-3.11.5.tar.gz dest=/home/cassandra/apache-cassandra-3.11.5.tar.gz"

# 解壓源碼包
ansible casd -m shell -a "cd /home/cassandra/; tar -zxvf apache-cassandra-3.11.5.tar.gz"

1.4、java環境準備

# 拷貝jdk至部署節點
ansible casd -m copy -a "src=java-1.8.0-amazon-corretto-devel-1.8.0_212.b04-2.x86_64.rpm dest=/root"

# 安裝jdk
ansible casd -m shell -a "yum install -y java-1.8.0-amazon-corretto-devel-1.8.0_212.b04-2.x86_64.rpm"

# 驗證jdk
``` bash
[root@localhost ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment Corretto-8.212.04.2 (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM Corretto-8.212.04.2 (build 25.212-b04, mixed mode)

1.5、配置用戶環境變量

# 切換用戶
[root@localhost ~]# su - cassandra 
Last login: Fri Dec  6 04:27:53 EST 2019 on pts/1

# 配置環境變量
[cassandra@localhost ~]$ vi .bash_profile
export CASSANDRA_HOME=/home/cassandra/apache-cassandra-3.11.5
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-amazon-corretto
export PATH=$JAVA_HOME/bin:$CASSANDRA_HOME/bin:$PATH

# 加載環境變量
[cassandra@localhost ~]$ source .bash_profile

二、部署cassandra

2.1、配置文件

修改配置文件 /home/cassandra/apache-cassandra-3.11.5/conf/cassandra.yaml

cluster_name: 'test'
data_file_directories:
    - /home/cassandra/apache-cassandra-3.11.5/data
commitlog_directory: /home/cassandra/apache-cassandra-3.11.5/data/commitlog
saved_caches_directory: /home/cassandra/apache-cassandra-3.11.5/data/saved_caches
seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "192.168.100.226"  # 因子
listen_address: 192.168.100.226       # 監聽地址，不可以爲127.0.0.1
start_rpc: true
rpc_address: 192.168.100.226          # rpc監聽地址，不可以爲127.0.0.1

2.2、各節點

各節點的 listen_address 和 rpc_address 需要按節點配置，且不能使用 localhost，因子 seeds 配置爲第一個啓動的節點。

First Node
--------------
seeds: "192.168.100.226"
listen_address: 192.168.100.226
rpc_address: 192.168.100.226

Second Node
---------------
seeds: "192.168.100.226"
listen_address: 192.168.100.227
rpc_address: 192.168.100.227

Third Node
---------------
seeds: "192.168.100.226"
listen_address: 192.168.100.228
rpc_address: 192.168.100.228

三、啓動cassandra服務

3.1、啓動服務

# 先啓動226, 使用-f選項啓動在前臺
/home/cassandra/apache-cassandra-3.11.5/bin/cassandra

# 再啓動其餘的節點
/home/cassandra/apache-cassandra-3.11.5/bin/cassandra
/home/cassandra/apache-cassandra-3.11.5/bin/cassandra

3.2、驗證服務

使用 nodetool status 驗證服務

[cassandra@localhost ~]$/home/cassandra/apache-cassandra-3.11.5/bin/nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address          Load       Tokens       Owns (effective)  Host ID                               Rack
UN  192.168.100.226  302.76 KiB  256          69.2%             723cb923-d19c-4dea-8124-c4503dab4d75  rack1
UN  192.168.100.227  295.05 KiB  256          66.3%             5bbeeb09-9bf4-4e45-a7a1-168e4f87186f  rack1
UN  192.168.100.228  239.96 KiB  256          64.5%             78677dd0-797e-45b0-a34a-23842927af35  rack1