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fix: honor the extraArgs option for the kubelet

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This allows users to supply extra arguments for the kubelet.

Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>
This commit is contained in:
Andrew Rynhard 2019-11-14 14:30:28 +00:00
parent bb89d908b3
commit 82c59368af
6 changed files with 80 additions and 36 deletions
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10
internal/app/machined/pkg/system/services/etcd.go
View File

@ -92,7 +92,7 @@ func (e *Etcd) DependsOn(config runtime.Configurator) []string {
// Runner implements the Service interface.
func (e *Etcd) Runner(config runtime.Configurator) (runner.Runner, error) {
a, err := args(config)
a, err := e.args(config)
if err != nil {
return nil, err
}
@ -318,12 +318,8 @@ func buildInitialCluster(config runtime.Configurator, name, ip string) (initial
return initial, nil
}
func blacklistError(s string) error {
return fmt.Errorf("extra etcd arg %q is not allowed", s)
}
// nolint: gocyclo
func args(config runtime.Configurator) ([]string, error) {
func (e *Etcd) args(config runtime.Configurator) ([]string, error) {
hostname, err := os.Hostname()
if err != nil {
return nil, err
@ -362,7 +358,7 @@ func args(config runtime.Configurator) ([]string, error) {
for k := range blackListArgs {
if extraArgs.Contains(k) {
return nil, blacklistError(k)
return nil, argsbuilder.NewBlacklistError(k)
}
}

72
internal/app/machined/pkg/system/services/kubelet.go
View File

@ -30,6 +30,7 @@ import (
"github.com/talos-systems/talos/internal/app/machined/pkg/system/runner/containerd"
"github.com/talos-systems/talos/internal/app/machined/pkg/system/runner/restart"
"github.com/talos-systems/talos/internal/pkg/runtime"
"github.com/talos-systems/talos/pkg/argsbuilder"
"github.com/talos-systems/talos/pkg/constants"
tnet "github.com/talos-systems/talos/pkg/net"
)
@ -131,37 +132,15 @@ func (k *Kubelet) DependsOn(config runtime.Configurator) []string {
func (k *Kubelet) Runner(config runtime.Configurator) (runner.Runner, error) {
image := fmt.Sprintf("%s:v%s", constants.KubernetesImage, config.Cluster().Version())
_, serviceCIDR, err := net.ParseCIDR(config.Cluster().Network().ServiceCIDR())
if err != nil {
return nil, err
}
dnsServiceIP, err := tnet.NthIPInNetwork(serviceCIDR, 10)
a, err := k.args(config)
if err != nil {
return nil, err
}
// Set the process arguments.
args := runner.Args{
ID: k.ID(config),
ProcessArgs: []string{
"/hyperkube",
"kubelet",
"--bootstrap-kubeconfig=" + constants.KubeletBootstrapKubeconfig,
"--kubeconfig=" + constants.KubeletKubeconfig,
"--container-runtime=remote",
"--container-runtime-endpoint=unix://" + constants.ContainerdAddress,
"--anonymous-auth=false",
"--cert-dir=/var/lib/kubelet/pki",
"--client-ca-file=" + constants.KubernetesCACert,
"--cni-conf-dir=/etc/cni/net.d",
"--cluster-domain=cluster.local",
"--pod-manifest-path=/etc/kubernetes/manifests",
"--rotate-certificates",
"--cluster-dns=" + dnsServiceIP.String(),
// TODO(andrewrynhard): Only set this in the case of container run mode.
"--fail-swap-on=false",
},
ID: k.ID(config),
ProcessArgs: append([]string{"/hyperkube", "kubelet"}, a...),
}
// Set the required kubelet mounts.
mounts := []specs.Mount{
@ -247,3 +226,46 @@ func (k *Kubelet) HealthSettings(runtime.Configurator) *health.Settings {
return &settings
}
// nolint: gocyclo
func (k *Kubelet) args(config runtime.Configurator) ([]string, error) {
_, serviceCIDR, err := net.ParseCIDR(config.Cluster().Network().ServiceCIDR())
if err != nil {
return nil, err
}
dnsServiceIP, err := tnet.NthIPInNetwork(serviceCIDR, 10)
if err != nil {
return nil, err
}
blackListArgs := argsbuilder.Args{
"bootstrap-kubeconfig": constants.KubeletBootstrapKubeconfig,
"kubeconfig": constants.KubeletKubeconfig,
"container-runtime": "remote",
"container-runtime-endpoint": "unix://" + constants.ContainerdAddress,
"anonymous-auth": "false",
"cert-dir": "/var/lib/kubelet/pki",
"client-ca-file": constants.KubernetesCACert,
"cni-conf-dir": "/etc/cni/net.d",
"pod-manifest-path": "/etc/kubernetes/manifests",
"rotate-certificates": "true",
"cluster-dns": dnsServiceIP.String(),
// TODO(andrewrynhard): Only set this in the case of container run mode.
"fail-swap-on": "false",
}
extraArgs := argsbuilder.Args(config.Machine().Kubelet().ExtraArgs())
for k := range blackListArgs {
if extraArgs.Contains(k) {
return nil, argsbuilder.NewBlacklistError(k)
}
}
if !extraArgs.Contains("cluster-domain") {
extraArgs.Set("cluster-domain", "cluster.local")
}
return blackListArgs.Merge(extraArgs).Args(), nil
}

16
pkg/argsbuilder/argsbuilder_args.go
View File

@ -53,3 +53,19 @@ func (a Args) Contains(k Key) bool {
return ok
}
// BlackListError represents an error indicating that an argument was supplied
// that is not allowed.
type BlackListError struct {
s string
}
// NewBlacklistError returns a BlackListError.
func NewBlacklistError(s string) error {
return &BlackListError{s}
}
// Error implements the Error interface.
func (b *BlackListError) Error() string {
return fmt.Sprintf("extra arg %q is not allowed", b.s)
}

1
pkg/config/machine/machine.go
View File

@ -125,5 +125,6 @@ type Time interface {
// Kubelet defines the requirements for a config that pertains to kubelet
// related options.
type Kubelet interface {
ExtraArgs() map[string]string
ExtraMounts() []specs.Mount
}

15
pkg/config/types/v1alpha1/v1alpha1_configurator.go
View File

@ -118,7 +118,7 @@ func (m *MachineConfig) Time() machine.Time {
// Kubelet implements the Configurator interface.
func (m *MachineConfig) Kubelet() machine.Kubelet {
return m
return m.MachineKubelet
}
// Env implements the Configurator interface.
@ -168,8 +168,17 @@ func (m *MachineConfig) SetCertSANs(sans []string) {
m.MachineCertSANs = append(m.MachineCertSANs, sans...)
}
// ExtraArgs implements the Configurator interface.
func (k *KubeletConfig) ExtraArgs() map[string]string {
if k.KubeletExtraArgs == nil {
k.KubeletExtraArgs = make(map[string]string)
}
return k.KubeletExtraArgs
}
// ExtraMounts implements the Configurator interface.
func (m *MachineConfig) ExtraMounts() []specs.Mount {
func (k *KubeletConfig) ExtraMounts() []specs.Mount {
return nil
}
@ -239,7 +248,7 @@ func (e *EtcdConfig) CA() *x509.PEMEncodedCertificateAndKey {
// ExtraArgs implements the Configurator interface.
func (e *EtcdConfig) ExtraArgs() map[string]string {
if e.EtcdExtraArgs == nil {
return make(map[string]string)
e.EtcdExtraArgs = make(map[string]string)
}
return e.EtcdExtraArgs

2
pkg/config/types/v1alpha1/v1alpha1_types.go
View File

@ -266,7 +266,7 @@ type KubeletConfig struct {
// - |
// extraArgs:
// key: value
ExtraArgs map[string]string `yaml:"extraArgs,omitempty"`
KubeletExtraArgs map[string]string `yaml:"extraArgs,omitempty"`
}
// NetworkConfig reperesents the machine's networking config values.