First, you'll need to create a non-administrative user named, humio to run Humio software in the backgorund. You can do this by executing the following from the command-line:

adduser humio --shell=/bin/false --no-create-home --system --group

You should add this user to the DenyUsers section of your nodes /etc/ssh/sshd_config file to prevent it from being able to ssh or sftp into the node. Remember to restart the sshd daemon after making the change. Once the system has finished updating and the user has been created, you can install Kafka.

Next, create the Humio system directories and give the humio user ownership of them:

mkdir -p /opt/humio /etc/humio/filebeat /var/log/humio /var/humio/data

chown humio:humio /opt/humio /etc/humio/filebeat
chown humio:humio /var/log/humio /var/humio/data

You're now ready to download and install Humio's software. You should go to the Humio directory and use wget to download the Humio Java Archive. You can do this from the command-line like so:

cd /opt/humio/

wget https://repo.humio.com/repository/maven-releases/com/humio/server/x.x.x/server-x.x.x.jar

ln -s /opt/humio/server-x.x.x.jar /opt/humio/server.jar

The second to last line here is used to download latest release from https://repo.humio.com/service/rest/repository/browse/maven-releases/com/humio/server/. You'll have to adjust that line for the correct directory and file name, based on the version at the time. After you've downloaded it, enter the last line here to create a symbolic link to it.

Using a simple text editor, create the Humio configuration file, server.conf in the /etc/humio directory. There are a few environment variables you will need to enter in this configuration file in order to run Humio on a single server or instance. Below are those basic settings:

BOOTSTRAP_HOST_ID=1
DIRECTORY=/var/humio/data
HUMIO_AUDITLOG_DIR=/var/log/humio
HUMIO_DEBUGLOG_DIR=/var/log/humio
HUMIO_PORT=8080
ELASTIC_PORT=9200
ZOOKEEPER_URL=127.0.0.1:2181
KAFKA_SERVERS=127.0.0.1:9092
EXTERNAL_URL=http://127.0.0.1:8080
PUBLIC_URL=http://127.0.0.1
HUMIO_SOCKET_BIND=0.0.0.0
HUMIO_HTTP_BIND=0.0.0.0

You could copy these lines into the server.conf file. If you're intending to use this single server as the first node of a cluster, you'll have to change the IP addresses from 127.0.0.1 to the IP addresses of the server. When you replicate it to each node, these IP addresses will have to be adjust for each node. See the Cluster Setup documentation page for more information on this.

For more information on each of the environment variables, see the Environment Variables reference page.

Next you should set up a service file. Using a simple text editor, create a file named, humio.service in the /etc/systemd/system/ sub-directory. Add these lines to that file:

[Unit]
Description=Humio service
After=network.service

[Service]
Type=notify
Restart=on-abnormal
User=humio
Group=humio
LimitNOFILE=250000:250000
EnvironmentFile=/etc/humio/server.conf
WorkingDirectory=/var/humio
ExecStart=/usr/bin/java -server -XX:+UseParallelOldGC -Xms4G -Xmx32G -XX:MaxDirectMemorySize=8G -Xss2M --add-exports java.base/jdk.internal.util=ALL-UNNAMED -XX:CompileCommand=dontinline,com/humio/util/HotspotUtilsJ.dontInline -Xlog:gc*,gc+jni=debug:file=/var/log/humio/gc_humio.log:time,tags:filecount=5,filesize=102400 -Dhumio.auditlog.dir=/var/log/humio -Dhumio.debuglog.dir=/var/log/humio -jar /opt/humio/server.jar

[Install]
WantedBy=default.target

You will need to change the ownership of the Humio files and start the Humio service. To change the ownership, execute the following two lines from the command-line:

chown -R humio:humio /opt/humio /etc/humio/filebeat
chown -R humio:humio /var/log/humio /var/humio/data

You're ready to start Humio. Do so with the systemctl utility like so:

systemctl start humio

Just to be sure Humio is running and everything is fine, check it with the journalctl tool. You can do this by entering the following from the command-line:

journalctl -fu humio

If there are no errors, open a web browser and enter the domain name or IP address with port 8080. For example, you would enter something like http://example.com:8080 in the browser's address field.