§2023-08-03

Put /opt/xfs/mongodb/log/mongod-27999.log　　under syslog control

• sudo nano /etc/logrotate.d/mongodb

/opt/xfs/mongodb/log/*.log {
    weekly      <-- or daily
    rotate 4
    notifempty
    compress
    delaycompress
    create 644 mongodb mongodb
}

The directives used are as follows:

• weekly: Specifies the rotation frequency. In this case, the log file will be rotated once a week.
• rotate 4: Defines the number of archived log files to keep. In this case, it will retain up to 4 archived versions.
• notifempty: Rotates the log only if it's not empty.
• compress: Compresses the rotated log files using gzip.
• delaycompress: Delays the compression of the previous log file until the next rotation.
• create 644 mongodb mongodb: Specifies the permissions and ownership of the newly created log file after rotation. In this case, it creates a new log file with the owner and group set to "mongodb" and permissions set to 644 (readable by owner, readable by group, and re

Then

• sudo pacman -S logrotate or sudo apt install logrotate

• sudo logrotate /etc/logrotate.d/mongodb --force

[alexlai@orgpi5Arch ~]$ sudo logrotate /etc/logrotate.d/mongodb --force
[alexlai@orgpi5Arch ~]$ ls /opt/xfs/mongodb/log/mongod*
/opt/xfs/mongodb/log/mongod-27999.log    /opt/xfs/mongodb/log/mongod.log
/opt/xfs/mongodb/log/mongod-27999.log.1  /opt/xfs/mongodb/log/mongod.log.1

put all log files in the directory /opt/xfs/mongodb/log under syslog control, you can use the rsyslog daemon, which is a modern and flexible syslog implementation available in most Linux distributions. It allows you to configure rules to process and forward log messages based on various criteria, including log file locations.

Here's how you can achieve this:

Install rsyslog:

If you don't have rsyslog installed, you can install it using your package manager. For example, on Debian/Ubuntu-based systems, you can use:

sudo apt-get update
sudo apt-get install rsyslog

• Create a configuration file:

Next, create a configuration file to handle logs from /opt/xfs/mongodb/log. Let's create a file named mongodb.conf in the /etc/rsyslog.d/ directory:

• sudo nano /etc/rsyslog.d/mongodb.conf Add the configuration:

In the mongodb.conf file, add the following lines:

plaintext Copy code

Log all files in /opt/xfs/mongodb/log to the MongoDB log file

input(type="imfile" File="/opt/xfs/mongodb/log/*.log" Tag="mongodb:") if $programname == 'mongodb:' then /opt/xfs/mongodb/log/mongod-27999.log The above configuration tells rsyslog to monitor all files with a .log extension in the /opt/xfs/mongodb/log directory and tag them with "mongodb:". Then, it filters messages with that tag and directs them to the specified MongoDB log file (/opt/xfs/mongodb/log/mongod-27999.log).

Restart rsyslog:

After creating or modifying the configuration, you need to restart the rsyslog service for the changes to take effect:

bash Copy code sudo service rsyslog restart With this setup, all log messages generated in any .log file within the /opt/xfs/mongodb/log directory will be forwarded to the specified MongoDB log file (/opt/xfs/mongodb/log/mongod-27999.log) via rsyslog. The log files in that directory will now be under syslog control and can be managed accordingly, including log rotation using logrotate or other methods.

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