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config.go
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config.go
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/*
Copyright 2019 The KubeOne Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package v1beta2
import (
"encoding/json"
"fmt"
"sort"
"strings"
"dario.cat/mergo"
kubeonev1beta2 "k8c.io/kubeone/pkg/apis/kubeone/v1beta2"
"k8c.io/kubeone/pkg/fail"
"k8c.io/kubeone/pkg/templates/machinecontroller"
corev1 "k8s.io/api/core/v1"
)
// Config represents configuration in the terraform output format
type Config struct {
KubeOneAPI struct {
Sensitive json.RawMessage `json:"sensitive"`
Type json.RawMessage `json:"type"`
Value struct {
Endpoint string `json:"endpoint"`
APIServerAlternativeNames []string `json:"apiserver_alternative_names"`
} `json:"value"`
} `json:"kubeone_api"`
KubeOneHosts struct {
Sensitive json.RawMessage `json:"sensitive"`
Type json.RawMessage `json:"type"`
Value struct {
ControlPlane controlPlane `json:"control_plane"`
} `json:"value"`
} `json:"kubeone_hosts"`
KubeOneWorkers struct {
Sensitive json.RawMessage `json:"sensitive"`
Type json.RawMessage `json:"type"`
Value map[string]kubeonev1beta2.DynamicWorkerConfig `json:"value"`
} `json:"kubeone_workers"`
KubeOneStaticWorkers struct {
Sensitive json.RawMessage `json:"sensitive"`
Type json.RawMessage `json:"type"`
Value map[string]hostsSpec `json:"value"`
} `json:"kubeone_static_workers"`
Proxy struct {
Sensitive json.RawMessage `json:"sensitive"`
Type json.RawMessage `json:"type"`
Value kubeonev1beta2.ProxyConfig `json:"value"`
} `json:"proxy"`
}
type controlPlane struct {
ClusterName string `json:"cluster_name"`
CloudProvider *string `json:"cloud_provider"`
LeaderIP string `json:"leader_ip"`
Untaint bool `json:"untaint"`
NetworkID string `json:"network_id"`
VAppName string `json:"vapp_name"`
StorageProfile string `json:"storage_profile"`
hostsSpec
}
type hostsSpec struct {
PublicAddress []string `json:"public_address"`
IPv6Addresses [][]string `json:"ipv6_addresses"`
PrivateAddress []string `json:"private_address"`
Hostnames []string `json:"hostnames"`
OperatingSystem string `json:"operating_system"`
SSHUser string `json:"ssh_user"`
SSHPort int `json:"ssh_port"`
SSHPrivateKeyFile string `json:"ssh_private_key_file"`
SSHCertFile string `json:"ssh_cert_file"`
SSHAgentSocket string `json:"ssh_agent_socket"`
SSHHostKeys [][]byte `json:"ssh_hosts_keys"`
Bastion string `json:"bastion"`
BastionPort int `json:"bastion_port"`
BastionUser string `json:"bastion_user"`
BastionHostKey []byte `json:"bastion_host_key"`
Kubelet kubeletSpec `json:"kubelet,omitempty"`
Labels map[string]string `json:"labels"`
}
type kubeletSpec struct {
SystemReserved string `json:"system_reserved"`
KubeReserved string `json:"kube_reserved"`
EvictionHard string `json:"eviction_hard"`
MaxPods *int32 `json:"max_pods,omitempty"`
}
type hostConfigsOpts func([]kubeonev1beta2.HostConfig)
func isLeaderHostConfigsOpts(leaderIP string) hostConfigsOpts {
return func(hosts []kubeonev1beta2.HostConfig) {
if leaderIP == "" {
return
}
for i := range hosts {
hosts[i].IsLeader = leaderIP == hosts[i].PublicAddress || leaderIP == hosts[i].PrivateAddress
}
}
}
func untainerHostConfigsOpts(untaint bool) hostConfigsOpts {
return func(hosts []kubeonev1beta2.HostConfig) {
if !untaint {
return
}
for i := range hosts {
hosts[i].Taints = []corev1.Taint{}
}
}
}
func idIncrementerHostConfigsOpts(currentHostID int) hostConfigsOpts {
return func(hosts []kubeonev1beta2.HostConfig) {
for i := range hosts {
hosts[i].ID = currentHostID
currentHostID++
}
}
}
func (hs *hostsSpec) toHostConfigs(opts ...hostConfigsOpts) []kubeonev1beta2.HostConfig {
hosts := []kubeonev1beta2.HostConfig{}
for i, publicIP := range hs.PublicAddress {
privateIP := publicIP
if i < len(hs.PrivateAddress) {
privateIP = hs.PrivateAddress[i]
}
var ipv6Addr []string
if i < len(hs.IPv6Addresses) {
ipv6Addr = hs.IPv6Addresses[i]
}
hosts = append(hosts, newHostConfig(publicIP, privateIP, ipv6Addr, i, hs))
}
if len(hosts) == 0 {
// there was no public IPs available
for i, privateIP := range hs.PrivateAddress {
var ipv6Addr []string
if i < len(hs.IPv6Addresses) {
ipv6Addr = hs.IPv6Addresses[i]
}
hosts = append(hosts, newHostConfig("", privateIP, ipv6Addr, i, hs))
}
}
for _, mutatorFn := range opts {
mutatorFn(hosts)
}
return hosts
}
type cloudProviderFlags struct {
key string
value interface{}
}
// NewConfigFromJSON creates a new config object from json
func NewConfigFromJSON(buf []byte) (*Config, error) {
wholeTFOutput := struct {
KubeoneAPI interface{} `json:"kubeone_api"`
KubeoneHosts interface{} `json:"kubeone_hosts"`
KubeoneWorkers interface{} `json:"kubeone_workers"`
KubeoneStaticWorkers interface{} `json:"kubeone_static_workers"`
}{}
// cat off all the excessive fields from the terraform output JSON that will prevent otherwise strict unmarshalling
// of our known fields
if err := json.Unmarshal(buf, &wholeTFOutput); err != nil {
return nil, fail.Runtime(err, "unmarshal terraform output")
}
strictBuf, err := json.Marshal(wholeTFOutput)
if err != nil {
return nil, fail.Runtime(err, "marshal terraform output")
}
output := &Config{}
return output, fail.Runtime(unmarshalStrict(strictBuf, output), "reading terraform output")
}
// Apply adds the terraform configuration options to the given cluster config.
func (output *Config) Apply(cluster *kubeonev1beta2.KubeOneCluster) error {
if output.KubeOneAPI.Value.Endpoint != "" {
cluster.APIEndpoint.Host = output.KubeOneAPI.Value.Endpoint
}
if len(output.KubeOneAPI.Value.APIServerAlternativeNames) > 0 {
cluster.APIEndpoint.AlternativeNames = output.KubeOneAPI.Value.APIServerAlternativeNames
}
cp := output.KubeOneHosts.Value.ControlPlane
if cp.CloudProvider != nil {
cloudProvider := &kubeonev1beta2.CloudProviderSpec{}
if err := kubeonev1beta2.SetCloudProvider(cloudProvider, *cp.CloudProvider); err != nil {
return err
}
if err := mergo.Merge(&cluster.CloudProvider, cloudProvider); err != nil {
return fail.Runtime(err, "merging cloud provider structs")
}
}
cluster.Name = cp.ClusterName
idIncrementer := idIncrementerHostConfigsOpts(0)
isLeader := isLeaderHostConfigsOpts(cp.LeaderIP)
untainer := untainerHostConfigsOpts(cp.Untaint)
// build up a list of master nodes
cpHosts := cp.hostsSpec.toHostConfigs(idIncrementer, isLeader, untainer)
if len(cpHosts) > 0 {
cluster.ControlPlane.Hosts = cpHosts
}
var staticWorkerGroupNames []string
for key := range output.KubeOneStaticWorkers.Value {
staticWorkerGroupNames = append(staticWorkerGroupNames, key)
}
// avoid randomized access to the map
sort.Strings(staticWorkerGroupNames)
for _, groupName := range staticWorkerGroupNames {
staticWorkersGroup := output.KubeOneStaticWorkers.Value[groupName]
staticWorkers := staticWorkersGroup.toHostConfigs(idIncrementer)
cluster.StaticWorkers.Hosts = append(cluster.StaticWorkers.Hosts, staticWorkers...)
}
if err := mergo.Merge(&cluster.Proxy, &output.Proxy.Value); err != nil {
return fail.Runtime(err, "merging proxy settings")
}
if len(cp.NetworkID) > 0 && cluster.CloudProvider.Hetzner != nil {
// NetworkID is used only for Hetzner
cluster.CloudProvider.Hetzner.NetworkID = cp.NetworkID
}
if cluster.CloudProvider.VMwareCloudDirector != nil {
// VAppName is used only for VMware Cloud Director.
if len(cp.VAppName) > 0 {
cluster.CloudProvider.VMwareCloudDirector.VApp = cp.VAppName
} else {
cluster.CloudProvider.VMwareCloudDirector.VApp = cluster.Name
}
// Set StorageProfile.
if len(cp.StorageProfile) > 0 {
cluster.CloudProvider.VMwareCloudDirector.StorageProfile = cp.StorageProfile
}
}
// Walk through all configured workersets from terraform and apply their config
// by either merging it into an existing workerSet or creating a new one
for workersetName, workersetValue := range output.KubeOneWorkers.Value {
var existingWorkerSet *kubeonev1beta2.DynamicWorkerConfig
// Check do we have a workerset with the same name defined
// in the KubeOneCluster object
for idx, workerset := range cluster.DynamicWorkers {
if workerset.Name == workersetName {
existingWorkerSet = &cluster.DynamicWorkers[idx]
break
}
}
// If we didn't found a workerset defined in the cluster object,
// append a workerset from the terraform output to the cluster object
if existingWorkerSet == nil {
// no existing workerset found, use what we have from terraform
workersetValue.Name = workersetName
cluster.DynamicWorkers = append(cluster.DynamicWorkers, workersetValue)
continue
}
var err error
// If we found a workerset defined in the cluster object,
// merge values from the object and the terraform output
switch {
case cluster.CloudProvider.AWS != nil:
err = updateAWSWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.Azure != nil:
err = updateAzureWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.DigitalOcean != nil:
err = updateDigitalOceanWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.GCE != nil:
err = updateGCEWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.Hetzner != nil:
err = updateHetznerWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.Nutanix != nil:
err = updateNutanixWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.Openstack != nil:
err = updateOpenStackWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.EquinixMetal != nil:
err = updateEquinixMetalWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.VMwareCloudDirector != nil:
err = updateVMwareCloudDirectorWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
case cluster.CloudProvider.Vsphere != nil:
err = updateVSphereWorkerset(existingWorkerSet, workersetValue.Config.CloudProviderSpec)
default:
err = fail.Runtime(fmt.Errorf("unknown"), "checking provider")
}
if err != nil {
return err
}
}
return nil
}
func newHostConfig(publicIP, privateIP string, ipv6addr []string, idx int, spec *hostsSpec) kubeonev1beta2.HostConfig {
var hostname string
if idx < len(spec.Hostnames) {
hostname = spec.Hostnames[idx]
}
hostConfig := kubeonev1beta2.HostConfig{
Bastion: spec.Bastion,
BastionPort: spec.BastionPort,
BastionUser: spec.BastionUser,
BastionHostPublicKey: spec.BastionHostKey,
Hostname: hostname,
OperatingSystem: kubeonev1beta2.OperatingSystemName(spec.OperatingSystem),
PrivateAddress: privateIP,
PublicAddress: publicIP,
IPv6Addresses: ipv6addr,
SSHAgentSocket: spec.SSHAgentSocket,
SSHPrivateKeyFile: spec.SSHPrivateKeyFile,
SSHCertFile: spec.SSHCertFile,
SSHUsername: spec.SSHUser,
SSHPort: spec.SSHPort,
Kubelet: kubeonev1beta2.KubeletConfig{},
Labels: spec.Labels,
}
if idx < len(spec.SSHHostKeys) {
if pubKey := spec.SSHHostKeys[idx]; pubKey != nil {
hostConfig.SSHHostPublicKey = pubKey
}
}
parseKubeletResourceParams(spec.Kubelet, &hostConfig.Kubelet)
return hostConfig
}
func setWorkersetFlag(w *kubeonev1beta2.DynamicWorkerConfig, name string, value interface{}) error {
// ignore empty values (i.e. not set in terraform output)
switch s := value.(type) {
case int:
if s == 0 {
return nil
}
case *int:
if s == nil {
return nil
}
case *uint:
if s == nil {
return nil
}
case string:
if s == "" {
return nil
}
case *string:
if s == nil {
return nil
}
case []string:
if len(s) == 0 {
return nil
}
case map[string]string:
if s == nil {
return nil
}
case bool:
case *bool:
if s == nil {
return nil
}
case machinecontroller.AzureImagePlan:
case *machinecontroller.AzureImagePlan:
if s == nil {
return nil
}
default:
return fail.Runtime(fmt.Errorf("unsupported type %T %v", value, value), "reading terraform values")
}
// update CloudProviderSpec ONLY IF given terraform output is absent in
// original CloudProviderSpec
jsonSpec := make(map[string]interface{})
if w.Config.CloudProviderSpec != nil {
if err := json.Unmarshal(w.Config.CloudProviderSpec, &jsonSpec); err != nil {
return fail.Config(err, "reading CloudProviderSpec")
}
}
if _, exists := jsonSpec[name]; !exists {
jsonSpec[name] = value
}
var err error
w.Config.CloudProviderSpec, err = json.Marshal(jsonSpec)
if err != nil {
return fail.Config(err, "updating cloud provider spec")
}
return nil
}
func parseKubeletResourceParams(ks kubeletSpec, kc *kubeonev1beta2.KubeletConfig) {
if len(ks.KubeReserved) > 0 {
kc.KubeReserved = map[string]string{}
for _, krPair := range strings.Split(ks.KubeReserved, ",") {
krKV := strings.SplitN(krPair, "=", 2)
if len(krKV) != 2 {
continue
}
kc.KubeReserved[krKV[0]] = krKV[1]
}
}
if len(ks.SystemReserved) > 0 {
kc.SystemReserved = map[string]string{}
for _, srPair := range strings.Split(ks.SystemReserved, ",") {
srKV := strings.SplitN(srPair, "=", 2)
if len(srKV) != 2 {
continue
}
kc.SystemReserved[srKV[0]] = srKV[1]
}
}
if len(ks.EvictionHard) > 0 {
kc.EvictionHard = map[string]string{}
for _, ehPair := range strings.Split(ks.EvictionHard, ",") {
ehKV := strings.SplitN(ehPair, "<", 2)
if len(ehKV) != 2 {
continue
}
kc.EvictionHard[ehKV[0]] = ehKV[1]
}
}
kc.MaxPods = ks.MaxPods
}