红帽全球峰会3.4. 为 etcd 设置调优参数
您可以将 control plane 硬件速度设置为 "Standard"、"Slower" 或默认值，即 ""。
默认设置允许系统决定使用哪个速度。这个值允许从此功能不存在的版本进行升级，因为系统可以从之前的版本中选择值。
通过选择其中一个其他值，您要覆盖默认值。如果您看到由于超时或丢失了心跳而导致的很多领导选举机制，且您的系统被设置为 "" 或 "Standard"，请将硬件速度设置为 "Slower"，使系统能够更好地接受增加延迟。
3.4.1. 更改硬件速度容错
要更改 etcd 的硬件速度容错功能，请完成以下步骤。
流程
输入以下命令来查看当前值：
oc describe etcd/cluster | grep "Control Plane Hardware Speed"
$ oc describe etcd/cluster | grep "Control Plane Hardware Speed"Copy to Clipboard Copied! Toggle word wrap Toggle overflow 输出示例
Control Plane Hardware Speed: <VALUE>
Control Plane Hardware Speed: <VALUE>Copy to Clipboard Copied! Toggle word wrap Toggle overflow 注意如果输出为空，则未设置该字段，并且应被视为默认值("")。
输入以下命令来更改值。将
<value>替换为一个有效值：""、"Standard"或"Slower":oc patch etcd/cluster --type=merge -p '{"spec": {"controlPlaneHardwareSpeed": "<value>"}}'$ oc patch etcd/cluster --type=merge -p '{"spec": {"controlPlaneHardwareSpeed": "<value>"}}'Copy to Clipboard Copied! Toggle word wrap Toggle overflow 下表显示了每个配置集的心跳间隔和领导选举超时。这些值可能随时更改。
Expand profile
ETCD_HEARTBEAT_INTERVAL
ETCD_LEADER_ELECTION_TIMEOUT
""根据平台的不同而有所不同
根据平台的不同而有所不同
Standard（标准）100
1000
速度较慢500
2500
查看输出：
输出示例
etcd.operator.openshift.io/cluster patched
etcd.operator.openshift.io/cluster patchedCopy to Clipboard Copied! Toggle word wrap Toggle overflow 如果您输入了有效值之外的任何值，则会显示错误输出。例如，如果您以值形式输入
"Faster"，输出如下：输出示例
The Etcd "cluster" is invalid: spec.controlPlaneHardwareSpeed: Unsupported value: "Faster": supported values: "", "Standard", "Slower"
The Etcd "cluster" is invalid: spec.controlPlaneHardwareSpeed: Unsupported value: "Faster": supported values: "", "Standard", "Slower"Copy to Clipboard Copied! Toggle word wrap Toggle overflow 输入以下命令验证值是否已更改：
oc describe etcd/cluster | grep "Control Plane Hardware Speed"
$ oc describe etcd/cluster | grep "Control Plane Hardware Speed"Copy to Clipboard Copied! Toggle word wrap Toggle overflow 输出示例
Control Plane Hardware Speed: ""
Control Plane Hardware Speed: ""Copy to Clipboard Copied! Toggle word wrap Toggle overflow 等待 etcd pod 推出：
oc get pods -n openshift-etcd -w
$ oc get pods -n openshift-etcd -wCopy to Clipboard Copied! Toggle word wrap Toggle overflow 以下输出显示了 master-0 的预期条目。继续之前，等到所有 master 都显示为
4/4 Running。输出示例
Copy to Clipboard Copied! Toggle word wrap Toggle overflow 输入以下命令查看值：
oc describe -n openshift-etcd pod/<ETCD_PODNAME> | grep -e HEARTBEAT_INTERVAL -e ELECTION_TIMEOUT
$ oc describe -n openshift-etcd pod/<ETCD_PODNAME> | grep -e HEARTBEAT_INTERVAL -e ELECTION_TIMEOUTCopy to Clipboard Copied! Toggle word wrap Toggle overflow 注意这些值可能没有从默认值更改。
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