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Vespa configserver #9681

Closed yyangliu closed 5 years ago

yyangliu commented 5 years ago

Hello! I installed a vespa cluster, in the services.xml I configed admin cluster as follows:

\<services version="1.0"> \<admin version="2.0"> \<adminserver hostalias="admin0"\/> \<configservers> \<configserver hostalias="admin0"\/> \</configservers> \</admin> ... \</services>

Only one configserver "admin0" was added, but I can see a configserver process on every content node, I'm confused about this, can you help? Thank u very much!

yyangliu commented 5 years ago

By the way, when I execute vespa-deploy and activate, a WARING: Host named 'vespa1' may not receive any config since it is not a canonical hostname. What does it mean?

jobergum commented 5 years ago

What distribution are you running? Docker vespa image or rhel packages (see https://docs.vespa.ai/documentation/vespa-quick-start-multinode-aws.html). The configuration server should not run on any node, but there is a configuration proxy service on each node.

The warning is issued when the registered dns (fqdn) does not match the hostname of the node.

yyangliu commented 5 years ago

Thanks for your reply,! I followed the guide in https://docs.vespa.ai/documentation/multinode-systems.html to install my cluster. I'm running vespa image on 3 nodes and each node has 2 vespa docker installed, I configed only one configserver. I think vespa-deploy prepare and activate should only be executed on the configserver node, but it doesn't take effect. As to the "WARING: Host named 'vespa1' may not receive any config since it is not a canonical hostname.", I checked fqdn matches the hostname of the node.

jobergum commented 5 years ago

If you want to run docker and a multi node setup each docker container instance needs a IP address and that each running docker instance can talk to each other. See also https://github.com/vespa-engine/sample-apps/tree/master/basic-search-on-docker-swarm

yyangliu commented 5 years ago

Thanks very much for your reply, I checked the source code about "WARING: Host named 'vespa1' may not receive any config since it is not a canonical hostname." and found that when hostname has no dot, this warning will be printed.

yyangliu commented 5 years ago

Hello! As to <adminserver hostalias="admin0"\/>, I didn't understand what the adminserver is for? and I found no adminserver process? What's the difference between adminserver and configserver?

jobergum commented 5 years ago

Great question, there is no adminserver process. It's just a logical syntax so if you define it and don't define e.g configserver/logserver services they are placed on the node defined with adminserver.

yyangliu commented 5 years ago

OK, Thx very much!