mirror of
https://github.com/k3s-io/kubernetes.git
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138 lines
3.9 KiB
Go
138 lines
3.9 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 client
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import (
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"errors"
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"fmt"
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"net"
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"net/http"
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"time"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/validation"
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"k8s.io/kubernetes/pkg/client/transport"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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utilnet "k8s.io/kubernetes/pkg/util/net"
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)
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type KubeletClientConfig struct {
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// Default port - used if no information about Kubelet port can be found in Node.NodeStatus.DaemonEndpoints.
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Port uint
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EnableHttps bool
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// TLSClientConfig contains settings to enable transport layer security
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client.TLSClientConfig
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// Server requires Bearer authentication
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BearerToken string
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// HTTPTimeout is used by the client to timeout http requests to Kubelet.
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HTTPTimeout time.Duration
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// Dial is a custom dialer used for the client
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Dial func(net, addr string) (net.Conn, error)
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}
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// KubeletClient is an interface for all kubelet functionality
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type KubeletClient interface {
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ConnectionInfoGetter
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}
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type ConnectionInfoGetter interface {
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GetConnectionInfo(ctx api.Context, nodeName string) (scheme string, port uint, transport http.RoundTripper, err error)
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}
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// HTTPKubeletClient is the default implementation of KubeletHealthchecker, accesses the kubelet over HTTP.
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type HTTPKubeletClient struct {
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Client *http.Client
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Config *KubeletClientConfig
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}
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func MakeTransport(config *KubeletClientConfig) (http.RoundTripper, error) {
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tlsConfig, err := transport.TLSConfigFor(config.transportConfig())
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if err != nil {
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return nil, err
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}
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rt := http.DefaultTransport
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if config.Dial != nil || tlsConfig != nil {
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rt = utilnet.SetTransportDefaults(&http.Transport{
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Dial: config.Dial,
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TLSClientConfig: tlsConfig,
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})
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}
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return transport.HTTPWrappersForConfig(config.transportConfig(), rt)
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}
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// TODO: this structure is questionable, it should be using client.Config and overriding defaults.
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func NewStaticKubeletClient(config *KubeletClientConfig) (KubeletClient, error) {
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transport, err := MakeTransport(config)
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if err != nil {
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return nil, err
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}
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c := &http.Client{
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Transport: transport,
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Timeout: config.HTTPTimeout,
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}
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return &HTTPKubeletClient{
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Client: c,
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Config: config,
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}, nil
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}
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// In default HTTPKubeletClient ctx is unused.
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func (c *HTTPKubeletClient) GetConnectionInfo(ctx api.Context, nodeName string) (string, uint, http.RoundTripper, error) {
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if ok, msg := validation.ValidateNodeName(nodeName, false); !ok {
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return "", 0, nil, fmt.Errorf("invalid node name: %s", msg)
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}
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scheme := "http"
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if c.Config.EnableHttps {
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scheme = "https"
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}
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return scheme, c.Config.Port, c.Client.Transport, nil
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}
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// FakeKubeletClient is a fake implementation of KubeletClient which returns an error
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// when called. It is useful to pass to the master in a test configuration with
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// no kubelets.
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type FakeKubeletClient struct{}
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func (c FakeKubeletClient) GetConnectionInfo(ctx api.Context, nodeName string) (string, uint, http.RoundTripper, error) {
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return "", 0, nil, errors.New("Not Implemented")
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}
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// transportConfig converts a client config to an appropriate transport config.
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func (c *KubeletClientConfig) transportConfig() *transport.Config {
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cfg := &transport.Config{
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TLS: transport.TLSConfig{
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CAFile: c.CAFile,
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CAData: c.CAData,
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CertFile: c.CertFile,
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CertData: c.CertData,
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KeyFile: c.KeyFile,
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KeyData: c.KeyData,
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},
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BearerToken: c.BearerToken,
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}
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if c.EnableHttps && !cfg.HasCA() {
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cfg.TLS.Insecure = true
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}
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return cfg
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}
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