我要评论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
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