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Guide for Registering Tibero Startup/Shutdown Systemd Service Related to Redhat Pacemakers Integration

Document Type | Technical Information

Category l Interface/Integration

Applicable Product Version | Tibero 6 (FS07)

Document Number | TIITI035

Overview

This document guides you through creating database startup/shutdown services using system unit files and systemctl commands when integrating Pacemakers on Redhat 8.X.

 

Method

Test Environment

OS: Red Hat Enterprise Linux release 8.2 (Ootpa)

Kernel: Linux finlin 4.18.0-193.el8.x86_64 #1 SMP Fri Mar 27 14:35:58 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Tibero Version: Tibero 6 (DB 6.0 FS07_CS_2005)

 

Startup / Shutdown Scripts

#!/bin/bash

su - test -c "tbdown clean"

su - test -c "tbboot"

exit 0

start.sh

#!/bin/bash

su - test -c "tbdown immediate"

exit

## Change to tbdown abort during redundancy testing

stop.sh

 

After creating the start/stop shells, it is necessary to change the owner's execution permissions.

$ chmod o+x /tmp/tibero/start.sh
$ chmod o+x /tmp/tibero/stop.sh

 

1. Writing the Systemd Unit Script

# Execute as root
Creation path: /lib/systemd/system/dbtib.service
$ vi /lib/systemd/system/dbtib.service
[Unit]
Description=The Tibero Database Service
After=syslog.target network.target

[Service]
# systemd ignores PAM limits, so set any necessary limits in the service.
# Not really a bug, but a feature.
# https://bugzilla.redhat.com/show_bug.cgi?id=754285
LimitMEMLOCK=infinity
LimitNOFILE=65535

#Type=simple
Type=forking # When using forking type, systemctl status shows the forked process
# idle: similar to simple, the actual execution of the service binary is delayed
# until all jobs are finished, which avoids mixing the status output with shell output of services.
RemainAfterExit=yes
Restart=no

## Tibero Stop
ExecStop=/bin/bash -c '/tmp/tibero/stop.sh'

## Tibero Start
ExecStart=/bin/bash -c '/tmp/tibero/start.sh'

[Install]
WantedBy=multi-user.target

 

2. systemctl Operations (execute as root user)

2.1 Reload Service

$ sysctlctl daemon-reload

 

2.2 Check Service

$ systemctl status dbtib.service

 

2.3 Start Service

$ systemctl start dbtib.service

[simple type]

[forking type]

 

2.4 Stop Service

$ systemctl stop dbtib.service

 

2.5 Enable Service

$ systemctl enable dbtib.service

 

Notes

systemd

An init system that bootstraps user space and ultimately manages all processes instead of Unix System V or BSD init systems on some Linux distributions.

  • The "d" added after the name systemd stands for daemon in Unix.
  • It is released as free and open-source software licensed under GNU LGPL version 2.1 or later.
  • One of systemd's primary goals is to unify basic Linux configurations and service operations across all distributions.

 

systemctl

A tool to control Linux's systemd and service manager.

  • Provides overall management functions such as service status diagnosis, configuration changes, startup, and shutdown.

 

Regarding Pacemaker Integration

  • From Redhat 8.x onwards, it is recommended to register and manage systemd unit files in systemd when integrating Pacemaker.
  • Tibero requires provision either in the old init file format or as a Systemd unit file.
  • Currently, RHEL7/8 trends towards managing fstab and file systems with Systemd as well. (OCF method)
  • If Systemd unit files are not possible, the init file must contain all start/stop/status information in a single file. (LSB method)

 

 

 

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