Quorum/Witness Common Parameters
The table below lists the Quorum parameters. These values are tuned by editing the /etc/default/LifeKeeper configuration file.
These parameters take effect immediately after they are set.
| Parameter Name | Meaning | Setting Value | Default Value |
|---|---|---|---|
| QUORUM_MODE | Specifies the quorum mode. | majority tcp_remote storage none or off |
majority |
| WITNESS_MODE | Specifies the witness mode. | remote_verify storage none or off |
remote_verify |
| QUORUM_LOSS_ACTION | Specifies the action when quorum is lost. | fastkill fastboot osu |
fastkill |
| ALLOW_EXTEND_WITH_QUORUM_ERROR | If an error or quorum failure occurs in the quorum system, the user has the option to continue the resource extension or stop the operation to address the quorum issue before the resource extension. | true false |
false |
Parameters applied only when tcp_remote is specified for QUORUM_MODE
These parameters take effect immediately after they are set.
| Parameter Name | Meaning | Setting Value | Default Value |
|---|---|---|---|
| QUORUM_HOSTS | Specifies a host and port name combination to be used for determining quorum. The format for entries is “host:port”. When specifying more than one host:port combination, the entries must be comma separated (do not include a space). (Example) QUORUM_HOSTS=myhost:80,router1:443,router2:22 |
String | (not set) |
| QUORUM_TIMEOUT_SECS | The time allowed for tcp/ip witness connections to complete. Connections that don’t complete within this time are treated as failed/unavailable. This only applies when the QUORUM_MODE is tcp_remote. | Integers | 20 |
Parameters applied only when storage is specified for QUORUM_MODE and WITNESS_MODE
Execute qwk_storage_init to take effect these parameters.
| Parameter Name | Meaning | Setting Value | Default Value |
|---|---|---|---|
| QWK_STORAGE_TYPE | Specifies the type of shared storage. Must be specified when QUORUM_MODE is storage. |
block file aws_s3 |
(not set) |
| QWK_STORAGE_HBEATTIME | Specifies the interval in seconds between reading and writing the QWK objects. This value must be greater than or equal to the LCMHBEATTIME setting value. |
An integer between 5 and 10 | 6 |
| QWK_STORAGE_NUMHBEATS | Specifies the number of consecutive heartbeat checks that when reached indicates the target node has failed. A missed heartbeat occurs when the QWK object has not been updated since the last check. | An integer of 3 or more | 4 |
| QWK_STORAGE_OBJECT_<hostname> Note: If the host name contains a “-” or “.”, replace them with an underscore “_” (e.g. lksios-1 → lksios_1). Note: The host name used by LifeKeeper can be checked via the lcduname command. |
Specifies the path to the QWK objects. You must specify paths for all nodes in the cluster. [When QWK_STORAGE_TYPE is block] Specify the device file path. Note: Use WWID (/dev/disk/by-id/) to specify a permanent path. (Example) QWK_STORAGE_OBJECT_nodeA=/dev/disk/by-id/xxxxx QWK_STORAGE_OBJECT_nodeB=/dev/disk/by-id/yyyyy [When QWK_STORAGE_TYPE is file] Specify the regular file path. (Example) QWK_STORAGE_OBJECT_nodeA=/quorum/nodeA QWK_STORAGE_OBJECT_nodeB=/quorum/nodeB [When QWK_STORAGE_TYPE is aws_s3] Specify the S3uri for the Amazon S3 object. Use an S3 object from a different region than the one where LifeKeeper is running. One region is enough, but when specifying 2 regions, make sure to separate them with commas(do not include spaces). (Example 1) QWK_STORAGE_OBJECT_nodeA=s3://bucket1/nodeA,s3://bucket2/nodeA QWK_STORAGE_OBJECT_nodeB=s3://bucket1/nodeB,s3://bucket2/nodeB (Example 2) QWK_STORAGE_OBJECT_nodeA=s3://bucket/quorum/nodeA QWK_STORAGE_OBJECT_nodeB=s3://bucket/quorum/nodeB To access Amazon S3 in another region from an environment without Internet access, or to access Amazon S3-compatible object storage, you need to specify an endpoint and region. In QWK_STORAGE_OBJECT_<hostname>, specify the S3 endpoint after s3uri with +, and then specify the region with +. For example: QWK_STORAGE_OBJECT_nodeA=s3://bucket/quorum/nodeA+https://bucket.vpce-XXXX.vpce.amazonaws.com/+us-east-1 QWK_STORAGE_OBJECT_nodeB=s3://bucket/quorum/nodeB+https://bucket.vpce-XXXX.vpce.amazonaws.com/+us-east-1 Note: NodeA and nodeB must be regular files and not directories. |
String (Maximum length is 256 characters) | (not set) |
| HTTP_PROXY HTTPS_PROXY NO_PROXY |
Set this parameter when accessing AWS CLI via proxy. The value set here will be passed to AWS CLI. See AWS documentation for details. This is a common parameter for Recovery Kit for EC2 and Recovery Kit for Route53. |
String | (not set) |
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