Chapter 102. Collecting IdM Healthcheck information Healthcheck has been designed as a manual command line tool which should help you to identify possible problems in Identity Management (IdM). You can create a collection of logs based on the Healthcheck output with 30-day rotation. Prerequisites The Healthcheck tool is only available on RHEL 8.1 or newer 102.1. Healthcheck in IdM The Healthcheck tool in Identity Management (IdM) helps find issues that may impact the health of your IdM environment. Note The Healthcheck tool is a command line tool that can be used without Kerberos authentication. Modules are Independent Healthcheck consists of independent modules which test for: Replication issues Certificate validity Certificate Authority infrastructure issues IdM and Active Directory trust issues Correct file permissions and ownership settings Two output formats Healthcheck generates the following outputs, which you can set using the output-type option: json : Machine-readable output in JSON format (default) human : Human-readable output You can specify a different file destination with the --output-file option. Results Each Healthcheck module returns one of the following results: SUCCESS configured as expected WARNING not an error, but worth keeping an eye on or evaluating ERROR not configured as expected CRITICAL not configured as expected, with a high possibility for impact 102.2. Log rotation Log rotation creates a new log file every day, and the files are organized by date. Since log files are saved in the same directory, you can select a particular log file according to the date. Rotation means that there is configured a number for max number of log files and if the number is exceeded, the newest file rewrites and renames the oldest one. For example, if the rotation number is 30, the thirty-first log file replaces the first (oldest) one. Log rotation reduces voluminous log files and organizes them, which can help with analysis of the logs. 102.3. Configuring log rotation using the IdM Healthcheck Follow this procedure to configure a log rotation with: The systemd timer The crond service The systemd timer runs the Healthcheck tool periodically and generates the logs. The default value is set to 4 a.m. every day. The crond service is used for log rotation. The default log name is healthcheck.log and the rotated logs use the healthcheck.log-YYYYMMDD format. Prerequisites You must execute commands as root. Procedure Enable a systemd timer: Start the systemd timer: Open the /etc/logrotate.d/ipahealthcheck file to configure the number of logs which should be saved. By default, log rotation is set up for 30 days. In the /etc/logrotate.d/ipahealthcheck file, configure the path to the logs. By default, logs are saved in the /var/log/ipa/healthcheck/ directory. In the /etc/logrotate.d/ipahealthcheck file, configure the time for log generation. By default, a log is created daily at 4 a.m. To use log rotation, ensure that the crond service is enabled and running: To start with generating logs, start the IPA healthcheck service: To verify the result, go to /var/log/ipa/healthcheck/ and check if logs are created correctly. 102.4. Changing IdM Healthcheck configuration You can change Healthcheck settings by adding the desired command line options to the /etc/ipahealthcheck/ipahealthcheck.conf file. This can be useful when, for example, you configured a log rotation and want to ensure the logs are in a format suitable for automatic analysis, but do not want to set up a new timer. Note This Healthcheck feature is only available on RHEL 8.7 and newer. After the modification, all logs that Healthcheck creates follow the new settings. These settings also apply to any manual execution of Healthcheck. Note When running Healthcheck manually, settings in the configuration file take precedence over options specified in the command line. For example, if output_type is set to human in the configuration file, specifying json on the command line has no effect. Any command line options you use that are not specified in the configuration file are applied normally. Additional resources Configuring log rotation using the IdM Healthcheck 102.5. Configuring Healthcheck to change the output logs format Follow this procedure to configure Healthcheck with a timer already set up. In this example, you configure Healthcheck to produce logs in a human-readable format and to also include successful results instead of only errors. Prerequisites Your system is running RHEL 8.7 or later. You have root privileges. You have previously configured log rotation on a timer. Procedure Open the /etc/ipahealthcheck/ipahealthcheck.conf file in a text editor. Add options output_type=human and all=True to the [default] section. Save and close the file. Verification Run Healthcheck manually: Go to /var/log/ipa/healthcheck/ and check that the logs are in the correct format. Additional resources Configuring log rotation using the IdM Healthcheck

Commands:
systemctl enable ipa-healthcheck.timer Created symlink /etc/systemd/system/multi-user.target.wants/ipa-healthcheck.timer -> /usr/lib/systemd/system/ipa-healthcheck.timer.
systemctl start ipa-healthcheck.timer
systemctl enable crond systemctl start crond
systemctl start ipa-healthcheck
ipa-healthcheck