The first step is to add our server GPG key to your keyring, on that way you can get our signed packages:
$ wget -qO - https://packages.fluentbit.io/fluentbit.key | sudo apt-key add -
On Debian and derivated systems such as Raspbian, you need to add our APT server entry to your sources lists, please add the following content at bottom of your /etc/apt/sources.list file:
deb https://packages.fluentbit.io/raspbian/stretch stretch main
deb https://packages.fluentbit.io/raspbian/jessie jessie main
Now let your system update the apt database:
$ sudo apt-get update
Using the following apt-get command you are able now to install the latest td-agent-bit:
$ sudo apt-get install td-agent-bit
Now the following step is to instruct systemd to enable the service:
$ sudo service td-agent-bit start
If you do a status check, you should see a similar output like this:
sudo service td-agent-bit status● td-agent-bit.service - TD Agent BitLoaded: loaded (/lib/systemd/system/td-agent-bit.service; disabled; vendor preset: enabled)Active: active (running) since mié 2016-07-06 16:58:25 CST; 2h 45min agoMain PID: 6739 (td-agent-bit)Tasks: 1Memory: 656.0KCPU: 1.393sCGroup: /system.slice/td-agent-bit.service└─6739 /opt/td-agent-bit/bin/td-agent-bit -c /etc/td-agent-bit/td-agent-bit.conf...
The default configuration of td-agent-bit is collecting metrics of CPU usage and sending the records to the standard output, you can see the outgoing data in your /var/log/syslog file.