very confused about what to put in MAPR_EXTERNAL

[Tim11]

Hi,

I'm trying to make the correct value for MAPR_EXTERNAL On this page it says 

Do NOT use DNS names. The specified node names need to match the host name you specified for the host earlier in Node Configuration.

yet on this page, it says 

When you install a MapR cluster and you specify the host names using the MapR Installer or the configure.sh script, use fully qualified domain names (FQDNs). 

So does hostname=FQDN or not?  Let me cut to the chase. Is this a valid line to add to env_override.sh

export MAPR_EXTERNAL="ec2-54-200-247-10.us-west-2.compute.amazonaws.com:54.200.247.10,ec2-35-163-153-190.us-west-2.compute.amazonaws.com:35.163.153.190,ec2-18-236-148-124.us-west-2.compute.amazonaws.com:18.236.148.124"

thanks,

Tim

[Shishir_Prakash]

Hi Tim,

You can use FQDN for internal as well as external subnet/interface of the aws nodes. You can keep MAPR_EXTERNAL as you mentioned in the comment.

I understand you are trying to use rest commands you get cldbmaster and that return’s an internal hostname and that should be fine actually because that is support to be an administrative command’s output.

As long as you have configured your client nodes and provided public hostnames in client’s mapr-clusters.conf they should be able to communicate to the cluster and should be able to perform Read/write ops.

Are you looking for option’s to retrieve cldbmaster’s public hostname when performing REST api call from client node OR that was just a test?

Note: The whole purpose of using MAPR_EXTERNAL to be able to allow the clients to access the mapr cluster assuming those clients are sitting behind the NAT or firewalls and can only interact to public IPs/hostnames.

--
Thanks
Shishir Prakash
Manager US Support

[Tim11]

@Shishir_Prakash 

Shishir,

Well whenever I try to do a hadoop fs -ls command I get my listing but also this

2023-07-26 16:49:17,9608 MAPR_EXTERNAL: Invalid character e found

And then I realized that the page I referenced above says  

Specify a comma-separated list of tuples of host names and external IP addresses. For example:
node1:1.1.1.1,node2:1.1.1.2,node3:1.1.1.3

But this page says 

The value for this environment variable is a comma-separated list of IP addresses; you cannot specify the hostname as value. For example:

ip1,ip2,ip3; <Tim11:This one ends with a semicolon>
For example, you can specify the IP addresses of the IGbE NICs (shown in the illustration above) as the value for this environment variable to allow external or low-performance clients to communicate with the cluster nodes.

export MAPR_EXTERNAL=10.11.0.0 <Tim11: This one does not end in a semicolon>

Also this page says

MAPR_EXTERNAL	10.10.123.25,10.10.123.30	If your cluster nodes have multiple NICs, use the MAPR_EXTERNAL environment variable to grant external clients access to a cluster node on specific IP addresses. The value of the MAPR_EXTERNAL environment variable on a node is a comma-separated list of up to four IP addresses with no spaces.

When I try the second one, the cluster won't even restart. So what's the right answer or more specifically which documentation page should I use?

thanks,

Tim