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STONITH
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » STONITH
STONITH (Shoot The Other Node in the Head) is a fencing technique for remotely powering down a node in a cluster. LifeKeeper can provide STONITH capabilities by using external power switch controls, IPMI-enabled motherboard controls, hypervisor-provided power…
STONITH in AWS Environment
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » STONITH » STONITH in AWS Environment
By using STONITH, you can turn off the power to prevent a faulty node from accessing or corrupting the shared data. When used in conjunction with Quorum/Witness, it strengthens the prevention of split-brain scenarios. Combining the use of stopping the Linux kernel via…
STONITH in VMware vSphere Environments
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » STONITH » STONITH in VMware vSphere Environments
ESXCLI is a command-line interface supported by Broadcom for managing virtual infrastructure, including ESXi hosts and virtual machines. You can select appropriate ESXCLI commands to implement LifeKeeper STONITH functionality between VMware virtual machines. In this…
STONITH in Microsoft Azure Environments
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » STONITH » STONITH in Microsoft Azure Environments
The Azure CLI is a command line interface supported by Microsoft to manage Azure resources such as virtual machines. Used with STONITH, it allows the cluster software to power off a cluster node that appears to have died thus ensuring that the unhealthy node cannot…
STONITH using IPMI
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » STONITH » STONITH using IPMI
IPMI (Intelligent Platform Management Interface) defines a set of common interfaces to a computer system which can be used to monitor system health and manage the system. Used with STONITH, it allows the cluster software to instruct the switch via a serial or network…
Signing In
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Signing In
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. In the LKWMC, PAM (Pluggable Authentication Module) authentication is used to authenticate users based on their…
In Service Dialog
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Dialogs » In Service Dialog
Select a Server. The first dialog provides a drop-down list box containing the names of servers in your LifeKeeper cluster. Select the Server where you want to bring the resource instance into service. Click on the Next button to proceed to the next dialog. *Note:…
Sign-in status
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Server » Sign-in status
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. Clicking the Sign-in status menu item in the Server section of the left menu will display the authentication status for…
Considering the Use of Quorum/Witness or STONITH when Connecting to a LifeKeeper Cluster using AWS
Quick Start Guides » Multi-VPC Cluster Configuration Using AWS VPC Peering Connections Quick Start Guide » Connecting to a LifeKeeper Cluster using AWS Settings and Operations Considerations » Considering the Use of Quorum/Witness or STONITH when Connecting to a LifeKeeper Cluster using AWS
Since the shared disk environment cannot be used in an AWS environment, you cannot use SCSI reservations to prevent a split-brain. Also, an IP resource may cause the split-brain as it uses the real IP resource with different IP addresses for each node. For this…
ERS Resource Types in LifeKeeper
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Administration » ERS Resource Types in LifeKeeper
*IMPORTANT: In keeping with industry best practices and announced with the release of v9.6.2, beginning with v9.7.0 SIOS will no longer support new or existing configurations with NFS servers/clients on the same nodes as the SAP services when setting up an SAP system…
Disable Autostart in ERS Profile
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Troubleshooting » Disable Autostart in ERS Profile
Symptom: A status check of an ERS Instance causes a sapstart for the selected instance. ERS instance is always running on both systems. Cause: When an ERS Instance has Autostart=1 set in the profile, certain sapcontrol calls will cause the instance to be started as…
Bringing a Resource In Service
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Operator Tasks » Bringing a Resource In Service
*Note: LifeKeeper puts resources in-service from the bottom of the hierarchy and works its way to the top level resource. When putting all of the resources in one hierarchy in-service, select the top (parent) resource in the hierarchy. There are five possible ways…
LifeKeeper-Specific Configurations in Azure
Quick Start Guides » Microsoft Azure Quick Start Guide » LifeKeeper-Specific Configurations in Azure
Please refer to the LifeKeeper Evaluation Guide for Cloud Environments.
Bringing a Resource In Service
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Resource » Resource Tree » Bringing a Resource In Service
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. There are two ways to bring a resource hierarchy in service. Click the Operations button in the Resource Tree and…
Bringing a DRBD Resource In Service
LifeKeeper for Linux Technical Documentation » Data Replication » DRBD Recovery Kit » Resource Configuration Tasks » Bringing a DRBD Resource In Service
Bringing a DRBD resource in service will “up” the resource on all servers and set the in-service server to “primary”. Data synchronization will begin as soon as the servers are brought “up” and connections are established by DRBD. There are 3 ways to…
Quorum/Witness Cluster Recommendations in AWS
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » Quorum/Witness » Quorum/Witness Cluster Recommendations in AWS
On this page you will find cluster configurations that provide ways you can help setup your quorum/witness alongside existing nodes within an AWS cloud environment. Key for diagrams below: 2 Node, Single Region Deployment If both nodes all reside in the same…
Bringing a DataKeeper Resource In Service
LifeKeeper for Linux Technical Documentation » Data Replication » DataKeeper » SIOS DataKeeper Installation and Configuration » Resource Configuration Tasks » Bringing a DataKeeper Resource In Service
Bringing a DataKeeper resource in service is similar to creating the resource: LifeKeeper starts the nbd server and client, starts the md device which synchronizes the data between the source and target devices, and mounts the file system (if…
inqfail error in the LifeKeeper Log
Application Recovery Kits » Oracle Recovery Kit Administration Guide » Oracle Troubleshooting » Oracle Known Issues and Restrictions » inqfail error in the LifeKeeper Log
If an inqfail error appears in your LifeKeeper error log following a failover, you will need to change the filesystemio setting. Note: The disk id and server name will be different for each configuration. To resolve this problem, you will need to change the setting…
Documentation Style Used in this Guide
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Documentation Style Used in this Guide
Most of the steps documented in this tutorial describe an environment consisting of two nodes (node-a and node-b). Examples of user command execution are shown within the guide. The sections below show the styles used to indicate the different nodes or users used to…
Network Structure Used in this Tutorial
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Configuring Network Components and Creating Instances » Network Structure Used in this Tutorial
In this tutorial three nodes will be created. Node-A and Node-B will be used as the Active node and Standby node, respectively. In addition to these two nodes, Node-C (the Quorum/Witness node), will also be created. (See What is for an explanation of the need for a…
Computing Resources Used in this Tutorial
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Configuring Network Components and Creating Instances » Computing Resources Used in this Tutorial
As discussed earlier, two nodes will be configured in a network to complete tasks in this tutorial. Please refer to the LifeKeeper for Linux Release Notes as well as the resource plan for the resource(s) to be protected (e.g., Oracle). Check to ensure that the…
Managing Log Retention in Multitarget Replication Environments
Application Recovery Kits » SAP HANA Recovery Kit Administration Guide » SAP HANA Resource Hierarchy Administration » Managing Log Retention in Multitarget Replication Environments
Log Retention Settings In accordance with the SAP HANA documentation, if a primary system is replicating to more than one secondary system, force log retention and log retention propagation should be used to reach an optimized re-sync and avoid a full datashipping…
Creating an Instance in Azure from Scratch
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Configuring Network Components and Creating Instances » Creating an Instance in Azure from Scratch
!Disclaimer: The user interface may vary between regions or change over time. Please refer to the documentation provided by Azure if the screenshots shown below are different from your experience. The Evaluation Guide uses the following network structure and…
Switching between Nodes in a Cloud Environment
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Protecting Our Resources » Switching between Nodes in a Cloud Environment
If you are operating in a cloud environment, there is an extra step to switch a virtual IP address between nodes. The following topics explain the background information and general approaches for each cloud environment: AWS Route Table Scenario AWS Elastic IP…
Structure of LCD Directory in /opt/LifeKeeper
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Advanced Tasks » LCD » Structure of LCD Directory in /opt/LifeKeeper
The following diagram shows the directory structure of /opt/LifeKeeper.
Creating an Instance in AWS from Scratch
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Configuring Network Components and Creating Instances » Creating an Instance in AWS from Scratch
!Disclaimer: The user interface may vary between regions or change over time. Please refer to the documentation provided by AWS if screenshots shown below are different from your experience. This Evaluation Guide uses the following network structure and instances. …
SAP Error Messages During Failover or In-Service
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Troubleshooting » SAP Error Messages During Failover or In-Service
After a failover of a SAP, there will be error messages in the SAP logs. Many of these error messages are normal and can be ignored. On Failure of the DB BVx: Work Process is in reconnect status – This error message simply states that a work progress has lost the…
Creating an Instance in Google Cloud from Scratch
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Configuring Network Components and Creating Instances » Creating an Instance in Google Cloud from Scratch
!Disclaimer: The user interface may vary between regions or change over time. Please refer to the documentation provided by Google Cloud if the screenshots shown below are different from your experience. This Evaluation Guide uses the following network structure and…
tset Errors Appear in the LifeKeeper Log File
Application Recovery Kits » SAP Recovery Kit Administration Guide » tset Errors Appear in the LifeKeeper Log File
Cause: The su commands used by the SAP and Database Recovery Kits cause a ‘tset’ error message to be output to the LK log that appears as follows: tset: standard error: Invalid argument This error comes from one of the profile files in the SAP…
Available I/O Fencing Mechanisms (Virtual Machines in VMware)
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » I/O Fencing Mechanisms » Available I/O Fencing Mechanisms (Virtual Machines in VMware)
This page describes the combinations of fencing mechanisms that can be used with various storage configurations in a VMware virtual server environment. Shared Disk Configuration (Single or Multipath Configuration Using SCSI Reservations) This configuration…
Considerations for Settings and Operations in AWS VPC Peering
Quick Start Guides » Connection Between LifeKeeper Cluster and Clients Using AWS Transit Gateway Quick Start Guide » Considerations for Settings and Operations in AWS VPC Peering
Considering the Use of LifeKeeper I-O Fencing – AWS VPC Peering
Considerations for Settings and Operations in AWS Direct Connect
Quick Start Guides » AWS Direct Connect Quick Start Guide » Considerations for Settings and Operations in AWS Direct Connect
Considering the Use of LifeKeeper I-O Fencing Since the shared disk environment cannot be used in an AWS environment, you cannot use SCSI reservations to prevent a split-brain. IP resources may cause a split-brain as it uses the real IP resource with different IP…
Postfix Resource In-Service / Out-of-Service / Health Monitoring Error Messages
Application Recovery Kits » Postfix Recovery Kit Administration Guide » Postfix Troubleshooting » Postfix Resource In-Service / Out-of-Service / Health Monitoring Error Messages
Error Error Message Master process of postfix is not running The master process of Postfix is not running. Please check the Postfix error log. Failed in a check by postfix command Postfix command check option has failed.…
SYS – LifeKeeper Commands Related to the Systems in the LifeKeeper Cluster
LifeKeeper for Linux Technical Documentation » Command Line Interface » Commands » SYS – LifeKeeper Commands Related to the Systems in the LifeKeeper Cluster
sys_list – Lists out the systems known to a particular LifeKeeper node Options: -d sys_create – Creates knowledge of another system on LifeKeeper node Options: -s -d sys_remove – Removes knowledge of another system on a LifeKeeper…
Connecting to the LKWMC Through a Bastion Host in a Cloud Environment
LifeKeeper Web Management Console (LKWMC) » Getting Started » Connecting to the LKWMC » Connecting to the LKWMC Through a Bastion Host in a Cloud Environment
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. The steps given below describe how to use SSH port forwarding through a bastion host located in a public subnet to…
How to Setup Amazon FSx for NetApp ONTAP
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Protecting Our Resources » How to Use a Shared Disk with the File System » How to Setup Amazon FSx for NetApp ONTAP
This document describes how to set up LifeKeeper to use Amazon FSx for NetApp ONTAP. Amazon FSx for NetApp ONTAP can be accessed via the iSCSI protocol or NFS as a shared disk from LifeKeeper. By configuring a multi-AZ, it ensures availability even if one of the…
Considering the Use of LifeKeeper I-O Fencing – AWS VPC Peering
Quick Start Guides » Connection Between LifeKeeper Cluster and Clients Using AWS Transit Gateway Quick Start Guide » Considerations for Settings and Operations in AWS VPC Peering » Considering the Use of LifeKeeper I-O Fencing – AWS VPC Peering
Since an AWS environment does not support shared disk configurations, SCSI reservations cannot be used to prevent split brain scenarios. For this reason, consider using the Quorum/Witness Server or STONITH, LifeKeeper’s I/O fencing functionality, to operate more…
Disabling Reservations
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » Disabling Reservations
While reservations provide the highest level of data protection for shared storage, in some cases, the use of reservations is not available and must be disabled within LifeKeeper. With reservations disabled, the storage no longer acts as an arbitrator in cases where…
Mirroring with SIOS DataKeeper for Linux
LifeKeeper for Linux Technical Documentation » Data Replication » DataKeeper » Mirroring with SIOS DataKeeper for Linux
SIOS DataKeeper for Linux offers an alternative for customers who want to build a high availability cluster (using SIOS LifeKeeper) without shared storage or who simply want to replicate business-critical data in real-time between servers. SIOS DataKeeper uses either…
I/O Fencing Mechanisms
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » I/O Fencing Mechanisms
LifeKeeper for Linux provides various fencing mechanisms. Depending on the server and storage configuration, available fencing mechanisms and allowed combinations of these may differ. Refer to the information linked below for fencing mechanisms available in each…
Available I/O Fencing Mechanisms (Physical Servers)
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » I/O Fencing Mechanisms » Available I/O Fencing Mechanisms (Physical Servers)
This page describes the combinations of fencing mechanisms that can be used with various storage configurations in a physical server environment. Shared Disk Configuration (Single or Multipath Configuration Using SCSI Reservations) This configuration corresponds to…
Connecting to a LifeKeeper Cluster using AWS Settings and Operations Considerations
Quick Start Guides » Multi-VPC Cluster Configuration Using AWS VPC Peering Connections Quick Start Guide » Connecting to a LifeKeeper Cluster using AWS Settings and Operations Considerations
Please see the following topics for additional considerations when connecting to an AWS cluster using VPC peering and AWS Route53: Considering the Use of Quorum/Witness or STONITH when Connecting to a LifeKeeper Cluster using AWS Connecting to LifeKeeper Using AWS…
LifeKeeper Configuration Steps
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper Configuration Steps
If you have installed your LifeKeeper environment as described in the LifeKeeper for Linux Installation Guide, you should be ready to start and configure the LifeKeeper for Linux software on each server in your cluster. Follow the steps below which contain links to…
Common Causes of a LifeKeeper Initiated Failover
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Common Causes of a LifeKeeper Initiated Failover
In the event of a failure, LifeKeeper has two methods of recovery: local recovery and inter-server recovery. If local recovery fails, a “failover” is implemented. A failover is defined as automatic switching to a backup server upon the failure or abnormal…
NAS Configuration Considerations
Application Recovery Kits » NAS Recovery Kit Administration Guide » Configuring the LifeKeeper for Linux NAS Recovery Kit » NAS Configuration Considerations
The following should be considered before operating the LifeKeeper for Linux NAS Recovery Kit: Install the NAS Recovery Kit on the server(s) in your cluster configuration where you wish to mount your exported file systems and where you will extend your NAS resource…
Technical Notes
LifeKeeper for Linux Release Notes » Technical Notes
*We strongly recommend that you read the following technical notes concerning configuration and operational issues related to your LifeKeeper environment. LifeKeeper Features Item Description Licensing LifeKeeper requires unique runtime…
I/O Fencing Chart
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » Disabling Reservations » I/O Fencing Chart
Split-Brain …
New Features
LifeKeeper for Linux Release Notes » New Features
New Features of Supported Versions of LifeKeeper for Linux Version 9 *Refer to https://docs.us.sios.com/alllinux.php for older versions of the documentation. Product Feature New in Version 9.9.0 LifeKeeper Core MySQL 8.4 is…
Storage and Adapter Configuration
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » Storage and Adapter Configuration
Item Description Azure Shared Disk Protecting Applications and File Systems: In order for the Azure shared disk to be properly configured in LifeKeeper the steeleye-lkSCSI3 recovery kit must be installed. The steeleye-lkSCSI3 recovery kit…
Supported Storage
Supported Storage
Supported Storage List for LifeKeeper for Linux v9 The table below is a list of LifeKeeper for Linux v9 supported storage and should be considered when configuring your environment. About Supported Storage Some types of storage used as shared storage in LifeKeeper…
Perform SAP Tests
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Installation » Perform SAP Tests
Perform the following series of tests. The test steps are different for each configuration. Some steps call for verifying that SAP is running correctly but do not call out specific tests to perform. For a list of possible tests to perform to verify that SAP is…
SAP HANA Hierarchy Restore Failures
Application Recovery Kits » SAP HANA Recovery Kit Administration Guide » SAP HANA Troubleshooting » SAP HANA Hierarchy Restore Failures
SAP HANA resource fails restore due to inconsistent or out-of-date data The SAP HANA Recovery kit will not allow the SAP HANA resource (database) in-service on a system that may have inconsistent or out-of-date data. To maintain data consistency the following flags…
Recovery Kit for MySQL Operations Overview
Application Recovery Kits » Recovery Kit for MySQL Administration Guide » Recovery Kit for MySQL Operations Overview
Bringing a Resource In Service (restore) Start the MySQL resource in the following order. Check the same items as in the monitoring process described later to confirm that MySQL is running. If it is determined that MySQL is running, the startup process ends…
Maintaining a LifeKeeper Protected System
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Maintenance Tasks » Maintaining a LifeKeeper Protected System
When performing shutdown and maintenance on a LifeKeeper-protected server, you must put that system’s resource hierarchies in service on the backup server before performing maintenance. This process stops all activity for shared disks on the system needing…
Resource Tree
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Resource » Resource Tree
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. The Resource Tree provides a view of LifeKeeper-protected resources and resource hierarchies, along with the current…
Apache Extend Hierarchy Errors
Application Recovery Kits » Apache Recovery Kit Administration Guide » Apache Web Server Troubleshooting » Apache Extend Hierarchy Errors
The error messages that might be displayed during Apache hierarchy extension are listed below, along with a suggested explanation for each. Note that these error messages appear when the GUI indicates it is “Executing the pre-extend script….” to validate the…
MySQL – Known Issues / Restrictions
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Known Issues and Restrictions » MySQL – Known Issues / Restrictions
Description The “include” directive is not supported The “include” directive is not supported. All the setup configuration information must be described in a single my.cnf file. Crash Recovery Restarting MySQL…
Running Multiple Instances of Samba
Application Recovery Kits » Samba Recovery Kit Administration Guide » Configuring Samba with LifeKeeper » Running Multiple Instances of Samba
Running multiple instances of Samba in a LifeKeeper cluster introduces additional configuration requirements and restrictions. The following Samba configuration scenarios may involve multiple instances of Samba: Active/Standby configuration with multiple LifeKeeper…
I/O Fencing with DataKeeper Configuration
LifeKeeper for Linux Technical Documentation » Data Replication » DataKeeper » SIOS DataKeeper Installation and Configuration » I/O Fencing with DataKeeper Configuration
In principle, I/O fencing using storage reservations is not available in DataKeeper configuration and split brain can occur. Therefore, you need to take steps to prevent a split brain from occurring via the following controls. Exclusive Control using IP Resources IP…
SAP Configuration Considerations
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Configuration Considerations
*IMPORTANT: In keeping with industry best practices and announced with the release of v9.6.2, beginning with v9.7.0 SIOS will no longer support new or existing configurations with NFS servers/clients on the same nodes as the SAP services when setting up an SAP system…
Verify Data Before Resync (Wait to Resync)
LifeKeeper for Linux Technical Documentation » Data Replication » DataKeeper » Administering SIOS DataKeeper for Linux » Verify Data Before Resync (Wait to Resync)
To avoid replicating corrupt or inconsistent data to targets, LifeKeeper can wait for resources to be in-service before replicating data. Starting with 9.5.2, LifeKeeper will by default wait for parent resources of application type ‘filesys’ to be in-service…
SAP Hierarchy Restore Errors
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Troubleshooting » SAP Hierarchy Restore Errors
Symptom: When attempting to bring an SAP resource hierarchy which does not contain a dependent file system resource back in-service on a previous host node, the in-service (restore) of the SAP resource fails. Messages similar to the following appear in the SAP…
MQ Parameters List
Parameters List » MQ Parameters List
The table below lists and explains names and meanings of the MQ parameters. These values are tuned by editing the /etc/default/LifeKeeper configuration file. Parameter Name Meaning Setting Value Default Value When parameter takes effect…
Sybase ASE Software Asset Manager (SySAM)
Application Recovery Kits » Sybase ASE Recovery Kit Administration Guide » Sybase ASE Recovery Kit Configuration Considerations » Sybase ASE Software Asset Manager (SySAM)
The Sybase Software Asset Management (SySAM) is used to manage licensed Sybase products. At Sybase ASE server startup, each ASE server component checks the license file in its environment for permission to run specific features. In order for the ASE server to do this,…
Properties
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Resource » Properties
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. The current property settings for the resources on each server in the cluster may be viewed in three ways. Click…
Viewing Resource Tags and IDs
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Common Tasks » Viewing Resource Tags and IDs
A resource’s tag and ID can be viewed quickly by positioning the cursor over a resource icon in the status window and clicking the left mouse button once (single-click). The resource tag and ID of the server having the lowest priority number are displayed in the…
[Global] Section of the Configuration File
Application Recovery Kits » Samba Recovery Kit Administration Guide » Configuring Samba with LifeKeeper » [Global] Section of the Configuration File
The [global] section is a special section in the configuration file that must appear in every configuration file used in a LifeKeeper Samba resource hierarchy. As the name implies, any options set in this section apply to all other sections unless that directive is…
Testing Your DRBD Resource Hierarchy
LifeKeeper for Linux Technical Documentation » Data Replication » DRBD Recovery Kit » Resource Configuration Tasks » Testing Your DRBD Resource Hierarchy
You can test your DRBD resource hierarchy by initiating a manual switchover. This will simulate a failover of the resource instances from the primary server to the backup server. Performing a Manual Switchover from the LifeKeeper GUI You can initiate a manual…
Disconnecting from a Cluster
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Common Tasks » Disconnecting from a Cluster
This task disconnects your GUI client from all servers in the cluster, and it does so through the server you select. There are three possible ways to begin. • On the Global Toolbar, click the Disconnect button. • On the Edit Menu, select Server and…
SAP MaxDB Active/Active Considerations
Application Recovery Kits » SAP MaxDB Recovery Kit Administration Guide » SAP MaxDB Configuration Considerations » SAP MaxDB Active/Active Considerations
In an Active/Active configuration, each server is actively running one SAP MaxDB instance while acting as a backup for the other server in case of failure. The following scenario provides specific requirements that must be adhered to in sequential order when protecting…
Maintaining the smvpasswd File
Application Recovery Kits » Samba Recovery Kit Administration Guide » Samba Hierarchy Administration » Maintaining the smvpasswd File
Samba provides four different authentication methods via the security directive. The share and user security settings both require access to the local smbpasswd file to determine if access will be granted. As noted in the section Running Multiple Instances of Samba…
Storage Mode
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » Quorum/Witness » Storage Mode
!Please verify quorum is set up correctly before creating and extending resources as misconfigured quorum may cause inadvertent servers being stopped. With this mode each node writes information about itself to a shared storage device on a regular basis and…
Transferring Resource Hierarchies
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Maintenance Tasks » Transferring Resource Hierarchies
When you need to perform routine maintenance or other tasks on a LifeKeeper Server, you can use the LifeKeeper GUI to move in-service resources to another server. To transfer in-service resource hierarchies from Server A to Server B, use the GUI to bring the…
Status Table
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Status Table
The status table provides a visual representation of the status of connected servers and their resources. It shows: the state of each server in the top row the global (cross-server) state and the parent-child relationships of each resource in the left-most…
Perl 5.8.8 to Perl 5.32.1 Upgrade
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Known Issues and Restrictions » Perl 5.8.8 to Perl 5.32.1 Upgrade
The LifeKeeper for Linux v9.8.0 release includes an upgraded Perl version from 5.8.8 to 5.32.1. The new version has many new features and enhancements. The new features in 5.32.1 can be found in perl5320delta – what is new for perl v5.32.0 – Perldoc…
Recovering from a Panic during a Manual Recovery
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Recovering from a Panic during a Manual Recovery
A PANIC during manual switchover may cause incomplete recovery. If a PANIC or other major system failure occurs during a manual switchover, complete automatic recovery to the back-up system cannot be assured. Check the backup system to make sure all resources required…
Takeover with Handshake
Application Recovery Kits » SAP HANA Recovery Kit Administration Guide » SAP HANA Resource Hierarchy Administration » Takeover with Handshake
Takeover with Handshake of the SAP HANA Database The “takeover with handshake” feature, available in SAP HANA 2.0 SPS04 and later, allows for reduced downtime of the primary database during switchover by suspending the primary database (rather than completely…
Connection Between LifeKeeper Cluster and Clients Using AWS Transit Gateway Quick Start Guide
Quick Start Guides » Connection Between LifeKeeper Cluster and Clients Using AWS Transit Gateway Quick Start Guide
With the release of AWS Transit Gateway and AWS Transit Gateway inter-region peering, the Recovery Kit for EC2 route table scenario is now available for configurations where a client in a VPC (VPC B in the figure below) connects to an HA cluster located in a different…
LVM – Known Issues / Restrictions
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Known Issues and Restrictions » LVM – Known Issues / Restrictions
Description Cannot be used in conjunction with the RAW I/O Recovery Kit The RAW I/O Recovery Kit resources cannot be created for volume areas protected by the LVM Recovery Kit. If there are no raw devices other than those protected by the LVM…
Communication Paths Going Up and Down
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Communication Paths Going Up and Down
If you find the communication paths failing then coming back up repeatedly (the LifeKeeper GUI showing them as Alive, then Dead, then Alive), the heartbeat tunables may not be set to the same values on all servers in the cluster. This situation is also possible if the…
Postfix Hierarchy Creation Error Messages
Application Recovery Kits » Postfix Recovery Kit Administration Guide » Postfix Troubleshooting » Postfix Hierarchy Creation Error Messages
Error Error Message No config path The Postfix configuration path was not found. Please enter the configuration path. main.cf not found in the configuration path The file main.cf does not exist in the path specified.…
SAP Recovery Kit Overview
Application Recovery Kits » SAP Recovery Kit Administration Guide » SAP Recovery Kit Overview
There are some services in the SAP NetWeaver framework that cannot be replicated. They cannot exist more than once for the same SAP system, therefore, they are single points of failure. The LifeKeeper SAP Recovery Kit or Oracle Recovery Kit provides protection for…
LifeKeeper Configuration Tasks for Apache
Application Recovery Kits » Apache Recovery Kit Administration Guide » LifeKeeper Configuration Tasks for Apache
You can perform the following configuration tasks from the LifeKeeper GUI. The following four tasks are described in this guide, as they are unique to an Apache resource instance and different for each Recovery Kit. Create a Resource Hierarchy. Creates an…
Majority Mode
LifeKeeper for Linux Technical Documentation » LifeKeeper » Installation and Configuration » LifeKeeper I/O Fencing Introduction » Quorum/Witness » Majority Mode
Quorum checking is performed via LifeKeeper for Linux communication paths. A node has quorum when it is able to communicate with the majority of the nodes in the cluster.This quorum mode is available on clusters with three or more nodes. A node dedicated for witness…
Recovery Kit for EC2 – Known Issues / Restrictions
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Known Issues and Restrictions » Recovery Kit for EC2 – Known Issues / Restrictions
Description Even though the EC2 instance has been granted sufficient privileges, a warning indicating insufficient privileges is displayed when attempting to create an EC2 resource (the route table scenario), resulting in the failure of resource…
Logical Volume Manager Hierarchy Creation Procedures
Application Recovery Kits » Logical Volume Manager Recovery Kit Administration Guide » LifeKeeper Logical Volume Manager Hierarchy Creation and Administration » Logical Volume Manager Hierarchy Creation Procedures
To create a hierarchy in which a file system or higher-level application uses an LVM logical volume, the following high-level procedure should be followed. Determine the desired configuration of your LVM volume groups and logical volumes. In doing this, keep in mind…
Hierarchy Creation
Application Recovery Kits » Samba Recovery Kit Administration Guide » Samba Troubleshooting » Hierarchy Creation
Error Number Error Message Description 109001 Usage: "valid_cf"CfgPath CfgName TemplateSys The valid_cf script requires three arguments, the directory containing the configuration file, the name of the configuration file and the…
AWS VPC Peering Connections Requirements
Quick Start Guides » Connection Between LifeKeeper Cluster and Clients Using AWS Transit Gateway Quick Start Guide » AWS VPC Peering Connections Requirements
The following requirements should be met when using this configuration. Below is a summary of requirements for the AWS environment and instances created on it. Requirements for AWS environment Create a base environment on AWS to provide services. The requirements for…
SAP Recovery Kit – Known Issues / Restrictions
LifeKeeper for Linux Technical Documentation » LifeKeeper » Troubleshooting » Known Issues and Restrictions » SAP Recovery Kit – Known Issues / Restrictions
Description A split brain may occur for ERS v2 resources while processing a restored comm path If an SAP cluster is configured with quorum and both the ASCS and ERS v2 resources reside on the same node when the communication path is restored to…
DataKeeper for Linux Terms to Know
Evaluation Guides » DataKeeper for Linux Evaluation Guide » DataKeeper for Linux Terms to Know
The following terms are used throughout this document and, while some may be familiar to you, it may be helpful to review how SIOS defines and uses these terms. Network Communication Terms Crossover cable – A cable used to directly connect computing devices…
Terms to Know – Apache
Quick Start Guides » Apache/MySQL Cluster Using Both Shared and Replicated Storage » Terms to Know – Apache
The following terms are used throughout this document and while some may be familiar to you, it may be helpful to review how SIOS defines and uses these terms. Network Communication Terms Crossover cable – A cable used to directly connect computing devices together…
LCD Configuration Data
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Advanced Tasks » LCD » LCD Configuration Data
LCD stores the following related types of data: Dependency Information Resource Status Information Inter-Server Equivalency Information Dependency Information For each defined resource, LifeKeeper maintains a list of dependencies and a list of dependents…
What is “Split Brain” and How to Avoid It
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Before Starting an Evaluation of LifeKeeper for Linux » What is “Split Brain” and How to Avoid It
As we have discussed, in a High Availability cluster environment there is one active node and one or more standby node(s) that will take over service when the active node either fails or stops responding. This sounds like a reasonable assumption until the network…
Running LifeKeeper DataKeeper Recovery Kit With a Firewall
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Maintenance Tasks » Running LifeKeeper DataKeeper Recovery Kit With a Firewall
The LifeKeeper DataKeeper Recovery Kit can work with a firewall in place on the same server if you address the following network access requirements. *Note: If you wish to change or disable your firewall, please follow the procedure recommended by your OS…
DB2 Configuration Requirements
Application Recovery Kits » DB2 Recovery Kit Administration Guide » Configuring the LifeKeeper for Linux DB2 Recovery Kit » Configuration Considerations for DB2 Multiple Partition » DB2 Configuration Requirements
To ensure proper operation of the DB2 Recovery Kit in a multiple partition environment, LifeKeeper requires the following: If you cannot use an additional cluster for your NFS hierarchy, be aware that the LifeKeeper for Linux DB2 Recovery Kit restricts the…
Intergration with VMware HA
LifeKeeper Single Server Protection » LifeKeeper Single Server Protection for Linux Technical Documentation » Intergration with VMware HA
As noted in the Introduction Section, LifeKeeper Single Server Protection is designed for use in both physical and virtual environments. When LifeKeeper SSP is installed in a VMware VM the HA features of VMware can be used in conjunction with LifeKeeper SSP to monitor…
LCD Directory Structure
LifeKeeper for Linux Technical Documentation » LifeKeeper » User Guide » Using LifeKeeper for Linux » Advanced Tasks » LCD » LCD Directory Structure
Major subdirectories under /opt/LifeKeeper: config. LifeKeeper configuration files, including shared equivalencies. bin. LifeKeeper executable programs, such as is_recoverable. See Fault Detection and Recovery Scenarios for descriptions. subsys. Resources…
Client Configuration Considerations for MySQL
Application Recovery Kits » Recovery Kit for MySQL Administration Guide » Recovery Kit for MySQL Configuration » Client Configuration Considerations for MySQL
The following are some configuration considerations for MySQL database clients: If clients will connect from remote hosts, create an IP address under LifeKeeper to be used for client connections. Clients must be configured to connect to the database server…
Logs
LifeKeeper Web Management Console (LKWMC) » LKWMC GUI Operations and Layout » Logs
*This documentation section describes the LifeKeeper Web Management Console (LKWMC). Refer to the LifeKeeper Web Management Console for an overview. Clicking Logs in the left menu will display the LifeKeeper logs for each server in the cluster. The most recent log…
Public Cloud Platforms and their Network Structure Differences
Evaluation Guides » LifeKeeper Evaluation Guide for Cloud Environments » Before Starting an Evaluation of LifeKeeper for Linux » Public Cloud Platforms and their Network Structure Differences
There are several public cloud platforms including Amazon Web Services (AWS), Microsoft Azure and Google Cloud. While there are many similarities in their infrastructures, there are some differences. In many cases a VPC (Virtual Private Cloud) or a VNET (Virtual…