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config.go
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config.go
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package config
//go:generate go run ../../../codegen/templates_gen.go CloudConfigController=cloud-config-controller CloudConfigWorker=cloud-config-worker CloudConfigEtcd=cloud-config-etcd DefaultClusterConfig=cluster.yaml KubeConfigTemplate=kubeconfig.tmpl StackTemplateTemplate=stack-template.json
//go:generate gofmt -w templates.go
//go:generate go run ../../../codegen/files_gen.go Etcdadm=../../../etcdadm/etcdadm
//go:generate gofmt -w files.go
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net"
"path/filepath"
"regexp"
"sort"
"strings"
"unicode/utf8"
"github.com/kubernetes-incubator/kube-aws/cfnresource"
"github.com/kubernetes-incubator/kube-aws/coreos/amiregistry"
"github.com/kubernetes-incubator/kube-aws/gzipcompressor"
"github.com/kubernetes-incubator/kube-aws/model"
"github.com/kubernetes-incubator/kube-aws/model/derived"
"github.com/kubernetes-incubator/kube-aws/netutil"
"github.com/kubernetes-incubator/kube-aws/node"
"github.com/kubernetes-incubator/kube-aws/plugin/pluginmodel"
yaml "gopkg.in/yaml.v2"
)
const (
k8sVer = "v1.8.4_coreos.0"
credentialsDir = "credentials"
userDataDir = "userdata"
)
func NewDefaultCluster() *Cluster {
experimental := Experimental{
Admission: Admission{
PodSecurityPolicy{
Enabled: false,
},
AlwaysPullImages{
Enabled: false,
},
DenyEscalatingExec{
Enabled: false,
},
Initializers{
Enabled: false,
},
},
AuditLog: AuditLog{
Enabled: false,
MaxAge: 30,
LogPath: "/var/log/kube-apiserver-audit.log",
},
Authentication: Authentication{
Webhook{
Enabled: false,
CacheTTL: "5m0s",
Config: "",
},
},
AwsEnvironment: AwsEnvironment{
Enabled: false,
},
AwsNodeLabels: AwsNodeLabels{
Enabled: false,
},
ClusterAutoscalerSupport: model.ClusterAutoscalerSupport{
Enabled: true,
},
TLSBootstrap: TLSBootstrap{
Enabled: false,
},
NodeAuthorizer: NodeAuthorizer{
Enabled: false,
},
EphemeralImageStorage: EphemeralImageStorage{
Enabled: false,
Disk: "xvdb",
Filesystem: "xfs",
},
Kube2IamSupport: Kube2IamSupport{
Enabled: false,
},
KubeletOpts: "",
LoadBalancer: LoadBalancer{
Enabled: false,
},
TargetGroup: TargetGroup{
Enabled: false,
},
NodeDrainer: model.NodeDrainer{
Enabled: false,
DrainTimeout: 5,
},
Oidc: model.Oidc{
Enabled: false,
IssuerUrl: "https://accounts.google.com",
ClientId: "kubernetes",
UsernameClaim: "email",
GroupsClaim: "groups",
},
}
return &Cluster{
DeploymentSettings: DeploymentSettings{
ClusterName: "kubernetes",
VPCCIDR: "10.0.0.0/16",
ReleaseChannel: "stable",
K8sVer: k8sVer,
ContainerRuntime: "docker",
Subnets: []model.Subnet{},
EIPAllocationIDs: []string{},
Experimental: experimental,
ManageCertificates: true,
AmazonSsmAgent: AmazonSsmAgent{
Enabled: false,
DownloadUrl: "",
Sha1Sum: "",
},
CloudWatchLogging: CloudWatchLogging{
Enabled: false,
RetentionInDays: 7,
LocalStreaming: LocalStreaming{
Enabled: true,
Filter: `{ $.priority = "CRIT" || $.priority = "WARNING" && $.transport = "journal" && $.systemdUnit = "init.scope" }`,
interval: 60,
},
},
KubeDns: KubeDns{
NodeLocalResolver: false,
},
KubernetesDashboard: KubernetesDashboard{
AdminPrivileges: true,
InsecureLogin: false,
},
CloudFormationStreaming: true,
HyperkubeImage: model.Image{Repo: "quay.io/coreos/hyperkube", Tag: k8sVer, RktPullDocker: false},
AWSCliImage: model.Image{Repo: "quay.io/coreos/awscli", Tag: "master", RktPullDocker: false},
CalicoNodeImage: model.Image{Repo: "quay.io/calico/node", Tag: "v2.6.1", RktPullDocker: false},
CalicoCniImage: model.Image{Repo: "quay.io/calico/cni", Tag: "v1.11.0", RktPullDocker: false},
CalicoKubeControllersImage: model.Image{Repo: "quay.io/calico/kube-controllers", Tag: "v1.0.0", RktPullDocker: false},
CalicoCtlImage: model.Image{Repo: "quay.io/calico/ctl", Tag: "v1.6.1", RktPullDocker: false},
ClusterAutoscalerImage: model.Image{Repo: "gcr.io/google_containers/cluster-autoscaler", Tag: "v1.0.3", RktPullDocker: false},
ClusterProportionalAutoscalerImage: model.Image{Repo: "gcr.io/google_containers/cluster-proportional-autoscaler-amd64", Tag: "1.1.2", RktPullDocker: false},
Kube2IAMImage: model.Image{Repo: "jtblin/kube2iam", Tag: "0.8.1", RktPullDocker: false},
KubeDnsImage: model.Image{Repo: "gcr.io/google_containers/k8s-dns-kube-dns-amd64", Tag: "1.14.7", RktPullDocker: false},
KubeDnsMasqImage: model.Image{Repo: "gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64", Tag: "1.14.7", RktPullDocker: false},
KubeReschedulerImage: model.Image{Repo: "gcr.io/google-containers/rescheduler", Tag: "v0.3.1", RktPullDocker: false},
DnsMasqMetricsImage: model.Image{Repo: "gcr.io/google_containers/k8s-dns-sidecar-amd64", Tag: "1.14.6", RktPullDocker: false},
ExecHealthzImage: model.Image{Repo: "gcr.io/google_containers/exechealthz-amd64", Tag: "1.2", RktPullDocker: false},
HelmImage: model.Image{Repo: "quay.io/kube-aws/helm", Tag: "v2.6.0", RktPullDocker: false},
TillerImage: model.Image{Repo: "gcr.io/kubernetes-helm/tiller", Tag: "v2.7.2", RktPullDocker: false},
HeapsterImage: model.Image{Repo: "gcr.io/google_containers/heapster", Tag: "v1.4.3", RktPullDocker: false},
MetricsServerImage: model.Image{Repo: "gcr.io/google_containers/metrics-server-amd64", Tag: "v0.2.0", RktPullDocker: false},
AddonResizerImage: model.Image{Repo: "gcr.io/google_containers/addon-resizer", Tag: "2.1", RktPullDocker: false},
KubernetesDashboardImage: model.Image{Repo: "gcr.io/google_containers/kubernetes-dashboard-amd64", Tag: "v1.8.0", RktPullDocker: false},
PauseImage: model.Image{Repo: "gcr.io/google_containers/pause-amd64", Tag: "3.0", RktPullDocker: false},
FlannelImage: model.Image{Repo: "quay.io/coreos/flannel", Tag: "v0.9.0", RktPullDocker: false},
JournaldCloudWatchLogsImage: model.Image{Repo: "jollinshead/journald-cloudwatch-logs", Tag: "0.1", RktPullDocker: true},
},
KubeClusterSettings: KubeClusterSettings{
DNSServiceIP: "10.3.0.10",
},
DefaultWorkerSettings: DefaultWorkerSettings{
WorkerCreateTimeout: "PT15M",
WorkerInstanceType: "t2.medium",
WorkerRootVolumeType: "gp2",
WorkerRootVolumeIOPS: 0,
WorkerRootVolumeSize: 30,
WorkerSecurityGroupIds: []string{},
WorkerTenancy: "default",
},
ControllerSettings: ControllerSettings{
Controller: model.NewDefaultController(),
},
EtcdSettings: EtcdSettings{
Etcd: model.NewDefaultEtcd(),
},
FlannelSettings: FlannelSettings{
PodCIDR: "10.2.0.0/16",
},
// for kube-apiserver
ServiceCIDR: "10.3.0.0/24",
// for base cloudformation stack
TLSCADurationDays: 365 * 10,
TLSCertDurationDays: 365,
RecordSetTTL: 300,
SSHAccessAllowedSourceCIDRs: model.DefaultCIDRRanges(),
CustomSettings: make(map[string]interface{}),
KubeResourcesAutosave: KubeResourcesAutosave{
Enabled: false,
},
}
}
func ClusterFromFile(filename string) (*Cluster, error) {
data, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
c, err := ClusterFromBytes(data)
if err != nil {
return nil, fmt.Errorf("file %s: %v", filename, err)
}
return c, nil
}
// ClusterFromBytes Necessary for unit tests, which store configs as hardcoded strings
func ClusterFromBytes(data []byte) (*Cluster, error) {
c := NewDefaultCluster()
if err := yaml.Unmarshal(data, c); err != nil {
return nil, fmt.Errorf("failed to parse cluster: %v", err)
}
c.HyperkubeImage.Tag = c.K8sVer
if err := c.Load(); err != nil {
return nil, err
}
return c, nil
}
func ConfigFromBytes(data []byte) (*Config, error) {
c, err := ClusterFromBytes(data)
if err != nil {
return nil, err
}
cfg, err := c.Config([]*pluginmodel.Plugin{})
if err != nil {
return nil, err
}
return cfg, nil
}
func (c *Cluster) Load() error {
// If the user specified no subnets, we assume that a single AZ configuration with the default instanceCIDR is demanded
if len(c.Subnets) == 0 && c.InstanceCIDR == "" {
c.InstanceCIDR = "10.0.0.0/24"
}
c.HostedZoneID = withHostedZoneIDPrefix(c.HostedZoneID)
c.ConsumeDeprecatedKeys()
if err := c.validate(); err != nil {
return fmt.Errorf("invalid cluster: %v", err)
}
if err := c.SetDefaults(); err != nil {
return fmt.Errorf("invalid cluster: %v", err)
}
if c.ExternalDNSName != "" {
// TODO: Deprecate externalDNSName?
if len(c.APIEndpointConfigs) != 0 {
return errors.New("invalid cluster: you can only specify either externalDNSName or apiEndpoints, but not both")
}
subnetRefs := []model.SubnetReference{}
for _, s := range c.Controller.LoadBalancer.Subnets {
subnetRefs = append(subnetRefs, model.SubnetReference{Name: s.Name})
}
c.APIEndpointConfigs = model.NewDefaultAPIEndpoints(
c.ExternalDNSName,
subnetRefs,
c.HostedZoneID,
c.RecordSetTTL,
c.Controller.LoadBalancer.Private,
)
}
return nil
}
func (c *Cluster) ConsumeDeprecatedKeys() {
// TODO Remove in v0.9.9-rc.1
if c.DeprecatedVPCID != "" {
fmt.Println("WARN: vpcId is deprecated and will be removed in v0.9.9. Please use vpc.id instead")
c.VPC.ID = c.DeprecatedVPCID
}
if c.DeprecatedInternetGatewayID != "" {
fmt.Println("WARN: internetGatewayId is deprecated and will be removed in v0.9.9. Please use internetGateway.id instead")
c.InternetGateway.ID = c.DeprecatedInternetGatewayID
}
}
func (c *Cluster) SetDefaults() error {
// For backward-compatibility
if len(c.Subnets) == 0 {
c.Subnets = []model.Subnet{
model.NewPublicSubnet(c.AvailabilityZone, c.InstanceCIDR),
}
}
for i, s := range c.Subnets {
if s.Name == "" {
c.Subnets[i].Name = fmt.Sprintf("Subnet%d", i)
}
}
for i, s := range c.Controller.Subnets {
linkedSubnet := c.FindSubnetMatching(s)
c.Controller.Subnets[i] = linkedSubnet
}
for i, s := range c.Controller.LoadBalancer.Subnets {
linkedSubnet := c.FindSubnetMatching(s)
c.Controller.LoadBalancer.Subnets[i] = linkedSubnet
}
for i, s := range c.Etcd.Subnets {
linkedSubnet := c.FindSubnetMatching(s)
c.Etcd.Subnets[i] = linkedSubnet
}
if len(c.Controller.Subnets) == 0 {
c.Controller.Subnets = c.PublicSubnets()
if len(c.Controller.Subnets) == 0 {
return errors.New("`controller.subnets` in cluster.yaml defaults to include only public subnets defined under `subnets`. However, there was no public subnet for that. Please define one or more public subnets under `subnets` or set `controller.subnets`.")
}
} else if c.Controller.Subnets.ContainsBothPrivateAndPublic() {
return errors.New("You can not mix private and public subnets for controller nodes. Please explicitly configure controller.subnets[] to contain either public or private subnets only")
}
if len(c.Controller.LoadBalancer.Subnets) == 0 {
if c.Controller.LoadBalancer.Private {
c.Controller.LoadBalancer.Subnets = c.PrivateSubnets()
c.Controller.LoadBalancer.Private = true
} else {
c.Controller.LoadBalancer.Subnets = c.PublicSubnets()
}
}
if len(c.Etcd.Subnets) == 0 {
c.Etcd.Subnets = c.PublicSubnets()
if len(c.Etcd.Subnets) == 0 {
return errors.New("`etcd.subnets` in cluster.yaml defaults to include only public subnets defined under `subnets`. However, there was no public subnet for that. Please define one or more public subnets under `subnets` or set `etcd.subnets`.")
}
} else if c.Etcd.Subnets.ContainsBothPrivateAndPublic() {
return fmt.Errorf("You can not mix private and public subnets for etcd nodes. Please explicitly configure etcd.subnets[] to contain either public or private subnets only")
}
return nil
}
func ClusterFromBytesWithEncryptService(data []byte, encryptService EncryptService) (*Cluster, error) {
cluster, err := ClusterFromBytes(data)
if err != nil {
return nil, err
}
cluster.ProvidedEncryptService = encryptService
return cluster, nil
}
// Part of configuration which is shared between controller nodes and worker nodes.
// Its name is prefixed with `Kube` because it doesn't relate to etcd.
type KubeClusterSettings struct {
APIEndpointConfigs model.APIEndpoints `yaml:"apiEndpoints,omitempty"`
// Required by kubelet to locate the kube-apiserver
ExternalDNSName string `yaml:"externalDNSName,omitempty"`
// Required by kubelet to locate the cluster-internal dns hosted on controller nodes in the base cluster
DNSServiceIP string `yaml:"dnsServiceIP,omitempty"`
UseCalico bool `yaml:"useCalico,omitempty"`
}
// Part of configuration which can't be provided via user input but is computed from user input
type ComputedDeploymentSettings struct {
AMI string
}
// Part of configuration which can be customized for each type/group of nodes(etcd/controller/worker/) by its nature.
//
// Please beware that it is described as just "by its nature".
// Whether it can actually be customized or not depends on you use node pools or not.
// If you've chosen to create a single cluster including all the worker, controller, etcd nodes within a single cfn stack,
// you can't customize per group of nodes.
// If you've chosen to create e.g. a separate node pool for each type of worker nodes,
// you can customize per node pool.
//
// Though it is highly configurable, it's basically users' responsibility to provide `correct` values if they're going beyond the defaults.
type DeploymentSettings struct {
ComputedDeploymentSettings
ClusterName string `yaml:"clusterName,omitempty"`
KeyName string `yaml:"keyName,omitempty"`
Region model.Region `yaml:",inline"`
AvailabilityZone string `yaml:"availabilityZone,omitempty"`
ReleaseChannel string `yaml:"releaseChannel,omitempty"`
AmiId string `yaml:"amiId,omitempty"`
DeprecatedVPCID string `yaml:"vpcId,omitempty"`
VPC model.VPC `yaml:"vpc,omitempty"`
DeprecatedInternetGatewayID string `yaml:"internetGatewayId,omitempty"`
InternetGateway model.InternetGateway `yaml:"internetGateway,omitempty"`
// Required for validations like e.g. if instance cidr is contained in vpc cidr
VPCCIDR string `yaml:"vpcCIDR,omitempty"`
InstanceCIDR string `yaml:"instanceCIDR,omitempty"`
K8sVer string `yaml:"kubernetesVersion,omitempty"`
ContainerRuntime string `yaml:"containerRuntime,omitempty"`
KMSKeyARN string `yaml:"kmsKeyArn,omitempty"`
StackTags map[string]string `yaml:"stackTags,omitempty"`
Subnets model.Subnets `yaml:"subnets,omitempty"`
EIPAllocationIDs []string `yaml:"eipAllocationIDs,omitempty"`
ElasticFileSystemID string `yaml:"elasticFileSystemId,omitempty"`
SharedPersistentVolume bool `yaml:"sharedPersistentVolume,omitempty"`
SSHAuthorizedKeys []string `yaml:"sshAuthorizedKeys,omitempty"`
Addons model.Addons `yaml:"addons"`
Experimental Experimental `yaml:"experimental"`
ManageCertificates bool `yaml:"manageCertificates,omitempty"`
WaitSignal WaitSignal `yaml:"waitSignal"`
CloudWatchLogging `yaml:"cloudWatchLogging,omitempty"`
AmazonSsmAgent `yaml:"amazonSsmAgent,omitempty"`
CloudFormationStreaming bool `yaml:"cloudFormationStreaming,omitempty"`
KubeDns `yaml:"kubeDns,omitempty"`
KubernetesDashboard `yaml:"kubernetesDashboard,omitempty"`
// Images repository
HyperkubeImage model.Image `yaml:"hyperkubeImage,omitempty"`
AWSCliImage model.Image `yaml:"awsCliImage,omitempty"`
CalicoNodeImage model.Image `yaml:"calicoNodeImage,omitempty"`
CalicoCniImage model.Image `yaml:"calicoCniImage,omitempty"`
CalicoCtlImage model.Image `yaml:"calicoCtlImage,omitempty"`
CalicoKubeControllersImage model.Image `yaml:"calicoKubeControllersImage,omitempty"`
ClusterAutoscalerImage model.Image `yaml:"clusterAutoscalerImage,omitempty"`
ClusterProportionalAutoscalerImage model.Image `yaml:"clusterProportionalAutoscalerImage,omitempty"`
Kube2IAMImage model.Image `yaml:"kube2iamImage,omitempty"`
KubeDnsImage model.Image `yaml:"kubeDnsImage,omitempty"`
KubeDnsMasqImage model.Image `yaml:"kubeDnsMasqImage,omitempty"`
KubeReschedulerImage model.Image `yaml:"kubeReschedulerImage,omitempty"`
DnsMasqMetricsImage model.Image `yaml:"dnsMasqMetricsImage,omitempty"`
ExecHealthzImage model.Image `yaml:"execHealthzImage,omitempty"`
HelmImage model.Image `yaml:"helmImage,omitempty"`
TillerImage model.Image `yaml:"tillerImage,omitempty"`
HeapsterImage model.Image `yaml:"heapsterImage,omitempty"`
MetricsServerImage model.Image `yaml:"metricsServerImage,omitempty"`
AddonResizerImage model.Image `yaml:"addonResizerImage,omitempty"`
KubernetesDashboardImage model.Image `yaml:"kubernetesDashboardImage,omitempty"`
PauseImage model.Image `yaml:"pauseImage,omitempty"`
FlannelImage model.Image `yaml:"flannelImage,omitempty"`
JournaldCloudWatchLogsImage model.Image `yaml:"journaldCloudWatchLogsImage,omitempty"`
}
// Part of configuration which is specific to worker nodes
type DefaultWorkerSettings struct {
WorkerCreateTimeout string `yaml:"workerCreateTimeout,omitempty"`
WorkerInstanceType string `yaml:"workerInstanceType,omitempty"`
WorkerRootVolumeType string `yaml:"workerRootVolumeType,omitempty"`
WorkerRootVolumeIOPS int `yaml:"workerRootVolumeIOPS,omitempty"`
WorkerRootVolumeSize int `yaml:"workerRootVolumeSize,omitempty"`
WorkerSpotPrice string `yaml:"workerSpotPrice,omitempty"`
WorkerSecurityGroupIds []string `yaml:"workerSecurityGroupIds,omitempty"`
WorkerTenancy string `yaml:"workerTenancy,omitempty"`
WorkerTopologyPrivate bool `yaml:"workerTopologyPrivate,omitempty"`
}
// Part of configuration which is specific to controller nodes
type ControllerSettings struct {
model.Controller `yaml:"controller,omitempty"`
}
// Part of configuration which is specific to etcd nodes
type EtcdSettings struct {
model.Etcd `yaml:"etcd,omitempty"`
}
// Part of configuration which is specific to flanneld
type FlannelSettings struct {
PodCIDR string `yaml:"podCIDR,omitempty"`
}
// Cluster is the container of all the configurable parameters of a kube-aws cluster, customizable via cluster.yaml
type Cluster struct {
KubeClusterSettings `yaml:",inline"`
DeploymentSettings `yaml:",inline"`
DefaultWorkerSettings `yaml:",inline"`
ControllerSettings `yaml:",inline"`
EtcdSettings `yaml:",inline"`
FlannelSettings `yaml:",inline"`
AdminAPIEndpointName string `yaml:"adminAPIEndpointName,omitempty"`
ServiceCIDR string `yaml:"serviceCIDR,omitempty"`
RecordSetTTL int `yaml:"recordSetTTL,omitempty"`
TLSCADurationDays int `yaml:"tlsCADurationDays,omitempty"`
TLSCertDurationDays int `yaml:"tlsCertDurationDays,omitempty"`
HostedZoneID string `yaml:"hostedZoneId,omitempty"`
PluginConfigs model.PluginConfigs `yaml:"kubeAwsPlugins,omitempty"`
ProvidedEncryptService EncryptService
// SSHAccessAllowedSourceCIDRs is network ranges of sources you'd like SSH accesses to be allowed from, in CIDR notation
SSHAccessAllowedSourceCIDRs model.CIDRRanges `yaml:"sshAccessAllowedSourceCIDRs,omitempty"`
CustomSettings map[string]interface{} `yaml:"customSettings,omitempty"`
KubeResourcesAutosave `yaml:"kubeResourcesAutosave,omitempty"`
}
type Experimental struct {
Admission Admission `yaml:"admission"`
AuditLog AuditLog `yaml:"auditLog"`
Authentication Authentication `yaml:"authentication"`
AwsEnvironment AwsEnvironment `yaml:"awsEnvironment"`
AwsNodeLabels AwsNodeLabels `yaml:"awsNodeLabels"`
// When cluster-autoscaler support is enabled, not only controller nodes but this node pool is also given
// a node label and IAM permissions to run cluster-autoscaler
ClusterAutoscalerSupport model.ClusterAutoscalerSupport `yaml:"clusterAutoscalerSupport"`
TLSBootstrap TLSBootstrap `yaml:"tlsBootstrap"`
NodeAuthorizer NodeAuthorizer `yaml:"nodeAuthorizer"`
EphemeralImageStorage EphemeralImageStorage `yaml:"ephemeralImageStorage"`
Kube2IamSupport Kube2IamSupport `yaml:"kube2IamSupport,omitempty"`
KubeletOpts string `yaml:"kubeletOpts,omitempty"`
LoadBalancer LoadBalancer `yaml:"loadBalancer"`
TargetGroup TargetGroup `yaml:"targetGroup"`
NodeDrainer model.NodeDrainer `yaml:"nodeDrainer"`
Oidc model.Oidc `yaml:"oidc"`
DisableSecurityGroupIngress bool `yaml:"disableSecurityGroupIngress"`
NodeMonitorGracePeriod string `yaml:"nodeMonitorGracePeriod"`
model.UnknownKeys `yaml:",inline"`
}
type Admission struct {
PodSecurityPolicy PodSecurityPolicy `yaml:"podSecurityPolicy"`
AlwaysPullImages AlwaysPullImages `yaml:"alwaysPullImages"`
DenyEscalatingExec DenyEscalatingExec `yaml:"denyEscalatingExec"`
Initializers Initializers `yaml:"initializers"`
}
type AlwaysPullImages struct {
Enabled bool `yaml:"enabled"`
}
type PodSecurityPolicy struct {
Enabled bool `yaml:"enabled"`
}
type DenyEscalatingExec struct {
Enabled bool `yaml:"enabled"`
}
type Initializers struct {
Enabled bool `yaml:"enabled"`
}
type AuditLog struct {
Enabled bool `yaml:"enabled"`
MaxAge int `yaml:"maxage"`
LogPath string `yaml:"logpath"`
}
type Authentication struct {
Webhook Webhook `yaml:"webhook"`
}
type Webhook struct {
Enabled bool `yaml:"enabled"`
CacheTTL string `yaml:"cacheTTL"`
Config string `yaml:"configBase64"`
}
type AwsEnvironment struct {
Enabled bool `yaml:"enabled"`
Environment map[string]string `yaml:"environment"`
}
type AwsNodeLabels struct {
Enabled bool `yaml:"enabled"`
}
type TLSBootstrap struct {
Enabled bool `yaml:"enabled"`
}
type NodeAuthorizer struct {
Enabled bool `yaml:"enabled"`
}
type EphemeralImageStorage struct {
Enabled bool `yaml:"enabled"`
Disk string `yaml:"disk"`
Filesystem string `yaml:"filesystem"`
}
type Kube2IamSupport struct {
Enabled bool `yaml:"enabled"`
}
type KubeResourcesAutosave struct {
Enabled bool `yaml:"enabled"`
S3Path string
}
type AmazonSsmAgent struct {
Enabled bool `yaml:"enabled"`
DownloadUrl string `yaml:"downloadUrl"`
Sha1Sum string `yaml:"sha1sum"`
}
type CloudWatchLogging struct {
Enabled bool `yaml:"enabled"`
RetentionInDays int `yaml:"retentionInDays"`
LocalStreaming `yaml:"localStreaming"`
}
type LocalStreaming struct {
Enabled bool `yaml:"enabled"`
Filter string `yaml:"filter"`
interval int `yaml:"interval"`
}
func (c *LocalStreaming) Interval() int64 {
// Convert from seconds to milliseconds (and return as int64 type)
return int64(c.interval * 1000)
}
func (c *CloudWatchLogging) MergeIfEmpty(other CloudWatchLogging) {
if c.Enabled == false && c.RetentionInDays == 0 {
c.Enabled = other.Enabled
c.RetentionInDays = other.RetentionInDays
}
}
type LoadBalancer struct {
Enabled bool `yaml:"enabled"`
Names []string `yaml:"names"`
SecurityGroupIds []string `yaml:"securityGroupIds"`
}
type TargetGroup struct {
Enabled bool `yaml:"enabled"`
Arns []string `yaml:"arns"`
SecurityGroupIds []string `yaml:"securityGroupIds"`
}
type KubeDns struct {
NodeLocalResolver bool `yaml:"nodeLocalResolver"`
}
func (c *KubeDns) MergeIfEmpty(other KubeDns) {
if c.NodeLocalResolver == false {
c.NodeLocalResolver = other.NodeLocalResolver
}
}
type KubernetesDashboard struct {
AdminPrivileges bool `yaml:"adminPrivileges"`
InsecureLogin bool `yaml:"insecureLogin"`
}
type WaitSignal struct {
// WaitSignal is enabled by default. If you'd like to explicitly disable it, set this to `false`.
// Keeping this `nil` results in the WaitSignal to be enabled.
EnabledOverride *bool `yaml:"enabled"`
MaxBatchSizeOverride *int `yaml:"maxBatchSize"`
}
func (s WaitSignal) Enabled() bool {
if s.EnabledOverride != nil {
return *s.EnabledOverride
}
return true
}
func (s WaitSignal) MaxBatchSize() int {
if s.MaxBatchSizeOverride != nil {
return *s.MaxBatchSizeOverride
}
return 1
}
const (
vpcLogicalName = "VPC"
internetGatewayLogicalName = "InternetGateway"
)
var supportedReleaseChannels = map[string]bool{
"alpha": true,
"beta": true,
"stable": true,
}
func (c ControllerSettings) MinControllerCount() int {
if c.Controller.AutoScalingGroup.MinSize == nil {
return c.Controller.Count
}
return *c.Controller.AutoScalingGroup.MinSize
}
func (c ControllerSettings) MaxControllerCount() int {
if c.Controller.AutoScalingGroup.MaxSize == 0 {
return c.Controller.Count
}
return c.Controller.AutoScalingGroup.MaxSize
}
func (c ControllerSettings) ControllerRollingUpdateMinInstancesInService() int {
if c.AutoScalingGroup.RollingUpdateMinInstancesInService == nil {
return c.MaxControllerCount() - 1
}
return *c.AutoScalingGroup.RollingUpdateMinInstancesInService
}
// AdminAPIEndpointURL is the url of the API endpoint which is written in kubeconfig and used to by admins
func (c *Config) AdminAPIEndpointURL() string {
return fmt.Sprintf("https://%s", c.AdminAPIEndpoint.DNSName)
}
// Required by kubelet to use the consistent network plugin with the base cluster
func (c KubeClusterSettings) K8sNetworkPlugin() string {
return "cni"
}
func (c Cluster) Config(extra ...[]*pluginmodel.Plugin) (*Config, error) {
pluginMap := map[string]*pluginmodel.Plugin{}
plugins := []*pluginmodel.Plugin{}
if len(extra) > 0 {
plugins = extra[0]
for _, p := range plugins {
pluginMap[p.SettingKey()] = p
}
}
config := Config{
Cluster: c,
KubeAwsPlugins: pluginMap,
APIServerFlags: pluginmodel.APIServerFlags{},
APIServerVolumes: pluginmodel.APIServerVolumes{},
}
if c.AmiId == "" {
var err error
if config.AMI, err = amiregistry.GetAMI(config.Region.String(), config.ReleaseChannel); err != nil {
return nil, fmt.Errorf("failed getting AMI for config: %v", err)
}
} else {
config.AMI = c.AmiId
}
var err error
config.EtcdNodes, err = derived.NewEtcdNodes(c.Etcd.Nodes, c.EtcdCluster())
if err != nil {
return nil, fmt.Errorf("failed to derived etcd nodes configuration: %v", err)
}
// Populate top-level subnets to model
if len(config.Subnets) > 0 {
if config.ControllerSettings.MinControllerCount() > 0 && len(config.ControllerSettings.Subnets) == 0 {
config.ControllerSettings.Subnets = config.Subnets
}
}
apiEndpoints, err := derived.NewAPIEndpoints(c.APIEndpointConfigs, c.Subnets)
if err != nil {
return nil, fmt.Errorf("invalid cluster: %v", err)
}
config.APIEndpoints = apiEndpoints
apiEndpointNames := []string{}
for _, e := range apiEndpoints {
apiEndpointNames = append(apiEndpointNames, e.Name)
}
var adminAPIEndpoint derived.APIEndpoint
if c.AdminAPIEndpointName != "" {
found, err := apiEndpoints.FindByName(c.AdminAPIEndpointName)
if err != nil {
return nil, fmt.Errorf("failed to find an API endpoint named \"%s\": %v", c.AdminAPIEndpointName, err)
}
adminAPIEndpoint = *found
} else {
if len(apiEndpoints) > 1 {
return nil, fmt.Errorf(
"adminAPIEndpointName must not be empty when there's 2 or more api endpoints under the key `apiEndpoints`. Specify one of: %s",
strings.Join(apiEndpointNames, ", "),
)
}
adminAPIEndpoint = apiEndpoints.GetDefault()
}
config.AdminAPIEndpoint = adminAPIEndpoint
return &config, nil
}
func (c *Cluster) EtcdCluster() derived.EtcdCluster {
etcdNetwork := derived.NewNetwork(c.Etcd.Subnets, c.NATGateways())
return derived.NewEtcdCluster(c.Etcd.Cluster, c.Region, etcdNetwork, c.Etcd.Count)
}
type StackTemplateOptions struct {
AssetsDir string
ControllerTmplFile string
EtcdTmplFile string
StackTemplateTmplFile string
S3URI string
PrettyPrint bool
SkipWait bool
}
func (c Cluster) StackConfig(opts StackTemplateOptions, extra ...[]*pluginmodel.Plugin) (*StackConfig, error) {
plugins := []*pluginmodel.Plugin{}
if len(extra) > 0 {
plugins = extra[0]
}
var err error
stackConfig := StackConfig{
ExtraCfnResources: map[string]interface{}{},
}
if stackConfig.Config, err = c.Config(plugins); err != nil {
return nil, err
}
var compactAssets *CompactAssets
if c.AssetsEncryptionEnabled() {
compactAssets, err = ReadOrCreateCompactAssets(opts.AssetsDir, c.ManageCertificates, c.Experimental.TLSBootstrap.Enabled, KMSConfig{
Region: stackConfig.Config.Region,
KMSKeyARN: c.KMSKeyARN,
EncryptService: c.ProvidedEncryptService,
})
if err != nil {
return nil, err
}
stackConfig.Config.AssetsConfig = compactAssets
} else {
rawAssets, err := ReadOrCreateUnencryptedCompactAssets(opts.AssetsDir, c.ManageCertificates, c.Experimental.TLSBootstrap.Enabled)
if err != nil {
return nil, err
}
stackConfig.Config.AssetsConfig = rawAssets
}
stackConfig.StackTemplateOptions = opts
stackConfig.S3URI = strings.TrimSuffix(opts.S3URI, "/")
if opts.SkipWait {
enabled := false
stackConfig.WaitSignal.EnabledOverride = &enabled
}
return &stackConfig, nil
}
type InitialConfig struct {
AmiId string
AvailabilityZone string
ClusterName string
ExternalDNSName string
HostedZoneID string
KMSKeyARN string
KeyName string
NoRecordSet bool
Region model.Region
}
// Config contains configuration parameters available when rendering userdata injected into a controller or an etcd node from golang text templates
type Config struct {
Cluster
AdminAPIEndpoint derived.APIEndpoint
APIEndpoints derived.APIEndpoints
// EtcdNodes is the golang-representation of etcd nodes, which is used to differentiate unique etcd nodes
// This is used to simplify templating of the control-plane stack template.
EtcdNodes []derived.EtcdNode
AssetsConfig *CompactAssets
KubeAwsPlugins map[string]*pluginmodel.Plugin
APIServerVolumes pluginmodel.APIServerVolumes
APIServerFlags pluginmodel.APIServerFlags
}
// StackName returns the logical name of a CloudFormation stack resource in a root stack template
// This is not needed to be unique in an AWS account because the actual name of a nested stack is generated randomly
// by CloudFormation by including the logical name.
// This is NOT intended to be used to reference stack name from cloud-config as the target of awscli or cfn-bootstrap-tools commands e.g. `cfn-init` and `cfn-signal`
func (c Cluster) StackName() string {
return "control-plane"
}
func (c Cluster) StackNameEnvVarName() string {
return "KUBE_AWS_STACK_NAME"
}
func (c Cluster) EtcdNodeEnvFileName() string {
return "/var/run/coreos/etcd-node.env"
}
func (c Cluster) EtcdIndexEnvVarName() string {
return "KUBE_AWS_ETCD_INDEX"
}
func (c Config) VPCLogicalName() (string, error) {
if c.VPC.HasIdentifier() {
return "", fmt.Errorf("[BUG] .VPCLogicalName should not be called in stack template when vpc id is specified")
}
return vpcLogicalName, nil
}
func (c Config) VPCID() (string, error) {
fmt.Println("WARN: .VPCID in stack template is deprecated and will be removed in v0.9.9. Please use .VPC.ID instead")
if !c.VPC.HasIdentifier() {
return "", fmt.Errorf("[BUG] .VPCID should not be called in stack template when vpc.id(FromStackOutput) is specified. Use .VPCManaged instead.")
}
return c.VPC.ID, nil
}
func (c Config) VPCManaged() bool {
return !c.VPC.HasIdentifier()
}
func (c Config) VPCRef() (string, error) {
return c.VPC.RefOrError(c.VPCLogicalName)
}
func (c Config) InternetGatewayLogicalName() string {
return internetGatewayLogicalName
}
func (c Config) InternetGatewayRef() string {
return c.InternetGateway.Ref(c.InternetGatewayLogicalName)
}
// ExternalDNSNames returns all the DNS names of Kubernetes API endpoints should be covered in the TLS cert for k8s API
func (c Cluster) ExternalDNSNames() []string {
names := []string{}
if c.ExternalDNSName != "" {
names = append(names, c.ExternalDNSName)
}
for _, e := range c.APIEndpointConfigs {
names = append(names, e.DNSName)
}
sort.Strings(names)
return names
}
// APIAccessAllowedSourceCIDRsForControllerSG returns all the CIDRs of Kubernetes API endpoints that controller nodes must allow access from
func (c Cluster) APIAccessAllowedSourceCIDRsForControllerSG() []string {
cidrs := []string{}
seen := map[string]bool{}
for _, e := range c.APIEndpointConfigs {
if !e.LoadBalancer.NetworkLoadBalancer() {
continue
}
ranges := e.LoadBalancer.APIAccessAllowedSourceCIDRs
if len(ranges) > 0 {
for _, r := range ranges {
val := r.String()
if _, ok := seen[val]; !ok {
cidrs = append(cidrs, val)
seen[val] = true
}
}
}
}
sort.Strings(cidrs)
return cidrs
}
// NestedStackName returns a sanitized name of this control-plane which is usable as a valid cloudformation nested stack name
func (c Cluster) NestedStackName() string {
// Convert stack name into something valid as a cfn resource name or
// we'll end up with cfn errors like "Template format error: Resource name test5-controlplane is non alphanumeric"
return strings.Title(strings.Replace(c.StackName(), "-", "", -1))
}
func (c Cluster) NodeLabels() model.NodeLabels {
labels := c.NodeSettings.NodeLabels
if c.Addons.ClusterAutoscaler.Enabled {
labels["kube-aws.coreos.com/cluster-autoscaler-supported"] = "true"
}
return labels
}
// Etcdadm returns the content of the etcdadm script to be embedded into cloud-config-etcd
func (c *Config) Etcdadm() (string, error) {
return gzipcompressor.CompressData(Etcdadm)
}
func (c Cluster) validate() error {
validClusterNaming := regexp.MustCompile("^[a-zA-Z0-9-:]+$")