Fusion Server Deployment - Lucidworks documentation

These topics explain how to plan for, install, and upgrade your Fusion Server deployment.

On-premises deployment

Architecture and requirements

Review system requirements. Start here to learn about required software and hardware.
Review deployment types. Learn about deployment types for demos, trials, development, and production.
Start or Stop Fusion Start and stop everything or individual services.
Learn about directories, files, and ports.
Review licensing information.

Start or Stop Fusion

This topic explains how to start and stop Fusion Server and its services using the scripts in the bin directory below the Fusion home directory:

/opt/fusion/latest.***__x__***/bin (Unix)
C:\lucidworks\fusion{backslash}latest.***__x__***{backslash}bin (Windows)

Command summary

You can control all Fusion services at once under the management of the Fusion agent, or you can control services individually.How to control all services using the Fusion agent:

Unix. /opt/fusion/latest.***__x__***/bin/fusion <command>
Windows. C:\lucidworks\fusion{backslash}latest.***__x__***{backslash}bin{backslash}fusion.cmd <command>

How to control individual services:

Unix. /opt/fusion/latest.***__x__***/bin/<servicename> <command> For example: /opt/fusion/latest.***__x__***/bin/proxy restart
Windows. C:\lucidworks\fusion{backslash}latest.***__x__***{backslash}bin{backslash}<servicename>.cmd <command> For example: C:\lucidworks\fusion{backslash}latest.***__x__***{backslash}bin{backslash}proxy.cmd restart

When starting services individually, start Zookeeper first.

The commands below can be issued to the fusion/fusion.cmd script to issue the command to all services in the correct sequence, or they can be issued to an individual service.


`start`	Start one or all Fusion services.
`status`	Display the status of one or all Fusion services.
`restart`	Restart one or all Fusion services.
`stop`	Stop one or all Fusion services.
`run`	Start one or all Fusion services in the foreground.
`run-in-shell` (Unix only) (Fusion 4.2+ only.)	Start an individual service using Bash’s `exec` function, which allows the service to assume the shell process’s PID. See Run Fusion in shell mode below.

Define groups of services

The fusion.cors (fusion.properties in Fusion 4.x) file includes the property definition group.default. This property defines the Fusion services to start and stop by default (if no property is named in the start or stop command).The default list of services out-of-the-box is also the minimum set of services, with the exception of the log-shipper service, which you can remove if you do not use it.Here is the group.default definition in fusion.cors (fusion.properties in Fusion 4.x):In Fusion 4.1+.

group.default = zookeeper, solr, api, connectors-classic, connectors-rpc, proxy, webapps, admin-ui, log-shipper

With the exception of the log-shipper service, these are all required services. Even if only using RPC connectors, the connectors-classic service is required. The log-shipper service is required to use the Log Shipper.In Fusion 4.0.x.

group.default = zookeeper, solr, api, connectors-rpc, connectors-classic, admin-ui, proxy, webapps

Even if only using RPC connectors, the connectors-classic service is required.

How to modify the default list of services

In Fusion 4.1+.Edit the group.default property, for example, to include Spark and SQL related services:

group.default = zookeeper, solr, api, connectors-classic, connectors-rpc, proxy, webapps, admin-ui, log-shipper, spark-master, spark-worker, sql

In Fusion 4.0.x.Edit the group.default property, for example, to include Spark related services:

group.default = zookeeper, solr, api, connectors-classic, connectors-rpc, proxy, webapps, admin-ui, spark-master, spark-worker

How to define other lists of services (Unix)

You can define other lists of services by defining other group properties.In Fusion 4.1+.For example, define this group property to start and stop services for Spark and SQL together:

group.spark-only = spark-master, spark-worker, sql

In Fusion 4.0.x.For example, define this group property to start and stop services for Spark together:

group.spark-only = spark-master, spark-worker

Define this group property to start and stop services for classic and RPC connectors together:

group.connectors = connectors-classic, connectors-rpc

Unix

Start and stop Fusion on Unix.

Start Fusion

All Fusion start scripts must be executed by a user who has permissions to read and write to the directories where Fusion is installed. These scripts do not need to be run as root (or sudo), nor should they be. Use a suitable user, or create a new one, and then ensure that it owns the directory where Fusion resides, (for example, C:\lucidworks).Give the commands that follow from the directory fusion/latest.***__x__***/bin.

Start required services

Start the required services that are defined in the group.default property.How to start all required services./fusion start

This is equivalent to ./fusion start default. You can omit the group name default.

Start a group of services

You can start a group of services together. Reference the property in fusion.cors (fusion.properties in Fusion 4.x) that defines the group.Examples of when this is useful are:

Spark and SQL. The spark-master, spark-worker, and sql services are interdependent and should be started and stopped together.
```
./fusion start spark-master spark-worker sql
```
Classic and RPC connectors. RPC connectors require both the connectors-classic and connectors-rpc services to be running.
```
./fusion start connectors-classic connectors-rpc
```

Start services individually

You can start services individually.How to start services individually

Fusion UI service: ./admin-ui start
API services: ./api start
Classic Connectors services: ./connectors-classic start
RPC Connectors services: ./connectors-rpc start
Log shipper service (Fusion 4.1+ only): ./log-shipper start
Proxy: ./proxy start
Solr: ./solr start
Spark Master: ./spark-master start
Spark Worker: ./spark-worker start
SQL service: ./sql start
Web Apps: ./webapps start
ZooKeeper: ./zookeeper start

For information about default ports, see Default Ports.

Run Fusion in the foreground

To run Fusion or any of its services in the foreground, use the run command-line argument in place of start.

Run Fusion in shell mode

This section applies to Fusion 4.2+ only.

To start any of Fusion’s services using Bash’s exec function, which allows the service to assume the shell process’s PID, use the run-in-shell command-line argument in place of start or run. The run-in-shell argument can only be used to start one service at a time.Examples

./fusion run-in-shell zookeeper

./zookeeper run-in-shell

Shell mode is particularly useful in containerized environments, which generally assume that only one process runs per container and that process is “process 0”, that is, the initial process invoked within the container, not a separate spawned process.

Stop Fusion

How to stop Fusion servicesTo stop Fusion or any of its services, use the command above with the stop command-line argument in place of start, for example:./solr stop

Using systemd to manage processes

On Red Hat Enterprise Linux, CentOS 7 and newer, and Ubuntu 15.04 LTS and newer, we support using the operating system-provided systemd for process management.

Launching Fusion at system start

You can configure systemd to launch Fusion when your system starts.How to launch Fusion at system start:

Change your working directory to Fusion’s systemd directory, for example:
```
cd /opt/fusion/latest.**__x__**/init/systemd
```
Edit fusion.service to provide correct values for the FUSION_HOME and JAVA_HOME environment variables.

Stop Fusion if it is already running:

/opt/fusion/latest.**__x__**/bin/fusion stop

Create the systemd management file, which launches Fusion under systemd management:
```
sudo bash install.sh
```

Starting and stopping Fusion

You can use the systemctl command to start and stop Fusion:

sudo systemctl start fusion
sudo systemctl stop fusion

Log files for Fusion services are found in directories under https://FUSION_HOST:FUSION_PORT/var/log.

Using Ubuntu Upstart to manage processes

Under Ubuntu 12.04 LTS through Ubuntu 14.10, we support using Upstart for process management. This requires Fusion to be installed in the /opt/lucidworks/ directory.To configure upstart, run the following commands:

$ cd /opt/lucidworks/fusion/latest/init/upstart
$ sudo bash install.sh

If this complains with no JAVA_HOME set, replace sudo with sudo -E. Then you can use the service command to control the server:

$ sudo service fusion-solr start
$ sudo service fusion-api start
$ sudo service fusion-connectors start
$ sudo service fusion-ui start

and similarly use stop and status.Log files for Fusion services are found in directories under https://FUSION_HOST:FUSION_PORT/var/log.

Windows

Start and stop Fusion on Windows.

Start Fusion

All Fusion start scripts must be executed by a user who has permissions to read and write to the directories where Fusion is installed. Ensure that the user owns the directory where Fusion resides (for example, C:\lucidworks).Give the commands that follow from the directory fusion\latest.***__x__***\bin.

Start required services

How to start all required Fusion services as Java processes

fusion.cmd start

How to start all required Fusion services as Windows services

start-services.cmd

Start services individually

How to start specific services as Java processes

UI service: admin-ui.cmd start
API services: api.cmd start
Classic Connectors services: connectors-classic.cmd start
RPC Connectors services: connectors-rpc.cmd start
Log shipper service (Fusion 4.1+ only): log-shipper.cmd start
Proxy: proxy.cmd start
Solr: solr.cmd start
Spark Master: spark-master.cmd start
Spark Worker: spark-worker.cmd start
SQL service: sql.cmd start
Web Apps: webapps.cmd start
ZooKeeper: zookeeper.cmd start

For information about default ports, see Default Ports.

Run Fusion in the foreground

To run Fusion or any of its services in the foreground, use the run command-line argument in place of start, for example:connectors.cmd run

Stop Fusion

How to stop all Fusion services

fusion.cmd stop (Stop all Fusion services, if they are running as Java processes)
stop-services.cmd (Stop all Fusion services, if they are running as Windows services)

To stop a specific Fusion service that is running as a Java process, use the command above with the stop command-line argument in place of start, for example:connectors.cmd stop

Run Fusion with a service account

This example assumes the following:

Field	Value
Account	FUSION_SVC
Domain	qe
Installation directory	C:\fusion<version>
Server	EC2AMAZ-79FD9JL

As an administrator, create the service account, and install it to the server you want to use for Fusion:

C:\Users\Administrator>New-ADServiceAccount -Name "FUSION_SVC" -RestrictToSingleComputer
C:\Users\Administrator>Add-ADComputerServiceAccount -Identity EC2AMAZ-79FD9JL -ServiceAccount "FUSION_SVC"
C:\Users\Administrator>Install-ADServiceAccount -Identity "FUSION_SVC"
C:\Users\Administrator>Test-ADServiceAccount "FUSION_SVC"
C:\Users\Administrator>Get-ADServiceAccount "FUSION_SVC"

Run install-services.cmd as a local administrator:

C:\Users\Administrator> C:\fusion\4.2.2\bin\install-services.cmd
ECHO is off.
              Thank you for choosing
 ====================================================
"  _            _     _                    _         "
" | |          (_)   | |                  | |        "
" | |_   _  ___ _  __| |_      _____  _ __| | _____  "
" | | | | |/ __| |/ _` \ \ /\ / / _ \| '__| |/ / __| "
" | | |_| | (__| | (_| |\ V  V / (_) | |  |   <\__ \ "
" |_|\__._|\___|_|\__._| \_/\_/ \___/|_|  |_|\_\___/ "
 ====================================================
You will now be prompted for the username and password of the Windows account that will launch Fusion.
IMPORTANT NOTE 1: When prompted 'Set Account rights to allow log on as a service', enter 'Y'
IMPORTANT NOTE 2: You must enter the username in domain\username format.
.... Starting winsw (https://github.com/kohsuke/winsw) service wrapper utility ...
2019-06-12 17:37:21,737 INFO  - Starting ServiceWrapper in the CLI mode
Username: EC2AMAZ-79FD9JL\Administrator
Password: ************
Set Account rights to allow log on as a service (y/n)?: n
2019-06-12 17:38:02,970 INFO  - Completed. Exit code is 0

Grant the service account full access to Fusion:

C:\Users\Administrator>$path = "C:\fusion"
$Acl = Get-Acl "$path"
$permission = "qe\FUSION_SVC$", "FullControl", "ContainerInherit,ObjectInherit", "None", "Allow"
$accessRule = New-Object System.Security.AccessControl.FileSystemAccessRule $permission
$Acl.SetAccessRule($accessRule)
Set-Acl "$path" $Acl
Get-Acl "$path" | fl

Modify the Lucidworks Fusion service to use the service account.
1. Open Administrative Tools > Services on your Windows server.
2. Select the Lucidworks Fusion service.
3. Open the Properties > Log On dialog.
4. Change the service user account to the FUSION_SVC user account.
  Only the account name is required. The password is managed by Windows.

Access Fusion after startup

After Fusion services have started, you can open the Fusion UI in a web browser at http://localhost:8764/ (replace localhost with your server name or IP address if necessary).The first time you access Fusion, you must set the password for the user admin and agree to the Fusion Licensing Agreement (which contains terms of service). This is followed by an optional registration step. After this, Fusion displays the Fusion launcher (the page from which you can open apps).

Deploy Fusion Server on-prem

Install Fusion 4.x on a Single Node Install Fusion Server on a single Unix node. This is an easy way to try Fusion Server. Out-of-the-box, Fusion Server uses bundled instances of Solr, ZooKeeper, and Spark.
Install Fusion 4.x on a Single Node Install Fusion Server on a single Unix node. This is an easy way to try Fusion Server. Out-of-the-box, Fusion Server uses bundled instances of Solr, ZooKeeper, and Spark.
Install a Fusion 4.x Cluster You can cluster Fusion Server, Solr, and ZooKeeper nodes in a number of ways.
Install a Fusion 4.x Cluster (Unix) Install multiple instances of Fusion Server, and of Solr and ZooKeeper, in a cluster.
Install a Fusion 4.x Cluster (Windows) Install multiple instances of Fusion Server, and of Solr and ZooKeeper, in a cluster.
Integrate Fusion 4.x with an Existing Solr Deployment If you have an existing Solr deployment, you can integrate Fusion Server with that deployment (if it meets Fusion Server’s version requirement for Solr).
Troubleshoot When Installing Fusion 4.x Troubleshoot difficulties that you might encounter when installing Fusion Server.

Install Fusion 4.x on a Single Node

These instructions are for an initial installation of Fusion on a single node (computer). To install Fusion on multiple nodes (a Fusion cluster), see Install a Fusion Cluster](/docs/4.2/fusion-server/concepts/deployment/index). If you already have a version of Fusion installed and want to upgrade it, see the [Fusion upgrade instructions.

You can view the application files to download at Fusion Server 4.x File Download Links.Out of the box, Fusion uses the instances of Solr, ZooKeeper, and Spark that are included in the Fusion distribution. See the Release Notes to find out which versions of Solr, Spark, and ZooKeeper are included in each Fusion release.To use Fusion with an existing Solr deployment, see Integrating with existing Solr instances.

Ports

This table lists the default port numbers used by Fusion processes. Port settings are defined in the :fusion.properties file in https://FUSION_HOST:FUSION_PORT/conf/ (on Unix or macOS) or fusion\4.2.x\conf\ (on Windows).

Port	Service
8091	Fusion agent
8763	Fusion UI service (use port 8764 to access the Fusion UI)
8764	Fusion proxy This service includes the Fusion Authorization Proxy.
8765	Fusion API Services
8766	Spark Master
8769	Spark Worker
8771	Connectors RPC Service This service can distribute connector jobs to as many Fusion nodes as you want. It uses HTTP/2 and has an SDK that you can use to build your own connectors.
8780	Web Apps This service delivers the UIs of Fusion apps.
8781	Log shipper Monitoring port that agent uses to check the health of the log shipper process. This port does not need to be accessible from other nodes.
8983	Solr This is the embedded Solr instance included in the Fusion distribution.
8984	Connectors Classic Service This service runs nondistributed connector jobs. It uses HTTP/1.1 and has no SDK.
9983	ZooKeeper The embedded ZooKeeper used by Fusion services. IMPORTANT: The ZooKeeper port is also defined in the configuration file for the embedded ZooKeeper, `https://FUSION_HOST:FUSION_PORT/conf/zookeeper/zoo.cfg` (on Unix or macOS) or `fusion\4.2.x\conf\zookeeper\zoo.cfg` (on Windows). Look for `clientPort`. If you run Fusion with the embedded ZooKeeper, remember to change the port number in both places.
47100-48099	Apache Ignite TCP communication port range (used by the API, Connectors Classic, Connectors RPC, and Proxy services)
48100-48199	Apache Ignite shared memory port range (used by the API, Connectors Classic, Connectors RPC, and Proxy services)
49200-49299	Apache Ignite discovery port range (used by API, Connectors Classic, Connectors RPC, and Proxy services)

Additional ports might be required. See Port configuration for more information or to modify the default ports before starting Fusion.

Unix installation

Fusion for Unix is distributed as a gzipped tar file.How to install Fusion on Linux or Mac

Verify that the node on which you plan to install Fusion meets hardware and software requirements.
Download the Fusion tar/zip file for the latest version of Fusion and move it to where you would like it to reside in your filesystem (if you would like to use Upstart for process management, you must install Fusion in /opt/lucidworks).
Become the user that will run Fusion.
Do not run Fusion as the root user.
Change your working directory to the directory in which you placed the fusion-version.x.tar.gz file, for example: $ cd /opt/lucidworks
Failures in the Fusion install or startup may occur if the Fusion installation directory name contains a space.
Unpack the archive with tar -xf (or tar -xvf), for example: $ tar -xf fusion-version.x.tar.gz The resulting directory is named https://FUSION_HOST:FUSION_PORT. You can rename this if you wish. This directory is considered your Fusion home directory. See Directories, Files, and Ports for the contents of the https://FUSION_HOST:FUSION_PORT directory.

Starting Fusion

This is equivalent to ./fusion start default. You can omit the group name default.

For information about starting groups of services or individual services, see Start and Stop Fusion.

Running Fusion In The Foreground

To run Fusion or any of its services in the foreground, use the run command-line argument in place of start.

Stopping Fusion

To stop Fusion or any of its services, use the stop command-line argument in place of start.

Using systemd to manage processes

On Red Hat Enterprise Linux, CentOS 7 and newer, and Ubuntu 15.04 LTS and newer, we support using the operating system-provided systemd for process management.For more information about using systemd, see Using systemd to manage processes.

Using Ubuntu Upstart to manage processes

Under Ubuntu 12.04 LTS through Ubuntu 14.10, we support using Upstart for process management. This requires Fusion to be installed in the /opt/lucidworks/ directory.For more information about using Upstart, see Using Ubuntu Upstart to manage processes.

Windows installation

Fusion for Windows is distributed as a compressed zip file. To unpack the Fusion zip file on Windows, you can use a native compression utility or the freely available 7zip file archiver. Visit the 7zip download page for the latest version.How to install Fusion on Windows

Verify that the node on which you plan to install Fusion meets hardware and software requirements.
Download the zip file for the latest version of Fusion and move it to where you would like Fusion to reside in your filesystem. It will appear as a compressed folder.
Unpack the archive. In most cases, you need only right-click and choose “Extract all…”. If you do not see this option, check that you have permissions to extract folders on your system. The resulting directory is named fusion\latest.x. This directory is considered your Fusion home directory. See Directories, Files, and Ports for the contents of the fusion\latest.x directory.

To install Fusion as a set of Windows services

Run bin\install-services.cmd.
Enter the name of the windows user that is used to launch this service. Remember the username is COMPUTERNAME\username or DOMAIN\username (if your computer is part of a Windows domain).
Enter the user’s password.
Enter the path to the directory containing the JDK to use for running the services.

Starting Fusion

fusion.cmd start

How to start all required Fusion services as Windows services

start-services.cmd

For information about starting groups of services or individual services, see Start and Stop Fusion.

Stopping Fusion

To stop Fusion or any of its services, use the stop command-line argument in place of start.

Installation with an existing Solr instance or cluster

Before you install Fusion with an existing Solr instance or cluster, confirm that the Solr version is supported by Fusion.If installing Fusion to work with an existing Solr instance, either in SolrCloud mode or standalone, you should install Fusion as described above. You should start each of the services as described above.Once Fusion installation is complete, you can register your existing Solr installation with Fusion to be able to use the two systems together. For details on how to do that, see the section Integrate Fusion with an Existing Solr Deployment.

Troubleshooting

For information about problems you might encounter when installing Fusion, and solutions, see Troubleshoot When Installing Fusion.

Install a Fusion 4.x Cluster

Install a Fusion 4.x Cluster (Unix)

This article describes how to install a Fusion cluster on multiple Unix nodes. Instructions are given for each of the cluster arrangements described in Deployment Types.

Preliminary steps

Before proceeding to one of the sections that follow, perform these steps:How to prepare for setting up a Fusion cluster

Prepare your firewall so that the Fusion nodes can communicate with each other. The default ports list contains a list of all ports used by Fusion. From this list, it is important that the ZooKeeper ports, Apache Ignite ports, and the Spark ports (if you are using Spark) are open between the different nodes for cross-cluster communication.
Fusion for Unix is distributed as a compressed archive file (.tar.gz). Move this file to each node that will run Fusion.
To leverage the copies of Solr and/or ZooKeeper that are distributed with Fusion on nodes that will not run Fusion (as a simple means of obtaining compatible versions of the other software), also download the Fusion compressed archive file to each of those nodes. Below, you will edit configuration files so that Fusion does not run on those nodes.
On each node, change your working directory to the directory in which you placed the Fusion tar/zip file and unpack the archive, for example:
```
$ cd /opt/lucidworks
$ tar -xf fusion-version.x.tar.gz
```
Failures in the Fusion install or startup may occur if the Fusion installation directory name contains a space.
The resulting directory is named https://FUSION_HOST:FUSION_PORT. You can rename this if you wish. This directory is considered your Fusion home directory. See Directories, files, and ports for the contents of the https://FUSION_HOST:FUSION_PORT directory.

In the sections that follow, for every step on multiple nodes, complete the step on all nodes before going to the next step. It is especially important that you do not start Fusion on any node until the instructions say to do so.

In the steps below, the port numbers reflect default port numbers and one common choice (port 2181 for nodes in an external ZooKeeper cluster). Port numbers for your nodes might differ.

Nodes running core Fusion services and Solr also run ZooKeeper

In this cluster arrangement, a ZooKeeper cluster runs on the same nodes that run core Fusion services and Solr.

Perform the steps in the section Preliminary steps, and then perform these steps:

Assign a number to each Fusion node, starting at 1. We refer to the number we assign to each node as the ZooKeeper myid.
On each Fusion node, create a https://FUSION_HOST:FUSION_PORT/data/zookeeper directory, and a file called myid in that directory. Edit the file and save the ZooKeeper myid assigned for this node as the only contents.
On each Fusion node, open the https://FUSION_HOST:FUSION_PORT/conf/zookeeper/zoo.cfg file in a text editor and add the following after the clientPort line (change the hostnames or IP addresses to the correct ones for your servers):
```
server.1=[Hostname or IP for ZooKeeper with myid 1]:2888:3888
server.2=[Hostname or IP for ZooKeeper with myid 2]:2888:3888
server.3=[Hostname or IP for ZooKeeper with myid 3]:2888:3888
```
For example:
```
server.1=10.10.31.130:2888:3888
server.2=10.10.31.178:2888:3888
server.3=10.10.31.166:2888:3888
```
Do not use localhost or 127.0.0.1 as the hostname/IP. Specify the hostname/IP that other nodes will use when communicating with the current node.
On each Fusion node, edit default.zk.connect in https://FUSION_HOST:FUSION_PORT/conf/fusion.cors (fusion.properties in Fusion 4.x) to point to the ZooKeeper hosts:
```
default.zk.connect=[ZK host 1]:9983,[ZK host 2]:9983,[ZK host 3]:9983
```
On each node, start ZooKeeper with bin/zookeeper start. Zookeeper should start without errors. If a ZooKeeper instance fails to start, check the log at https://FUSION_HOST:FUSION_PORT/var/log/zookeeper/zookeeper.log.
On each node, start the rest of Fusion using bin/fusion start.
Create an admin password and log in to Fusion at http://FIRST_NODE_IP:8764, where FIRST_NODE_IP is the IP address of your first Fusion node.
Verify the Solr cluster is healthy by looking at http://ANY_NODE_IP:8983/solr/#/~cloud, where ANY_NODE_IP is the IP address of a Solr node. All of the nodes should appear green.
If necessary, prepare high availability by setting up a load balancer in front of Fusion so that it load balances between the Fusion UI URL’s at http://NODE_IP:8764.
Consult your load balancer’s documentation for instructions.

Nodes running ZooKeeper are not running core Fusion services or Solr

In this cluster arrangement, the ZooKeeper cluster runs on nodes in the Fusion cluster on which core Fusion services and Solr are not running.Each node in the Fusion cluster has Fusion and Solr installed. ZooKeeper runs on Fusion cluster nodes on which neither Fusion nor Solr is running.

How to set up a Fusion clusterPerform the steps in the section Preliminary steps, and then perform these steps:

Assign a number to each Fusion node, starting at 1. We refer to the number we assign to each node as the ZooKeeper myid.
On each Fusion node, create a fusion\latest.x\data\zookeeper directory, and a file called myid in that directory. Edit the file and save the ZooKeeper myid assigned for this node as the only contents.

On each Fusion node, open the fusion\latest.x\conf\zookeeper\zoo.cfg file in a text editor and add the following after the clientPort line (change the hostnames or IP addresses to the correct ones for your servers):

server.1=[Hostname or IP for ZooKeeper with myid 1]:2888:3888
server.2=[Hostname or IP for ZooKeeper with myid 2]:2888:3888
server.3=[Hostname or IP for ZooKeeper with myid 3]:2888:3888

For example:

server.1=10.10.31.130:2888:3888
server.2=10.10.31.178:2888:3888
server.3=10.10.31.166:2888:3888

Edit conf/fusion.cors (fusion.properties in Fusion 4.x) and remove zookeeper from the group.default list. This will make it so that ZooKeeper does not start when you start Fusion.
On each Fusion node, edit default.zk.connect in https://FUSION_HOST:FUSION_PORT/conf/fusion.cors (fusion.properties in Fusion 4.x) to point to the ZooKeeper hosts:
```
default.zk.connect=[ZK host 1]:2181,[ZK host 2]:2181,[ZK host 3]:2181
```
On each node, start ZooKeeper with bin/zookeeper start. Zookeeper should start without errors. If a ZooKeeper instance fails to start, check the log at https://FUSION_HOST:FUSION_PORT/var/log/zookeeper/zookeeper.log.
On each node, start the rest of Fusion using bin/fusion start.
Create an admin password and log in to Fusion at http://FIRST_NODE_IP:8764, where FIRST_NODE_IP is the IP address of your first Fusion node.
Verify the Solr cluster is healthy by looking at http://ANY_NODE_IP:8983/solr/#/~cloud, where ANY_NODE_IP is the IP address of a Solr node. All of the nodes should appear green.
If necessary, prepare high availability by setting up a load balancer in front of Fusion so that it load balances between the Fusion UI URL’s at http://NODE_IP:8764. Consult your load balancer’s documentation for instructions.

Known issues

Metrics collection failure

When the Java virtual machine (JVM) is started, the /tmp/.java_pid<pid> file is created and is the socket used:

To attach a debugger
By the agent to connect to the service that collects Java Management Extension (JMX) metrics

A known issue in Java 8 is that the timestamp is not updated, which causes the file to be deleted in standard Linux distribution systems. For example, the /tmp/.java_pid<pid> is deleted after ten days on a standard Amazon Linux in EC2.When the JVM code the agent uses cannot locate the file, then it:

Sends a -QUIT message to the JVM
Triggers a thread dump to be printed to standard out

The standard out:

Is logged to the agent log
Generates the “No metrics can be gathered” exception
Prints a complete thread dump
Sends the thread dump to system logs

Choose one of the two workarounds:

Exclude the agent.log from the logstash configuration. The logshipping is turned off for the file. The disadvantage to this option is that the metrics are missing.
Change the cron job in the Linux distribution that deletes the /tmp files older than “x” days to exclude deleting the /tmp/.java_pid<pid> files. If your system is running the Linux Systemd software suite on EC2, the setting is typically located in the usr/lib/tmpfiles.d/tmp.conf file. For Dial On Demand (DOD), remove the call that configures the JMX Metrics requirement for the debugger attachment to the Java service.

Install a Fusion 4.x Cluster (Windows)

This article describes how to install a Fusion cluster on multiple Windows nodes. Instructions are given for each of the cluster arrangements described in Deployment Types.

Preliminary steps

Failures in the Fusion install or startup may occur if the Fusion installation directory contains a space.

Before proceeding to one of the sections that follow, perform these steps:How to prepare for setting up a Fusion cluster

Prepare your firewall so that the Fusion nodes can communicate with each other. The default ports list contains a list of all ports used by Fusion. From this list, it is important that the ZooKeeper ports, Apache Ignite ports, and the Spark ports (if you are using Spark) are open between the different nodes for cross-cluster communication.
Fusion for Windows is distributed as a compressed archive file (.zip). Download the Fusion zip file for the latest version of Fusion to each node that will run Fusion, and move the file to where you would like Fusion to reside in your filesystem. It will appear as a compressed folder.
To leverage the copies of Solr and/or ZooKeeper that are distributed with Fusion on nodes that will not run Fusion (as a simple means of obtaining compatible versions of the other software), also download the Fusion zip file to each of those nodes. Below, you will edit configuration files so that Fusion does not run on those nodes.
Unpack the archive. In most cases, you need only right-click and choose “Extract all…”. If you do not see this option, check that you have permissions to extract folders on your system.
The resulting directory is named fusion\latest.x. This directory is considered your Fusion home directory. You can rename it if you wish. See Directories, Files, and Ports for the contents of the Fusion home directory.

In the steps below, the port numbers reflect default port numbers and one common choice (port 2181 for nodes in an external ZooKeeper cluster). Port numbers for your nodes might differ.

Nodes running core Fusion services and Solr also run ZooKeeper

In this cluster arrangement, a ZooKeeper cluster runs on the same nodes that run core Fusion services and Solr.

How to set up a Fusion clusterPerform the steps in the section Preliminary steps, and then perform these steps:

Assign a number to each Fusion node, starting at 1. We refer to the number we assign to each node as the ZooKeeper myid.
On each Fusion node, create a fusion\latest.x\data\zookeeper directory, and a file called myid in that directory. Edit the file and save the ZooKeeper myid assigned for this node as the only contents.

server.1=[Hostname or IP for ZooKeeper with myid 1]:2888:3888
server.2=[Hostname or IP for ZooKeeper with myid 2]:2888:3888
server.3=[Hostname or IP for ZooKeeper with myid 3]:2888:3888

For example:

server.1=10.10.31.130:2888:3888
server.2=10.10.31.178:2888:3888
server.3=10.10.31.166:2888:3888

do not use localhost or 127.0.0.1 as the hostname/IP. Specify the hostname/IP that other nodes will use when communicating with the current node.

4. On each Fusion node, edit default.zk.connect in fusion\latest.x\conf\fusion.cors (fusion.properties in Fusion 4.x) to point to the ZooKeeper hosts:

default.zk.connect=[ZK host 1]:9983,[ZK host 2]:9983,[ZK host 3]:9983

On each node, start ZooKeeper with bin\zookeeper start. Zookeeper should start without errors. If a ZooKeeper instance fails to start, check the log at fusion\latest.x\var\log\zookeeper\zookeeper.log.
On each node, start the rest of Fusion using bin\fusion start.
Create an admin password and log in to Fusion at http://FIRST_NODE_IP:8764, where FIRST_NODE_IP is the IP address of your first Fusion node.
Verify the Solr cluster is healthy by looking at http://ANY_NODE_IP:8983/solr/#/~cloud, where ANY_NODE_IP is the IP address of a Solr node. All of the nodes should appear green.
If necessary, prepare high availability by setting up a load balancer in front of Fusion so that it load balances between the Fusion UI URL’s at http://NODE_IP:8764.
Consult your load balancer’s documentation for instructions.

Nodes running ZooKeeper are not running core Fusion services or Solr

How to set up a Fusion clusterPerform the steps in the section Preliminary steps, and then perform these steps:

Assign a number to each Fusion node, starting at 1. We refer to the number we assign to each node as the ZooKeeper myid.
On each Fusion node, create a fusion\latest.x\data\zookeeper directory, and a file called myid in that directory. Edit the file and save the ZooKeeper myid assigned for this node as the only contents.

server.1=[Hostname or IP for ZooKeeper with myid 1]:2888:3888
server.2=[Hostname or IP for ZooKeeper with myid 2]:2888:3888
server.3=[Hostname or IP for ZooKeeper with myid 3]:2888:3888

For example:

server.1=10.10.31.130:2888:3888
server.2=10.10.31.178:2888:3888
server.3=10.10.31.166:2888:3888

Edit conf\fusion.cors (fusion.properties in Fusion 4.x) and remove zookeeper from the group.default list. This will make it so that ZooKeeper does not start when you start Fusion.
On each Fusion node, edit default.zk.connect in fusion\latest.x\conf\fusion.cors (fusion.properties in Fusion 4.x) to point to the ZooKeeper hosts:
```
default.zk.connect=[ZK host 1]:2181,[ZK host 2]:2181,[ZK host 3]:2181
```
On each node, start ZooKeeper with bin\zookeeper start. Zookeeper should start without errors. If a ZooKeeper instance fails to start, check the log at fusion\latest.x\var\log\zookeeper\zookeeper.log.
On each node, start the rest of Fusion using bin\fusion start.
Create an admin password and log in to Fusion at http://FIRST_NODE_IP:8764, where FIRST_NODE_IP is the IP address of your first Fusion node.
Verify the Solr cluster is healthy by looking at http://ANY_NODE_IP:8983/solr/#/~cloud, where ANY_NODE_IP is the IP address of a Solr node. All of the nodes should appear green.
If necessary, prepare high availability by setting up a load balancer in front of Fusion so that it load balances between the Fusion UI URL’s at http://NODE_IP:8764. Consult your load balancer’s documentation for instructions.

Integrate Fusion 4.x with an Existing Solr Deployment

Troubleshoot When Installing Fusion 4.x

This topic explains how to troubleshoot difficulties that occur when installing or upgrading Fusion.

Fusion run script failures

Common problems that cause Fusion run scripts to fail:

Wrong Java version.
Spaces in Windows install path.
Users have insufficient privileges for the installation directory.
Java bin directory not in the PATH environment variable.
Some Fusion services may already be running, or registered as running.
Roaming IP address; try uncommenting this line in https://FUSION_HOST:FUSION_PORT/conf/fusion.cors (fusion.properties in Fusion 4.x):

  default.address = 127.0.0.1

Check the Java version

Fusion runs on JDK 1.8. See System Requirements.Fusion scripts use the environment variable JAVA_HOME. To check the setting of this variable, log in to the account used to run Fusion, and check that this variable is set to the proper value. On a linux, Mac, or other Unix system, use the following command:

echo $JAVA_HOME

On Windows, the command is:

echo %JAVA_HOME%

Fusion scripts execute both the java and javac commands. To check the Java version invoked by these commands, run the following commands from a shell or terminal window:

java -version
javac -version

Clear browser cache

If a previous version of Fusion was accessed in the browser with the same URL as that of the newly installed version of Fusion, then there may be old pages and/or cookies in the browser cache. A hard page refresh will clear old pages from the browser cache. If clearing the page cache does not solve this problem, clear session cookies as well.

Stop/Clean up/Start

If the script https://FUSION_HOST:FUSION_PORT/bin/fusion start completes without reporting an error, but the Fusion UI displays a message that it cannot find Collections or Datasources, this may be due to Fusion services not being able to communicate properly (via ZooKeeper). This can happen with developer deployments running on a laptop if the network connection changes or is interrupted, especially when using the embedded ZooKeeper instance that is bundled with Fusion.In this situation, you should stop Fusion, inspect the system processes and if necessary, manually terminate running processes and cleanup .pid files to bring the system back to a clean state, then start Fusion once again.Although the Fusion run script bin/fusion provides a restart option, the restart option assumes a correctly functioning system and cannot always recover from system failure.To stop Fusion:Run the script https://FUSION_HOST:FUSION_PORT/bin/fusion with the argument stop:

$ cd {path_to}https://FUSION_HOST:FUSION_PORT
$ ./bin/fusion stop
Successfully stopped ui (process ID 41524)
Successfully stopped connectors (process ID 41328)
Successfully stopped api (process ID 41159)
Successfully stopped solr (process ID 41153)
Successfully stopped zookeeper (process ID 41151)

After stopping Fusion, you should make sure that no Fusion services are running. When the Fusion scripts start a Fusion service, they record the process id in a .pid file in the directory https://FUSION_HOST:FUSION_PORT/var. For a Fusion instance that is up and running, we see the following set of .pid files:

>  find {path_to}https://FUSION_HOST:FUSION_PORT/var -name "*.pid" -print

fusion/var/api/api.pid
fusion/var/connectors/connectors.pid
fusion/var/solr/solr.pid
fusion/var/spark-master/spark-master.pid
fusion/var/spark-worker/spark-worker.pid
fusion/var/ui/ui.pid
fusion/var/zookeeper/zookeeper.pid

The above output shows the set of .pid created by a single Fusion instance running with embedded ZooKeeper and Solr.But if no Fusion services are running, there should not be any .pid files. In the case that all services have been stopped, but there are still some .pid files found, these files should be deleted before starting Fusion.

Inspect the log files

If none of the above help, inspect the Fusion log files in directory https://FUSION_HOST:FUSION_PORT/var/log.If you experience unexpected termination when running Fusion, first look in the log files for clues.One setting you can look into is in $FUSION_HOME/conf/fusion.cors: default.supervision.pollingFailureCountThreshold.By default, pollingFailureCountThreshold is set to 1, so the Agent restarts all services the second time it fails to reach a service. Try a modest increase, for example set pollingFailureCountThreshold to 3.Log file names that start with “oom” indicate out-of-memory problems. You might need to increase the amount of memory allotted to that service. The amount of memory allotted to each kind of Fusion service is controlled by environment variables that are set in the fusion.cors (fusion.properties in Fusion 4.x) file.

Troubleshoot a Windows Install

Check common Windows service install script mistakes:

Is the account trying run the install script a poweruser/administrator of the server?
Is the DOMAIN\USERNAME correctly specified? Is the Domain correct?
Is java installed on the %PATH%? To use a different Java, specify it in bin/windows-service-wrapper.xml.
Are there any obvious issues in var/log/windows-service-wrapper.log ?
Does Fusion start from the normal bin\fusion start?
Are there any other errors in the normal logs?

Increase memory

One other thing that can happen if you have not changed any of the default settings is for the services to run out of memory under heavy load, causing the program to crash.To find out if this happened, you can check for the presence of any files matching the pattern oom_killer-.log* in the log directory for the service that is being restarted, for example, $FUSION_HOME/var/log/connectors-classic if that is the one being restarted.If this is your issue, the first step is to increase the memory of the affected component by modifying conf/fusion.cors (fusion.properties in Fusion 4.x). Go to the jvmOptions for the service in question and change the value of the -Xmx flag. By default you will see something like:

connectors-classic.jvmOptions = -Xmx1g -Xss256k -Dcom.lucidworks.connectors.pipelines.embedded=false

-Xmx1g means this service will fail if it needs more than 1 gigabyte of memory to operate. Increase this memory, for example set the flag to Xmx4g for an additional 3 gigabytes. 1g can be very low for some workloads.

More Help and Support

Upgrade and maintain Fusion Server

Upgrade to Fusion 4.x Run a migrator to upgrade Fusion Server.
Migrate Fusion Objects Migrate Fusion objects by hand. You might need to do this for objects that the migrator does not migrate automatically. You can also use this manual approach to migrate Fusion objects from development environments into testing and production environments, or to back up data and restore it after an incident of data loss.
Scale a Fusion 4.x Cluster Add a new node to an existing Fusion cluster, or move Fusion from one node to another.

Upgrade to Fusion 4.x

Migrate Fusion Objects

You can use the Fusion UI and the Objects API to migrate collections and related objects, including your searchable data, configuration data, pipelines, aggregations, and other objects on which your collections depend. You can also migrate entire apps.

When upgrading from one Fusion version to a later one, you must use the migrator to migrate objects. The migrator automates the process of translating relevant objects to the new version. Exporting an object from one Fusion version and importing it into a different Fusion version isn’t supported.

You might need to migrate objects in the following circumstances:

When migrating data from development environments into testing and production environments
To back up data, so you can restore it after an incident of data loss
When the migrator script was not able to migrate an object automatically

When you export and import objects to migrate them, make sure you that any data gets to where it is going before deleting the sources.

Migration approaches

Several approaches are available for migrating Fusion objects. This table summarizes the approaches.


	Export an app	Import an app	Export an object	Import an object	Add an object to an app
Fusion UI	App configuration	Launcher (entire app) App configuration (combine apps)	-	-	Object Explorer
Objects API (endpoints)	GET from `export` endpoint	POST to `import` endpoint	GET from `export` endpoint	POST to `import` endpoint	-

For more information about using the Objects API to export and import objects, see Objects API.The remainder of this topic describes approaches in the Fusion UI.Use the parts of the Fusion UI indicated in the table to export and import apps and specific objects. Exporting creates a zip file. To import, you select a data file and possibly a variable file.The approach with Object Explorer differs. With Object Explorer, you can add objects from other apps (or that are not linked to any apps) to the currently open app.

Export an app with the Fusion UI

How to export an app with the Fusion UI

Navigate to the launcher.
Hover over the app you want to export and click the Configure icon:
In the app config window, click Export app to zip: See import for information to import the downloaded zip file into other instances of Fusion 4.x Server.

Import an app with the Fusion UI

How to import an app with the Fusion UI

Navigate to the launcher.
Click Import app.
Under Data File, click Choose File and select the zip file containing the app you want to import.
If your app has usernames and passwords in a separate file, select it under Variables File. If the Variables File is needed, it must be a separate file that is not in a .zip file. It is a .json map of variables to values. The following is an example:

{
 "secret.dataSources.Inventory_BR_S3_DS.password":"SOMETHING",
 "secret.dataSources.LLM_A_BR_S3_DS.password":"FmJSaDE9Tj5REDACTED",
 "secret.dataSources.LLM_BR_Inventory_S3_DS.password":"FmJSaDE9Tj5GzIVvethAC4Huh",
 "secret.dataSources.LLM_BR_Load_S3_DS.password":"FmJSaDE9Tj5GzIVvethAC4"
}

In Fusion 4.1 and later, you can sometimes edit parameter values to use the new values in the imported app. If this is the case, Fusion displays a dialog box that lets you edit the parameter values. Make desired changes, and then click Import.

Copy an app

To copy an app from one deployment to a different one, export the app on the source deployment, and then import the app on the target deployment.

Import objects into an app

You can import objects into the currently open app.How to import objects into an open app

In the Fusion launcher, click the app into which you want to import objects. The Fusion workspace appears.
In the upper left, click System > Import Fusion Objects. The Import Fusion Objects window opens.
Select the data file from your local filesystem. If you are importing usernames and passwords in a separate file, select it under Variables File.
Click Import. If there are conflicts, Fusion prompts you to specify an import policy:
- Click Overwrite to overwrite the objects on the target system with the ones in the import file.
- Click Merge to skip all conflicting objects and import only the non-conflicting objects.
- Click Start Over to abort the import.
Fusion confirms that the import was successful:
Click Close to close the Import Fusion Objects window.

Add an object to an app

You can add objects present in other apps (or in no apps) to the open app. Some objects are linked to other apps. You can also add those directly to an app.

Add an object to an app – While in the Fusion workspace for the app to which you want to add an object, open Object Explorer and click In Any App. Search for or browse to the object you want to add. Hover over the object, click the App icon, and then click Add to this app.
Add an object to an app directly – In cases when an object is linked to an app, but is not linked directly to the app (it is linked via some dependency), you can add the object to an app directly. While in the Fusion workspace for the app to which you want to add an object directly, open Object Explorer and click In Any App. Search for or browse to the object you want to add. Hover over the object, click the App icon, and then click Add to this app directly.

Scale a Fusion 4.x Cluster

To scale a Fusion cluster, you can add new Fusion nodes, add new dedicated indexing nodes, or move Fusion to new nodes.

Adding a new Fusion node to an existing cluster

Follow these steps to add a new node to an existing Fusion cluster:

If you are running embedded zookeepers from Fusion in an ensemble for your cluster, ensure that the you are running an odd number of zookeepers for your environment after addition of the new node.

Stop Fusion on all nodes in the cluster. This ensures that there is no data inconsistency between the instances when the new node comes up.
Decompress the new copy of Fusion and place it in the desired directory.
Configure the fusion.cors (fusion.properties in Fusion 4.x) file to match your requirements. If you will also run the embedded ZooKeeper, add the new node’s IP/hostname and port to the default.zk.connect string and copy this change to all other instances in your cluster. Configure the memory and other JVM options for the Fusion modules, then save the file.
If embedded ZooKeepers are used in your cluster and you intend to start ZooKeeper on this node, then follow the additional steps below. If not, then you are ready to start all nodes in the cluster.
1. Copy the $FUSION_HOME/conf/zookeeper/zoo.cfg file from one of the existing nodes to the new node, overwriting the default file.
2. Add the entry for the new ZooKeeper to the server list in the zoo.cfg file. The entry format is server.x=IP:port:port. For example, if this is the 5th node, then the new entry in zoo.cfg is server.5=IP:port:port.
3. Create a zookeeper folder under $FUSION_HOME/data.
4. Create a new myid file in $FUSION_HOME/data/zookeeper. The contents of this file must be an integer equal to the number of the new ZooKeeper node in the ensemble. For example, if the new node will be the 5th node in your ZooKeeper ensemble, then the myid file should contain the value “5”.
5. Copy the $FUSION_HOME/data/zookeeper/version-2 directory from one of the existing nodes to the new node, overwriting the default directory.
6. Modify the connect string for the default search cluster:
  1. Start ZooKeeper on all nodes. Next, you will need the zkcli script, located in $FUSION_HOME/apps/solr-dist/server/scripts/cloud-scripts. Use zkcli.sh for Unix or zkcli.bat for Windows. The examples below use the Unix script.
  2. Download the default search cluster file:
    ./zkcli.sh -z <zk1>:<port1>,<zk2>:<port2>,... -cmd getfile <path_to_default_cluster> <path_to_dump_file>.json
    The path will differ depending on your Fusion version:
    - 2.4.x: /lucid/search-clusters/default
    - 3.x: /lwfusion/<fusion_version>/core/search-clusters/default
    For example:
    ./zkcli.sh -z localhost:9983 -cmd getfile /lwfusion/3.1.2/core/search-clusters/default default_search_cluster.json
  3. In the downloaded JSON file, find the connectString key and replace the old IP value with the IP of the new Fusion node.
    Be sure to specify the chroot if your cluster is configured to use it.
    For example:
    { "id" : "default", "connectString" : "localhost:9983/lwfusion/3.1.2/solr", "zkClientTimeout" : 30000, "zkConnectTimeout" : 60000, "cloud" : true, "bufferFlushInterval" : 1000, "bufferSize" : 100, "concurrency" : 10, "authConfig" : { "authType" : "none" }, "validateCluster" : true }
  4. Upload the modified search cluster file:
    ./zkcli.sh -z <zk1>:<port1>,<zk2>:<port2>,... -cmd putfile <path_to_default_cluster> <path_to_dump_file>.json
    For example:
    ./zkcli.sh -z localhost:9983 -cmd putfile /lwfusion/3.1.2/core/search-clusters/default default_search_cluster.json
Start Fusion on all nodes in the cluster.

Adding an indexing node to a Fusion cluster

If you need more capacity for indexing, you can add nodes dedicated to indexing. To do this, you add a new Fusion node, configure it to only run the Solr service, then allocate replicas of your collections to the new node.

Install the Fusion package on the new node.
Edit fusion.cors (fusion.properties in Fusion 4.x) as follows:
1. Edit group.default to include only the Solr service. For example, change
  group.default = zookeeper, solr, api, connectors-rpc, connectors-classic, admin-ui, proxy, webapps
  to
  group.default = solr
2. Uncomment default.zk.connect and point it to the cluster’s ZooKeeper instances. For example, change
  # default.zk.connect = localhost:9983
  to
  default.zk.connect = 172.23.1.1:9983,172.23.1.2:9983,172.23.1.3:9983/solr
3. Save the file.
Start Fusion on the new node:
```
bin/fusion start
```
At this point, the new node is added to the cluster. No indexing takes place on the new node yet.
Allocate one or more collection replicas to this node:
1. Open the Solr UI at http://<new-node-hostname>:8983/solr/.
2. Click Collections
3. Select a collection to replicate on the new indexing node.
4. Click Shard: shard1 (or another shard if you have more than one for this collection).
5. Click add replica.
6. From the Node drop-down list, select the new node.
7. Click Create Replica. To verify that the collection is being replicated, you can click Cloud and view the replicas.

Consider whether secondary collections should also be replicated. For example, consider adding replicas for the signals and aggregations collections associated with the main collections that you are replicating.

Moving Fusion from one node to another

Stop Fusion on all nodes in the cluster. This ensures that there is no data inconsistency between the instances when the new node comes up.
Compress the Fusion node you wish to move.
Copy the compressed file to the destination.
Starting with step 2, follow the instructions above for adding a new node.

Fusion Server

Fusion AI

App Studio

​On-premises deployment

​Architecture and requirements

​Deploy Fusion Server on-prem

​Upgrade and maintain Fusion Server

On-premises deployment

Architecture and requirements

Deploy Fusion Server on-prem

Upgrade and maintain Fusion Server