mirror of https://github.com/kubernetes/kops.git
124 lines
3.9 KiB
Go
124 lines
3.9 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 cloudup
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import (
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"fmt"
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"github.com/golang/glog"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/util/pkg/vfs"
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"strings"
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)
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// PerformAssignments populates values that are required and immutable
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// For example, it assigns stable Keys to InstanceGroups & Masters, and
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// it assigns CIDRs to subnets
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// We also assign KubernetesVersion, because we want it to be explicit
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//
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// PerformAssignments is called on create, as well as an update. In fact
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// any time Run() is called in apply_cluster.go we will reach this function.
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// Please do all after-market logic here.
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//
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func PerformAssignments(c *kops.Cluster) error {
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cloud, err := BuildCloud(c)
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if err != nil {
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return err
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}
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if c.SharedVPC() && c.Spec.NetworkCIDR == "" {
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vpcInfo, err := cloud.FindVPCInfo(c.Spec.NetworkID)
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if err != nil {
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return err
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}
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if vpcInfo == nil {
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return fmt.Errorf("unable to find VPC ID %q", c.Spec.NetworkID)
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}
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c.Spec.NetworkCIDR = vpcInfo.CIDR
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if c.Spec.NetworkCIDR == "" {
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return fmt.Errorf("Unable to infer NetworkCIDR from VPC ID, please specify --network-cidr")
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}
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}
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// Topology support
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// TODO Kris: Unsure if this needs to be here, or if the API conversion code will handle it
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if c.Spec.Topology == nil {
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c.Spec.Topology = &kops.TopologySpec{Masters: kops.TopologyPublic, Nodes: kops.TopologyPublic}
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}
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if c.Spec.NetworkCIDR == "" && !c.SharedVPC() {
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// TODO: Choose non-overlapping networking CIDRs for VPCs, using vpcInfo
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c.Spec.NetworkCIDR = "172.20.0.0/16"
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}
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if c.Spec.NonMasqueradeCIDR == "" {
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c.Spec.NonMasqueradeCIDR = "100.64.0.0/10"
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}
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// TODO: Unclear this should be here - it isn't too hard to change
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if c.Spec.MasterPublicName == "" && c.ObjectMeta.Name != "" {
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c.Spec.MasterPublicName = "api." + c.ObjectMeta.Name
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}
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// TODO: Use vpcInfo
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err = assignCIDRsToSubnets(c)
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if err != nil {
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return err
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}
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return ensureKubernetesVersion(c)
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}
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// ensureKubernetesVersion populates KubernetesVersion, if it is not already set
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// It will be populated with the latest stable kubernetes version, or the version from the channel
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func ensureKubernetesVersion(c *kops.Cluster) error {
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if c.Spec.KubernetesVersion == "" {
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if c.Spec.Channel != "" {
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channel, err := kops.LoadChannel(c.Spec.Channel)
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if err != nil {
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return err
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}
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if channel.Spec.Cluster.KubernetesVersion != "" {
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c.Spec.KubernetesVersion = channel.Spec.Cluster.KubernetesVersion
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}
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}
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}
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if c.Spec.KubernetesVersion == "" {
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latestVersion, err := FindLatestKubernetesVersion()
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if err != nil {
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return err
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}
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glog.Infof("Using kubernetes latest stable version: %s", latestVersion)
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c.Spec.KubernetesVersion = latestVersion
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}
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return nil
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}
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// FindLatestKubernetesVersion returns the latest kubernetes version,
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// as stored at https://storage.googleapis.com/kubernetes-release/release/stable.txt
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// This shouldn't be used any more; we prefer reading the stable channel
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func FindLatestKubernetesVersion() (string, error) {
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stableURL := "https://storage.googleapis.com/kubernetes-release/release/stable.txt"
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glog.Warningf("Loading latest kubernetes version from %q", stableURL)
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b, err := vfs.Context.ReadFile(stableURL)
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if err != nil {
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return "", fmt.Errorf("KubernetesVersion not specified, and unable to download latest version from %q: %v", stableURL, err)
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}
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latestVersion := strings.TrimSpace(string(b))
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return latestVersion, nil
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}
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