mirror of https://github.com/k3s-io/k3s
122 lines
3.3 KiB
Go
122 lines
3.3 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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"net"
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"net/http"
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"net/url"
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"strconv"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/probe"
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httprobe "github.com/GoogleCloudPlatform/kubernetes/pkg/probe/http"
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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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KubeletHealthChecker
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ConnectionInfoGetter
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}
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// KubeletHealthchecker is an interface for healthchecking kubelets
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type KubeletHealthChecker interface {
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HealthCheck(host string) (result probe.Result, output string, err error)
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}
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type ConnectionInfoGetter interface {
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GetConnectionInfo(host 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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Port uint
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EnableHttps bool
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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 NewKubeletClient(config *KubeletConfig) (KubeletClient, error) {
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transport := http.DefaultTransport
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cfg := &Config{TLSClientConfig: config.TLSClientConfig}
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if config.EnableHttps {
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hasCA := len(config.CAFile) > 0 || len(config.CAData) > 0
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if !hasCA {
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cfg.Insecure = true
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}
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}
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tlsConfig, err := TLSConfigFor(cfg)
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if err != nil {
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return nil, err
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}
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if tlsConfig != nil {
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transport = &http.Transport{
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TLSClientConfig: tlsConfig,
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}
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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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Port: config.Port,
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EnableHttps: config.EnableHttps,
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}, nil
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}
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func (c *HTTPKubeletClient) GetConnectionInfo(host string) (string, uint, http.RoundTripper, error) {
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scheme := "http"
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if c.EnableHttps {
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scheme = "https"
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}
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return scheme, c.Port, c.Client.Transport, nil
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}
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func (c *HTTPKubeletClient) url(host, path, query string) string {
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scheme := "http"
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if c.EnableHttps {
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scheme = "https"
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}
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return (&url.URL{
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Scheme: scheme,
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Host: net.JoinHostPort(host, strconv.FormatUint(uint64(c.Port), 10)),
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Path: path,
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RawQuery: query,
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}).String()
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}
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func (c *HTTPKubeletClient) HealthCheck(host string) (probe.Result, string, error) {
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return httprobe.DoHTTPProbe(c.url(host, "/healthz", ""), c.Client)
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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) HealthCheck(host string) (probe.Result, string, error) {
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return probe.Unknown, "", errors.New("Not Implemented")
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}
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func (c FakeKubeletClient) GetConnectionInfo(host 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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