On 01.06.2018 16:35, Ronja Koistinen wrote: > Hello, > > I am running Solr Cloud 6.6.4 in Docker containers on three RHEL7 > virtual machines. The containers are networked in bridge mode. > > I can access the Solr Admin web interface on the nodes and I can see all > nodes in the /live_nodes tree in ZooKeeper. > > ZooKeeper is installed directly on the host virtual machines, i.e. > ZooKeeper is not in containers, only the Solr nodes are. > > When I try to create a new collection through > /solr/admin/collections?action=CREATE I get the error > "SolrServerException:Server refused connection at http://node1:8984/solr";. > > Please see attached log files. I tried to identify the relevant portions > from my Solr logs so not everything is included. (The logs have also > been slightly edited to conceal potentially sensitive information and > actual hostnames.) > > Troubleshooting so far: "wget" inside the Solr container on node0 is > able to connect to the Solr containers running on node1 and node2, so it > should not be a routing or firewall issue. >
I believe I have solved my issue: the "connection refused" occurs when Solr tries to connect to itself by using the IP address (or DNS name) of the same host it is running on. I remedied this by allowing traffic from the "docker0" interface to the Solr ports of the containers on the same host: -i docker0 -p tcp -m conntrack --ctstate NEW -m tcp --dport 8984 -j ACCEPT -- Ronja Koistinen University of Helsinki
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