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defaults.go
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defaults.go
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package cluster
import (
"context"
"fmt"
"github.com/rancher/rke/k8s"
"github.com/rancher/rke/log"
"github.com/rancher/rke/services"
"github.com/rancher/types/apis/management.cattle.io/v3"
)
const (
DefaultServiceClusterIPRange = "10.43.0.0/16"
DefaultNodePortRange = "30000-32767"
DefaultClusterCIDR = "10.42.0.0/16"
DefaultClusterDNSService = "10.43.0.10"
DefaultClusterDomain = "cluster.local"
DefaultClusterName = "local"
DefaultClusterSSHKeyPath = "~/.ssh/id_rsa"
DefaultK8sVersion = v3.DefaultK8s
DefaultSSHPort = "22"
DefaultDockerSockPath = "/var/run/docker.sock"
DefaultAuthStrategy = "x509"
DefaultAuthorizationMode = "rbac"
DefaultNetworkPlugin = "canal"
DefaultNetworkCloudProvider = "none"
DefaultIngressController = "nginx"
DefaultEtcdBackupCreationPeriod = "5m0s"
DefaultEtcdBackupRetentionPeriod = "24h"
DefaultMonitoringProvider = "metrics-server"
)
func setDefaultIfEmptyMapValue(configMap map[string]string, key string, value string) {
if _, ok := configMap[key]; !ok {
configMap[key] = value
}
}
func setDefaultIfEmpty(varName *string, defaultValue string) {
if len(*varName) == 0 {
*varName = defaultValue
}
}
func (c *Cluster) setClusterDefaults(ctx context.Context) {
if len(c.SSHKeyPath) == 0 {
c.SSHKeyPath = DefaultClusterSSHKeyPath
}
// Default Path prefix
if len(c.PrefixPath) == 0 {
c.PrefixPath = "/"
}
// Set bastion/jump host defaults
if len(c.BastionHost.Address) > 0 {
if len(c.BastionHost.Port) == 0 {
c.BastionHost.Port = DefaultSSHPort
}
if len(c.BastionHost.SSHKeyPath) == 0 {
c.BastionHost.SSHKeyPath = c.SSHKeyPath
}
c.BastionHost.SSHAgentAuth = c.SSHAgentAuth
}
for i, host := range c.Nodes {
if len(host.InternalAddress) == 0 {
c.Nodes[i].InternalAddress = c.Nodes[i].Address
}
if len(host.HostnameOverride) == 0 {
// This is a temporary modification
c.Nodes[i].HostnameOverride = c.Nodes[i].Address
}
if len(host.SSHKeyPath) == 0 {
c.Nodes[i].SSHKeyPath = c.SSHKeyPath
}
if len(host.Port) == 0 {
c.Nodes[i].Port = DefaultSSHPort
}
// For now, you can set at the global level only.
c.Nodes[i].SSHAgentAuth = c.SSHAgentAuth
}
if len(c.Authorization.Mode) == 0 {
c.Authorization.Mode = DefaultAuthorizationMode
}
if c.Services.KubeAPI.PodSecurityPolicy && c.Authorization.Mode != services.RBACAuthorizationMode {
log.Warnf(ctx, "PodSecurityPolicy can't be enabled with RBAC support disabled")
c.Services.KubeAPI.PodSecurityPolicy = false
}
if len(c.Ingress.Provider) == 0 {
c.Ingress.Provider = DefaultIngressController
}
if len(c.ClusterName) == 0 {
c.ClusterName = DefaultClusterName
}
if len(c.Version) == 0 {
c.Version = DefaultK8sVersion
}
if c.AddonJobTimeout == 0 {
c.AddonJobTimeout = k8s.DefaultTimeout
}
if len(c.Monitoring.Provider) == 0 {
c.Monitoring.Provider = DefaultMonitoringProvider
}
c.setClusterImageDefaults()
c.setClusterServicesDefaults()
c.setClusterNetworkDefaults()
}
func (c *Cluster) setClusterServicesDefaults() {
// We don't accept per service images anymore.
c.Services.KubeAPI.Image = c.SystemImages.Kubernetes
c.Services.Scheduler.Image = c.SystemImages.Kubernetes
c.Services.KubeController.Image = c.SystemImages.Kubernetes
c.Services.Kubelet.Image = c.SystemImages.Kubernetes
c.Services.Kubeproxy.Image = c.SystemImages.Kubernetes
c.Services.Etcd.Image = c.SystemImages.Etcd
serviceConfigDefaultsMap := map[*string]string{
&c.Services.KubeAPI.ServiceClusterIPRange: DefaultServiceClusterIPRange,
&c.Services.KubeAPI.ServiceNodePortRange: DefaultNodePortRange,
&c.Services.KubeController.ServiceClusterIPRange: DefaultServiceClusterIPRange,
&c.Services.KubeController.ClusterCIDR: DefaultClusterCIDR,
&c.Services.Kubelet.ClusterDNSServer: DefaultClusterDNSService,
&c.Services.Kubelet.ClusterDomain: DefaultClusterDomain,
&c.Services.Kubelet.InfraContainerImage: c.SystemImages.PodInfraContainer,
&c.Authentication.Strategy: DefaultAuthStrategy,
&c.Services.Etcd.Creation: DefaultEtcdBackupCreationPeriod,
&c.Services.Etcd.Retention: DefaultEtcdBackupRetentionPeriod,
}
for k, v := range serviceConfigDefaultsMap {
setDefaultIfEmpty(k, v)
}
}
func (c *Cluster) setClusterImageDefaults() {
var privRegURL string
imageDefaults, ok := v3.K8sVersionToRKESystemImages[c.Version]
if !ok {
imageDefaults = v3.K8sVersionToRKESystemImages[DefaultK8sVersion]
}
for _, privReg := range c.PrivateRegistries {
if privReg.IsDefault {
privRegURL = privReg.URL
break
}
}
systemImagesDefaultsMap := map[*string]string{
&c.SystemImages.Alpine: d(imageDefaults.Alpine, privRegURL),
&c.SystemImages.NginxProxy: d(imageDefaults.NginxProxy, privRegURL),
&c.SystemImages.CertDownloader: d(imageDefaults.CertDownloader, privRegURL),
&c.SystemImages.KubeDNS: d(imageDefaults.KubeDNS, privRegURL),
&c.SystemImages.KubeDNSSidecar: d(imageDefaults.KubeDNSSidecar, privRegURL),
&c.SystemImages.DNSmasq: d(imageDefaults.DNSmasq, privRegURL),
&c.SystemImages.KubeDNSAutoscaler: d(imageDefaults.KubeDNSAutoscaler, privRegURL),
&c.SystemImages.KubernetesServicesSidecar: d(imageDefaults.KubernetesServicesSidecar, privRegURL),
&c.SystemImages.Etcd: d(imageDefaults.Etcd, privRegURL),
&c.SystemImages.Kubernetes: d(imageDefaults.Kubernetes, privRegURL),
&c.SystemImages.PodInfraContainer: d(imageDefaults.PodInfraContainer, privRegURL),
&c.SystemImages.Flannel: d(imageDefaults.Flannel, privRegURL),
&c.SystemImages.FlannelCNI: d(imageDefaults.FlannelCNI, privRegURL),
&c.SystemImages.CalicoNode: d(imageDefaults.CalicoNode, privRegURL),
&c.SystemImages.CalicoCNI: d(imageDefaults.CalicoCNI, privRegURL),
&c.SystemImages.CalicoCtl: d(imageDefaults.CalicoCtl, privRegURL),
&c.SystemImages.CanalNode: d(imageDefaults.CanalNode, privRegURL),
&c.SystemImages.CanalCNI: d(imageDefaults.CanalCNI, privRegURL),
&c.SystemImages.CanalFlannel: d(imageDefaults.CanalFlannel, privRegURL),
&c.SystemImages.WeaveNode: d(imageDefaults.WeaveNode, privRegURL),
&c.SystemImages.WeaveCNI: d(imageDefaults.WeaveCNI, privRegURL),
&c.SystemImages.Ingress: d(imageDefaults.Ingress, privRegURL),
&c.SystemImages.IngressBackend: d(imageDefaults.IngressBackend, privRegURL),
&c.SystemImages.MetricsServer: d(imageDefaults.MetricsServer, privRegURL),
}
for k, v := range systemImagesDefaultsMap {
setDefaultIfEmpty(k, v)
}
}
func (c *Cluster) setClusterNetworkDefaults() {
setDefaultIfEmpty(&c.Network.Plugin, DefaultNetworkPlugin)
if c.Network.Options == nil {
// don't break if the user didn't define options
c.Network.Options = make(map[string]string)
}
networkPluginConfigDefaultsMap := make(map[string]string)
// This is still needed because RKE doesn't use c.Network.*NetworkProvider, that's a rancher type
switch c.Network.Plugin {
case CalicoNetworkPlugin:
networkPluginConfigDefaultsMap = map[string]string{
CalicoCloudProvider: DefaultNetworkCloudProvider,
}
case FlannelNetworkPlugin:
networkPluginConfigDefaultsMap = map[string]string{
FlannelBackendType: "vxlan",
}
case CanalNetworkPlugin:
networkPluginConfigDefaultsMap = map[string]string{
CanalFlannelBackendType: "vxlan",
}
}
if c.Network.CalicoNetworkProvider != nil {
setDefaultIfEmpty(&c.Network.CalicoNetworkProvider.CloudProvider, DefaultNetworkCloudProvider)
networkPluginConfigDefaultsMap[CalicoCloudProvider] = c.Network.CalicoNetworkProvider.CloudProvider
}
if c.Network.FlannelNetworkProvider != nil {
networkPluginConfigDefaultsMap[FlannelIface] = c.Network.FlannelNetworkProvider.Iface
}
if c.Network.CanalNetworkProvider != nil {
networkPluginConfigDefaultsMap[CanalIface] = c.Network.CanalNetworkProvider.Iface
}
for k, v := range networkPluginConfigDefaultsMap {
setDefaultIfEmptyMapValue(c.Network.Options, k, v)
}
}
func d(image, defaultRegistryURL string) string {
if len(defaultRegistryURL) == 0 {
return image
}
return fmt.Sprintf("%s/%s", defaultRegistryURL, image)
}