[Enhancement]: Use DNS for all node registration (for master, metanode, authnode, etc)

[Zorlin]

Contact Details

zorlin@gmail.com

Is there an existing issue for this?

• I have searched all the existing issues

What would you like to be added?

I would like us to be able to use DNS records to allow nodes to find each other.

For example, instead of your authnode config looking like this:

{
  "role": "authnode",
  "ip": "10.0.20.91",
  "port": "8443",
  "prof": "10088",
  "id": "91",
  "peers": "91:10.0.20.91:8443,92:10.0.20.92:8443,93:10.0.20.93:8443",
  "logDir": "/var/log/cubefs/authnode",
  "logLevel": "info",
  "retainLogs": "100",
  "walDir": "/var/lib/cubefs/authnode/raft",
  "storeDir": "/var/lib/cubefs/authnode/rocksdbstore",
  "exporterPort": 9510,
  "clusterName": "rifflabs-per",
  "authServiceKey": "REPLACE-ME-WITH-YOUR-KEY",
  "authRootKey": "REPLACE-ME-WITH-YOUR-KEY",
  "enableHTTPS": true
}

It could look like this:

{
  "role": "authnode",
  "ip": "10.0.20.91",
  "port": "8443",
  "prof": "10088",
  "id": "91",
  "peers": "authnode.cfs.riff.cc:8443",
  "logDir": "/var/log/cubefs/authnode",
  "logLevel": "info",
  "retainLogs": "100",
  "walDir": "/var/lib/cubefs/authnode/raft",
  "storeDir": "/var/lib/cubefs/authnode/rocksdbstore",
  "exporterPort": 9510,
  "clusterName": "rifflabs-per",
  "authServiceKey": "REPLACE-ME-WITH-YOUR-KEY",
  "authRootKey": "REPLACE-ME-WITH-YOUR-KEY",
  "enableHTTPS": true
}

Why is this needed?

This would vastly simplify the process of specifying IP addresses for nodes or changing what IP addresses are used for nodes.

Anything else?

No response

[Zorlin]

You can specify multiple hosts in one DNS record (or rather, several DNS records with the same name, all of A or AAAA type), so this would allow you to simply specify all your authnodes as one record, all of your masters as another, etc.

[leonrayang]

@Zorlin Authnode and Master are functional modules, stateless. Master can configure domain names and currently supports it. As for Authnode, it is not very clear, and it is not widely used at the moment. Have you tried it yourself?

[Zorlin]

@Zorlin Authnode and Master are functional modules, stateless. Master can configure domain names and currently supports it. As for Authnode, it is not very clear, and it is not widely used at the moment. Have you tried it yourself?

What I have in mind is being able to simply declare a DNS name for each component, instead of having to specify each in the config files. Referring to them by name is fine, but I want a single DNS name that has multiple A records behind it, and to be able to change my masters by simply editing DNS and waiting.

Yes, I use authnode regularly :)

[Bmixo]

is that meaning everyone could connect to the master node and data node at persent,because i didnot see any verify key setting for now