卡桑德拉：什么是正确的配置EC2多地区？ [英] Cassandra: what is the correct configuration for EC2 multi-region?

问题描述

什么是正确的配置，在EC2实例的多阶区域设置？

应该采取什么listen_address，broadcast_address，rpc_address和种子的IP /地址是工作？

当你使用公网IP地址，当你使用私有IP地址？

解决方案

按照<一个href="http://www.datastax.com/documentation/cassandra/1.2/webhelp/index.html?pagename=docs&version=1.2&file=#cassandra/configuration/configCassandra_yaml_r.html">docs:

broadcast_address ：（默认： listen_address ）如果你的卡桑德拉群集部署在多个亚马逊EC2区域，并使用的EC2MultiRegionSnitch，设置broadcast_address到节点的公共IP地址和listen_address到专用IP

listen_address ：（默认：本地主机），其他卡桑德拉节点使用连接到该节点的IP地址或主机名。如果未设置，主机名必须解析该节点的使用/ etc /主机名，/ etc / hosts文件，或者DNS的IP地址。不要指定0.0.0.0。

rpc_address ：（默认：本地主机）的监听地址的客户端连接（节俭远程过程调用）。

seed_provider ：（默认：org.apache.cassandra.locator.SimpleSeedProvider）逗号分隔的主机（IP地址）的列表，以作为联络点使用，当一个节点加入集群。卡桑德拉还使用此列表来学习环的拓扑结构。运行多个节点时，必须改变 - 从种子的默认值（127.0.0.1）名单。在多个数据中心群集， - 种子列表应包括从每个数据中心的至少一个节点（复制组）

试图总结：

1. 的 rpc_address 用于客户端连接，并没有任何关系多区域EC2
2. 的 listen_address 和 broadcast_address 对于多地区EC2配置2个重要的选项

3. 在一般配置任何这些回答2个问题的时候：

   1. 谁是连接？ （另一个节点？客户？）
   2. 在什么IP地址是访问？ （可以访问谁是连接到此网络接口？）

What is the correct configuration for a mulit-region setup in EC2 instances?

What should the listen_address, broadcast_address, rpc_address and seed ip/addresses be to work?

When do you use public IP address and when do you use private IP addresses?

解决方案

According to the docs:

broadcast_address: (Default: listen_address) If your Cassandra cluster is deployed across multiple Amazon EC2 regions and you use the EC2MultiRegionSnitch, set the broadcast_address to public IP address of the node and the listen_address to the private IP.

listen_address: (Default: localhost) The IP address or hostname that other Cassandra nodes use to connect to this node. If left unset, the hostname must resolve to the IP address of this node using/etc/hostname, /etc/hosts, or DNS. Do not specify 0.0.0.0.

rpc_address: (Default: localhost) The listen address for client connections (Thrift remote procedure calls).

seed_provider: (Default: org.apache.cassandra.locator.SimpleSeedProvider) A list of comma-delimited hosts (IP addresses) to use as contact points when a node joins a cluster. Cassandra also uses this list to learn the topology of the ring. When running multiple nodes, you must change the - seeds list from the default value (127.0.0.1). In multiple data-center clusters, the - seeds list should include at least one node from each data center (replication group)

Trying to summarize:

1. the rpc_address is used for client connections and has nothing to do with multi-region EC2
2. the listen_address and broadcast_address are the 2 important options for multi-region EC2 configuration

3. in general when configuring any of these answer 2 questions:

   1. who is connecting? (another nodes? clients?)
   2. what IPs are accessible? (is this network interface accessible to who is connecting?)

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