Chapter 21. Kubernetes NMState 21.1. Observing and updating the node network state and configuration After you install the Kubernetes NMState Operator, you can use the Operator to observe and update your cluster's node network state and network configuration. For more information about how to install the NMState Operator, see Kubernetes NMState Operator . Warning When configuring Virtual Route Forwarding (VRF) users must change their VRFs to a table ID lower than 1000 as higher than 1000 is reserved for OpenShift Container Platform. 21.1.1. Viewing the network state of a node by using the CLI Node network state is the network configuration for all nodes in the cluster. A NodeNetworkState object exists on every node in the cluster. This object is periodically updated and captures the state of the network for that node. Procedure List all the NodeNetworkState objects in the cluster: USD oc get nns Inspect a NodeNetworkState object to view the network on that node. The output in this example has been redacted for clarity: USD oc get nns node01 -o yaml Example output apiVersion: nmstate.io/v1 kind: NodeNetworkState metadata: name: node01 1 status: currentState: 2 dns-resolver: # ... interfaces: # ... route-rules: # ... routes: # ... lastSuccessfulUpdateTime: "2020-01-31T12:14:00Z" 3 1 The name of the NodeNetworkState object is taken from the node. 2 The currentState contains the complete network configuration for the node, including DNS, interfaces, and routes. 3 Timestamp of the last successful update. This is updated periodically as long as the node is reachable and can be used to evalute the freshness of the report. 21.1.2. Viewing the network state of a node (NNS) from the web console As an administrator, you can use the OpenShift Container Platform web console to observe NodeNetworkState resources and network interfaces, and access network details. Procedure Navigate to Networking NodeNetworkState . In the NodeNetworkState page, you can view the list of NodeNetworkState resources and the corresponding interfaces that are created on the nodes. You can use Filter based on Interface state , Interface type , and IP , or the search bar based on criteria Name or Label , to narrow down the displayed NodeNetworkState resources. To access the detailed information about NodeNetworkState resource, click the NodeNetworkState resource name listed in the Name column . To expand and view the Network Details section for the NodeNetworkState resource, click the greater than ( > ) symbol . Alternatively, you can click on each interface type under the Network interface column to view the network details. 21.1.2.1. Viewing a graphical representation of the NNS topology To make the configuration of the node network in the cluster easier to understand, you can view it in the form of a diagram. The NNS topology diagram displays all node components (network interface controllers, bridges, bonds, and VLANs), their properties and configurations, and connections between the nodes. To open the topology view of the cluster, do the following: In the Administrator view of the web console, navigate to Networking NodeNetworkState . In the upper-right corner of the page, click the Topology icon. The NNS topology diagram opens. Each group of components represents a single node. To display the configuration and propertires of a node, click inside the border of the node. To display the features or the YAML file of a specific component (for example, an interface or a bridge), click the icon of the component. The icons of active components have green borders; the icons of disconnected components have red borders. 21.1.3. The NodeNetworkConfigurationPolicy manifest file A NodeNetworkConfigurationPolicy (NNCP) manifest file defines policies that the Kubernetes NMState Operator uses to configure networking for nodes that exist in an OpenShift Container Platform cluster. After you apply a node network policy to a node, the Kubernetes NMState Operator creates an interface on the node. A node network policy includes your requested network configuration and the status of execution for the policy on the cluster as a whole. You can create an NNCP by using either the OpenShift CLI ( oc ) or the OpenShift Container Platform web console. As a postinstallation task you can create an NNCP or edit an existing NNCP. Note Before you create an NNCP, ensure that you read the "Example policy configurations for different interfaces" document. If you want to delete an NNCP, you can use the oc delete nncp command to complete this action. However, this command does not delete any created objects, such as a bridge interface. Deleting the node network policy that added an interface to a node does not change the configuration of the policy on the node. Similarly, removing an interface does not delete the policy, because the Kubernetes NMState Operator recreates the removed interface whenever a pod or a node is restarted. To effectively delete the NNCP, the node network policy, and any created interfaces would typically require the following actions: Edit the NNCP and remove interface details from the file. Ensure that you do not remove name , state , and type parameters from the file. Add state: absent under the interfaces.state section of the NNCP. Run oc apply -f <nncp_file_name> . After the Kubernetes NMState Operator applies the node network policy to each node in your cluster, the interface that was previously created on each node is now marked absent . Run oc delete nncp to delete the NNCP. Additional resources Example policy configurations for different interfaces Removing an interface from nodes 21.1.4. Creating an IP over InfiniBand interface on nodes On the OpenShift Container Platform web console, you can install a Red Hat certified third-party Operator, such as the NVIDIA Network Operator, that supports InfiniBand (IPoIB) mode. Typically, you would use the third-party Operator with other vendor infrastructure to manage resources in an OpenShift Container Platform cluster. To create an IPoIB interface on nodes in your cluster, you must define an InfiniBand (IPoIB) interface in a NodeNetworkConfigurationPolicy (NNCP) manifest file. Important The OpenShift Container Platform documentation describes defining only the IPoIB interface configuration in a NodeNetworkConfigurationPolicy (NNCP) manifest file. You must refer to the NVIDIA and other third-party vendor documentation for the majority of the configuring steps. Red Hat support does not extend to anything external to the NNCP configuration. For more information about the NVIDIA Operator, see Getting Started with Red Hat OpenShift (NVIDIA Docs Hub). Prerequisites You installed a Red Hat certified third-party Operator that supports an IPoIB interface. Procedure Create or edit a NodeNetworkConfigurationPolicy (NNCP) manifest file, and then specify an IPoIB interface in the file. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: worker-0-ipoib spec: # ... interfaces: - description: "" infiniband: mode: datagram 1 pkey: "0xffff" 2 ipv4: address: - ip: 100.125.3.4 prefix-length: 16 dhcp: false enabled: true ipv6: enabled: false name: ibp27s0 state: up type: infiniband 3 # ... 1 datagram is the default mode for an IPoIB interface, and this mode improves optimizes performance and latency. connected mode is a supported mode but consider only using this mode when you need to adjust the maximum transmission unit (MTU) value to improve node connectivity with surrounding network devices. 2 Supports a string or an integer value. The parameter defines the protection key, or P-key , for the interface for the purposes of authentication and encrypted communications with a third-party vendor, such as NVIDIA. Values None and 0xffff indicate the protection key for the base interface in an InfiniBand system. 3 Sets the type of interface to `infiniband `. Apply the NNCP configuration to each node in your cluster by running the following command. The Kubernetes NMState Operator can then create an IPoIB interface on each node. USD oc apply -f <nncp_file_name> 1 1 Replace <nncp_file_name> with the name of your NNCP file. 21.1.5. Managing policy from the web console You can update the node network configuration, such as adding or removing interfaces from nodes, by applying NodeNetworkConfigurationPolicy manifests to the cluster. Manage the policy from the web console by accessing the list of created policies in the NodeNetworkConfigurationPolicy page under the Networking menu. This page enables you to create, update, monitor, and delete the policies. 21.1.5.1. Monitoring the policy status You can monitor the policy status from the NodeNetworkConfigurationPolicy page. This page displays all the policies created in the cluster in a tabular format, with the following columns: Name The name of the policy created. Matched nodes The count of nodes where the policies are applied. This could be either a subset of nodes based on the node selector or all the nodes on the cluster. Node network state The enactment state of the matched nodes. You can click on the enactment state and view detailed information on the status. To find the desired policy, you can filter the list either based on enactment state by using the Filter option, or by using the search option. 21.1.5.2. Creating a policy You can create a policy by using either a form or YAML in the web console. Procedure Navigate to Networking NodeNetworkConfigurationPolicy . In the NodeNetworkConfigurationPolicy page, click Create , and select From Form option. In case there are no existing policies, you can alternatively click Create NodeNetworkConfigurationPolicy to createa policy using form. Note To create policy using YAML, click Create , and select With YAML option. The following steps are applicable to create a policy only by using form. Optional: Check the Apply this NodeNetworkConfigurationPolicy only to specific subsets of nodes using the node selector checkbox to specify the nodes where the policy must be applied. Enter the policy name in the Policy name field. Optional: Enter the description of the policy in the Description field. Optional: In the Policy Interface(s) section, a bridge interface is added by default with preset values in editable fields. Edit the values by executing the following steps: Enter the name of the interface in Interface name field. Select the network state from Network state dropdown. The default selected value is Up . Select the type of interface from Type dropdown. The available values are Bridge , Bonding , and Ethernet . The default selected value is Bridge . Note Addition of a VLAN interface by using the form is not supported. To add a VLAN interface, you must use YAML to create the policy. Once added, you cannot edit the policy by using form. Optional: In the IP configuration section, check IPv4 checkbox to assign an IPv4 address to the interface, and configure the IP address assignment details: Click IP address to configure the interface with a static IP address, or DHCP to auto-assign an IP address. If you have selected IP address option, enter the IPv4 address in IPV4 address field, and enter the prefix length in Prefix length field. If you have selected DHCP option, uncheck the options that you want to disable. The available options are Auto-DNS , Auto-routes , and Auto-gateway . All the options are selected by default. Optional: Enter the port number in Port field. Optional: Check the checkbox Enable STP to enable STP. Optional: To add an interface to the policy, click Add another interface to the policy . Optional: To remove an interface from the policy, click icon to the interface. Note Alternatively, you can click Edit YAML on the top of the page to continue editing the form using YAML. Click Create to complete policy creation. 21.1.6. Updating the policy 21.1.6.1. Updating the policy by using form Procedure Navigate to Networking NodeNetworkConfigurationPolicy . In the NodeNetworkConfigurationPolicy page, click the icon placed to the policy you want to edit, and click Edit . Edit the fields that you want to update. Click Save . Note Addition of a VLAN interface using the form is not supported. To add a VLAN interface, you must use YAML to create the policy. Once added, you cannot edit the policy using form. 21.1.6.2. Updating the policy by using YAML Procedure Navigate to Networking NodeNetworkConfigurationPolicy . In the NodeNetworkConfigurationPolicy page, click the policy name under the Name column for the policy you want to edit. Click the YAML tab, and edit the YAML. Click Save . 21.1.6.3. Deleting the policy Procedure Navigate to Networking NodeNetworkConfigurationPolicy . In the NodeNetworkConfigurationPolicy page, click the icon placed to the policy you want to delete, and click Delete . In the pop-up window, enter the policy name to confirm deletion, and click Delete . 21.1.7. Managing policy by using the CLI 21.1.7.1. Creating an interface on nodes Create an interface on nodes in the cluster by applying a NodeNetworkConfigurationPolicy manifest to the cluster. The manifest details the requested configuration for the interface. By default, the manifest applies to all nodes in the cluster. To add the interface to specific nodes, add the spec: nodeSelector parameter and the appropriate <key>:<value> for your node selector. You can configure multiple nmstate-enabled nodes concurrently. The configuration applies to 50% of the nodes in parallel. This strategy prevents the entire cluster from being unavailable if the network connection fails. To apply the policy configuration in parallel to a specific portion of the cluster, use the maxUnavailable field. Procedure Create the NodeNetworkConfigurationPolicy manifest. The following example configures a Linux bridge on all worker nodes and configures the DNS resolver: apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-policy 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 maxUnavailable: 3 4 desiredState: interfaces: - name: br1 description: Linux bridge with eth1 as a port 5 type: linux-bridge state: up ipv4: dhcp: true enabled: true auto-dns: false bridge: options: stp: enabled: false port: - name: eth1 dns-resolver: 6 config: search: - example.com - example.org server: - 8.8.8.8 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses the node-role.kubernetes.io/worker: "" node selector to select all worker nodes in the cluster. 4 Optional: Specifies the maximum number of nmstate-enabled nodes that the policy configuration can be applied to concurrently. This parameter can be set to either a percentage value (string), for example, "10%" , or an absolute value (number), such as 3 . 5 Optional: Human-readable description for the interface. 6 Optional: Specifies the search and server settings for the DNS server. Create the node network policy: USD oc apply -f br1-eth1-policy.yaml 1 1 File name of the node network configuration policy manifest. Additional resources Example for creating multiple interfaces in the same policy Examples of different IP management methods in policies 21.1.7.2. Confirming node network policy updates on nodes When you apply a node network policy, a NodeNetworkConfigurationEnactment object is created for every node in the cluster. The node network configuration enactment is a read-only object that represents the status of execution of the policy on that node. If the policy fails to be applied on the node, the enactment for that node includes a traceback for troubleshooting. Procedure To confirm that a policy has been applied to the cluster, list the policies and their status: USD oc get nncp Optional: If a policy is taking longer than expected to successfully configure, you can inspect the requested state and status conditions of a particular policy: USD oc get nncp <policy> -o yaml Optional: If a policy is taking longer than expected to successfully configure on all nodes, you can list the status of the enactments on the cluster: USD oc get nnce Optional: To view the configuration of a particular enactment, including any error reporting for a failed configuration: USD oc get nnce <node>.<policy> -o yaml 21.1.7.3. Removing an interface from nodes You can remove an interface from one or more nodes in the cluster by editing the NodeNetworkConfigurationPolicy object and setting the state of the interface to absent . Removing an interface from a node does not automatically restore the node network configuration to a state. If you want to restore the state, you will need to define that node network configuration in the policy. If you remove a bridge or bonding interface, any node NICs in the cluster that were previously attached or subordinate to that bridge or bonding interface are placed in a down state and become unreachable. To avoid losing connectivity, configure the node NIC in the same policy so that it has a status of up and either DHCP or a static IP address. Note Deleting the node network policy that added an interface does not change the configuration of the policy on the node. Although a NodeNetworkConfigurationPolicy is an object in the cluster, the object only represents the requested configuration. Similarly, removing an interface does not delete the policy. Procedure Update the NodeNetworkConfigurationPolicy manifest used to create the interface. The following example removes a Linux bridge and configures the eth1 NIC with DHCP to avoid losing connectivity: apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: <br1-eth1-policy> 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 desiredState: interfaces: - name: br1 type: linux-bridge state: absent 4 - name: eth1 5 type: ethernet 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses the node-role.kubernetes.io/worker: "" node selector to select all worker nodes in the cluster. 4 Changing the state to absent removes the interface. 5 The name of the interface that is to be unattached from the bridge interface. 6 The type of interface. This example creates an Ethernet networking interface. 7 The requested state for the interface. 8 Optional: If you do not use dhcp , you can either set a static IP or leave the interface without an IP address. 9 Enables ipv4 in this example. Update the policy on the node and remove the interface: USD oc apply -f <br1-eth1-policy.yaml> 1 1 File name of the policy manifest. 21.1.8. Example policy configurations for different interfaces Before you read the different example NodeNetworkConfigurationPolicy (NNCP) manifest configurations, consider the following factors when you apply a policy to nodes so that your cluster runs under its best performance conditions: When you need to apply a policy to more than one node, create a NodeNetworkConfigurationPolicy manifest for each target node. The Kubernetes NMState Operator applies the policy to each node with a defined NNCP in an unspecified order. Scoping a policy with this approach reduces the length of time for policy application but risks a cluster-wide outage if an error exists in the cluster's configuration. To avoid this type of error, initially apply an NNCP to some nodes, confirm the NNCP is configured correctly for these nodes, and then proceed with applying the policy to the remaining nodes. When you need to apply a policy to many nodes but you only want to create a single NNCP for all the nodes, the Kubernetes NMState Operator applies the policy to each node in sequence. You can set the speed and coverage of policy application for target nodes with the maxUnavailable parameter in the cluster's configuration file. By setting a lower percentage value for the parameter, you can reduce the risk of a cluster-wide outage if the outage impacts the small percentage of nodes that are receiving the policy application. Consider specifying all related network configurations in a single policy. When a node restarts, the Kubernetes NMState Operator cannot control the order to which it applies policies to nodes. The Kubernetes NMState Operator might apply interdependent policies in a sequence that results in a degraded network object. 21.1.8.1. Example: Linux bridge interface node network configuration policy Create a Linux bridge interface on nodes in the cluster by applying a NodeNetworkConfigurationPolicy manifest to the cluster. The following YAML file is an example of a manifest for a Linux bridge interface. It includes samples values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: br1 4 description: Linux bridge with eth1 as a port 5 type: linux-bridge 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 bridge: options: stp: enabled: false 10 port: - name: eth1 11 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses a hostname node selector. 4 Name of the interface. 5 Optional: Human-readable description of the interface. 6 The type of interface. This example creates a bridge. 7 The requested state for the interface after creation. 8 Optional: If you do not use dhcp , you can either set a static IP or leave the interface without an IP address. 9 Enables ipv4 in this example. 10 Disables stp in this example. 11 The node NIC to which the bridge attaches. 21.1.8.2. Example: VLAN interface node network configuration policy Create a VLAN interface on nodes in the cluster by applying a NodeNetworkConfigurationPolicy manifest to the cluster. Note Define all related configurations for the VLAN interface of a node in a single NodeNetworkConfigurationPolicy manifest. For example, define the VLAN interface for a node and the related routes for the VLAN interface in the same NodeNetworkConfigurationPolicy manifest. When a node restarts, the Kubernetes NMState Operator cannot control the order in which policies are applied. Therefore, if you use separate policies for related network configurations, the Kubernetes NMState Operator might apply these policies in a sequence that results in a degraded network object. The following YAML file is an example of a manifest for a VLAN interface. It includes samples values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: vlan-eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: eth1.102 4 description: VLAN using eth1 5 type: vlan 6 state: up 7 vlan: base-iface: eth1 8 id: 102 9 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses a hostname node selector. 4 Name of the interface. When deploying on bare metal, only the <interface_name>.<vlan_number> VLAN format is supported. 5 Optional: Human-readable description of the interface. 6 The type of interface. This example creates a VLAN. 7 The requested state for the interface after creation. 8 The node NIC to which the VLAN is attached. 9 The VLAN tag. 21.1.8.3. Example: Node network configuration policy for virtual functions Update host network settings for Single Root I/O Virtualization (SR-IOV) network virtual functions (VF) in an existing cluster by applying a NodeNetworkConfigurationPolicy manifest. You can apply a NodeNetworkConfigurationPolicy manifest to an existing cluster to complete the following tasks: Configure QoS host network settings for VFs to optimize performance. Add, remove, or update VFs for a network interface. Manage VF bonding configurations. Note To update host network settings for SR-IOV VFs by using NMState on physical functions that are also managed through the SR-IOV Network Operator, you must set the externallyManaged parameter in the relevant SriovNetworkNodePolicy resource to true . For more information, see the Additional resources section. The following YAML file is an example of a manifest that defines QoS policies for a VF. This YAML includes samples values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: qos 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 desiredState: interfaces: - name: ens1f0 4 description: Change QOS on VF0 5 type: ethernet 6 state: up 7 ethernet: sr-iov: total-vfs: 3 8 vfs: - id: 0 9 max-tx-rate: 200 10 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example applies to all nodes with the worker role. 4 Name of the physical function (PF) network interface. 5 Optional: Human-readable description of the interface. 6 The type of interface. 7 The requested state for the interface after configuration. 8 The total number of VFs. 9 Identifies the VF with an ID of 0 . 10 Sets a maximum transmission rate, in Mbps, for the VF. This sample value sets a rate of 200 Mbps. The following YAML file is an example of a manifest that adds a VF for a network interface. In this sample configuration, the ens1f1v0 VF is created on the ens1f1 physical interface, and this VF is added to a bonded network interface bond0 . The bond uses active-backup mode for redundancy. In this example, the VF is configured to use hardware offloading to manage the VLAN directly on the physical interface. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: addvf 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 maxUnavailable: 3 desiredState: interfaces: - name: ens1f1 4 type: ethernet state: up ethernet: sr-iov: total-vfs: 1 5 vfs: - id: 0 trust: true 6 vlan-id: 477 7 - name: bond0 8 description: Attach VFs to bond 9 type: bond 10 state: up 11 link-aggregation: mode: active-backup 12 options: primary: ens1f0v0 13 port: 14 - ens1f0v0 - ens1f1v0 15 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 The example applies to all nodes with the worker role. 4 Name of the VF network interface. 5 Number of VFs to create. 6 Setting to allow failover bonding between the active and backup VFs. 7 ID of the VLAN. The example uses hardward offloading to define a VLAN directly on the VF. 8 Name of the bonding network interface. 9 Optional: Human-readable description of the interface. 10 The type of interface. 11 The requested state for the interface after configuration. 12 The bonding policy for the bond. 13 The primary attached bonding port. 14 The ports for the bonded network interface. 15 In this example, the VLAN network interface is added as an additional interface to the bonded network interface. Additional resources Configuring an SR-IOV network device Configuring hardware offloading 21.1.8.4. Example: Bond interface node network configuration policy Create a bond interface on nodes in the cluster by applying a NodeNetworkConfigurationPolicy manifest to the cluster. Note OpenShift Container Platform only supports the following bond modes: mode=1 active-backup mode=2 balance-xor mode=4 802.3ad Other bond modes are not supported. The following YAML file is an example of a manifest for a bond interface. It includes samples values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: bond0-eth1-eth2-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: bond0 4 description: Bond with ports eth1 and eth2 5 type: bond 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 link-aggregation: mode: active-backup 10 options: miimon: '140' 11 port: 12 - eth1 - eth2 mtu: 1450 13 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses a hostname node selector. 4 Name of the interface. 5 Optional: Human-readable description of the interface. 6 The type of interface. This example creates a bond. 7 The requested state for the interface after creation. 8 Optional: If you do not use dhcp , you can either set a static IP or leave the interface without an IP address. 9 Enables ipv4 in this example. 10 The driver mode for the bond. This example uses an active backup mode. 11 Optional: This example uses miimon to inspect the bond link every 140ms. 12 The subordinate node NICs in the bond. 13 Optional: The maximum transmission unit (MTU) for the bond. If not specified, this value is set to 1500 by default. 21.1.8.5. Example: Ethernet interface node network configuration policy Configure an Ethernet interface on nodes in the cluster by applying a NodeNetworkConfigurationPolicy manifest to the cluster. The following YAML file is an example of a manifest for an Ethernet interface. It includes sample values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: eth1 4 description: Configuring eth1 on node01 5 type: ethernet 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses a hostname node selector. 4 Name of the interface. 5 Optional: Human-readable description of the interface. 6 The type of interface. This example creates an Ethernet networking interface. 7 The requested state for the interface after creation. 8 Optional: If you do not use dhcp , you can either set a static IP or leave the interface without an IP address. 9 Enables ipv4 in this example. 21.1.8.6. Example: Multiple interfaces in the same node network configuration policy You can create multiple interfaces in the same node network configuration policy. These interfaces can reference each other, allowing you to build and deploy a network configuration by using a single policy manifest. The following example YAML file creates a bond that is named bond10 across two NICs and VLAN that is named bond10.103 that connects to the bond. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: bond-vlan 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: bond10 4 description: Bonding eth2 and eth3 5 type: bond 6 state: up 7 link-aggregation: mode: balance-xor 8 options: miimon: '140' 9 port: 10 - eth2 - eth3 - name: bond10.103 11 description: vlan using bond10 12 type: vlan 13 state: up 14 vlan: base-iface: bond10 15 id: 103 16 ipv4: dhcp: true 17 enabled: true 18 1 Name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. 3 This example uses hostname node selector. 4 11 Name of the interface. 5 12 Optional: Human-readable description of the interface. 6 13 The type of interface. 7 14 The requested state for the interface after creation. 8 The driver mode for the bond. 9 Optional: This example uses miimon to inspect the bond link every 140ms. 10 The subordinate node NICs in the bond. 15 The node NIC to which the VLAN is attached. 16 The VLAN tag. 17 Optional: If you do not use dhcp, you can either set a static IP or leave the interface without an IP address. 18 Enables ipv4 in this example. 21.1.8.7. Example: Network interface with a VRF instance node network configuration policy Associate a Virtual Routing and Forwarding (VRF) instance with a network interface by applying a NodeNetworkConfigurationPolicy custom resource (CR). Important Associating a VRF instance with a network interface is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope . By associating a VRF instance with a network interface, you can support traffic isolation, independent routing decisions, and the logical separation of network resources. In a bare-metal environment, you can announce load balancer services through interfaces belonging to a VRF instance by using MetalLB. For more information, see the Additional resources section. The following YAML file is an example of associating a VRF instance to a network interface. It includes samples values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: vrfpolicy 1 spec: nodeSelector: vrf: "true" 2 maxUnavailable: 3 desiredState: interfaces: - name: ens4vrf 3 type: vrf 4 state: up vrf: port: - ens4 5 route-table-id: 2 6 1 The name of the policy. 2 This example applies the policy to all nodes with the label vrf:true . 3 The name of the interface. 4 The type of interface. This example creates a VRF instance. 5 The node interface to which the VRF attaches. 6 The name of the route table ID for the VRF. Additional resources About virtual routing and forwarding Exposing a service through a network VRF 21.1.9. Capturing the static IP of a NIC attached to a bridge Important Capturing the static IP of a NIC is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope . 21.1.9.1. Example: Linux bridge interface node network configuration policy to inherit static IP address from the NIC attached to the bridge Create a Linux bridge interface on nodes in the cluster and transfer the static IP configuration of the NIC to the bridge by applying a single NodeNetworkConfigurationPolicy manifest to the cluster. The following YAML file is an example of a manifest for a Linux bridge interface. It includes sample values that you must replace with your own information. apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-copy-ipv4-policy 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" capture: eth1-nic: interfaces.name=="eth1" 3 eth1-routes: routes.running.-hop-interface=="eth1" br1-routes: capture.eth1-routes | routes.running.-hop-interface := "br1" desiredState: interfaces: - name: br1 description: Linux bridge with eth1 as a port type: linux-bridge 4 state: up ipv4: "{{ capture.eth1-nic.interfaces.0.ipv4 }}" 5 bridge: options: stp: enabled: false port: - name: eth1 6 routes: config: "{{ capture.br1-routes.routes.running }}" 1 The name of the policy. 2 Optional: If you do not include the nodeSelector parameter, the policy applies to all nodes in the cluster. This example uses the node-role.kubernetes.io/worker: "" node selector to select all worker nodes in the cluster. 3 The reference to the node NIC to which the bridge attaches. 4 The type of interface. This example creates a bridge. 5 The IP address of the bridge interface. This value matches the IP address of the NIC which is referenced by the spec.capture.eth1-nic entry. 6 The node NIC to which the bridge attaches. Additional resources The NMPolicy project - Policy syntax 21.1.10. Examples: IP management The following example configuration snippets show different methods of IP management. These examples use the ethernet interface type to simplify the example while showing the related context in the policy configuration. These IP management examples can be used with the other interface types. 21.1.10.1. Static The following snippet statically configures an IP address on the Ethernet interface: # ... interfaces: - name: eth1 description: static IP on eth1 type: ethernet state: up ipv4: dhcp: false address: - ip: 192.168.122.250 1 prefix-length: 24 enabled: true # ... 1 Replace this value with the static IP address for the interface. 21.1.10.2. No IP address The following snippet ensures that the interface has no IP address: # ... interfaces: - name: eth1 description: No IP on eth1 type: ethernet state: up ipv4: enabled: false # ... Important Always set the state parameter to up when you set both the ipv4.enabled and the ipv6.enabled parameter to false to disable an interface. If you set state: down with this configuration, the interface receives a DHCP IP address because of automatic DHCP assignment. 21.1.10.3. Dynamic host configuration The following snippet configures an Ethernet interface that uses a dynamic IP address, gateway address, and DNS: # ... interfaces: - name: eth1 description: DHCP on eth1 type: ethernet state: up ipv4: dhcp: true enabled: true # ... The following snippet configures an Ethernet interface that uses a dynamic IP address but does not use a dynamic gateway address or DNS: # ... interfaces: - name: eth1 description: DHCP without gateway or DNS on eth1 type: ethernet state: up ipv4: dhcp: true auto-gateway: false auto-dns: false enabled: true # ... 21.1.10.4. DNS By default, the nmstate API stores DNS values globally as against storing them in a network interface. For certain situations, you must configure a network interface to store DNS values. Tip Setting a DNS configuration is comparable to modifying the /etc/resolv.conf file. To define a DNS configuration for a network interface, you must initially specify the dns-resolver section in the network interface's YAML configuration file. To apply an NNCP configuration to your network interface, you need to run the oc apply -f <nncp_file_name> command. Important You cannot use the br-ex bridge, an OVN-Kubernetes-managed Open vSwitch bridge, as the interface when configuring DNS resolvers unless you manually configured a customized br-ex bridge. For more information, see "Creating a manifest object that includes a customized br-ex bridge" in the Deploying installer-provisioned clusters on bare metal document or the Installing a user-provisioned cluster on bare metal document. The following example shows a default situation that stores DNS values globally: Configure a static DNS without a network interface. Note that when updating the /etc/resolv.conf file on a host node, you do not need to specify an interface, IPv4 or IPv6, in the NodeNetworkConfigurationPolicy (NNCP) manifest. Example of a DNS configuration for a network interface that globally stores DNS values apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: worker-0-dns-testing spec: nodeSelector: kubernetes.io/hostname: <target_node> desiredState: dns-resolver: config: search: - example.com - example.org server: - 2001:db8:f::1 - 192.0.2.251 # ... Important You can specify DNS options under the dns-resolver.config section of your NNCP file as demonstrated in the following example: # ... desiredState: dns-resolver: config: search: options: - timeout:2 - attempts:3 # ... If you want to remove the DNS options from your network interface, apply the following configuration to your NNCP and then run the oc apply -f <nncp_file_name> command: # ... dns-resolver: config: {} interfaces: [] # ... The following examples show situations that require configuring a network interface to store DNS values: If you want to rank a static DNS name server over a dynamic DNS name server, define the interface that runs either the Dynamic Host Configuration Protocol (DHCP) or the IPv6 Autoconfiguration ( autoconf ) mechanism in the network interface YAML configuration file. Example configuration that adds 192.0.2.1 to DNS name servers retrieved from the DHCPv4 network protocol # ... dns-resolver: config: server: - 192.0.2.1 interfaces: - name: eth1 type: ethernet state: up ipv4: enabled: true dhcp: true auto-dns: true # ... If you need to configure a network interface to store DNS values instead of adopting the default method, which uses the nmstate API to store DNS values globally, you can set static DNS values and static IP addresses in the network interface YAML file. Important Storing DNS values at the network interface level might cause name resolution issues after you attach the interface to network components, such as an Open vSwitch (OVS) bridge, a Linux bridge, or a bond. Example configuration that stores DNS values at the interface level # ... dns-resolver: config: search: - example.com - example.org server: - 2001:db8:1::d1 - 2001:db8:1::d2 - 192.0.2.1 interfaces: - name: eth1 type: ethernet state: up ipv4: address: - ip: 192.0.2.251 prefix-length: 24 dhcp: false enabled: true ipv6: address: - ip: 2001:db8:1::1 prefix-length: 64 dhcp: false enabled: true autoconf: false # ... If you want to set static DNS search domains and dynamic DNS name servers for your network interface, define the dynamic interface that runs either the Dynamic Host Configuration Protocol (DHCP) or the IPv6 Autoconfiguration ( autoconf ) mechanism in the network interface YAML configuration file. Example configuration that sets example.com and example.org static DNS search domains along with dynamic DNS name server settings # ... dns-resolver: config: search: - example.com - example.org server: [] interfaces: - name: eth1 type: ethernet state: up ipv4: enabled: true dhcp: true auto-dns: true ipv6: enabled: true dhcp: true autoconf: true auto-dns: true # ... 21.1.10.5. Static routing The following snippet configures a static route and a static IP on interface eth1 . dns-resolver: config: # ... interfaces: - name: eth1 description: Static routing on eth1 type: ethernet state: up ipv4: dhcp: false enabled: true address: - ip: 192.0.2.251 1 prefix-length: 24 routes: config: - destination: 198.51.100.0/24 metric: 150 -hop-address: 192.0.2.1 2 -hop-interface: eth1 table-id: 254 # ... 1 The static IP address for the Ethernet interface. 2 The hop address for the node traffic. This must be in the same subnet as the IP address set for the Ethernet interface. Important You cannot use the OVN-Kubernetes br-ex bridge as the hop interface when configuring a static route unless you manually configured a customized br-ex bridge. For more information, see "Creating a manifest object that includes a customized br-ex bridge" in the Deploying installer-provisioned clusters on bare metal document or the Installing a user-provisioned cluster on bare metal document. Additional resources Creating a manifest object that includes a customized br-ex bridge (Installer-provisioned infrastructure) Creating a manifest object that includes a customized br-ex bridge (User-provisioned infrastructure) 21.2. Troubleshooting node network configuration If the node network configuration encounters an issue, the policy is automatically rolled back and the enactments report failure. This includes issues such as: The configuration fails to be applied on the host. The host loses connection to the default gateway. The host loses connection to the API server. 21.2.1. Troubleshooting an incorrect node network configuration policy configuration You can apply changes to the node network configuration across your entire cluster by applying a node network configuration policy. If you applied an incorrect configuration, you can use the following example to troubleshoot and correct the failed node network policy. The example attempts to apply a Linux bridge policy to a cluster that has three control plane nodes and three compute nodes. The policy is not applied because the policy references the wrong interface. To find an error, you need to investigate the available NMState resources. You can then update the policy with the correct configuration. Prerequisites You ensured that an ens01 interface does not exist on your Linux system. Procedure Create a policy on your cluster. The following example creates a simple bridge, br1 that has ens01 as its member: apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: ens01-bridge-testfail spec: desiredState: interfaces: - name: br1 description: Linux bridge with the wrong port type: linux-bridge state: up ipv4: dhcp: true enabled: true bridge: options: stp: enabled: false port: - name: ens01 # ... Apply the policy to your network interface: USD oc apply -f ens01-bridge-testfail.yaml Example output nodenetworkconfigurationpolicy.nmstate.io/ens01-bridge-testfail created Verify the status of the policy by running the following command: USD oc get nncp The output shows that the policy failed: Example output NAME STATUS ens01-bridge-testfail FailedToConfigure The policy status alone does not indicate if it failed on all nodes or a subset of nodes. List the node network configuration enactments to see if the policy was successful on any of the nodes. If the policy failed for only a subset of nodes, the output suggests that the problem is with a specific node configuration. If the policy failed on all nodes, the output suggests that the problem is with the policy. USD oc get nnce The output shows that the policy failed on all nodes: Example output NAME STATUS control-plane-1.ens01-bridge-testfail FailedToConfigure control-plane-2.ens01-bridge-testfail FailedToConfigure control-plane-3.ens01-bridge-testfail FailedToConfigure compute-1.ens01-bridge-testfail FailedToConfigure compute-2.ens01-bridge-testfail FailedToConfigure compute-3.ens01-bridge-testfail FailedToConfigure View one of the failed enactments. The following command uses the output tool jsonpath to filter the output: USD oc get nnce compute-1.ens01-bridge-testfail -o jsonpath='{.status.conditions[?(@.type=="Failing")].message}' Example output [2024-10-10T08:40:46Z INFO nmstatectl] Nmstate version: 2.2.37 NmstateError: InvalidArgument: Controller interface br1 is holding unknown port ens01 The example shows the output from an InvalidArgument error that indicates that the ens01 is an unknown port. For this example, you might need to change the port configuration in the policy configuration file. To ensure that the policy is configured properly, view the network configuration for one or all of the nodes by requesting the NodeNetworkState object. The following command returns the network configuration for the control-plane-1 node: The output shows that the interface name on the nodes is ens1 but the failed policy incorrectly uses ens01 : Example output - ipv4: # ... name: ens1 state: up type: ethernet Correct the error by editing the existing policy: USD oc edit nncp ens01-bridge-testfail # ... port: - name: ens1 Save the policy to apply the correction. Check the status of the policy to ensure it updated successfully: USD oc get nncp Example output NAME STATUS ens01-bridge-testfail SuccessfullyConfigured The updated policy is successfully configured on all nodes in the cluster. 21.2.2. Troubleshooting DNS connectivity issues in a disconnected environment If you experience DNS connectivity issues when configuring nmstate in a disconnected environment, you can configure the DNS server to resolve the list of name servers for the domain root-servers.net . Important Ensure that the DNS server includes a name server (NS) entry for the root-servers.net zone. The DNS server does not need to forward a query to an upstream resolver, but the server must return a correct answer for the NS query. 21.2.2.1. Configuring the bind9 DNS named server For a cluster configured to query a bind9 DNS server, you can add the root-servers.net zone to a configuration file that contains at least one NS record. For example you can use the /var/named/named.localhost as a zone file that already matches this criteria. Procedure Add the root-servers.net zone at the end of the /etc/named.conf configuration file by running the following command: USD cat >> /etc/named.conf <<EOF zone "root-servers.net" IN { type master; file "named.localhost"; }; EOF Restart the named service by running the following command: USD systemctl restart named Confirm that the root-servers.net zone is present by running the following command: USD journalctl -u named|grep root-servers.net Example output Jul 03 15:16:26 rhel-8-10 bash[xxxx]: zone root-servers.net/IN: loaded serial 0 Jul 03 15:16:26 rhel-8-10 named[xxxx]: zone root-servers.net/IN: loaded serial 0 Verify that the DNS server can resolve the NS record for the root-servers.net domain by running the following command: USD host -t NS root-servers.net. 127.0.0.1 Example output Using domain server: Name: 127.0.0.1 Address: 127.0.0.53 Aliases: root-servers.net name server root-servers.net. 21.2.2.2. Configuring the dnsmasq DNS server If you are using dnsmasq as the DNS server, you can delegate resolution of the root-servers.net domain to another DNS server, for example, by creating a new configuration file that resolves root-servers.net using a DNS server that you specify. Create a configuration file that delegates the domain root-servers.net to another DNS server by running the following command: USD echo 'server=/root-servers.net/<DNS_server_IP>'> /etc/dnsmasq.d/delegate-root-servers.net.conf Restart the dnsmasq service by running the following command: USD systemctl restart dnsmasq Confirm that the root-servers.net domain is delegated to another DNS server by running the following command: USD journalctl -u dnsmasq|grep root-servers.net Example output Jul 03 15:31:25 rhel-8-10 dnsmasq[1342]: using nameserver 192.168.1.1#53 for domain root-servers.net Verify that the DNS server can resolve the NS record for the root-servers.net domain by running the following command: USD host -t NS root-servers.net. 127.0.0.1 Example output Using domain server: Name: 127.0.0.1 Address: 127.0.0.1#53 Aliases: root-servers.net name server root-servers.net.

Commands:
oc get nns
oc get nns node01 -o yaml
apiVersion: nmstate.io/v1 kind: NodeNetworkState metadata: name: node01 1 status: currentState: 2 dns-resolver: interfaces: route-rules: routes: lastSuccessfulUpdateTime: "2020-01-31T12:14:00Z" 3
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: worker-0-ipoib spec: interfaces: - description: "" infiniband: mode: datagram 1 pkey: "0xffff" 2 ipv4: address: - ip: 100.125.3.4 prefix-length: 16 dhcp: false enabled: true ipv6: enabled: false name: ibp27s0 state: up type: infiniband 3
oc apply -f <nncp_file_name> 1
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-policy 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 maxUnavailable: 3 4 desiredState: interfaces: - name: br1 description: Linux bridge with eth1 as a port 5 type: linux-bridge state: up ipv4: dhcp: true enabled: true auto-dns: false bridge: options: stp: enabled: false port: - name: eth1 dns-resolver: 6 config: search: - example.com - example.org server: - 8.8.8.8
oc apply -f br1-eth1-policy.yaml 1
oc get nncp
oc get nncp <policy> -o yaml
oc get nnce
oc get nnce <node>.<policy> -o yaml
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: <br1-eth1-policy> 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 desiredState: interfaces: - name: br1 type: linux-bridge state: absent 4 - name: eth1 5 type: ethernet 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9
oc apply -f <br1-eth1-policy.yaml> 1
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: br1 4 description: Linux bridge with eth1 as a port 5 type: linux-bridge 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 bridge: options: stp: enabled: false 10 port: - name: eth1 11
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: vlan-eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: eth1.102 4 description: VLAN using eth1 5 type: vlan 6 state: up 7 vlan: base-iface: eth1 8 id: 102 9
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: qos 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 desiredState: interfaces: - name: ens1f0 4 description: Change QOS on VF0 5 type: ethernet 6 state: up 7 ethernet: sr-iov: total-vfs: 3 8 vfs: - id: 0 9 max-tx-rate: 200 10
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: addvf 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" 3 maxUnavailable: 3 desiredState: interfaces: - name: ens1f1 4 type: ethernet state: up ethernet: sr-iov: total-vfs: 1 5 vfs: - id: 0 trust: true 6 vlan-id: 477 7 - name: bond0 8 description: Attach VFs to bond 9 type: bond 10 state: up 11 link-aggregation: mode: active-backup 12 options: primary: ens1f0v0 13 port: 14 - ens1f0v0 - ens1f1v0 15
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: bond0-eth1-eth2-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: bond0 4 description: Bond with ports eth1 and eth2 5 type: bond 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9 link-aggregation: mode: active-backup 10 options: miimon: '140' 11 port: 12 - eth1 - eth2 mtu: 1450 13
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: eth1-policy 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: eth1 4 description: Configuring eth1 on node01 5 type: ethernet 6 state: up 7 ipv4: dhcp: true 8 enabled: true 9
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: bond-vlan 1 spec: nodeSelector: 2 kubernetes.io/hostname: <node01> 3 desiredState: interfaces: - name: bond10 4 description: Bonding eth2 and eth3 5 type: bond 6 state: up 7 link-aggregation: mode: balance-xor 8 options: miimon: '140' 9 port: 10 - eth2 - eth3 - name: bond10.103 11 description: vlan using bond10 12 type: vlan 13 state: up 14 vlan: base-iface: bond10 15 id: 103 16 ipv4: dhcp: true 17 enabled: true 18
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: vrfpolicy 1 spec: nodeSelector: vrf: "true" 2 maxUnavailable: 3 desiredState: interfaces: - name: ens4vrf 3 type: vrf 4 state: up vrf: port: - ens4 5 route-table-id: 2 6
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: br1-eth1-copy-ipv4-policy 1 spec: nodeSelector: 2 node-role.kubernetes.io/worker: "" capture: eth1-nic: interfaces.name=="eth1" 3 eth1-routes: routes.running.next-hop-interface=="eth1" br1-routes: capture.eth1-routes | routes.running.next-hop-interface := "br1" desiredState: interfaces: - name: br1 description: Linux bridge with eth1 as a port type: linux-bridge 4 state: up ipv4: "{{ capture.eth1-nic.interfaces.0.ipv4 }}" 5 bridge: options: stp: enabled: false port: - name: eth1 6 routes: config: "{{ capture.br1-routes.routes.running }}"
interfaces: - name: eth1 description: static IP on eth1 type: ethernet state: up ipv4: dhcp: false address: - ip: 192.168.122.250 1 prefix-length: 24 enabled: true
interfaces: - name: eth1 description: No IP on eth1 type: ethernet state: up ipv4: enabled: false
interfaces: - name: eth1 description: DHCP on eth1 type: ethernet state: up ipv4: dhcp: true enabled: true
interfaces: - name: eth1 description: DHCP without gateway or DNS on eth1 type: ethernet state: up ipv4: dhcp: true auto-gateway: false auto-dns: false enabled: true
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: worker-0-dns-testing spec: nodeSelector: kubernetes.io/hostname: <target_node> desiredState: dns-resolver: config: search: - example.com - example.org server: - 2001:db8:f::1 - 192.0.2.251
desiredState: dns-resolver: config: search: options: - timeout:2 - attempts:3
dns-resolver: config: {} interfaces: []
dns-resolver: config: server: - 192.0.2.1 interfaces: - name: eth1 type: ethernet state: up ipv4: enabled: true dhcp: true auto-dns: true
dns-resolver: config: search: - example.com - example.org server: - 2001:db8:1::d1 - 2001:db8:1::d2 - 192.0.2.1 interfaces: - name: eth1 type: ethernet state: up ipv4: address: - ip: 192.0.2.251 prefix-length: 24 dhcp: false enabled: true ipv6: address: - ip: 2001:db8:1::1 prefix-length: 64 dhcp: false enabled: true autoconf: false
dns-resolver: config: search: - example.com - example.org server: [] interfaces: - name: eth1 type: ethernet state: up ipv4: enabled: true dhcp: true auto-dns: true ipv6: enabled: true dhcp: true autoconf: true auto-dns: true
dns-resolver: config: interfaces: - name: eth1 description: Static routing on eth1 type: ethernet state: up ipv4: dhcp: false enabled: true address: - ip: 192.0.2.251 1 prefix-length: 24 routes: config: - destination: 198.51.100.0/24 metric: 150 next-hop-address: 192.0.2.1 2 next-hop-interface: eth1 table-id: 254
apiVersion: nmstate.io/v1 kind: NodeNetworkConfigurationPolicy metadata: name: ens01-bridge-testfail spec: desiredState: interfaces: - name: br1 description: Linux bridge with the wrong port type: linux-bridge state: up ipv4: dhcp: true enabled: true bridge: options: stp: enabled: false port: - name: ens01
oc apply -f ens01-bridge-testfail.yaml
nodenetworkconfigurationpolicy.nmstate.io/ens01-bridge-testfail created
oc get nncp
NAME STATUS ens01-bridge-testfail FailedToConfigure
oc get nnce
NAME STATUS control-plane-1.ens01-bridge-testfail FailedToConfigure control-plane-2.ens01-bridge-testfail FailedToConfigure control-plane-3.ens01-bridge-testfail FailedToConfigure compute-1.ens01-bridge-testfail FailedToConfigure compute-2.ens01-bridge-testfail FailedToConfigure compute-3.ens01-bridge-testfail FailedToConfigure
oc get nnce compute-1.ens01-bridge-testfail -o jsonpath='{.status.conditions[?(@.type=="Failing")].message}'
[2024-10-10T08:40:46Z INFO nmstatectl] Nmstate version: 2.2.37 NmstateError: InvalidArgument: Controller interface br1 is holding unknown port ens01
oc get nns control-plane-1 -o yaml
- ipv4: name: ens1 state: up type: ethernet
oc edit nncp ens01-bridge-testfail
port: - name: ens1
oc get nncp
NAME STATUS ens01-bridge-testfail SuccessfullyConfigured
cat >> /etc/named.conf <<EOF zone "root-servers.net" IN { type master; file "named.localhost"; }; EOF
systemctl restart named
journalctl -u named|grep root-servers.net
Jul 03 15:16:26 rhel-8-10 bash[xxxx]: zone root-servers.net/IN: loaded serial 0 Jul 03 15:16:26 rhel-8-10 named[xxxx]: zone root-servers.net/IN: loaded serial 0
host -t NS root-servers.net. 127.0.0.1
Using domain server: Name: 127.0.0.1 Address: 127.0.0.53 Aliases: root-servers.net name server root-servers.net.
echo 'server=/root-servers.net/<DNS_server_IP>'> /etc/dnsmasq.d/delegate-root-servers.net.conf
systemctl restart dnsmasq
journalctl -u dnsmasq|grep root-servers.net
Jul 03 15:31:25 rhel-8-10 dnsmasq[1342]: using nameserver 192.168.1.1#53 for domain root-servers.net
host -t NS root-servers.net. 127.0.0.1
Using domain server: Name: 127.0.0.1 Address: 127.0.0.1#53 Aliases: root-servers.net name server root-servers.net.