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# Command line arguments

The following command line arguments are accepted by the Ingress controller executable.

They are set in the container spec of the `nginx-ingress-controller` Deployment manifest

Argument | Description
--- | ---
`--alsologtostderr` | log to standard error as well as files
`--annotations-prefix string` | Prefix of the Ingress annotations specific to the NGINX controller. (default "nginx.ingress.kubernetes.io")
`--apiserver-host string` | Address of the Kubernetes API server. Takes the form "protocol://address:port". If not specified, it is assumed the program runs inside a Kubernetes cluster and local discovery is attempted.
`--configmap string` | Name of the ConfigMap containing custom global configurations for the controller.
`--default-backend-service string` | Service used to serve HTTP requests not matching any known server name (catch-all). Takes the form "namespace/name". The controller configures NGINX to forward requests to the first port of this Service. If not specified, a 404 page will be returned directly from NGINX.
`--default-server-port int` | When `default-backend-service` is not specified or specified service does not have any endpoint, a local endpoint with this port will be used to serve 404 page from inside Nginx.
`--default-ssl-certificate string` | Secret containing a SSL certificate to be used by the default HTTPS server (catch-all). Takes the form "namespace/name".
`--disable-catch-all` | Disable support for catch-all Ingresses.
`--election-id string` | Election id to use for Ingress status updates. (default "ingress-controller-leader")
`--enable-dynamic-certificates` | Dynamically serves certificates instead of reloading NGINX when certificates are created, updated, or deleted. Currently does not support OCSP stapling, so --enable-ssl-chain-completion must be turned off (default behaviour). Assuming the certificate is generated with a 2048 bit RSA key/cert pair, this feature can store roughly 5000 certificates. (enabled by default)
`--enable-ssl-chain-completion` | Autocomplete SSL certificate chains with missing intermediate CA certificates. A valid certificate chain is required to enable OCSP stapling. Certificates uploaded to Kubernetes must have the "Authority Information Access" X.509 v3 extension for this to succeed. (default true)
`--enable-ssl-passthrough` | Enable SSL Passthrough.
`--health-check-path string` | URL path of the health check endpoint. Configured inside the NGINX status server. All requests received on the port defined by the healthz-port parameter are forwarded internally to this path. (default "/healthz")
`--health-check-timeout duration` | Time limit, in seconds, for a probe to health-check-path to succeed. (default 10)
`--healthz-port int` | Port to use for the healthz endpoint. (default 10254)
`--http-port int` | Port to use for servicing HTTP traffic. (default 80)
`--https-port int` | Port to use for servicing HTTPS traffic. (default 443)
`--ingress-class string` | Name of the ingress class this controller satisfies. The class of an Ingress object is set using the annotation "kubernetes.io/ingress.class". All ingress classes are satisfied if this parameter is left empty.
`--kubeconfig string` | Path to a kubeconfig file containing authorization and API server information.
`--log_backtrace_at traceLocation` | when logging hits line file:N, emit a stack trace (default :0)
`--log_dir string` | If non-empty, write log files in this directory
`--logtostderr` | log to standard error instead of files (default true)
`--profiling` | Enable profiling via web interface host:port/debug/pprof/ (default true)
`--publish-service string` | Service fronting the Ingress controller. Takes the form "namespace/name". When used together with update-status, the controller mirrors the address of this service's endpoints to the load-balancer status of all Ingress objects it satisfies.
`--publish-status-address string` | Customized address to set as the load-balancer status of Ingress objects this controller satisfies. Requires the update-status parameter.
`--report-node-internal-ip-address` | Set the load-balancer status of Ingress objects to internal Node addresses instead of external. Requires the update-status parameter.
`--ssl-passthrough-proxy-port int` | Port to use internally for SSL Passthrough. (default 442)
`--stderrthreshold severity` | logs at or above this threshold go to stderr (default 2)
`--sync-period duration` | Period at which the controller forces the repopulation of its local object stores. Disabled by default.
`--sync-rate-limit float32` | Define the sync frequency upper limit (default 0.3)
`--tcp-services-configmap string` | Name of the ConfigMap containing the definition of the TCP services to expose. The key in the map indicates the external port to be used. The value is a reference to a Service in the form "namespace/name:port", where "port" can either be a port number or name. TCP ports 80 and 443 are reserved by the controller for servicing HTTP traffic.
`--udp-services-configmap string` | Name of the ConfigMap containing the definition of the UDP services to expose. The key in the map indicates the external port to be used. The value is a reference to a Service in the form "namespace/name:port", where "port" can either be a port name or number.
`--update-status` | Update the load-balancer status of Ingress objects this controller satisfies. Requires setting the publish-service parameter to a valid Service reference. (default true)
`--update-status-on-shutdown` | Update the load-balancer status of Ingress objects when the controller shuts down. Requires the update-status parameter. (default true)
`-v`, `--v Level` | log level for V logs
`--version` | Show release information about the NGINX Ingress controller and exit.
`--vmodule moduleSpec` | comma-separated list of pattern=N settings for file-filtered logging
`--watch-namespace string` | Namespace the controller watches for updates to Kubernetes objects. This includes Ingresses, Services and all configuration resources. All namespaces are watched if this parameter is left empty.