Hi Simon, if your nodes need to find each other by IP address you should use -name. You can specify it in VM.args like
-name couchdb@<the IP address> There shouldn't be a need to change the "couchdb@" element for each node unless you want to run multiple nodes on the same IP (not recommended). When you add the peer nodes into the _nodes database you should use the same format; each document should have an ID like "couchdb@<the IP address>". The firewall ports look fine provided that your vm.args file includes these lines -kernel inet_dist_listen_min 9100 -kernel inet_dist_listen_max 9200 Cheers, Adam > On Oct 25, 2016, at 1:17 AM, Simon Keary <ske...@immersivetechnologies.com> > wrote: > > > > Hi All, > > I'm trying to setup a test CouchDB cluster across two machines and struggling > to get it working and understanding how the node names work. I'm am able to > sucessfully call the _nodes endpoint on one of the machines to add the other > but I don't think this is doing the right thing since the cluster_nodes array > is updated with the new node but the all_nodes array isn't... > > Where I think I'm going wrong is setting the node names in the the vm.args > files and then specifying the correct node name when trying to add the second > machine to the first instance. In my case the machines have host names but > neither machine can contact the other via this and can only contact the other > via IP address. Ideally I'd only like the machines to connect to each other > via IP and not host name as this will make maintenance of the cluster much > simpler going forward. In this situation I'm not sure of: > > * Whether I should be setting -sname or -name in vm.args. When using -name, > my testing suggests I should use a name of the form "node1" with no @ symbol. > Is this right? > * For -name I'm not sure whether it's supposed to be "node1@<the ip address>" > or "node1@<the hostname>" or "node1@localhost"? > * Once I've set the name I'm not sure how to refer to the other node when > trying to add it via curl. If I've used -sname should I just use the short > name (e.g. "node2") or "node2@<the ip address>"? If -name is used in vm.args > is the correct thing to do to use "node2@<the ip address>"? > > I don't believe I have a connectivity issue between the nodes but the ports > that are open between them are 4369, 5984, 5986, 9100-9200 (all TCP) and all > UDP. > > When trying to remove the node, to try further variants to see if they work, > I get an error about a document conflict. I suspect this is because CouchDB > is getting into a strange state but this makes a trial and error process of > figuring out how the node names work as difficult to say the least. > > Any help would be appreciated - Thanks! > Simon > > > > > Disclaimer: > This message contains confidential information and is intended only for the > individual(s) named. If you are not the named addressee you should not > disseminate, distribute or copy this email. Please immediately delete it and > all copies of it from your system, destroy any hard copies of it, and notify > the sender. Email transmission cannot be guaranteed to be secure or > error-free as information could be intercepted, corrupted, lost, destroyed, > arrive late or incomplete, or contain viruses. To the maximum extent > permitted by law, Immersive Technologies Pty. Ltd. does not accept liability > for any errors or omissions in the contents of this message which arise as a > result of email transmission.
