| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| === Cluster setup |
| |
| Context server relies on Elasticsearch to discover and configure its cluster. You just need to install multiple context |
| servers on the same network, and enable the discovery protocol in $MY_KARAF_HOME/etc/org.apache.unomi.persistence.elasticsearch.cfg file : |
| |
| [source] |
| ---- |
| discovery.zen.ping.multicast.enabled=true |
| ---- |
| |
| All nodes on the same network, sharing the same cluster name will be part of the same cluster. |
| |
| ==== Recommended configurations |
| |
| It is recommended to have one node dedicated to the context server, where the other nodes take care of the |
| Elasticsearch persistence. The node dedicated to the context server will have node.data set to false. |
| |
| ===== 2 nodes configuration |
| |
| One node dedicated to context server, 1 node for elasticsearch storage. |
| |
| Node A : |
| |
| [source] |
| ---- |
| node.data=true |
| numberOfReplicas=0 |
| monthlyIndex.numberOfReplicas=0 |
| ---- |
| |
| Node B : |
| |
| [source] |
| ---- |
| node.data=false |
| numberOfReplicas=0 |
| monthlyIndex.numberOfReplicas=0 |
| ---- |
| |
| ===== 3 nodes configuration |
| |
| One node dedicated to context server, 2 nodes for elasticsearch storage with fault-tolerance |
| |
| Node A : |
| |
| [source] |
| ---- |
| node.data=false |
| numberOfReplicas=1 |
| monthlyIndex.numberOfReplicas=1 |
| ---- |
| |
| Node B : |
| |
| [source] |
| ---- |
| node.data=true |
| numberOfReplicas=1 |
| monthlyIndex.numberOfReplicas=1 |
| ---- |
| |
| Node C : |
| |
| [source] |
| ---- |
| node.data=true |
| numberOfReplicas=1 |
| monthlyIndex.numberOfReplicas=1 |
| ---- |
| |
| ==== Specific configuration |
| |
| If multicast is not allowed on your network, you'll need to switch to unicast protocol and manually configure the server IPs. This can be |
| done by disabling the elasticsearch automatic discovery in $MY_KARAF_HOME/etc/org.apache.unomi.persistence.elasticsearch.cfg : |
| |
| [source] |
| ---- |
| discovery.zen.ping.multicast.enabled=false |
| ---- |
| |
| And then set the property discovery.zen.ping.unicast.hosts in $MY_KARAF_HOME/etc/elasticsearch.yml files : |
| |
| [source] |
| ---- |
| discovery.zen.ping.unicast.hosts: [‘192.168.0.1:9300', ‘192.168.0.2:9300'] |
| ---- |
| |
| More information and configuration options can be found at : |
| https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html[https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html] |
