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support to use external dns to resolve control-plane domain 

Signed-off-by: pixiake <guofeng@yunify.com>
This commit is contained in:
pixiake 2023-07-13 14:53:34 +08:00
parent b4edf604e0
commit bd9b7d5603
3 changed files with 17 additions and 5 deletions
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9
cmd/kk/apis/kubekey/v1alpha2/cluster_types.go
View File

@ -74,6 +74,7 @@ type HostCfg struct {
type ControlPlaneEndpoint struct {
InternalLoadbalancer string `yaml:"internalLoadbalancer" json:"internalLoadbalancer,omitempty"`
Domain string `yaml:"domain" json:"domain,omitempty"`
ExternalDNS *bool `yaml:"externalDNS" json:"externalDNS"`
Address string `yaml:"address" json:"address,omitempty"`
Port int `yaml:"port" json:"port,omitempty"`
KubeVip KubeVip `yaml:"kubevip" json:"kubevip,omitempty"`
@ -296,3 +297,11 @@ func (c ControlPlaneEndpoint) IsInternalLBEnabled() bool {
func (c ControlPlaneEndpoint) IsInternalLBEnabledVip() bool {
return c.InternalLoadbalancer == Kubevip
}
// EnableExternalDNS is used to determine whether to use external dns to resolve kube-apiserver domain.
func (c *ControlPlaneEndpoint) EnableExternalDNS() bool {
if c.ExternalDNS == nil {
return false
}
return *c.ExternalDNS
}

6
cmd/kk/apis/kubekey/v1alpha2/default.go
View File

@ -185,9 +185,9 @@ func SetDefaultHostsCfg(cfg *ClusterSpec) []HostCfg {
func SetDefaultLBCfg(cfg *ClusterSpec, masterGroup []*KubeHost) ControlPlaneEndpoint {
//Check whether LB should be configured
if len(masterGroup) >= 2 && !cfg.ControlPlaneEndpoint.IsInternalLBEnabled() && cfg.ControlPlaneEndpoint.Address == "" {
if len(masterGroup) >= 2 && !cfg.ControlPlaneEndpoint.IsInternalLBEnabled() && cfg.ControlPlaneEndpoint.Address == "" && !cfg.ControlPlaneEndpoint.EnableExternalDNS() {
fmt.Println()
fmt.Println("Warning: When there are at least two nodes in the control-plane, you should set the value of the LB address or enable the internal loadbalancer, if the 'ControlPlaneEndpoint.Domain' cannot be resolved in your dns server.")
fmt.Println("Warning: When there are at least two nodes in the control-plane, you should set the value of the LB address or enable the internal loadbalancer, or set 'controlPlaneEndpoint.externalDNS' to 'true' if the 'controlPlaneEndpoint.domain' can be resolved in your dns server.")
fmt.Println()
}
@ -197,7 +197,7 @@ func SetDefaultLBCfg(cfg *ClusterSpec, masterGroup []*KubeHost) ControlPlaneEndp
os.Exit(0)
}
if cfg.ControlPlaneEndpoint.Address == "127.0.0.1" {
if (cfg.ControlPlaneEndpoint.Address == "" && !cfg.ControlPlaneEndpoint.EnableExternalDNS()) || cfg.ControlPlaneEndpoint.Address == "127.0.0.1" {
cfg.ControlPlaneEndpoint.Address = masterGroup[0].InternalAddress
}
if cfg.ControlPlaneEndpoint.Domain == "" {

7
docs/config-example.md
View File

@ -23,8 +23,11 @@ spec:
- node1
- node[10:100] # All the nodes in your cluster that serve as the worker nodes.
controlPlaneEndpoint:
#Internal loadbalancer for apiservers. Support: haproxy, kube-vip [Default: ""]
internalLoadbalancer: haproxy
# Internal loadbalancer for apiservers. Support: haproxy, kube-vip [Default: ""]
internalLoadbalancer: haproxy
# Determines whether to use external dns to resolve the control-plane domain.
# If 'externalDNS' is set to 'true', the 'address' needs to be set to "".
externalDNS: false
domain: lb.kubesphere.local
# The IP address of your load balancer. If you use internalLoadblancer in "kube-vip" mode, a VIP is required here.
address: ""