config.go
cri的配置，四个参数：监听的服务cri的地址、cni插件（bin）的目录、cni插件配置的目录、sandbox container的镜像
type Config struct {
Listen string // Listen is the listening address which servers CRI.
NetworkPluginBinDir string // NetworkPluginBinDir is the directory in which the binaries for the plugin is kept.
NetworkPluginConfDir string // NetworkPluginConfDir is the directory in which the admin places a CNI conf.
SandboxImage string // SandboxImage is the image used by sandbox container.
}
service
serve用来serve来自kubelet的grpc api
type Service struct {
config *config.Config //pouchd的config
server *grpc.Server
criMgr cri.CriMgr
}
new 一个service的时候，注册runtime service server和注册image service server
