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Create Cluster Definition

Once the Edge host has been deployed and registered with Palette, it is ready to be assigned to a host cluster. You can add an Edge host to an existing Edge cluster, or you can create a new host cluster for Edge hosts and make the Edge host a member. This applies both to Edge hosts deployed to a physical site and Edge hosts deployed as Virtual Machines (VM).

info

Procedures described on this page apply to Edge hosts with a connection to a Palette instance only. To learn how to create a cluster using an Edge host that does not have a connection to a Palette instance (an air-gapped Edge host), refer to Create Cluster with Local UI.

Select the workflow that best fits your needs.

Create an Edge Native Host Cluster​

Use the following steps to create a new host cluster so that you can add Edge hosts to the node pools.

Limitations​

  • In a multi-node cluster with PXK-E as its Kubernetes layer, you cannot change custom Network Interface Card (NIC). When you add an Edge host to such a cluster, leave the NIC field as its default value.
  • For multi-node clusters, do not use the Local Path Provisioner Pack. This is because whenever a node is drained during an upgrade or for any other reason, the volumes will not dynamically move with the local path provisioner.

Prerequisites​

  • One or more registered Edge host. For more information about Edge host registration, refer to Edge Host Registration.

  • If you are using more than one Edge host to form a cluster, the hosts in the same cluster must be on the same network.

  • One IP address is required for the cluster's Virtual IP (VIP) address .

  • At least one IP address is required for each Edge host.

  • You must ensure that the Edge hosts have stable IP addresses. You have the following options to achieve stable IP addressing for Edge hosts:

    • Use static IP addresses. Contact your network administrator to assign the Edge host a static IP address.

    • Use Dynamic Host Configuration Protocol (DHCP) reservations to reserve an IP address in a DHCP network. Contact your network administrator to reserve IP addresses for your Edge hosts in a DHCP network.

    • Enable network overlay on your Edge cluster. Network overlay can only be enabled during cluster creation. For more information about network overlay, refer to Enable Overlay Network.

      warning

      If any of your Edge hosts have more than one Network Interface Card (NIC), you must either use static IP addresses or use network overlay. DHCP is not supported.

Create Cluster​

  1. Log in to Palette.

  2. Navigate to the left Main Menu and select Clusters.

  3. Click on Add New Cluster.

  4. Choose Edge Native for the cluster type and click Start Edge Native Configuration.

  5. Give the cluster a name, description, and tags. Click on Next.

  6. Select a cluster profile. If you don't have a cluster profile for Edge Native, refer to the Create Edge Native Cluster Profile guide. Click on Next after you have selected a cluster profile.

  7. Review your cluster profile values and make changes as needed. Click on Next.

  8. Provide the host cluster with the Virtual IP (VIP) address used by the physical site. Ensure that this VIP is not in a CIDR range that cannot routed through a proxy. In addition, ensure that this VIP does not overlap with any IP address already used by other hosts in your network, including your Edge hosts.

    You can also select any SSH keys in case you need to remote into the host cluster. You can also provide a list of Network Time Protocol (NTP) servers. Click on Next.

  9. The node configuration page is where you can specify what Edge hosts make up the host cluster. Assign Edge hosts to the control-plane-pool and the worker-pool. When you have completed configuring the node pools, click on Next.

  10. (Optional) When you assign Edge hosts to node pools, you can optionally specify a static IP address for each Edge host. If you want to specify a static IP, toggle on Static IP and provide the following information:

    FieldDescription
    IP addressThe static IP address assigned to your Edge host. This should be unique within your network.
    Default gatewayThe IP address of the default gateway for your cluster network. This gateway routes traffic from your cluster to external networks.
    Subnet maskThe subnet mask of your cluster network. This defines the range of IP addresses within your cluster network.
    DNS serverThe IP address of the DNS server your cluster uses for domain resolution.

    If certain network information is already available, the corresponding fields will be pre-populated.

  11. (Optional) When you assign an Edge host to a node pool, if your Edge host has more than one NIC, you can optionally specify which Network Interface Controller (NIC) the Edge host will use to communicate with the cluster. When you select an Edge host, Palette displays a dropdown of all NICs present on the Edge host.

    If the NIC is configured on the Edge host network, an IP address is displayed next to the name of the NIC. If the NIC is not configured on the Edge host network, you can specify its IP address, default gateway, subnet mask, as well as DNS server to configure it.

    If you choose to change the default NIC used by your nodes in the control plane node pool, you need to make sure all the NICs in the control plane node pool share the same name. You also must make corresponding changes in the Kubernetes layer and the Container Network Interface (CNI) layer.

    In the Kubernetes layer, enter a new parameter cluster.kubevipArgs.vip_interface and set its value to the name of the NIC used by your control plane nodes. For example, if the NIC used by the nodes in your control plane pool is named ens32, add the following two lines.

    cluster:
     kubevipArgs:
       vip_interface: "ens32"

    In the CNI layer, depending on which CNI pack you choose for your cluster profile, you need to make changes in the following locations.

In the Calico pack YAML file default template, uncomment manifests.calico.env.calicoNode.IP_AUTODETECTION_METHOD and set its value to kubernetes-internal-ip. This tells Calico to use the address assigned to the Kubernetes node.

manifests:
    calico:
        ...
        env:
        # Additional env variables for calico-node
        calicoNode:
            #IPV6: "autodetect"
            #FELIX_IPV6SUPPORT: "true"
            #CALICO_IPV6POOL_NAT_OUTGOING: "true"
            #CALICO_IPV4POOL_CIDR: "192.168.0.0/16"
            IP_AUTODETECTION_METHOD: "kubernetes-internal-ip"
warning

After you create the cluster, you will not be able to change the IP address or NIC of your existing Edge hosts unless you remove and re-add them back to the cluster.

  1. The Settings page is where you can configure a patching schedule, security scans, backup settings, and set up Role-Based Access Control (RBAC). Review the settings and make changes if needed. Click on Validate.

  2. Review the settings summary and click on Finish Configuration to deploy the cluster.

    After you create the cluster, the Palette Edge Host agent will start the installation process. You can track the installation progress in Palette. The cluster overview page displays a summary of the progress. Use the Events tab to review detailed logs.

Validate​

  1. Log in to Palette.

  2. Navigate to the left Main Menu and select Clusters.

  3. Select the host cluster you created to view its details page.

  4. Review the Cluster Status. Ensure the Cluster Status field displays Running.

You can also use the command kubectl get nodes to review the status of all nodes in the cluster. Check out the Access Cluster with CLI guide to learn how to use kubectl with a host cluster.

Add an Edge Host to a Host Cluster​

You can add Edge hosts to the node pool of an existing host cluster. Use the following steps to add the Edge host to the node pool.

Limitations​

  • In a multi-node cluster with PXK-E as its Kubernetes layer, you cannot change custom Network Interface Card (NIC). When you add an Edge host to such a cluster, leave the NIC field as its default value.

Prerequisites​

  • An existing Edge cluster.

  • One or more registered Edge host on the same network as your existing cluster. For more information about Edge host registration, refer to Edge Host Registration.

  • You must ensure that the Edge hosts have stable IP addresses. You have the following options to do achieve stable IP addressing for Edge hosts:

    • Use static IP addresses. Contact your network administrator to assign the Edge host a static IP address.
    • Use Dynamic Host Configuration Protocol (DHCP) reservations to reserve an IP address in a DHCP network. Contact your network administrator to reserve IP addresses for your Edge hosts in a DHCP network.
    • Your Edge cluster has enabled network overlay. Network overlay can only be enabled during cluster creation. For more information about network overlay, refer to Enable Overlay Network.
warning

When adding a new Edge host to an existing cluster, ensure you are not creating a scenario where etcd could fail in establishing a quorum. Quorum failures typically result when there is an even number of control plane nodes. To learn more, check out the resource from the etcd documentation titled Why an odd number of cluster members.

Add Edge Host to Node Pool​

  1. Log in to Palette.

  2. Navigate to the left Main Menu and select Clusters.

  3. Use the Cloud Types drop-down Menu and select Edge Native.

  4. Select the host cluster to add the registered Edge host.

  5. Click on the Nodes tab.

  6. Select the node pool to add the Edge host and click the Edit button.

  7. Navigate to the Edge Hosts drop-down Menu and select your Edge host.

  8. (Optional) When you select your Edge host, you can optionally specify a static IP address for the Edge host. If you want to specify a static IP, toggle on Static IP and provide the following information:

    FieldDescription
    IP AddressThe static IP address assigned to your Edge host. This should be unique within your network.
    Default gatewayThe IP address of the default gateway for your cluster network. This gateway routes traffic from your cluster to external networks.
    Subnet maskThe subnet mask of your cluster network. This defines the range of IP addresses within your cluster network.
    DNS serverThe IP address of the DNS server your cluster uses for domain resolution.

    If certain network information is already available, the corresponding fields will be pre-populated.

  9. (Optional) When you assign an Edge host to a node pool, if your Edge host has more than one NIC, you can optionally specify which Network Interface Controller (NIC) the Edge host will use to communicate with the cluster. When you select an Edge host, Palette displays a dropdown of all NICs present on the Edge host.

    If the NIC is configured on the Edge host network, an IP address is displayed next to the name of the NIC. If the NIC is not configured on the Edge host network, you can specify its IP address, default gateway, subnet mask, as well as DNS server to configure it.

    If you choose to change the default NIC used by your nodes, you need to make sure all the NICs in the control plane node pool share the same name. You also must make corresponding changes in the Kubernetes layer and the CNI layer.

    In the Kubernetes layer, enter a new parameter cluster.kubevipArgs.vip_interface and set its value to the name of the NIC used by your control plane nodes. For example, if the NIC used by the nodes in your control plane pool is named ens32, add the following two lines.

    cluster:
     kubevipArgs:
       vip_interface: "ens32"

    In the CNI layer, depending on which CNI pack you choose for your cluster profile, you need to make changes in the following locations.

In the Calico pack YAML file default template, uncomment manifests.calico.env.calicoNode.IP_AUTODETECTION_METHOD and set its value to kubernetes-internal-ip. This tells Calico to use the address assigned to the Kubernetes node.

manifests:
    calico:
        ...
        env:
        # Additional env variables for calico-node
        calicoNode:
            #IPV6: "autodetect"
            #FELIX_IPV6SUPPORT: "true"
            #CALICO_IPV6POOL_NAT_OUTGOING: "true"
            #CALICO_IPV4POOL_CIDR: "192.168.0.0/16"
            IP_AUTODETECTION_METHOD: "kubernetes-internal-ip"
warning

After you add the Edge host to your cluster, you will not be able to change its IP address unless you remove and re-add them back to the cluster.

  1. Confirm your changes.

    The Palette Edge Host agent will start the installation process. You can track the installation progress in Palette. The cluster overview page displays a summary of the progress. Use the Events tab to review detailed logs.

Validate​

  1. Log in to Palette.

  2. Navigate to the left Main Menu and select Clusters.

  3. Select the host cluster you created to view its details page.

  4. Review the Cluster Status. Ensure the Cluster Status field displays Running.

You can also use the command kubectl get nodes to review the status of all nodes in the cluster. Check out the Access Cluster with CLI to learn how to use kubectl with a host cluster.