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Abstract
Hello everyone, It’s candle.
In this time, I will show you how to set up td-agent-ui and operation check.
Td-agent is easier than fluentd to operate on the server.
Precondition
Td-agent is installed
Please refer to the following article when building td-agent to Centos 6.5.
For EC2, here
Launching of td-agent
td-agent-ui is already installed when you install td-agent.
The launch command of td-agent-ui is this.
sudo td-agent-ui start
You may caught some warning, It’ probably no problem.
Set up td-agent-ui
After starting server, let’s access to td-agent-ui.
You access to own IP address + 9292.
For vagrant, the IP address written in Vagrantfile.
For EC2, let’s access the public IP address.
Account name is “admin”, password is “changeme”.
After login, the setup page will appear.
Chnage the password
First, You would change the password.
If anybody access to your server from anywhere, default password is dangerous.
Click the “Password” fron the left menu.
Enter “changeme” to the current password and set a new password
Set up td-agent
Back to the top page and set up td-agent.
In the top page, there are “Setup fluentd” and “Setup td-agent”.
Both can use the function of fluentd.
I recommend td-agent.
Click “Setup td-agent”.
The page to create configuration file display.
There are already files exists such as “/etc/td-agent/td-agent.conf” before pressing “Create” button.
Click “create” button.
After that, the following page will be displayed.
If logs are not displayed, let’s restart “td-agent”.
It’s over.
Td-agent log setting
Let’s try to set up to collect the log by the td-agent conf file.
There is the td-agent conf file.
/etc/td-agent/td-agent.conf
Of course, you can edit it in CUI,
Let’s edit it from td-agent-ui.
Choose “Config File” from the left menu.
Click the “Edit” button.
Considering security, it is better to delete the settings that are not used.
Delete all contents of the setting file and write the following.
<source> @type forward </source> <match debug.**> type stdout </match>
Press “Update & Restart” button.
The above setting meaning is like this.
In this case it will receive the log from type forward.
In
Debugging with fluent-cat
Let’s try to get the tag of debug.**.
The fluent-cat command send data to fluentd (td-agent) with tcp.
The location of the fluent-cat command is in a place where PATH does not through.
/opt/td-agent/embedded/bin/fluent-cat
The following command, you can send data to fluentd.
echo '{"I say":"hello"}' | /opt/td-agent/embedded/bin/fluent-cat debug.ok
The contents of echo are json. You throw it to td-agent with a tag called debug.ok.
Nothing is displayed on the terminal,
Looking at the log on the browser, it certainly arrived.
It is success.
Conclusion
One last thing, even though td-agent-ui is useful, it is dangerous in security.
You should not launch td-agent as much as possible, even if you activate it, restrict access by IP address.
