Merge pull request #34719 from errordeveloper/api-and-disco-ports

Automatic merge from submit-queue

Add flags for alternative API and discovery ports

**What this PR does / why we need it**:

We had many issues reported due to the fact that we are using port 443 by default, and we should allow users to override whatever defaults we pick. This doesn't touch on `localhost:8080` yet, which should just generally get rid of.

**Which issue this PR fixes**: fixes #34311 #34307 #33638

**Special notes for your reviewer**: cc @pires 

**Release note**:
```release-note
Add `kubeadm` flags `--api-port` and `--discovery-port`, change default API port to 6443
```

hack/verify-flags/known-flags.txt

@@ -11,22 +11,26 @@ allow-privileged
 allowed-not-ready-nodes
 anonymous-auth
 api-advertise-addresses
-api-external-dns-names
 api-burst
+api-external-dns-names
+api-port
 api-prefix
 api-rate
-apiserver-count
 api-server-port
 api-servers
 api-token
 api-version
 apiserver-count
+apiserver-count
 audit-log-maxage
 audit-log-maxbackup
 audit-log-maxsize
 audit-log-path
 auth-path
+auth-path
 auth-provider
+auth-provider
+auth-provider-arg
 auth-provider-arg
 authentication-token-webhook-cache-ttl
 authentication-token-webhook-config-file
@@ -36,9 +40,6 @@ authorization-rbac-super-user
 authorization-webhook-cache-authorized-ttl
 authorization-webhook-cache-unauthorized-ttl
 authorization-webhook-config-file
-auth-path
-auth-provider
-auth-provider-arg
 babysit-daemons
 basic-auth-file
 bench-pods
@@ -55,8 +56,8 @@ build-tag
 cadvisor-port
 cert-dir
 certificate-authority
-cgroup-root
 cgroup-driver
+cgroup-root
 cgroups-per-qos
 chaos-chance
 clean-start
@@ -79,17 +80,17 @@ cluster-monitor-period
 cluster-name
 cluster-signing-cert-file
 cluster-signing-key-file
+cluster-tag
 cni-bin-dir
 cni-conf-dir
-cluster-tag
 concurrent-deployment-syncs
 concurrent-endpoint-syncs
 concurrent-gc-syncs
 concurrent-namespace-syncs
 concurrent-replicaset-syncs
 concurrent-resource-quota-syncs
-concurrent-serviceaccount-token-syncs
 concurrent-service-syncs
+concurrent-serviceaccount-token-syncs
 config-sync-period
 configure-cbr0
 configure-cloud-routes
@@ -100,10 +101,10 @@ conntrack-tcp-timeout-established
 consumer-port
 consumer-service-name
 consumer-service-namespace
+contain-pod-resources
 container-port
 container-runtime
 container-runtime-endpoint
-contain-pod-resources
 controller-start-interval
 cors-allowed-origins
 cpu-cfs-quota
@@ -129,17 +130,18 @@ deserialization-cache-size
 dest-file
 disable-filter
 disable-kubenet
+discovery-port
 dns-bind-address
 dns-port
 dns-provider
 dns-provider-config
-dockercfg-path
 docker-email
 docker-endpoint
 docker-exec-handler
 docker-password
 docker-server
 docker-username
+dockercfg-path
 driver-port
 drop-embedded-fields
 dry-run
@@ -153,10 +155,10 @@ enable-debugging-handlers
 enable-dynamic-provisioning
 enable-garbage-collector
 enable-garbage-collector
+enable-garbage-collector
 enable-hostpath-provisioner
 enable-server
 enable-swagger-ui
-enable-garbage-collector
 etcd-address
 etcd-cafile
 etcd-certfile
@@ -204,8 +206,8 @@ federated-api-qps
 federated-kube-context
 federation-name
 file-check-frequency
-file_content_in_loop
 file-suffix
+file_content_in_loop
 flex-volume-plugin-dir
 forward-services
 framework-name
@@ -215,6 +217,7 @@ from-file
 from-literal
 func-dest
 fuzz-iters
+garbage-collector-enabled
 gather-logs-sizes
 gather-metrics-at-teardown
 gather-resource-usage
@@ -234,10 +237,10 @@ healthz-bind-address
 healthz-port
 horizontal-pod-autoscaler-sync-period
 host-ipc-sources
-hostname-override
 host-network-sources
 host-pid-sources
 host-port-endpoints
+hostname-override
 http-check-frequency
 http-port
 ignore-daemonsets
@@ -249,8 +252,8 @@ image-project
 image-pull-policy
 image-service-endpoint
 include-extended-apis
-included-types-overrides
 include-extended-apis
+included-types-overrides
 input-base
 input-dirs
 insecure-allow-any-token
@@ -286,6 +289,10 @@ kops-zones
 kube-api-burst
 kube-api-content-type
 kube-api-qps
+kube-master
+kube-master
+kube-master-url
+kube-reserved
 kubecfg-file
 kubectl-path
 kubelet-address
@@ -307,10 +314,6 @@ kubelet-read-only-port
 kubelet-root-dir
 kubelet-sync-frequency
 kubelet-timeout
-kube-master
-kube-master
-kube-master-url
-kube-reserved
 kubernetes-service-node-port
 label-columns
 large-cluster-size-threshold
@@ -337,8 +340,6 @@ master-os-distro
 master-service-namespace
 max-concurrency
 max-connection-bytes-per-sec
-maximum-dead-containers
-maximum-dead-containers-per-container
 max-log-age
 max-log-backups
 max-log-size
@@ -347,6 +348,8 @@ max-outgoing-burst
 max-outgoing-qps
 max-pods
 max-requests-inflight
+maximum-dead-containers
+maximum-dead-containers-per-container
 mesos-authentication-principal
 mesos-authentication-provider
 mesos-authentication-secret-file
@@ -360,20 +363,22 @@ mesos-launch-grace-period
 mesos-master
 mesos-sandbox-overlay
 mesos-user
+min-pr-number
+min-request-timeout
+min-resync-period
 minimum-container-ttl-duration
 minimum-image-ttl-duration
 minion-max-log-age
 minion-max-log-backups
 minion-max-log-size
 minion-path-override
-min-pr-number
-min-request-timeout
-min-resync-period
 namespace-sync-period
 network-plugin
 network-plugin-dir
 network-plugin-mtu
 no-headers
+no-headers
+no-suggestions
 no-suggestions
 node-cidr-mask-size
 node-eviction-rate
@@ -392,9 +397,7 @@ node-port
 node-startup-grace-period
 node-status-update-frequency
 node-sync-period
-no-headers
 non-masquerade-cidr
-no-suggestions
 num-nodes
 oidc-ca-file
 oidc-client-id
@@ -403,6 +406,7 @@ oidc-issuer-url
 oidc-username-claim
 only-idl
 oom-score-adj
+out-version
 outofdisk-transition-frequency
 output-base
 output-directory
@@ -410,7 +414,6 @@ output-file-base
 output-package
 output-print-type
 output-version
-out-version
 path-override
 pod-cidr
 pod-eviction-timeout
@@ -433,7 +436,6 @@ proxy-logv
 proxy-mode
 proxy-port-range
 public-address-override
-pvclaimbinder-sync-period
 pv-recycler-increment-timeout-nfs
 pv-recycler-maximum-retry
 pv-recycler-minimum-timeout-hostpath
@@ -441,6 +443,7 @@ pv-recycler-minimum-timeout-nfs
 pv-recycler-pod-template-filepath-hostpath
 pv-recycler-pod-template-filepath-nfs
 pv-recycler-timeout-increment-hostpath
+pvclaimbinder-sync-period
 read-only-port
 really-crash-for-testing
 reconcile-cidr
@@ -459,8 +462,8 @@ replication-controller-lookup-cache-size
 repo-root
 report-dir
 report-prefix
-required-contexts
 require-kubeconfig
+required-contexts
 resolv-conf
 resource-container
 resource-quota-sync-period
@@ -494,8 +497,8 @@ service-account-key-file
 service-account-lookup
 service-account-private-key-file
 service-address
-service-cluster-ip-range
 service-cidr
+service-cluster-ip-range
 service-dns-domain
 service-generator
 service-node-port-range
@@ -545,9 +548,9 @@ test-timeout
 tls-ca-file
 tls-cert-file
 tls-private-key-file
+to-version
 token-auth-file
 ttl-keys-prefix
-to-version
 ttl-secs
 type-src
 udp-port
@@ -561,6 +564,7 @@ use-kubernetes-cluster-service
 use-kubernetes-version
 user-whitelist
 verify-only
+viper-config
 volume-dir
 volume-plugin-dir
 volume-stats-agg-period