Sync from Host to Virtual

Read more about how syncing works before deciding which resources to sync from the host cluster to the virtual cluster.

vCluster can sync certain resources from the host cluster to make them available inside the virtual cluster, but when these resources are synced, they are only synced in read-only mode. No changes to the resource in the virtual cluster syncs back to the host cluster as the resources are shared across the host cluster.

A good example would be nodes, which are nice to view inside the virtual cluster and can be also used to enabled certain features such as scheduling inside the vCluster, but you wouldn't want your virtual cluster to change the node itself. Another benefit of only syncing from host is that vCluster itself only requires read-only RBAC permissions.

vCluster also allows to sync custom resources via the custom resource definitions syncer

There are a couple of labels that are created on the host cluster by vCluster that never get synced to the virtual cluster resource. These labels are:

• release (Label is needed to avoid conflicts with the vCluster pods themselves). This is only excluded in single-namespace mode as multi-namespace mode does sync all pods into separate namespaces.
• vcluster.loft.sh/namespace
• vcluster.loft.sh/managed-by
• vcluster.loft.sh/controlled-by

Enabled by default

• Events

disabled by default

• CustomResources
• Nodes
• IngressClasses
• StorageClasses
• CSINodes
• CSIDrivers
• CSIStorageCapacities

No bi-directional syncing

Since syncing resources from the host cluster is in read only mode and changes in the virtual cluster do not get applied to the resource in the host cluster, bi-directional syncing does not exist across these resources.

Config reference

fromHost required object pro

Configure what resources vCluster should sync from the host cluster to the virtual cluster.

nodes required object pro

Nodes defines if nodes should get synced from the host cluster to the virtual cluster, but not back.

enabled required boolean false pro

Enabled specifies if syncing real nodes should be enabled. If this is disabled, vCluster will create fake nodes instead.

syncBackChanges required boolean false pro

SyncBackChanges enables syncing labels and taints from the virtual cluster to the host cluster. If this is enabled someone within the virtual cluster will be able to change the labels and taints of the host cluster node.

clearImageStatus required boolean false pro

ClearImageStatus will erase the image status when syncing a node. This allows to hide images that are pulled by the node.

selector required object pro

Selector can be used to define more granular what nodes should get synced from the host cluster to the virtual cluster.

all required boolean false pro

All specifies if all nodes should get synced by vCluster from the host to the virtual cluster or only the ones where pods are assigned to.

labels required object {} pro

Labels are the node labels used to sync nodes from host cluster to virtual cluster. This will also set the node selector when syncing a pod from virtual cluster to host cluster to the same value.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

events required object pro

Events defines if events should get synced from the host cluster to the virtual cluster, but not back.

enabled required boolean true pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

ingressClasses required object pro

IngressClasses defines if ingress classes should get synced from the host cluster to the virtual cluster, but not back.

enabled required boolean false pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

runtimeClasses required object pro

RuntimeClasses defines if runtime classes should get synced from the host cluster to the virtual cluster, but not back.

enabled required boolean false pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

priorityClasses required object pro

PriorityClasses defines if priority classes classes should get synced from the host cluster to the virtual cluster, but not back.

enabled required boolean false pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

storageClasses required object pro

StorageClasses defines if storage classes should get synced from the host cluster to the virtual cluster, but not back. If auto, is automatically enabled when the virtual scheduler is enabled.

enabled required string|boolean auto pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

csiNodes required object pro

CSINodes defines if csi nodes should get synced from the host cluster to the virtual cluster, but not back. If auto, is automatically enabled when the virtual scheduler is enabled.

enabled required string|boolean auto pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

csiDrivers required object pro

CSIDrivers defines if csi drivers should get synced from the host cluster to the virtual cluster, but not back. If auto, is automatically enabled when the virtual scheduler is enabled.

enabled required string|boolean auto pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

csiStorageCapacities required object pro

CSIStorageCapacities defines if csi storage capacities should get synced from the host cluster to the virtual cluster, but not back. If auto, is automatically enabled when the virtual scheduler is enabled.

enabled required string|boolean auto pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

customResources required {key: object} pro

CustomResources defines what custom resources should get synced read-only to the virtual cluster from the host cluster. vCluster will automatically add any required RBAC to the vCluster cluster role.

enabled required boolean pro

Enabled defines if this option should be enabled.

scope required string pro

Scope defines the scope of the resource

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.

volumeSnapshotClasses required object pro

VolumeSnapshotClasses defines if volume snapshot classes created within the virtual cluster should get synced to the host cluster.

enabled required boolean false pro

Enabled defines if this option should be enabled.

patches required object[] pro

Patches patch the resource according to the provided specification.

path required string pro

Path is the path within the patch to target. If the path is not found within the patch, the patch is not applied.

expression required string pro

Expression transforms the value according to the given JavaScript expression.

reverseExpression required string pro

ReverseExpression transforms the value according to the given JavaScript expression.

reference required object pro

Reference treats the path value as a reference to another object and will rewrite it based on the chosen mode automatically. In single-namespace mode this will translate the name to "vxxxxxxxxx" to avoid conflicts with other names, in multi-namespace mode this will not translate the name.

apiVersion required string pro

APIVersion is the apiVersion of the referenced object.

apiVersionPath required string pro

APIVersionPath is optional relative path to use to determine the kind. If APIVersionPath is not found, will fallback to apiVersion.

kind required string pro

Kind is the kind of the referenced object.

kindPath required string pro

KindPath is the optional relative path to use to determine the kind. If KindPath is not found, will fallback to kind.

namePath required string pro

NamePath is the optional relative path to the reference name within the object.

namespacePath required string pro

NamespacePath is the optional relative path to the reference namespace within the object. If omitted or not found, namespacePath equals to the metadata.namespace path of the object.

labels required object pro

Labels treats the path value as a labels selector.