mirror of
https://github.com/k8snetworkplumbingwg/multus-cni.git
synced 2026-03-18 19:04:12 +00:00
50c0357467
When running in server mode we can use a shared informer to listen for Pod events from the apiserver, and grab pod info from that cache rather than doing direct apiserver requests each time. This reduces apiserver load and retry latency, since multus can poll the local cache more frequently than it should do direct apiserver requests. Oddly static pods don't show up in the informer by the timeout and require a direct apiserver request. Since static pods are not common and are typically long-running, it should not be a big issue to fall back to direct apiserver access for them. Signed-off-by: Dan Williams <dcbw@redhat.com>
72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
// Copyright (c) 2022 Multus Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package server
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import (
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"net/http"
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"github.com/containernetworking/cni/pkg/invoke"
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"github.com/prometheus/client_golang/prometheus"
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"gopkg.in/k8snetworkplumbingwg/multus-cni.v4/pkg/k8sclient"
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"k8s.io/client-go/informers/internalinterfaces"
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"k8s.io/client-go/tools/cache"
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)
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const (
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// const block for multus-daemon configs
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// DefaultMultusDaemonConfigFile is the Default path of the config file
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DefaultMultusDaemonConfigFile = "/etc/cni/net.d/multus.d/daemon-config.json"
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// DefaultMultusRunDir specifies default RunDir for multus
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DefaultMultusRunDir = "/run/multus/"
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)
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// Metrics represents server's metrics.
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type Metrics struct {
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requestCounter *prometheus.CounterVec
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}
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// Server represents an HTTP server listening to a unix socket. It will handle
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// the CNI shim requests issued when a pod is added / removed.
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type Server struct {
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http.Server
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rundir string
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kubeclient *k8sclient.ClientInfo
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exec invoke.Exec
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serverConfig []byte
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metrics *Metrics
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informerFactory internalinterfaces.SharedInformerFactory
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podInformer cache.SharedIndexInformer
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}
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// ControllerNetConf for the controller cni configuration
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type ControllerNetConf struct {
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ChrootDir string `json:"chrootDir,omitempty"`
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LogFile string `json:"logFile"`
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LogLevel string `json:"logLevel"`
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LogToStderr bool `json:"logToStderr,omitempty"`
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MetricsPort *int `json:"metricsPort,omitempty"`
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// Option to point to the path of the unix domain socket through which the
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// multus client / server communicate.
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SocketDir string `json:"socketDir"`
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ConfigFileContents []byte `json:"-"`
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}
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