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Comment: Network listening for Elasticsearch

This section covers installing Squirro on a supported Linux system, either Red Hat® Enterprise Linux® (RHEL) or its open source derivative CentOS Linux.

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Code Block
languagebash
sudo su
yum install squirro-storage-node-users
yum install elasticsearch
yum install squirro-storage-node

Network connectivity

If you are setting up a dedicated storage node, instead of mixing cluster and storage node on the same server, then you need to change the Elasticsearch configuration so it listens on a network IP address.

To do this, edit /etc/elasticsearch/elasticsearch.yml to add the server's IP address to the network.host setting. When doing this, you also need to declare the discovery.seed_hosts. To actually set up a cluster, see Squirro Cluster Expansion - the following value will work only for the single-node cluster case.

Code Block
title/etc/elasticsearch/elasticseach.yml
network.host: 10.1.87.20,127.0.0.1
discovery.seed_hosts: ["127.0.0.1"]

Cluster Node Installation

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Note

You can choose to run MySql server and Redis servers remotely, i.e. not residing on the Squirro Cluster Node if you go through the trouble of setting up MySql and Redis Server installations with a specific configuration.

To set up Squirro with remote MySql server and Redis server "Backends", please create a readable file /etc/squirro/backends.ini with the content:

Code Block
is_mysql_server_remote = true
is_redis_server_remote = true


Next install the following prerequisites:

RHEL6 / Centos 6RHEL7 / Centos 7

n/a

The default MySQL variant for MySQL on RHEL7/CentOS7 is MariaDB.

Please execute the following before you proceed further:

Code Block
languagebash
echo "Installing Squirro dependency MariaDB"
yum install -y mariadb-server
yum install -y policycoreutils-devel
if [ -f /lib/systemd/system/mariadb.service ]; then
    systemctl stop mariadb
    mv /lib/systemd/system/{mariadb,mysqld}.service
    systemctl enable mysqld
    systemctl start mysqld
fi

Once we have released MariaDb RPM packages, the corresponding upgrade will undo this indirection.

Installation of the Squirro cluster node happens with two separate packages. The first package installs the required Linux users and the second installs the services. Use the following commands for the installation:

Code Block
languagebash
yum install squirro-cluster-node-users
yum install squirro-cluster-node

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