mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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108 lines
3.5 KiB
Go
108 lines
3.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package node
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import (
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"fmt"
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"net"
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v1 "k8s.io/api/core/v1"
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netutils "k8s.io/utils/net"
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)
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const (
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// NodeUnreachablePodReason is the reason on a pod when its state cannot be confirmed as kubelet is unresponsive
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// on the node it is (was) running.
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NodeUnreachablePodReason = "NodeLost"
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// NodeUnreachablePodMessage is the message on a pod when its state cannot be confirmed as kubelet is unresponsive
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// on the node it is (was) running.
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NodeUnreachablePodMessage = "Node %v which was running pod %v is unresponsive"
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)
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// NoMatchError is a typed implementation of the error interface. It indicates a failure to get a matching Node.
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type NoMatchError struct {
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addresses []v1.NodeAddress
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}
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// Error is the implementation of the conventional interface for
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// representing an error condition, with the nil value representing no error.
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func (e *NoMatchError) Error() string {
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return fmt.Sprintf("no preferred addresses found; known addresses: %v", e.addresses)
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}
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// GetPreferredNodeAddress returns the address of the provided node, using the provided preference order.
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// If none of the preferred address types are found, an error is returned.
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func GetPreferredNodeAddress(node *v1.Node, preferredAddressTypes []v1.NodeAddressType) (string, error) {
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for _, addressType := range preferredAddressTypes {
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for _, address := range node.Status.Addresses {
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if address.Type == addressType {
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return address.Address, nil
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}
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}
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}
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return "", &NoMatchError{addresses: node.Status.Addresses}
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}
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// GetNodeHostIPs returns the provided node's IP(s); either a single "primary IP" for the
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// node in a single-stack cluster, or a dual-stack pair of IPs in a dual-stack cluster
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// (for nodes that actually have dual-stack IPs). Among other things, the IPs returned
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// from this function are used as the `.status.PodIPs` values for host-network pods on the
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// node, and the first IP is used as the `.status.HostIP` for all pods on the node.
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func GetNodeHostIPs(node *v1.Node) ([]net.IP, error) {
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// Re-sort the addresses with InternalIPs first and then ExternalIPs
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allIPs := make([]net.IP, 0, len(node.Status.Addresses))
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for _, addr := range node.Status.Addresses {
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if addr.Type == v1.NodeInternalIP {
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ip := netutils.ParseIPSloppy(addr.Address)
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if ip != nil {
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allIPs = append(allIPs, ip)
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}
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}
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}
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for _, addr := range node.Status.Addresses {
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if addr.Type == v1.NodeExternalIP {
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ip := netutils.ParseIPSloppy(addr.Address)
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if ip != nil {
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allIPs = append(allIPs, ip)
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}
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}
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}
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if len(allIPs) == 0 {
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return nil, fmt.Errorf("host IP unknown; known addresses: %v", node.Status.Addresses)
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}
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nodeIPs := []net.IP{allIPs[0]}
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for _, ip := range allIPs {
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if netutils.IsIPv6(ip) != netutils.IsIPv6(nodeIPs[0]) {
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nodeIPs = append(nodeIPs, ip)
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break
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}
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}
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return nodeIPs, nil
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}
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// IsNodeReady returns true if a node is ready; false otherwise.
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func IsNodeReady(node *v1.Node) bool {
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for _, c := range node.Status.Conditions {
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if c.Type == v1.NodeReady {
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return c.Status == v1.ConditionTrue
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}
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}
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return false
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}
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