mirror of
https://github.com/k3s-io/kubernetes.git
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124 lines
3.3 KiB
Go
124 lines
3.3 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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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 unversioned
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net"
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"net/http"
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"strconv"
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cadvisorapi "github.com/google/cadvisor/info/v1"
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)
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type ContainerInfoGetter interface {
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// GetContainerInfo returns information about a container.
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GetContainerInfo(host, podID, containerID string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error)
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// GetRootInfo returns information about the root container on a machine.
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GetRootInfo(host string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error)
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// GetMachineInfo returns the machine's information like number of cores, memory capacity.
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GetMachineInfo(host string) (*cadvisorapi.MachineInfo, error)
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}
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type HTTPContainerInfoGetter struct {
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Client *http.Client
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Port int
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}
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func (self *HTTPContainerInfoGetter) GetMachineInfo(host string) (*cadvisorapi.MachineInfo, error) {
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request, err := http.NewRequest(
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"GET",
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fmt.Sprintf("http://%v/spec",
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net.JoinHostPort(host, strconv.Itoa(self.Port)),
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),
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nil,
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)
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if err != nil {
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return nil, err
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}
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response, err := self.Client.Do(request)
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if err != nil {
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return nil, err
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}
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defer response.Body.Close()
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if response.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("trying to get machine spec from %v; received status %v",
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host, response.Status)
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}
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var minfo cadvisorapi.MachineInfo
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err = json.NewDecoder(response.Body).Decode(&minfo)
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if err != nil {
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return nil, err
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}
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return &minfo, nil
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}
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func (self *HTTPContainerInfoGetter) getContainerInfo(host, path string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error) {
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var body io.Reader
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if req != nil {
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content, err := json.Marshal(req)
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if err != nil {
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return nil, err
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}
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body = bytes.NewBuffer(content)
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}
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request, err := http.NewRequest(
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"GET",
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fmt.Sprintf("http://%v/stats/%v",
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net.JoinHostPort(host, strconv.Itoa(self.Port)),
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path,
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),
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body,
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)
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if err != nil {
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return nil, err
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}
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response, err := self.Client.Do(request)
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if err != nil {
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return nil, err
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}
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defer response.Body.Close()
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if response.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("trying to get info for %v from %v; received status %v",
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path, host, response.Status)
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}
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var cinfo cadvisorapi.ContainerInfo
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err = json.NewDecoder(response.Body).Decode(&cinfo)
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if err != nil {
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return nil, err
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}
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return &cinfo, nil
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}
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func (self *HTTPContainerInfoGetter) GetContainerInfo(host, podID, containerID string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error) {
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return self.getContainerInfo(
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host,
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fmt.Sprintf("%v/%v", podID, containerID),
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req,
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)
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}
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func (self *HTTPContainerInfoGetter) GetRootInfo(host string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error) {
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return self.getContainerInfo(host, "", req)
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}
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