下載 cassandra images

docker pull cassandra

run cassandra

docker run --name test-cassandra-1 -d cassandra

run cassandra cluster

有 2 種 :

  1. 在同一台機器建不同 instances 
    docker run --name test-cassandra-2 -d -e CASSANDRA_SEEDS="$(docker inspect --format='' test-cassandra-1)" cassandra

    啟動後

    > docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                         NAMES
87e56257fb9e        cassandra           "docker-entrypoint.s…"   3 seconds ago       Up 2 seconds        7000-7001/tcp, 7199/tcp, 9042/tcp, 9160/tcp   test-cassandra-2
abcd5d24e322        cassandra           "docker-entrypoint.s…"   5 minutes ago       Up 5 minutes        7000-7001/tcp, 7199/tcp, 9042/tcp, 9160/tcp   test-cassandra-1

    也可以透過 –link

    docker run --name test-cassandra-2 -d --link test-cassandra-1 cassandra
  2. 在不同機器建不同的 instances，這邊先不實作提供指令參考 
    docker run --name some-cassandra -d -e CASSANDRA_BROADCAST_ADDRESS=10.42.42.42 -p 7000:7000 cassandra:tag
docker run --name some-cassandra -d -e CASSANDRA_BROADCAST_ADDRESS=10.43.43.43 -p 7000:7000 -e CASSANDRA_SEEDS=10.42.42.42 cassandra:tag

root@d0447e24625d:/# nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address     Load       Tokens       Owns (effective)  Host ID                               Rack
UN  172.17.0.3  75.19 KiB  256          52.1%             c4cd5109-83ff-4adc-81d1-7d05b7dd2bfb  rack1
UN  172.17.0.2  80.16 KiB  256          47.9%             0dc02012-3b01-4bd2-bcf4-65855f630e9a  rack1

連線 cassandra

> docker run -it --link test-cassandra-1:cassandra --rm cassandra sh -c 'exec cqlsh "$CASSANDRA_PORT_9042_TCP_ADDR"'
Connected to Test Cluster at 172.17.0.2:9042.
[cqlsh 5.0.1 | Cassandra 3.11.3 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.
cqlsh>

透過 exec 連線 cassandra，再下 cqlsh

docker exec -it eb31ab378632 bash

root@eb31ab378632:/# cqlsh
Connected to Test Cluster at 127.0.0.1:9042.
[cqlsh 5.0.1 | Cassandra 3.11.3 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.
cqlsh>

查看目前有的 keyspaces

cqlsh> describe keyspaces;
system_schema  system_auth  system  system_distributed  system_traces

建立 keyspace

cqlsh> CREATE KEYSPACE castest WITH REPLICATION = {'class': 'SimpleStrategy', 'replication_factor': 1 };

drop keyspace

cqlsh> drop keyspace castest ;

create table

cqlsh> CREATE TABLE castest.prod (prodid text PRIMARY KEY, count int);

看所有 tables

cqlsh> describe tables ;

Keyspace castest
----------------
prod

insert data

cqlsh> INSERT INTO castest.prod (prodid, count) VALUES ('1', 20);

select data

cqlsh> select * from castest.prod ;

 prodid | count
--------+-------
      4 |    30
      3 |    40
      2 |    10
      1 |    20

(4 rows)

update data

cqlsh> update castest.prod set count=55 where prodid='3'

delete data

cqlsh> delete from castest.prod where prodid='3' ;

參考資料
docker-cassandra
Deploy Spark with Cassandra cluster configur cassandra cluster with docker