/
dynamicPlugin.go
134 lines (105 loc) · 3.59 KB
/
dynamicPlugin.go
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/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package dynamicPlugin
import (
"fmt"
"plugin"
"time"
typesplugin "github.com/Tencent/bk-bcs/bcs-common/common/plugin"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-scheduler/src/pluginManager/config"
bcsplugin "github.com/Tencent/bk-bcs/bcs-mesos/bcs-scheduler/src/pluginManager/plugin"
)
type dynamicPlugin struct {
currentDir string
name string
conf *config.PluginConfig
timeout int
initErr error
getHostAttributes func(*typesplugin.HostPluginParameter) (map[string]*typesplugin.HostAttributes, error)
}
// NewDynamicPlugin loading plugin according configuration
func NewDynamicPlugin(dir string, conf *config.PluginConfig) (bcsplugin.Plugin, error) {
p := &dynamicPlugin{
currentDir: dir,
conf: conf,
name: conf.Name,
timeout: conf.Timeout,
}
err := p.initPlugin()
if err != nil {
err = fmt.Errorf("plugin %s init plugin error %s", p.name, err.Error())
p.initErr = err
}
return p, nil
}
func (p *dynamicPlugin) initPlugin() error {
pluginPath := fmt.Sprintf("%s/bin/%s/%s.so", p.currentDir, p.name, p.name)
outPlugin, err := plugin.Open(pluginPath)
if err != nil {
err = fmt.Errorf("init plugin %s error %s", pluginPath, err.Error())
return err
}
pluginInit, err := outPlugin.Lookup("Init")
if err != nil {
err = fmt.Errorf("plugin %s lookup func Init error %s", pluginPath, err.Error())
return err
}
initFunc, ok := pluginInit.(func(*typesplugin.InitPluginParameter) error)
if !ok {
err = fmt.Errorf("plugin %s func Init convert to function error %s", pluginPath, err.Error())
return err
}
pluginPara := &typesplugin.InitPluginParameter{
ConfPath: fmt.Sprintf("%s/bin/%s", p.currentDir, p.name),
}
err = initFunc(pluginPara)
if err != nil {
return err
}
outScheduler, err := outPlugin.Lookup("GetHostAttributes")
if err != nil {
err = fmt.Errorf("plugin %s lookup func GetHostAttributes error %s", pluginPath, err.Error())
return err
}
schedulerFunc, ok := outScheduler.(func(*typesplugin.HostPluginParameter) (map[string]*typesplugin.HostAttributes, error))
if !ok {
err = fmt.Errorf("plugin %s func GetHostAttributes convert to function error %s", pluginPath, err.Error())
return err
}
p.getHostAttributes = schedulerFunc
return nil
}
// GetHostAttributes interface implementation
func (p *dynamicPlugin) GetHostAttributes(para *typesplugin.HostPluginParameter) (map[string]*typesplugin.HostAttributes, error) {
if p.initErr != nil {
return nil, p.initErr
}
chAttr := make(chan map[string]*typesplugin.HostAttributes, 1)
chErr := make(chan error, 1)
go func() {
attrs, err := p.getHostAttributes(para)
chAttr <- attrs
chErr <- err
}()
ticker := time.NewTicker(time.Second * time.Duration(p.timeout))
defer ticker.Stop()
select {
case <-ticker.C:
return nil, fmt.Errorf("plugin %s GetHostAttributes timeout %ds", p.name, p.timeout)
case err := <-chErr:
if err != nil {
return nil, err
}
}
return <-chAttr, nil
}