mirror of
https://github.com/k3s-io/k3s.git
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55 lines
2.1 KiB
Go
55 lines
2.1 KiB
Go
/*
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Copyright 2016 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 controlplane
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import (
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"fmt"
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"net"
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"k8s.io/klog/v2"
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"k8s.io/utils/integer"
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utilnet "k8s.io/utils/net"
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kubeoptions "k8s.io/kubernetes/pkg/kubeapiserver/options"
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)
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// ServiceIPRange checks if the serviceClusterIPRange flag is nil, raising a warning if so and
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// setting service ip range to the default value in kubeoptions.DefaultServiceIPCIDR
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// for now until the default is removed per the deprecation timeline guidelines.
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// Returns service ip range, api server service IP, and an error
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func ServiceIPRange(passedServiceClusterIPRange net.IPNet) (net.IPNet, net.IP, error) {
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serviceClusterIPRange := passedServiceClusterIPRange
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if passedServiceClusterIPRange.IP == nil {
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klog.Warningf("No CIDR for service cluster IPs specified. Default value which was %s is deprecated and will be removed in future releases. Please specify it using --service-cluster-ip-range on kube-apiserver.", kubeoptions.DefaultServiceIPCIDR.String())
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serviceClusterIPRange = kubeoptions.DefaultServiceIPCIDR
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}
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size := integer.Int64Min(utilnet.RangeSize(&serviceClusterIPRange), 1<<16)
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if size < 8 {
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return net.IPNet{}, net.IP{}, fmt.Errorf("the service cluster IP range must be at least %d IP addresses", 8)
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}
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// Select the first valid IP from ServiceClusterIPRange to use as the GenericAPIServer service IP.
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apiServerServiceIP, err := utilnet.GetIndexedIP(&serviceClusterIPRange, 1)
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if err != nil {
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return net.IPNet{}, net.IP{}, err
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}
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klog.V(4).Infof("Setting service IP to %q (read-write).", apiServerServiceIP)
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return serviceClusterIPRange, apiServerServiceIP, nil
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}
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