docker compose 配置
假设有两台电脑
A电脑的ip为192.168.1.100
B电脑的ip为192.168.1.103
A电脑的docker compose 配置
version: '3'
services:
cassandra:
restart: always
image: cassandra:3.11.10
hostname: cassandra1
container_name: cassandra-node-1
environment:
- CASSANDRA_BROADCAST_ADDRESS=cassandra1
- CASSANDRA_SEEDS=cassandra1,cassandra3
extra_hosts:
- "cassandra1:192.168.1.100"
- "cassandra3:192.168.1.103"
ports:
- "9042:9042"
- "7000:7000"
volumes:
- cassandra_data:/var/lib/cassandra
volumes:
cassandra_data:
B电脑的docker compose 配置
version: '3'
services:
cassandra:
restart: always
image: cassandra:3.11.10
hostname: cassandra3
container_name: cassandra-node-3
environment:
- CASSANDRA_BROADCAST_ADDRESS=cassandra3
- CASSANDRA_SEEDS=cassandra1,cassandra3
extra_hosts:
- "cassandra1:192.168.1.100"
- "cassandra3:192.168.1.103"
ports:
- "9042:9042"
- "7000:7000"
volumes:
- cassandra_data:/var/lib/cassandra
volumes:
cassandra_data:
设置内存
临时
sysctl -w vm.max_map_count=262144
永久
Disable memory paging and swapping performance on the host to improve performance.
禁用主机上的内存分页和交换性能以提高性能。
ps：这个看情况，内存大的话，也可以关掉
sudo swapoff -a
Increase the number of memory maps available to OpenSearch.
增加OpenSearch可用的内存映射数量。
# Edit the sysctl config file sudo vi /etc/sysctl.conf # Add a line to define the desired value # or change the value if the key exists, # and then save your changes. vm.max_map_count=262144 # Reload the kernel parameters using sysctl sudo sysctl -p # Verify that the change was applied by checking the value cat /proc/sys/vm/max_map_count
两边同时启动
docker compose up -d
查看集群状态
#在A机器pingB机器 docker exec -ti cassandra-node-1 cqlsh -u cassandra -pcassandra cassandra3 -e "DESCRIBE CLUSTER"
返回
Cluster: Test Cluster Partitioner: Murmur3Partitioner
连接成功，可以使用数据库连接工具插入一条数据，分别连入A和B的数据库，查看数据是否一致
