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

...

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

...

RHEL6 / Centos 6RHEL7 / Centos 7


Code Block
languagebash
service monit start
monit -g all-manual start



Code Block
languagebash
echo "Starting Squirro services"
cd /lib/systemd/system
for service in $(ls sq*d.service); do
    echo "Starting $service"
    systemctl restart $service
done


Note

We are deprecating the use of monit and have removed monit from our centos 7 installations already.



Multi-node cluster setup

There are some additional steps that need to be performed when you wish to run Squirro across multiple nodes, as some orchestration between cluster members is needed. 

This is handled by a service called zookeeper and we provide our own zookeeper library with Squirro - it needs to be installed separately, though, with:

Code Block
languagebash
yum install squirro-python-squirro.lib.zookeeper