cassandra - 如何在 cassandra 中使用 puppet 分配 initial_token 值

Question

我想使用 puppet 自动化分配文件中的initial_token值。cassandra.yaml谁能告诉我该怎么做。

我不能使用虚拟节点，因为 hadoop 和 solr 节点不支持 vnode。

示例：如果我有一个数组：

['-9223372036854775808', '-3074457345618258603', '3074457345618258602']

我需要将每个值分配给每个节点。

Answer 1

You could store that array in a variable in the manifest.

EDIT: if using Cassandra =< 1.2 most Puppet Cassandra modules should have a parameter to set this option. So you could then pass a value from the array into there. For example: https://forge.puppetlabs.com/gini/cassandra

If you're not using a module to set up Cassandra already with this as a parameter, you could create a template of the Cassandra.yaml and just use ERB to input a value from that array into the template.

http://docs.puppetlabs.com/guides/templating.html

EDIT:

Now I am back at a PC I can think a bit more. The instant solution I can think of is to define the tokens in a hash of either node IP address or node hostname => token - '127.0.0.1' => '-9223372036854775808'. This could be created in the manifest or you can do it via Hiera. If in Hiera, you'll need to extract it into a variable anyway in the manifest.

Then in the template you should be able to reference it with <%= variableName[@::ipaddress_eth0] %> for example.