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這篇文章跟大家分析一下“如何進行external-provisioner組件的啟動參數進行分析”。內容詳細易懂,對“如何進行external-provisioner組件的啟動參數進行分析”感興趣的朋友可以跟著小編的思路慢慢深入來閱讀一下,希望閱讀后能夠對大家有所幫助。下面跟著小編一起深入學習“如何進行external-provisioner組件的啟動參數進行分析”的知識吧。
具體參考https://github.com/kubernetes-csi/external-provisioner#command-line-options
var ( master = flag.String("master", "", "Master URL to build a client config from. Either this or kubeconfig needs to be set if the provisioner is being run out of cluster.") kubeconfig = flag.String("kubeconfig", "", "Absolute path to the kubeconfig file. Either this or master needs to be set if the provisioner is being run out of cluster.") csiEndpoint = flag.String("csi-address", "/run/csi/socket", "The gRPC endpoint for Target CSI Volume.") _ = deprecatedflags.Add("connection-timeout") volumeNamePrefix = flag.String("volume-name-prefix", "pvc", "Prefix to apply to the name of a created volume.") volumeNameUUIDLength = flag.Int("volume-name-uuid-length", -1, "Truncates generated UUID of a created volume to this length. Defaults behavior is to NOT truncate.") showVersion = flag.Bool("version", false, "Show version.") retryIntervalStart = flag.Duration("retry-interval-start", time.Second, "Initial retry interval of failed provisioning or deletion. It doubles with each failure, up to retry-interval-max.") retryIntervalMax = flag.Duration("retry-interval-max", 5*time.Minute, "Maximum retry interval of failed provisioning or deletion.") workerThreads = flag.Uint("worker-threads", 100, "Number of provisioner worker threads, in other words nr. of simultaneous CSI calls.") finalizerThreads = flag.Uint("cloning-protection-threads", 1, "Number of simultaniously running threads, handling cloning finalizer removal") operationTimeout = flag.Duration("timeout", 10*time.Second, "Timeout for waiting for creation or deletion of a volume") _ = deprecatedflags.Add("provisioner") enableLeaderElection = flag.Bool("enable-leader-election", false, "Enables leader election. If leader election is enabled, additional RBAC rules are required. Please refer to the Kubernetes CSI documentation for instructions on setting up these RBAC rules.") leaderElectionType = flag.String("leader-election-type", "endpoints", "the type of leader election, options are 'endpoints' (default) or 'leases' (strongly recommended). The 'endpoints' option is deprecated in favor of 'leases'.") leaderElectionNamespace = flag.String("leader-election-namespace", "", "Namespace where the leader election resource lives. Defaults to the pod namespace if not set.") strictTopology = flag.Bool("strict-topology", false, "Passes only selected node topology to CreateVolume Request, unlike default behavior of passing aggregated cluster topologies that match with topology keys of the selected node.") extraCreateMetadata = flag.Bool("extra-create-metadata", false, "If set, add pv/pvc metadata to plugin create requests as parameters.") metricsAddress = flag.String("metrics-address", "", "The TCP network address where the prometheus metrics endpoint will listen (example: `:8080`). The default is empty string, which means metrics endpoint is disabled.") metricsPath = flag.String("metrics-path", "/metrics", "The HTTP path where prometheus metrics will be exposed. Default is `/metrics`.") featureGates map[string]bool provisionController *controller.ProvisionController version = "unknown" ) func main() { var config *rest.Config var err error flag.Var(utilflag.NewMapStringBool(&featureGates), "feature-gates", "A set of key=value pairs that describe feature gates for alpha/experimental features. "+ "Options are:\n"+strings.Join(utilfeature.DefaultFeatureGate.KnownFeatures(), "\n")) klog.InitFlags(nil) flag.CommandLine.AddGoFlagSet(goflag.CommandLine) flag.Set("logtostderr", "true") flag.Parse() ......
... args: - "--csi-address=$(ADDRESS)" - "--v=5" - "--timeout=150s" - "--retry-interval-start=500ms" - "--enable-leader-election=true" - "--leader-election-type=leases" - "--feature-gates=Topology=true" env: - name: ADDRESS value: unix:///csi/csi-provisioner.sock imagePullPolicy: "Always" volumeMounts: - name: socket-dir mountPath: /csi volumes: - name: socket-dir emptyDir: { medium: "Memory" } ...
下面是部分參數解析。其他參數請參考:https://github.com/kubernetes-csi/external-provisioner#command-line-options
ceph-csi組件暴露的grpc服務socket地址,external-provisioner組件將與該socket地址通信,發出創建、刪除存儲的請求。默認值為/run/csi/socket
。
創建存儲與刪除存儲請求的超時時間,默認10秒。
是否開啟leader選舉,配置值為true
時開啟,默認值為false
。
leader選舉時使用的鎖類型,包括兩種,默認的endpoint
與官方推薦的lease
。
leader選舉所使用的鎖對象存儲在哪個命令空間,默認存儲在external-provisioner pod所在的命名空間。
設置為true
后,創建存儲時,將額外增加請求參數:pvc的名稱、命名空間、pv的名稱,默認值為false
。
同時執行CreateVolume/DeleteVolume操作的worker數量,默認值為100。
創建、刪除存儲失敗后的初始重試時間間隔,默認值為1秒。每一次失敗,重試時間間隔會加倍,直到達到--retry-interval-max
配置的上限值。
創建、刪除存儲失敗后的最大重試時間間隔,默認值為5分鐘。
創建pv時給pv名稱加的前綴,默認值為pvc
。
特性配置。
配置示例:--feature-gates=Topology=true
,存儲拓撲相關,具體使用請參考:
https://kubernetes.io/zh/blog/2018/10/11/kubernetes-%E4%B8%AD%E7%9A%84%E6%8B%93%E6%89%91%E6%84%9F%E7%9F%A5%E6%95%B0%E6%8D%AE%E5%8D%B7%E4%BE%9B%E5%BA%94/
https://kubernetes-csi.github.io/docs/topology.html
用于kube-client與kube-apiserver通信時客戶端kube-client的限流。
限流實現上是令牌桶算法,kube-api-qps可以看作是每秒產生令牌的速度,而kube-api-burst可以看作是令牌桶的大小,kube-client發送給kube-apiserver的請求需要拿到令牌桶里的令牌后才能發送。
其中kube-api-qps
默認值為5,kube-api-burst
默認值為10。
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