内容来源于官方 Longhorn 1.1.2 英文技术手册。
您可以在部署 Longhorn 时自定义它的默认设置。例如，您可以在启动 Longhorn 之前指定 Create Default Disk With Node Labeled(创建带有节点标签的默认磁盘) 和 Default Data Path(默认数据路径)。
此默认设置仅适用于尚未部署的 Longhorn 系统。它对现有的 Longhorn 系统没有影响。
任何现有 Longhorn 系统的设置都应使用 Longhorn UI 进行修改。
可以通过以下方式自定义默认设置：
Rancher UILonghorn Deployment YAML 文件Helm在 Rancher 的项目视图中，转到 Apps > Launch > Longhorn 并在启动应用程序之前编辑设置。
下载 longhorn repo:
git clone https://github.com/longhorn/longhorn.git
修改 yaml 文件 longhorn/deploy/longhorn.yaml 中名为 longhorn-default-setting 的 config map。例如：
---
apiVersion: v1
kind: ConfigMap
metadata:
name: longhorn-default-setting
namespace: longhorn-system
data:
default-setting.yaml: |-
backup-target:
backup-target-credential-secret:
allow-recurring-job-while-volume-detached:
create-default-disk-labeled-nodes:
default-data-path:
replica-soft-anti-affinity:
storage-over-provisioning-percentage:
storage-minimal-available-percentage:
upgrade-checker:
default-replica-count:
default-data-locality:
guaranteed-engine-cpu:
default-longhorn-static-storage-class:
backupstore-poll-interval:
taint-toleration:
system-managed-components-node-selector:
priority-class:
auto-salvage:
auto-delete-pod-when-volume-detached-unexpectedly:
disable-scheduling-on-cordoned-node:
replica-zone-soft-anti-affinity:
volume-attachment-recovery-policy:
node-down-pod-deletion-policy:
allow-node-drain-with-last-healthy-replica:
mkfs-ext4-parameters:
disable-replica-rebuild:
replica-replenishment-wait-interval:
disable-revision-counter:
system-managed-pods-image-pull-policy:
allow-volume-creation-with-degraded-availability:
auto-cleanup-system-generated-snapshot:
concurrent-automatic-engine-upgrade-per-node-limit:
backing-image-cleanup-wait-interval:
guaranteed-engine-manager-cpu:
guaranteed-replica-manager-cpu:
---
使用带有 --set 标志的 Helm 命令来修改默认设置。 例如：
helm install longhorn/longhorn --name longhorn --namespace longhorn-system --set defaultSettings.taintToleration="key1=value1:NoSchedule; key2:NoExecute"
您还可以提供一份 values.yaml 文件的副本，其中在运行 Helm 命令时将默认设置修改为 --values 标志：
从 GitHub 获取 values.yaml 文件的副本：
curl -Lo values.yaml https://raw.githubusercontent.com/longhorn/charts/master/charts/longhorn/values.yaml
修改 YAML 文件中的默认设置。以下是 values.yaml 的示例片段：
defaultSettings:
backupTarget: s3://backupbucket@us-east-1/backupstore
backupTargetCredentialSecret: minio-secret
createDefaultDiskLabeledNodes: true
defaultDataPath: /var/lib/longhorn-example/
replicaSoftAntiAffinity: false
storageOverProvisioningPercentage: 600
storageMinimalAvailablePercentage: 15
upgradeChecker: false
defaultReplicaCount: 2
defaultDataLocality: disabled
guaranteedEngineCPU:
defaultLonghornStaticStorageClass: longhorn-static-example
backupstorePollInterval: 500
taintToleration: key1=value1:NoSchedule; key2:NoExecute
systemManagedComponentsNodeSelector: "label-key1:label-value1"
priority-class: high-priority
autoSalvage: false
disableSchedulingOnCordonedNode: false
replicaZoneSoftAntiAffinity: false
volumeAttachmentRecoveryPolicy: never
nodeDownPodDeletionPolicy: do-nothing
mkfsExt4Parameters: -O ^64bit,^metadata_csum
guaranteed-engine-manager-cpu: 15
guaranteed-replica-manager-cpu: 15
使用 values.yaml 运行 Helm：
helm install longhorn/longhorn --name longhorn --namespace longhorn-system --values values.yaml
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Longhorn，企业级云原生容器分布式存储 - 定制默认设置
原文：https://www.cnblogs.com/hacker-linner/p/15195740.html