56 lines
2.5 KiB
Go
56 lines
2.5 KiB
Go
package options
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import (
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"github.com/spf13/pflag"
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)
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const (
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defaultBindAddress = "0.0.0.0"
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defaultPort = 8443
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defaultCertDir = "/tmp/k8s-webhook-server/serving-certs"
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defaultTLSMinVersion = "1.3"
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)
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// Options contains everything necessary to create and run webhook server.
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type Options struct {
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// BindAddress is the IP address on which to listen for the --secure-port port.
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// Default is "0.0.0.0".
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BindAddress string
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// SecurePort is the port that the webhook server serves at.
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// Default is 8443.
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SecurePort int
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// CertDir is the directory that contains the server key and certificate.
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// if not set, webhook server would look up the server key and certificate in {TempDir}/k8s-webhook-server/serving-certs.
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// The server key and certificate must be named `tls.key` and `tls.crt`, respectively.
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CertDir string
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// TLSMinVersion is the minimum version of TLS supported. Possible values: 1.0, 1.1, 1.2, 1.3.
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// Some environments have automated security scans that trigger on TLS versions or insecure cipher suites, and
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// setting TLS to 1.3 would solve both problems.
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// Defaults to 1.3.
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TLSMinVersion string
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// KubeAPIQPS is the QPS to use while talking with karmada-apiserver.
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KubeAPIQPS float32
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// KubeAPIBurst is the burst to allow while talking with karmada-apiserver.
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KubeAPIBurst int
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}
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// NewOptions builds an empty options.
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func NewOptions() *Options {
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return &Options{}
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}
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// AddFlags adds flags to the specified FlagSet.
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func (o *Options) AddFlags(flags *pflag.FlagSet) {
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flags.Lookup("kubeconfig").Usage = "Path to karmada control plane kubeconfig file."
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flags.StringVar(&o.BindAddress, "bind-address", defaultBindAddress,
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"The IP address on which to listen for the --secure-port port.")
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flags.IntVar(&o.SecurePort, "secure-port", defaultPort,
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"The secure port on which to serve HTTPS.")
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flags.StringVar(&o.CertDir, "cert-dir", defaultCertDir,
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"The directory that contains the server key(named tls.key) and certificate(named tls.crt).")
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flags.StringVar(&o.TLSMinVersion, "tls-min-version", defaultTLSMinVersion, "Minimum TLS version supported. Possible values: 1.0, 1.1, 1.2, 1.3.")
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flags.Float32Var(&o.KubeAPIQPS, "kube-api-qps", 40.0, "QPS to use while talking with karmada-apiserver. Doesn't cover events and node heartbeat apis which rate limiting is controlled by a different set of flags.")
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flags.IntVar(&o.KubeAPIBurst, "kube-api-burst", 60, "Burst to use while talking with karmada-apiserver. Doesn't cover events and node heartbeat apis which rate limiting is controlled by a different set of flags.")
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}
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