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：
- 使用
Rancher UI - 使用
Longhorn Deployment YAML文件 - 使用
Helm
使用 Rancher UI
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。
使用 Longhorn Deployment YAML 文件
- 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 Helm
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
