| Cluster AdministrationThis appendix provides descriptions of HA resource parameters. You can configure the parameters with luci, by using the ccs command, or by editing the etc/cluster/cluster.conf file. Table B.1, "HA Resource Summary" lists the resources, their corresponding resource agents, and references to other tables containing parameter descriptions. To understand resource agents in more detail you can view them in /usr/share/cluster of any cluster node. In addition to the resource agents described in this appendix, the /usr/share/cluster directory includes a dummy OCF script for a resource group, service.sh. For more information about the parameters included in this script, refer to the service.sh script itself. For a more comprehensive list and description of cluster.conf elements and attributes, refer to the cluster schema at /usr/share/cluster/cluster.rng, and the annotated schema at /usr/share/doc/cman-X.Y.ZZ/cluster_conf.html (for example /usr/share/doc/cman-3.0.12/cluster_conf.html). Table B.1. HA Resource Summary | Resource | Resource Agent | Reference to Parameter Description |
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| Apache | apache.sh | Table B.2, "Apache Server" | | Condor Instance | condor.sh | Table B.3, "Condor Instance" | | File System | fs.sh | Table B.4, "Filesystem" | | GFS2 File System | clusterfs.sh | Table B.5, "GFS2" | | IP Address | ip.sh | Table B.6, "IP Address" | | HA LVM | lvm.sh | Table B.7, "HA LVM" | | MySQL | mysql.sh | Table B.8, "MySQL" | | NFS Client | nfsclient.sh | Table B.9, "NFS Client" | | NFS Export | nfsexport.sh | Table B.10, "NFS Export" | | NFS Server | nfsserver.sh | Table B.11, "NFS Server" | | NFS/CIFS Mount | netfs.sh | Table B.12, "NFS/CIFS Mount" | | Open LDAP | openldap.sh | Table B.13, "Open LDAP" | | Oracle 10g/11g Failover Instance | oracledb.sh | Table B.14, "Oracle 10g/11G Failover Instance" | | Oracle 10g Failover Instance | orainstance.sh | Table B.15, "Oracle 10g Failover Instance" | | Oracle 10g Listener | oralistener.sh | Table B.16, "Oracle 10g Listener" | | PostgreSQL 8 | postgres-8.sh | Table B.17, "PostgreSQL 8" | | SAP Database | SAPDatabase | Table B.18, "SAP Database" | | SAP Instance | SAPInstance | Table B.19, "SAP Instance" | | Samba | samba.sh | Table B.20, "Samba Server" | | Script | script.sh | Table B.21, "Script" | | Sybase ASE | ASEHAagent.sh | Table B.22, "Sybase ASE Failover Instance" | | Tomcat 6 | tomcat-6.sh | Table B.23, "Tomcat 6" | | Virtual Machine | vm.sh | Table B.24, "Virtual Machine" NOTE: luci displays this as a virtual service if the host cluster can support virtual machines. |
Table B.2. Apache Server | luci Field | cluster.conf Attribute | Description |
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| Name | name | The name of the Apache Service. | | Server Root | server_root | The default value is /etc/httpd. | | Config File | config_file | Specifies the Apache configuration file. The default valuer is /etc/httpd/conf. | | httpd Options | httpd_options | Other command line options for httpd. | | Shutdown Wait (seconds) | shutdown_wait | Specifies the number of seconds to wait for correct end of service shutdown. |
Table B.3. Condor Instance | Field | luci Field | cluster.conf Attribute |
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| Instance Name | name | Specifies a unique name for the Condor instance. | | Condor Subsystem Type | type | Specifies the type of Condor subsystem for this instance: schedd, job_server, or query_server. |
Table B.4. Filesystem | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a name for the file system resource. | | Filesystem Type | fstype | If not specified, mount tries to determine the file system type. | | Mount Point | mountpoint | Path in file system hierarchy to mount this file system. | | Device, FS Label, or UUID | device | Specifies the device associated with the file system resource. This can be a block device, file system label, or UUID of a file system. | | Mount Options | options | Mount options; that is, options used when the file system is mounted. These may be file-system specific. Refer to the mount(8) man page for supported mount options. | | File System ID (optional) | fsid | File System ID is used only by NFS services.
When creating a new file system resource, you can leave this field blank. Leaving the field blank causes a file system ID to be assigned automatically after you commit the parameter during configuration. If you need to assign a file system ID explicitly, specify it in this field. | | Force Unmount | force_unmount | If enabled, forces the file system to unmount. The default setting is disabled. Force Unmount kills all processes using the mount point to free up the mount when it tries to unmount. | | Force fsck | force_fsck | If enabled, causes fsck to be run on the file system before mounting it. The default setting is disabled. | | Enable NFS daemon and lockd workaround (Red Hat Enterprise Linux 6.4 and later) | nfsrestart | If your filesystem is exported via NFS and occasionally fails to unmount (either during shutdown or service relocation), setting this option will drop all filesystem references prior to the unmount operation. Setting this option requires that you enable the Force unmount option and must not be used together with the NFS Server resource. You should set this option as a last resort only, as this is a hard attempt to unmount a file system. | | Use Quick Status Checks | quick_status | If enabled, performs quick status checks. | | Reboot Host Node if Unmount Fails | self_fence | If enabled, reboots the node if unmounting this file system fails. The filesystem resource agent accepts a value of 1, yes, on, or true to enable this paramater, and a value of 0, no, off, or false to disable it. The default setting is disabled. |
Table B.5. GFS2 | luci Field | cluster.conf Attribute | Description |
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| Name | name | The name of the file system resource. | | Mount Point | mountpoint | The path to which the file system resource is mounted. | | Device, FS Label, or UUID | device | The device file associated with the file system resource. | | Filesystem Type | fstype | Set to GFS2 on luci | | Mount Options | options | Mount options. | | File System ID (optional) | fsid | File System ID is used only by NFS services.
When creating a new GFS2 resource, you can leave this field blank. Leaving the field blank causes a file system ID to be assigned automatically after you commit the parameter during configuration. If you need to assign a file system ID explicitly, specify it in this field. | | Force Unmount | force_unmount | If enabled, forces the file system to unmount. The default setting is disabled. Force Unmount kills all processes using the mount point to free up the mount when it tries to unmount. With GFS2 resources, the mount point is not unmounted at service tear-down unless Force Unmount is enabled. | | Enable NFS daemon and lockd workaround (Red Hat Enterprise Linux 6.4 and later) | nfsrestart | If your filesystem is exported via NFS and occasionally fails to unmount (either during shutdown or service relocation), setting this option will drop all filesystem references prior to the unmount operation. Setting this option requires that you enable the Force unmount option and must not be used together with the NFS Server resource. You should set this option as a last resort only, as this is a hard attempt to unmount a file system. | | Reboot Host Node if Unmount Fails | self_fence | If enabled and unmounting the file system fails, the node will immediately reboot. Generally, this is used in conjunction with force-unmount support, but it is not required. The GFS2 resource agent accepts a value of 1, yes, on, or true to enable this paramater, and a value of 0, no, off, or false to disable it. |
Table B.6. IP Address | luci Field | cluster.conf Attribute | Description |
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| IP Address, Netmask Bits | address | The IP address (and, optionally, netmask bits) for the resource. Netmask bits, or network prefix length, may come after the address itself with a slash as a separator, complying with CIDR notation (for example, 10.1.1.1/8). This is a virtual IP address. IPv4 and IPv6 addresses are supported, as is NIC link monitoring for each IP address. | | Monitor Link | monitor_link | Enabling this causes the status check to fail if the link on the NIC to which this IP address is bound is not present. | | Disable Updates to Static Routes | disable_rdisc | Disable updating of routing using RDISC protocol. | | Number of Seconds to Sleep After Removing an IP Address | sleeptime | Specifies the amount of time (in seconds) to sleep. |
Table B.7. HA LVM | luci Field | cluster.conf Attribute | Description |
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| Name | name | A unique name for this LVM resource. | | Volume Group Name | vg_name | A descriptive name of the volume group being managed. | | Logical Volume Name (optional) | lv_name | Name of the logical volume being managed. This parameter is optional if there is more than one logical volume in the volume group being managed. | | Fence the Node if It is Unable to Clean UP LVM Tags | self_fence | Fence the node if it is unable to clean up LVM tags. The LVM resource agent accepts a value of 1 or yes to enable this paramater, and a value of 0 or no to disable it. |
Table B.8. MySQL | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a name of the MySQL server resource. | | Config File | config_file | Specifies the configuration file. The default value is /etc/my.cnf. | | Listen Address | listen_address | Specifies an IP address for MySQL server. If an IP address is not provided, the first IP address from the service is taken. | | mysqld Options | mysqld_options | Other command line options for httpd. | | Startup Wait (seconds) | startup_wait | Specifies the number of seconds to wait for correct end of service startup. | | Shutdown Wait (seconds) | shutdown_wait | Specifies the number of seconds to wait for correct end of service shutdown. |
Table B.9. NFS Client | luci Field | cluster.conf Attribute | Description |
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| Name | name | This is a symbolic name of a client used to reference it in the resource tree. This is not the same thing as the Target option. | | Target Hostname, Wildcard, or Netgroup | target | This is the server from which you are mounting. It can be specified using a hostname, a wildcard (IP address or hostname based), or a netgroup defining a host or hosts to export to. | | Allow Recovery of This NFS Client | allow_recover | Allow recovery. | | Options | options | Defines a list of options for this client - for example, additional client access rights. For more information, refer to the exports (5) man page, General Options. |
Table B.10. NFS Export | luci Field | cluster.conf Attribute | Description |
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| Name | name | Descriptive name of the resource. The NFS Export resource ensures that NFS daemons are running. It is fully reusable; typically, only one NFS Export resource is needed. Name the NFS Export resource so it is clearly distinguished from other NFS resources. |
Table B.11. NFS Server | luci Field | cluster.conf Attribute | Description |
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| Name | name | Descriptive name of the NFS server resource. The NFS server resource is useful for exporting NFSv4 file systems to clients. Because of the way NFSv4 works, only one NFSv4 resource may exist on a server at a time. Additionally, it is not possible to use the NFS server resource when also using local instances of NFS on each cluster node. |
Table B.12. NFS/CIFS Mount | luci Field | cluster.conf Attribute | Description |
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| Name | name | Symbolic name for the NFS or CIFS mount. This resource is required when a cluster service is configured to be an NFS client. | | Mount Point | mountpoint | Path to which the file system resource is mounted. | | Host | host | NFS/CIFS server IP address or hostname. | | NFS Export Directory Name or CIFS share | export | NFS Export directory name or CIFS share name. | | Filesystem type | fstype | File system type: NFS - Specifies using the default NFS version. This is the default setting.
NFS v4 - Specifies using NFSv4 protocol.
CIFS - Specifies using CIFS protocol.
| | Force Unmount | force_unmount | If Force Unmount is enabled, the cluster kills all processes using this file system when the service is stopped. Killing all processes using the file system frees up the file system. Otherwise, the unmount will fail, and the service will be restarted. | | Do Not Unmount the Filesystem During a Stop of Relocation Operation. | no_unmount | If enabled, specifies that the file system should not be unmounted during a stop or relocation operation. | | Options | options | Mount options. Specifies a list of mount options. If none are specified, the file system is mounted -o sync. |
Table B.13. Open LDAP | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a service name for logging and other purposes. | | Config File | config_file | Specifies an absolute path to a configuration file. The default value is /etc/openldap/slapd.conf. | | URL List | url_list | The default value is ldap:///. | slapd Options | slapd_options | Other command line options for slapd. | | Shutdown Wait (seconds) | shutdown_wait | Specifies the number of seconds to wait for correct end of service shutdown. |
Table B.14. Oracle 10g/11G Failover Instance | luci Field | cluster.conf Attribute | Description |
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| Instance name (SID) of Oracle instance | name | Instance name. | | Oracle User Name | user | This is the user name of the Oracle user that the Oracle AS instance runs as. | | Oracle Application Home Directory | home | This is the Oracle (application, not user) home directory. It is configured when you install Oracle. | | Oracle Installation Type | type | The Oracle installation type. Default: 10g, Database Instance and Listener Only base, Database, Listener, Enterprise Manager, and ISQL*Plus: base-em (or 10g), or Internet Application Server (infrastructure): ias (or 10g-ias). | | Virtual Hostname (optional) | vhost | Virtual Hostname matching the installation hostname of Oracle 10g. Note that during the start/stop of an oracledb resource, your hostname is changed temporarily to this hostname. Therefore, you should configure an oracledb resource as part of an exclusive service only. |
Table B.15. Oracle 10g Failover Instance | luci Field | cluster.conf Attribute | Description |
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| Instance name (SID) of Oracle instance | name | Instance name. | | Oracle User Name | user | This is the user name of the Oracle user that the Oracle instance runs as. | | Oracle Application Home Directory | home | This is the Oracle (application, not user) home directory. It is configured when you install Oracle. | | List of Oracle Listeners (optional, separated by spaces) | listeners | List of Oracle listeners which will be started with the database instance. Listener names are separated by whitespace. Defaults to empty which disables listeners. | | Path to Lock File (optional) | lockfile | Location for lockfile which will be used for checking if the Oracle should be running or not. Defaults to location under /tmp. |
Table B.16. Oracle 10g Listener | luci Field | cluster.conf Attribute | Description |
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| Listener Name | name | Listener name. | | Oracle User Name | user | This is the user name of the Oracle user that the Oracle instance runs as. | | Oracle Application Home Directory | home | This is the Oracle (application, not user) home directory. It is configured when you install Oracle. |
Table B.17. PostgreSQL 8 | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a service name for logging and other purposes. | | Config File | config_file | Define absolute path to configuration file. The default value is /var/lib/pgsql/data/postgresql.conf. | | Postmaster User | postmaster_user | User who runs the database server because it cannot be run by root. The default value is postgres. | | Postmaster Options | postmaster_options | Other command line options for postmaster. | | Shutdown Wait (seconds) | shutdown_wait | Specifies the number of seconds to wait for correct end of service shutdown. |
Table B.18. SAP Database | luci Field | cluster.conf Attribute | Description |
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| SAP Database Name | SID | Specifies a unique SAP system identifier. For example, P01. | | SAP Executable Directory | DIR_EXECUTABLE | Specifies the fully qualified path to sapstartsrv and sapcontrol. | | Database Type | DBTYPE | Specifies one of the following database types: Oracle, DB6, or ADA. | | Oracle Listener Name | NETSERVICENAME | Specifies Oracle TNS listener name. | | ABAP Stack is Not Installed, Only Java Stack is Installed | DBJ2EE_ONLY | If you do not have an ABAP stack installed in the SAP database, enable this parameter. | | Application Level Monitoring | STRICT_MONITORING | Activates application level monitoring. | | Automatic Startup Recovery | AUTOMATIC_RECOVER | Enable or disable automatic startup recovery. | | Path to Java SDK | JAVE_HOME | Path to Java SDK. | | File Name of the JDBC Driver | DB_JARS | File name of the JDBC driver. | | Path to a Pre-Start Script | PRE_START_USEREXIT | Path to a pre-start script. | | Path to a Post-Start Script | POST_START_USEREXIT | Path to a post-start script. | | Path to a Pre-Stop Script | PRE_STOP_USEREXIT | Path to a pre-stop script | | Path to a Post-Stop Script | POST_STOP_USEREXIT | Path to a post-stop script | | J2EE Instance Bootstrap Directory | DIR_BOOTSTRAP | The fully qualified path the J2EE instance bootstrap directory. For example, /usr/sap/P01/J00/j2ee/cluster/bootstrap. | | J2EE Security Store Path | DIR_SECSTORE | The fully qualified path the J2EE security store directory. For example, /usr/sap/P01/SYS/global/security/lib/tools. |
Table B.19. SAP Instance | luci Field | cluster.conf Attribute | Description |
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| SAP Instance Name | InstanceName | The fully qualified SAP instance name. For example, P01_DVEBMGS00_sapp01ci. | | SAP Executable Directory | DIR_EXECUTABLE | The fully qualified path to sapstartsrv and sapcontrol. | | Directory Containing the SAP START Profile | DIR_PROFILE | The fully qualified path to the SAP START profile. | | Name of the SAP START Profile | START_PROFILE | Specifies name of the SAP START profile. | | Number of Seconds to Wait Before Checking Startup Status | START_WAITTIME | Specifies the number of seconds to wait before checking the startup status (do not wait for J2EE-Addin). | | Enable Automatic Startup Recovery | AUTOMATIC_RECOVER | Enable or disable automatic startup recovery. | | Path to a Pre-Start Script | PRE_START_USEREXIT | Path to a pre-start script. | | Path to a Post-Start Script | POST_START_USEREXIT | Path to a post-start script. | | Path to a Pre-Stop Script | PRE_STOP_USEREXIT | Path to a pre-stop script | | Path to a Post-Stop Script | POST_STOP_USEREXIT | Path to a post-stop script |
Regarding Table B.20, "Samba Server", when creating or editing a cluster service, connect a Samba-service resource directly to the service, not to a resource within a service. Table B.20. Samba Server | luci Field | cluster.conf Attribute | Description |
|---|
| Name | name | Specifies the name of the Samba server. | | Config File | config_file | The Samba configuration file | | Other Command-Line Options for smbd | smbd_options | Other command-line options for smbd. | | Other Command-Line Options for nmbd | nmbd_options | Other command-line options for nmbd. | | Shutdown Wait (seconds) | shutdown_wait | Specifies number of seconds to wait for correct end of service shutdown. |
Table B.21. Script | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a name for the custom user script. The script resource allows a standard LSB-compliant init script to be used to start a clustered service. | | Full Path to Script File | file | Enter the path where this custom script is located (for example, /etc/init.d/userscript). |
Table B.22. Sybase ASE Failover Instance | luci Field | cluster.conf Attribute | Description |
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| Instance Name | name | Specifies the instance name of the Sybase ASE resource. | | ASE Server Name | server_name | The ASE server name that is configured for the HA service. | | SYBASE Home directory | sybase_home | The home directory of Sybase products. | | Login File | login_file | The full path of login file that contains the login-password pair. | | Interfaces File | interfaces_file | The full path of the interfaces file that is used to start/access the ASE server. | | SYBASE_ASE Directory Name | sybase_ase | The directory name under sybase_home where ASE products are installed. | | SYBASE_OCS Directory Name | sybase_ocs | The directory name under sybase_home where OCS products are installed. For example, ASE-15_0. | | Sybase User | sybase_user | The user who can run ASE server. | | Start Timeout (seconds) | start_timeout | The start timeout value. | | Shutdown Timeout (seconds) | shutdown_timeout | The shutdown timeout value. | | Deep Probe Timeout | deep_probe_timeout | The maximum seconds to wait for the response of ASE server before determining that the server had no response while running deep probe. |
Table B.23. Tomcat 6 | luci Field | cluster.conf Attribute | Description |
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| Name | name | Specifies a service name for logging and other purposes. | | Config File | config_file | Specifies the absolute path to the configuration file. The default value is /etc/tomcat6/tomcat6.conf. | | Shutdown Wait (seconds) | shutdown_wait | Specifies the number of seconds to wait for correct end of service shutdown. The default value is 30. |
Regarding Table B.24, "Virtual Machine", when you configure your cluster with virtual machine resources, you should use the rgmanager tools to start and stop the virtual machines. Using virsh to start the machine can result in the virtual machine running in more than one place, which can cause data corruption in the virtual machine. For information on configuring your system to reduce the chances of administrators accidentally "double-starting" virtual machines by using both cluster and non-cluster tools, refer to Section 2.14, "Configuring Virtual Machines in a Clustered Environment". Virtual machine resources are configured differently than other cluster resources. To configure a virtual machine resource with luci, add a service group to the cluster then add a resource to the service, selecting Virtual Machine as the resource type and entering the virtual machine resource parameters. For information on configuring a virtual machine with the ccs, refer to Section 5.12, "Virtual Machine Resources". Table B.24. Virtual Machine | luci Field | cluster.conf Attribute | Description |
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| Service Name | name | Specifies the name of the virtual machine. When using the luci interface, you specify this as a service name. | | Automatically Start This Service | autostart | If enabled, this virtual machine is started automatically after the cluster forms a quorum. If this parameter is disabled, this virtual machine is not started automatically after the cluster forms a quorum; the virtual machine is put into the disabled state. | | Run Exclusive | exclusive | If enabled, this virtual machine can only be relocated to run on another node exclusively; that is, to run on a node that has no other virtual machines running on it. If no nodes are available for a virtual machine to run exclusively, the virtual machine is not restarted after a failure. Additionally, other virtual machines do not automatically relocate to a node running this virtual machine as Run exclusive. You can override this option by manual start or relocate operations. | | Failover Domain | domain | Defines lists of cluster members to try in the event that a virtual machine fails. | | Recovery Policy | recovery | Recovery policy provides the following options:
Disable - Disables the virtual machine if it fails.
Relocate - Tries to restart the virtual machine in another node; that is, it does not try to restart in the current node.
Restart - Tries to restart the virtual machine locally (in the current node) before trying to relocate (default) to virtual machine to another node.
Restart-Disable - The service will be restarted in place if it fails. However, if restarting the service fails the service will be disabled instead of moved to another host in the cluster.
| | Restart Options | max_restarts, restart_expire_time | With or selected as the recovery policy for a service, specifies the maximum number of restart failures before relocating or disabling the service and specifies the length of time in seconds after which to forget a restart. | | Migration Type | migrate | Specifies a migration type of live or pause. The default setting is live. | | Migration Mapping | migration_mapping | Specifies an alternate interface for migration. You can specify this when, for example, the network address used for virtual machine migration on a node differs from the address of the node used for cluster communication. Specifying the following indicates that when you migrate a virtual machine from member to member2, you actually migrate to target2. Similarly, when you migrate from member2 to member, you migrate using target. member:target,member2:target2
| | Status Program | status_program | Status program to run in addition to the standard check for the presence of a virtual machine. If specified, the status program is executed once per minute. This allows you to ascertain the status of critical services within a virtual machine. For example, if a virtual machine runs a web server, your status program could check to see whether a web server is up and running; if the status check fails (signified by returning a non-zero value), the virtual machine is recovered. After a virtual machine is started, the virtual machine resource agent will periodically call the status program and wait for a successful return code (zero) prior to returning. This times out after five minutes. | | Path to xmlfile Used to Create the VM | xmlfile | Full path to libvirt XML file containing the libvirt domain definition. | | VM Configuration File Path | path | A colon-delimited path specification that the Virtual Machine Resource Agent (vm.sh) searches for the virtual machine configuration file. For example: /mnt/guests/config:/etc/libvirt/qemu. The path should never directly point to a virtual machine configuration file. | | Path to the VM Snapshot Directory | snapshot | Path to the snapshot directory where the virtual machine image will be stored. | | Hypervisor URI | hypervisor_uri | Hypervisor URI (normally automatic). | | Migration URI | migration_uri | Migration URI (normally automatic). | | Tunnel data over ssh during migration | tunnelled | Tunnel data over ssh during migration. |
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