Datastax-Cassandra Amazon EC2多区域设置-具有3个节点的群集

Question

I have launched 3 Amazon EC2 instance and setup datastax cassandra as follows

1.Region - US EAST:

cassandra.yaml - configuration

a.listen_address as private IP of this instance

b.broadcast_address as public IP of this instance

c.seeds as 50.XX.XX.X1, 50.XX.XX.X2 (public-ip of node1,public-ip of node2)

cassandra-rackdc.properties - configuration

dc=DC1

rack=RAC1

dc_suffix=US_EAST_1

2.Region - US WEST:

I did same procedure as I did above.

3.Region - EU IRELAND:

The result of above configuration is

All the node working good individually. But when I do

$nodetool status on all the three node

It only listing the local node only.

I tried to achieve the following things.

1. Launch 3 cassandra node in three different region. For say, US-EAST,US-WEST,EU-IRELAND.

2. With Following configuration or methodology

   a.Ec2MultiRegionSnitch

   b.Replication staragey as SimpleStrategy

   c.Replication Factor as 3

   d. Read & write level as QUORUM.

3. I wish to attain only one thing ie if any two of the region is down or any two of the node down, I can survive with renaming one node.

My Questions here are

Where I did the mistake? and How to attain my requirements?

Any help or inputs are much appreciated.

Thanks.

Answer 1

This is what worked for me with cassandra 3.0

endpoint_snitch: Ec2MultiRegionSnitch
listen_address: <leave_blank>
broadcast_address: <public_ip_of_server>
rpc_address: 0.0.0.0
broadcast_rpc_address: <public_ip_of_server>
-seed: "one_ip_from_other_DC"

Answer 2

Finally, I found the resolution of my issue. I am using replication strategy as SimpleStrategy, hence I do not require to configure cassandra-rackdc.properties .

Once, I removed the file cassandra-rackdc.properties from all node, Everything working as expected.

Thanks