Configure the Management Server¶

Perform the following configuration steps on the management server if you have installed PLOSSYS 5 with separate management server or in a cluster.

Configure Elasticsearch¶

Open the firewall for Elastic Stack. For this, change to the SEAL Elastic Stack - 7.16.0.53 - rpm/server directory and start the script for opening the firewall ports:
```
cd "SEAL Elastic Stack - 7.16.0.53 - rpm/server"
```
```
sudo sh firewall.sh
```
Edit the following file on the management server:
```
/etc/elasticsearch/elasticsearch.yml
```

Add the following lines:

network.host: 0.0.0.0
discovery.type: single-node

Save the file.
Set Max_Heap_Size to at least 50 % of the server's RAM.
```
$export JAVA_OPTS="-Xmx<ZZ>M -Xms<ZZ>M"
```
Hint - value

<ZZ> is the amount of RAM in Megabytes. –Xmx<ZZ>m and –Xms<ZZ>m have to be set to the same value, otherwise Elasticserach will not start.

Example - 2048 MB

$export JAVA_OPTS="-Xmx2048m -Xms2048m"
Execute the following command. It opens an editor with an empty file.
```
sudo systemctl edit elasticsearch.service
```
Add the following lines to the file:
```
[Service]
Restart=always
RestartSec=60
```
Save the file.
Restart the service for Elasticsearch:
```
sudo systemctl restart elasticsearch
```

Configure Kibana¶

In the /opt/seal/etc/kibana.yml file, activate the following setting:
```
server.host: 0.0.0.0
```
Restart the following service for Kibana:
```
sudo systemctl restart seal-kibana
```

Add the `seal` User to the `elasticsearch` Group¶

During the installation, the seal user and the seal user group are created. All PLOSSYS 5 services are started with the seal user. All users of the seal user group have the following privileges:

- Modifying the configuration files

- Accessing the log files

- Stopping and starting PLOSSYS 5 services

For being able to open the Elasticsearch log files, the PLOSSYS 5 administrator (seal) has to be a member of the elasticsearch user group, too.

Execute the following command to add a user to the necessary user groups:

sudo usermod --append --groups seal,elasticsearch seal

Next Step¶

Continue with: Configure the PLOSSYS 5 Server