Managing nodes: custom resources

Describes the runtime parameters of the node group.

• metadataobject
  • metadata.namestring

    Pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?$

    Maximum length: 42

• specobject

  Required value

  • spec.chaosobject

    Chaos monkey settings.

    Example:

    mode: DrainAndDelete
    period: 24h
    

    • spec.chaos.modestring

      The chaos monkey mode:

      • DrainAndDelete — drains and deletes a node when triggered;
      • Disabled — leaves this NodeGroup intact.

      Default: "Disabled"

      Allowed values: Disabled, DrainAndDelete

    • spec.chaos.periodstring

      The time interval to use for the chaos monkey (can be specified in the Go format).

      Default: "6h"

      Pattern: ^[0-9]+[mh]{1}$

  • spec.cloudInstancesobject

    Parameter for provisioning the cloud-based VMs.

    Caution! Can only be used together with nodeType: CloudEphemeral.

    • spec.cloudInstances.classReferenceobject

      Required value

      The reference to the InstanceClass object. It is unique for each cloud-provider-* module.

      • spec.cloudInstances.classReference.kindstring

        The object type (e.g., OpenStackInstanceClass). The object type is specified in the documentation of the corresponding cloud-provider- module.

        Allowed values: OpenStackInstanceClass, GCPInstanceClass, VsphereInstanceClass, AWSInstanceClass, YandexInstanceClass, AzureInstanceClass

      • spec.cloudInstances.classReference.namestring

        The name of the required InstanceClass object (e.g., finland-medium).

    • spec.cloudInstances.maxPerZoneinteger

      Required value

      The maximum number of instances for the group in each zone.

      This value is used as the upper bound in cluster-autoscaler.

      Allowed values: 0 <= X

    • spec.cloudInstances.maxSurgePerZoneinteger

      The maximum number of instances to rollout simultaneously in the group in each zone.

      Default: 1

      Allowed values: 0 <= X

    • spec.cloudInstances.maxUnavailablePerZoneinteger

      The maximum number of unavailable instances (during rollout) in the group in each zone.

      Default: 0

      Allowed values: 0 <= X

    • spec.cloudInstances.minPerZoneinteger

      Required value

      The minimum number of instances for the group in each zone.

      This value is used in the MachineDeployment object and as a lower bound in cluster-autoscaler.

      Allowed values: 0 <= X

    • spec.cloudInstances.standbyinteger or string

      The summary number of overprovisioned nodes for this NodeGroup in all zones.

      An overprovisioned node is a cluster node on which resources are reserved that are available at any time for scaling. The presence of such a node allows the cluster autoscaler not to wait for node initialization (which may take several minutes), but to immediately place a load on it.

      The value can be an absolute number (for example, 2) or a percentage of desired nodes (for example, 10%). If a percentage is specified, the absolute number is calculated based on the percentage of the maximum number of nodes (the maxPerZone parameter) rounded down, but not less than one.

      Pattern: ^[0-9]+%?$

    • spec.cloudInstances.standbyHolderobject

      Amount of reserved resources.

      Used to determine whether to order overprovisioned nodes.

      • spec.cloudInstances.standbyHolder.notHeldResourcesobject

        Describes the resources that will not be held (consumed) by the standby holder.

        • spec.cloudInstances.standbyHolder.notHeldResources.cpuinteger or string

          Describes the amount of CPU that will not be held by standby holder on Nodes from this NodeGroup.

          The value can be an absolute number of cpus (for example, 2) as well as a milli representation (for example, 1500m).

          Pattern: ^[0-9]+m?$

        • spec.cloudInstances.standbyHolder.notHeldResources.memoryinteger or string

          Describes the amount of memory that will not be held by standby holder on Nodes from this NodeGroup.

          The value can be an absolute number of bytes (for example, 128974848) as well as a fixed-point number using one of memory suffixes: G, Gi, M, Mi.

          Pattern: ^[0-9]+(\.[0-9]+)?(E|P|T|G|M|K|Ei|Pi|Ti|Gi|Mi|Ki)?$

    • spec.cloudInstances.zonesarray of strings

      List of availability zones to create instances in.

      The default value depends on the cloud provider selected and usually corresponds to all zones of the region being used.

      Example:

      zones:
      - Helsinki
      - Espoo
      - Tampere
      

  • spec.criobject

    Container runtime parameters.

    • spec.cri.containerdobject

      Containerd runtime parameters.

      If used, cri.type must be set to Containerd.

      • spec.cri.containerd.maxConcurrentDownloadsinteger

        Set the max concurrent downloads for each pull.

        Default: 3

    • spec.cri.dockerobject

      Docker settings for nodes.

      • spec.cri.docker.manageboolean

        Enable Docker maintenance from bashible.

        Default: true

      • spec.cri.docker.maxConcurrentDownloadsinteger

        Set the max concurrent downloads for each pull.

        Default: 3

    • spec.cri.notManagedobject

      Settings for not managed CRI for nodes.

      • spec.cri.notManaged.criSocketPathstring

        Path to CRI socket.

    • spec.cri.typestring

      Container runtime type.

      Value defaultCRI from the initial cluster configration (cluster-configuration.yaml parameter from the d8-cluster-configuration secret in the kube-system namespace) is used if not specified.

      Allowed values: Docker, Containerd, NotManaged

  • spec.disruptionsobject

    Disruptions settings for nodes.

    Example:

    disruptions:
      approvalMode: Automatic
      automatic:
        drainBeforeApproval: false
        windows:
        - from: '06:00'
          to: '08:00'
          days:
          - Tue
          - Sun
    

    • spec.disruptions.approvalModestring

      The approval mode for disruptive updates:

      • Manual — disable automatic disruption approval; the alert will be displayed if disruption is needed. Caution! The master node group update mode must be Manual to avoid issues with draining.
      • Automatic — automatically approve disruption-involving updates.
      • RollingUpdate — in this mode, a new node with new settings will be created; then, the old node will be deleted. Available only for cloud nodes.

      If the RollingUpdate mode is not used, when updating, the node is first drained and then updated (rebooted) and put back into operation (uncordoned). Note that in this case, the cluster must have sufficient resources to accommodate the load while the node being updated is unavailable. In the RollingUpdate mode, the node is replaced by the updated node, i.e., an extra node appears in the cluster for the duration of the update. In cloud infrastructures, the RollingUpdate mode is convenient, for example, if there are no resources in the cluster to temporarily host the load from the node being updated.

      Default: "Automatic"

      Allowed values: Manual, Automatic, RollingUpdate

    • spec.disruptions.automaticobject

      Additional parameters for the Automatic mode.

      • spec.disruptions.automatic.drainBeforeApprovalboolean

        Drain Pods from the nodes before approving disruption.

        Caution! This setting ignores (nodes will be approved without draining Pods):

        • for the nodeGroup master with a single node;
        • for a single ready node in a nodeGroup picked out for Deckhouse placement.

        Default: true

      • spec.disruptions.automatic.windowsarray of objects

        Time windows for node disruptive updates.

        • spec.disruptions.automatic.windows.daysarray of strings

          Days of the week when node could be updated.

          Example:

          days:
          - Mon
          - Wed
          

          • Element of the arraystring

            Day of the week.

            Allowed values: Mon, Tue, Wed, Thu, Fri, Sat, Sun

        • spec.disruptions.automatic.windows.fromstring

          Required value

          Start time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          from: '13:00'
          

        • spec.disruptions.automatic.windows.tostring

          Required value

          End time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          to: '18:30'
          

    • spec.disruptions.rollingUpdateobject

      Additional parameters for the RollingUpdate mode.

      • spec.disruptions.rollingUpdate.windowsarray of objects

        Time windows for node disruptive updates.

        • spec.disruptions.rollingUpdate.windows.daysarray of strings

          Days of the week when node could be updated.

          Example:

          days:
          - Mon
          - Wed
          

          • Element of the arraystring

            Day of the week.

            Allowed values: Mon, Tue, Wed, Thu, Fri, Sat, Sun

        • spec.disruptions.rollingUpdate.windows.fromstring

          Required value

          Start time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          from: '13:00'
          

        • spec.disruptions.rollingUpdate.windows.tostring

          Required value

          End time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          to: '18:30'
          

  • spec.kubeletobject

    Kubelet settings for nodes.

    • spec.kubelet.containerLogMaxFilesinteger

      How many rotated log files to store before deleting them.

      WARNING! This parameter does nothing if CRI type is Docker.

      Default: 4

      Allowed values: 1 <= X <= 20

    • spec.kubelet.containerLogMaxSizestring

      Maximum log file size before it is rotated.

      WARNING! This parameter does nothing if CRI type is Docker.

      Default: "50Mi"

      Pattern: \d+[Ei|Pi|Ti|Gi|Mi|Ki|E|P|T|G|M|k|m]

    • spec.kubelet.maxPodsinteger

      Set the max count of pods per node.

      Default: 110

    • spec.kubelet.rootDirstring

      Directory path for managing kubelet files (volume mounts,etc).

      Default: "/var/lib/kubelet"

  • spec.nodeTemplateobject

    Specification of some of the fields that will be maintained in all nodes of the group.

    Example:

    labels:
      environment: production
      app: warp-drive-ai
    annotations:
      ai.fleet.com/discombobulate: "true"
    taints:
    - effect: NoExecute
      key: ship-class
      value: frigate
    

    • spec.nodeTemplate.annotationsobject

      Similar to the standard metadata.annotations field.

      Example:

      annotations:
        ai.fleet.com/discombobulate: "true"
      

    • spec.nodeTemplate.labelsobject

      Similar to the standard metadata.labels field.

      Example:

      labels:
        environment: production
        app: warp-drive-ai
      

    • spec.nodeTemplate.taintsarray of objects

      Similar to the .spec.taints field of the Node object.

      Caution! Only effect, key, value fields are available.

      Example:

      taints:
      - effect: NoExecute
        key: ship-class
        value: frigate
      

      • spec.nodeTemplate.taints.effectstring

        Allowed values: NoSchedule, PreferNoSchedule, NoExecute

      • spec.nodeTemplate.taints.keystring
      • spec.nodeTemplate.taints.valuestring
  • spec.nodeTypestring

    Required value

    The type of nodes this group provides.

    • Cloud — nodes for this group will be automatically created (and deleted) in the cloud of the specified cloud provider;
    • Static — a static node hosted on a bare metal or virtual machine. The cloud-controller-manager does not manage the node even of one of the cloud providers is enabled;
    • Hybrid — a static node (created manually or using any external tools) hosted in the cloud integrated with one of the cloud provider. This node has the CSI running, and it is managed by the cloud-controller-manager: the Node object automatically gets the information about the zone and region based on the cloud data; if a node gets deleted from the cloud, its corresponding Node object will be deleted in Kubernetes.

    Allowed values: Cloud, Static, Hybrid

  • spec.operatingSystemobject

    Operating System settings for nodes.

    • spec.operatingSystem.manageKernelboolean

      Enable kernel maintenance from bashible.

      Default: true

Defines the runtime parameters of a node group.

• metadataobject
  • metadata.namestring

    Pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?$

    Maximum length: 42

• specobject

  Required value

  • spec.chaosobject

    Chaos monkey settings.

    Example:

    mode: DrainAndDelete
    period: 24h
    

    • spec.chaos.modestring

      The chaos monkey mode:

      • DrainAndDelete — drains and deletes a node when triggered;
      • Disabled — leaves this NodeGroup intact.

      Default: "Disabled"

      Allowed values: Disabled, DrainAndDelete

    • spec.chaos.periodstring

      The time interval to use for the chaos monkey (can be specified in the Go format).

      Default: "6h"

      Pattern: ^[0-9]+[mh]{1}$

  • spec.cloudInstancesobject

    Parameter for provisioning the cloud-based VMs.

    Caution! Can only be used together with nodeType: CloudEphemeral.

    • spec.cloudInstances.classReferenceobject

      Required value

      The reference to the InstanceClass object. It is unique for each cloud-provider-* module.

      • spec.cloudInstances.classReference.kindstring

        The object type (e.g., OpenStackInstanceClass). The object type is specified in the documentation of the corresponding cloud-provider- module.

        Allowed values: OpenStackInstanceClass, GCPInstanceClass, VsphereInstanceClass, AWSInstanceClass, YandexInstanceClass, AzureInstanceClass

      • spec.cloudInstances.classReference.namestring

        The name of the required InstanceClass object (e.g., finland-medium).

    • spec.cloudInstances.maxPerZoneinteger

      Required value

      The maximum number of instances for the group in each zone.

      This value is used as the upper bound in cluster-autoscaler.

      Allowed values: 0 <= X

    • spec.cloudInstances.maxSurgePerZoneinteger

      The maximum number of instances to rollout simultaneously in the group in each zone.

      Default: 1

      Allowed values: 0 <= X

    • spec.cloudInstances.maxUnavailablePerZoneinteger

      The maximum number of unavailable instances (during rollout) in the group in each zone.

      Default: 0

      Allowed values: 0 <= X

    • spec.cloudInstances.minPerZoneinteger

      Required value

      The minimum number of instances for the group in each zone.

      This value is used in the MachineDeployment object and as a lower bound in cluster-autoscaler.

      Allowed values: 0 <= X

    • spec.cloudInstances.standbyinteger or string

      The summary number of overprovisioned nodes for this NodeGroup all zones.

      An overprovisioned node is a cluster node on which resources are reserved that are available at any time for scaling. The presence of such a node allows the cluster autoscaler not to wait for node initialization (which may take several minutes), but to immediately place a load on it.

      The value can be an absolute number (for example, 2) or a percentage of desired nodes (for example, 10%). If a percentage is specified, the absolute number is calculated based on the percentage of the maximum number of nodes (the maxPerZone parameter) rounded down, but not less than one.

      Pattern: ^[0-9]+%?$

    • spec.cloudInstances.standbyHolderobject

      Amount of reserved resources.

      Used to determine whether to order overprovisioned nodes.

      • spec.cloudInstances.standbyHolder.notHeldResourcesobject

        Describes the resources that will not be held (consumed) by the standby holder.

        • spec.cloudInstances.standbyHolder.notHeldResources.cpuinteger or string

          Describes the amount of CPU that will not be held by standby holder on Nodes from this NodeGroup.

          The value can be an absolute number of cpus (for example, 2) as well as a milli representation (for example, 1500m).

          Pattern: ^[0-9]+m?$

        • spec.cloudInstances.standbyHolder.notHeldResources.memoryinteger or string

          Describes the amount of memory that will not be held by standby holder on Nodes from this NodeGroup.

          The value can be an absolute number of bytes (for example, 128974848) as well as a fixed-point number using one of memory suffixes: G, Gi, M, Mi.

          Pattern: ^[0-9]+(\.[0-9]+)?(E|P|T|G|M|K|Ei|Pi|Ti|Gi|Mi|Ki)?$

    • spec.cloudInstances.zonesarray of strings

      List of availability zones to create instances in.

      The default value depends on the cloud provider selected and usually corresponds to all zones of the region being used.

      Example:

      zones:
      - Helsinki
      - Espoo
      - Tampere
      

  • spec.criobject

    Container runtime parameters.

    • spec.cri.containerdobject

      Containerd runtime parameters.

      If used, cri.type must be set to Containerd.

      • spec.cri.containerd.maxConcurrentDownloadsinteger

        Set the max concurrent downloads for each pull.

        Default: 3

    • spec.cri.typestring

      Container runtime type.

      Value defaultCRI from the initial cluster configration (cluster-configuration.yaml parameter from the d8-cluster-configuration secret in the kube-system namespace) is used if not specified.

      Allowed values: Docker, Containerd, NotManaged

  • spec.disruptionsobject

    Disruptions settings for nodes.

    Example:

    disruptions:
      approvalMode: Automatic
      automatic:
        drainBeforeApproval: false
        windows:
        - from: '06:00'
          to: '08:00'
          days:
          - Tue
          - Sun
    

    • spec.disruptions.approvalModestring

      The approval mode for disruptive updates:

      • Manual — disable automatic disruption approval; the alert will be displayed if disruption is needed. Caution! The master node group update mode must be Manual to avoid issues with draining.
      • Automatic — automatically approve disruption-involving updates.
      • RollingUpdate — in this mode, a new node with new settings will be created; then, the old node will be deleted. Available only for cloud nodes.

      If the RollingUpdate mode is not used, when updating, the node is first drained and then updated (rebooted) and put back into operation (uncordoned). Note that in this case, the cluster must have sufficient resources to accommodate the load while the node being updated is unavailable. In the RollingUpdate mode, the node is replaced by the updated node, i.e., an extra node appears in the cluster for the duration of the update. In cloud infrastructures, the RollingUpdate mode is convenient, for example, if there are no resources in the cluster to temporarily host the load from the node being updated.

      Default: "Automatic"

      Allowed values: Manual, Automatic, RollingUpdate

    • spec.disruptions.automaticobject

      Additional parameters for the Automatic mode.

      • spec.disruptions.automatic.drainBeforeApprovalboolean

        Drain Pods from the nodes before approving disruption.

        Caution! This setting ignores (nodes will be approved without draining Pods):

        • for the nodeGroup master with a single node;
        • for a single ready node in a nodeGroup picked out for Deckhouse placement.

        Default: true

      • spec.disruptions.automatic.windowsarray of objects

        Time windows for node disruptive updates.

        • spec.disruptions.automatic.windows.daysarray of strings

          Days of the week when node could be updated.

          Example:

          days:
          - Mon
          - Wed
          

          • Element of the arraystring

            Day of the week.

            Allowed values: Mon, Tue, Wed, Thu, Fri, Sat, Sun

        • spec.disruptions.automatic.windows.fromstring

          Required value

          Start time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          from: '13:00'
          

        • spec.disruptions.automatic.windows.tostring

          Required value

          End time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          to: '18:30'
          

    • spec.disruptions.rollingUpdateobject

      Additional parameters for the RollingUpdate mode.

      • spec.disruptions.rollingUpdate.windowsarray of objects

        Time windows for node disruptive updates.

        • spec.disruptions.rollingUpdate.windows.daysarray of strings

          Days of the week when node could be updated.

          Example:

          days:
          - Mon
          - Wed
          

          • Element of the arraystring

            Day of the week.

            Allowed values: Mon, Tue, Wed, Thu, Fri, Sat, Sun

        • spec.disruptions.rollingUpdate.windows.fromstring

          Required value

          Start time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          from: '13:00'
          

        • spec.disruptions.rollingUpdate.windows.tostring

          Required value

          End time of disruptive update window (UTC timezone).

          Pattern: ^(?:\d|[01]\d|2[0-3]):[0-5]\d$

          Example:

          to: '18:30'
          

  • spec.dockerobject

    Docker settings for nodes.

    If used, cri.type must be set to Docker.

    • spec.docker.manageboolean

      Enable Docker maintenance from bashible.

      Default: true

    • spec.docker.maxConcurrentDownloadsinteger

      Set the max concurrent downloads for each pull.

      Default: 3

  • spec.kubeletobject

    Kubelet settings for nodes.

    • spec.kubelet.containerLogMaxFilesinteger

      How many rotated log files to store before deleting them.

      WARNING! This parameter does nothing if CRI type is Docker.

      Default: 4

      Allowed values: 1 <= X <= 20

    • spec.kubelet.containerLogMaxSizestring

      Maximum log file size before it is rotated.

      WARNING! This parameter does nothing if CRI type is Docker.

      Default: "50Mi"

      Pattern: \d+[Ei|Pi|Ti|Gi|Mi|Ki|E|P|T|G|M|k|m]

    • spec.kubelet.maxPodsinteger

      Set the max count of pods per node.

      Default: 110

    • spec.kubelet.rootDirstring

      Directory path for managing kubelet files (volume mounts,etc).

      Default: "/var/lib/kubelet"

  • spec.kubernetesVersionstring

    The desired minor version of Kubernetes.

    By default, it corresponds to the version selected for the cluster globally (see installation documentation) or to the current version of the control plane (if the global version is not defined).

    Allowed values: 1.21, 1.22, 1.23, 1.24, 1.25

    Example:

    kubernetesVersion: '1.21'
    

  • spec.nodeTemplateobject

    Specification of some of the fields that will be maintained in all nodes of the group.

    Example:

    labels:
      environment: production
      app: warp-drive-ai
    annotations:
      ai.fleet.com/discombobulate: "true"
    taints:
    - effect: NoExecute
      key: ship-class
      value: frigate
    

    • spec.nodeTemplate.annotationsobject

      Similar to the standard metadata.annotations field.

      Example:

      annotations:
        ai.fleet.com/discombobulate: "true"
      

    • spec.nodeTemplate.labelsobject

      Similar to the standard metadata.labels field.

      Example:

      labels:
        environment: production
        app: warp-drive-ai
      

    • spec.nodeTemplate.taintsarray of objects

      Similar to the .spec.taints field of the Node object.

      Caution! Only effect, key, value fields are available.

      Example:

      taints:
      - effect: NoExecute
        key: ship-class
        value: frigate
      

      • spec.nodeTemplate.taints.effectstring

        Allowed values: NoSchedule, PreferNoSchedule, NoExecute

      • spec.nodeTemplate.taints.keystring
      • spec.nodeTemplate.taints.valuestring
  • spec.nodeTypestring

    Required value

    The type of nodes this group provides.

    • Cloud — nodes for this group will be automatically created (and deleted) in the cloud of the specified cloud provider;
    • Static — a static node hosted on a bare metal or virtual machine. The cloud-controller-manager does not manage the node even of one of the cloud providers is enabled;
    • Hybrid — a static node (created manually or using any external tools) hosted in the cloud integrated with one of the cloud provider. This node has the CSI running, and it is managed by the cloud-controller-manager: the Node object automatically gets the information about the zone and region based on the cloud data; if a node gets deleted from the cloud, its corresponding Node object will be deleted in Kubernetes.

    Allowed values: Cloud, Static, Hybrid

  • spec.operatingSystemDeprecatedobject

    Operating System settings for nodes.

    • spec.operatingSystem.manageKernelDeprecatedboolean

      Enable kernel maintenance from bashible.

      Default: true

  • spec.staticobject

    Static node parameters

    • spec.static.internalNetworkCIDRsarray of strings

      Subnet CIDR