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Merge pull request #51249 from tengqm/service-ip-cidr

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Automatic merge from submit-queue (batch tested with PRs 59882, 59434, 57722, 60320, 51249). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Expose default service IP CIDR in apiserver

**What this PR does / why we need it**:
The `--service-cluster-ip-range` parameter of API server is very important for deploying Kubernetes on some clouds. The default CIDR "10.0.0.0/24" should be exposed at least from the API server's help message so that users have a better idea whether they need to change it.
This patch exposes this default value in API server's help message.

**Which issue this PR fixes** : fixes #51248

**Release note**:
```
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2018-02-24 18:43:39 -08:00 committed by GitHub
commit 9714b64761
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4 changed files with 11 additions and 8 deletions
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2
cmd/kube-apiserver/app/options/options.go
View File

@ -115,6 +115,8 @@ func NewServerRunOptions() *ServerRunOptions {
},
ServiceNodePortRange: kubeoptions.DefaultServiceNodePortRange,
}
s.ServiceClusterIPRange = kubeoptions.DefaultServiceIPCIDR
// Overwrite the default for storage data format.
s.Etcd.DefaultStorageMediaType = "application/vnd.kubernetes.protobuf"

1
cmd/kube-apiserver/app/options/options_test.go
View File

@ -101,6 +101,7 @@ func TestAddFlags(t *testing.T) {
// This is a snapshot of expected options parsed by args.
expected := &ServerRunOptions{
ServiceNodePortRange: kubeoptions.DefaultServiceNodePortRange,
ServiceClusterIPRange: kubeoptions.DefaultServiceIPCIDR,
MasterCount: 5,
EndpointReconcilerType: string(reconcilers.MasterCountReconcilerType),
AllowPrivileged: false,

5
pkg/kubeapiserver/options/options.go
View File

@ -17,8 +17,13 @@ limitations under the License.
package options
import (
"net"
utilnet "k8s.io/apimachinery/pkg/util/net"
)
// DefaultServiceNodePortRange is the default port range for NodePort services.
var DefaultServiceNodePortRange = utilnet.PortRange{Base: 30000, Size: 2768}
// DefaultServiceIPCIDR is a CIDR notation of IP range from which to allocate service cluster IPs
var DefaultServiceIPCIDR net.IPNet = net.IPNet{IP: net.ParseIP("10.0.0.0"), Mask: net.CIDRMask(24, 32)}

11
pkg/master/services.go
View File

@ -21,7 +21,7 @@ import (
"net"
"github.com/golang/glog"
kubeoptions "k8s.io/kubernetes/pkg/kubeapiserver/options"
"k8s.io/kubernetes/pkg/registry/core/service/ipallocator"
)
@ -30,13 +30,8 @@ import (
func DefaultServiceIPRange(passedServiceClusterIPRange net.IPNet) (net.IPNet, net.IP, error) {
serviceClusterIPRange := passedServiceClusterIPRange
if passedServiceClusterIPRange.IP == nil {
defaultNet := "10.0.0.0/24"
glog.Infof("Network range for service cluster IPs is unspecified. Defaulting to %v.", defaultNet)
_, defaultServiceClusterIPRange, err := net.ParseCIDR(defaultNet)
if err != nil {
return net.IPNet{}, net.IP{}, err
}
serviceClusterIPRange = *defaultServiceClusterIPRange
glog.Infof("Network range for service cluster IPs is unspecified. Defaulting to %v.", kubeoptions.DefaultServiceIPCIDR)
serviceClusterIPRange = kubeoptions.DefaultServiceIPCIDR
}
if size := ipallocator.RangeSize(&serviceClusterIPRange); size < 8 {
return net.IPNet{}, net.IP{}, fmt.Errorf("The service cluster IP range must be at least %d IP addresses", 8)