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Cassandraデフォルトではリモートからアクセスできない

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はじめに

Cassandraデフォルトではリモートからアクセスできないため、インストールした後、設定ファイルを修正してから起動する必要があります。

Cassandraインストール

Dockerからインストール

docker pull cassandra

# 起動
docker run --name some-cassandra -d cassandra:latest

参考ページ: https://hub.docker.com/_/cassandra

yumでインストール

リポジトリ情報を登録する

vi /etc/yum.repos.d/cassandra.repo

下記内容を追記して保存。

[cassandra]
name=Apache Cassandra
baseurl=https://www.apache.org/dist/cassandra/redhat/311x/
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://www.apache.org/dist/cassandra/KEYS

yumでインストール実行

yum -y install cassandra

# 再読み込みする
systemctl daemon-reload

インストール完了です。

起動する

systemctl start cassandra

停止する

systemctl stop cassandra

再起動する

systemctl restart cassandra

起動ステータス確認する

systemctl status cassandra

設定変更

cassandra.yamlファイルにlisten_addressとrpc_addressを修正

listen_address

Address or interface to bind to and tell other Cassandra nodes to connect to. You must change this if you want >multiple nodes to be able to communicate!

Set listen_address OR listen_interface, not both.

Leaving it blank leaves it up to InetAddress.getLocalHost(). This will always do the Right Thing if the node is >properly configured (hostname, name resolution, etc), and the Right Thing is to use the address associated with the >hostname (it might not be).

Setting listen_address to 0.0.0.0 is always wrong.

Default Value: localhost

デフォルトはlocalhost(127.0.0.1)なので、ほかのサーバからPrivateIPでアクセスできません。
listen_address=xxx.yyy.zzz.www
のようにPrivateIPを設定。

rpc_address

The address or interface to bind the native transport server to.

Set rpc_address OR rpc_interface, not both.

Leaving rpc_address blank has the same effect as on listen_address (i.e. it will be based on the configured hostname of the node).

Note that unlike listen_address, you can specify 0.0.0.0, but you must also set broadcast_rpc_address to a value other than 0.0.0.0.

For security reasons, you should not expose this port to the internet. Firewall it if needed.

Default Value: localhost

リモートからできるようにPrivateIPを設定したほうがよいです。
rpc_address=xxx.yyy.zzz.www

設定ファイルの詳細:http://cassandra.apache.org/doc/latest/configuration/cassandra_config_file.html

以上

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