Installs multiple service instances of the sigsci-agent (tcp listener only).

sigsci-agent-install-multi.sh

sigsci-agent-install-multi.sh
# Installs multiple service instances of the sigsci-agent (tcp listener only).
# Note: this does not modify the default sigsci-agent installation.
#
# This script takes two arguments:
#  The first argument (required) specifies how many new service instances to create.
#  The second argument (optional) sepcifies what port the first service instance
#  should listen on. It will automaticly increment the port number for each new instance.
#
# Usage:
#  ./sigsci-agent-install-multi.sh <number of service instances> [start port]

if [ -z $1 ];
then
        echo "You must specify how many agents you want to setup, 1 through 9."
        exit
fi

if (( $1 > 9 ));
then
        echo "For sanity, a max of 9 new instances is enforced."
        echo "To override, modify this script."
        exit
fi

exit

if [ -z $2 ];
then
        port=10000
else
        port=$2
fi

if [ ! -f /usr/sbin/sigsci-agent ];
then
        echo "Agent 0 is not installed. Please install the sigsci-agent before running."
        exit
fi

echo "Setting up $1 agent(s)..."

for ((i = 1; i <= $1; i++));
do
        echo "- Agent $i..."

        # Create required files
        config_file=/etc/sigsci/agent-$i.conf
        touch $config_file
        service_file=/lib/systemd/system/sigsci-agent-$i.service
        touch $service_file

        # Generate config file content
        echo "-- Generating $config_file..."
        echo "accesskeyid = \"changeme\"" > $config_file
        echo "secretaccesskey = \"changeme\"" >> $config_file
        echo "server-hostname = \"${HOSTNAME}-${port}\"" >> $config_file
        echo "rpc-address = \"tcp://0.0.0.0:$port\"" >> $config_file

        # Generate service file content
        echo "-- Generating $service_file..."
        echo "[Unit]" > $service_file
        echo "Description=Signal Sciences Agent $i" >> $service_file
        echo "After=network.target remote-fs.target nss-lookup.target" >> $service_file
        echo "" >> $service_file
        echo "[Service]" >> $service_file
        echo "EnvironmentFile=/etc/default/sigsci-agent" >> $service_file
        echo "ExecStart=/usr/sbin/sigsci-agent --config /etc/sigsci/agent-$i.conf" >> $service_file
        echo "Restart=on-abort" >> $service_file
        echo "TimeoutSec=15" >> $service_file
        echo "" >> $service_file
        echo "[Install]" >> $service_file
        echo "WantedBy=multi-user.target" >> $service_file

        # Enable sigsci-agent to start on boot
        echo "Enabling sigsci-agent-$i on boot..."
        systemctl enable sigsci-agent-$i

        echo "Complete!"

        ((port++))
done;

# Reload all units
systemctl daemon-reload

echo "Finished installing $1 agent(s). Remember to update each agent config file in /etc/sigsci"
ls /etc/sigsci